fem based design and simulation tool for ... - uk.comsol.com€¦ · 11.10.2012 milan, italy necip...
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![Page 1: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/1.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Based Design and Simulation Tool forMRI Birdcage Coils Including Eigenfrequency
Analysis
Necip Gurler and Yusuf Ziya Ider
Electrical and Electronics Engineering DepartmentBilkent University, Ankara, TURKEY
11.10.2012Milan, Italy
Necip Gurler COMSOL CONFERENCE EUROPE 2012
Excerpt from the Proceedings of the 2012 COMSOL Conference in Milan
![Page 2: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/2.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Outline1 Introduction
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
2 MotivationReview of previous studiesProblem definitionOur work
3 MethodsFEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
4 Experimental Results5 Conclusion
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 3: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/3.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
Outline1 Introduction
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
2 MotivationReview of previous studiesProblem definitionOur work
3 MethodsFEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
4 Experimental Results5 Conclusion
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 4: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/4.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
Outline1 Introduction
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
2 MotivationReview of previous studiesProblem definitionOur work
3 MethodsFEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
4 Experimental Results5 Conclusion
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 5: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/5.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
What Do the RF Coils Serve in MRI?
generate RF magnetic field (B1 field) at the Larmorfrequencyreceive RF signals at the same frequency
Source of figures: http://www.cis.rit.edu/htbooks/mri/chap-9/chap-9.htm
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 6: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/6.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
RF Birdcage Head Coil Example
Source of figure: http://www.healthcare.philips.com
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 7: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/7.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
Outline1 Introduction
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
2 MotivationReview of previous studiesProblem definitionOur work
3 MethodsFEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
4 Experimental Results5 Conclusion
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 8: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/8.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
RF Birdcage Coils
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 9: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/9.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
RF Birdcage Coils
based on the lumped element delay line (Hayes et al., 1985)
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 10: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/10.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
RF Birdcage Coils
based on the lumped element delay line (Hayes et al., 1985)
widely used in MRI
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 11: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/11.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
RF Birdcage Coils
based on the lumped element delay line (Hayes et al., 1985)
widely used in MRI
Advantages
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 12: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/12.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
RF Birdcage Coils
based on the lumped element delay line (Hayes et al., 1985)
widely used in MRI
Advantages
very homogeneous RF magnetic field
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 13: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/13.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
RF Birdcage Coils
based on the lumped element delay line (Hayes et al., 1985)
widely used in MRI
Advantages
very homogeneous RF magnetic field
high signal-to-noise ratio (SNR)
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 14: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/14.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
RF Birdcage Coils
based on the lumped element delay line (Hayes et al., 1985)
widely used in MRI
Advantages
very homogeneous RF magnetic field
high signal-to-noise ratio (SNR)
quadrature excitation and reception capability
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 15: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/15.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
Birdcage Coils Consist of...
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 16: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/16.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
Birdcage Coils Consist of...
two circular end rings connected by N equally spacedrungs (or legs)
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 17: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/17.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
Birdcage Coils Consist of...
two circular end rings connected by N equally spacedrungs (or legs)
capacitors on the rungs or end rings or both
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 18: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/18.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
Resonance Behavior of Birdcage Coils
A birdcage coil with N number of rungs andequal valued capacitors has
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 19: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/19.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
Resonance Behavior of Birdcage Coils
A birdcage coil with N number of rungs andequal valued capacitors has
N/2 resonant modes (m=1,2... N/2)
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 20: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/20.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
Resonance Behavior of Birdcage Coils
A birdcage coil with N number of rungs andequal valued capacitors has
N/2 resonant modes (m=1,2... N/2)
degenerate mode pairs - two modes with the samefrequency
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 21: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/21.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
Resonance Behavior of Birdcage Coils
A birdcage coil with N number of rungs andequal valued capacitors has
N/2 resonant modes (m=1,2... N/2)
degenerate mode pairs - two modes with the samefrequency
end ring resonant mode (m=0)
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 22: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/22.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
Resonance Behavior of Birdcage Coils
A birdcage coil with N number of rungs andequal valued capacitors has
N/2 resonant modes (m=1,2... N/2)
degenerate mode pairs - two modes with the samefrequency
end ring resonant mode (m=0)currents only flow in the end rings - Helmholtz pair
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 23: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/23.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
Which Resonant Mode is used in MRI?
most homogeneous B1 field
sinusoidal current distribution in the rungs for m = 1 mode
Source of figure: M. Lupu, MAGMA, 2004, 17, 363-371
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 24: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/24.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
Which Resonant Mode is used in MRI?
most homogeneous B1 field
sinusoidal current distribution in the rungs for m = 1 mode
Source of figure: M. Lupu, MAGMA, 2004, 17, 363-371
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 25: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/25.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
Which Resonant Mode is used in MRI?
most homogeneous B1 field
sinusoidal current distribution in the rungs for m = 1 mode
Source of figure: M. Lupu, MAGMA, 2004, 17, 363-371
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 26: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/26.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
Outline1 Introduction
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
2 MotivationReview of previous studiesProblem definitionOur work
3 MethodsFEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
4 Experimental Results5 Conclusion
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 27: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/27.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
Designing a RF Birdcage Coil
In order to generate a homogeneous B1 field at the desiredfrequency;
use the correct capacitance valuecalculate an initial capacitance valuetuning and matching procedures
knowing resonant modes of the birdcage coiltuning and matching procedures can be done withoutinterfering with the other modesm=0 mode is used in open MRI systems
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 28: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/28.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
Designing a RF Birdcage Coil
In order to generate a homogeneous B1 field at the desiredfrequency;
use the correct capacitance valuecalculate an initial capacitance valuetuning and matching procedures
knowing resonant modes of the birdcage coiltuning and matching procedures can be done withoutinterfering with the other modesm=0 mode is used in open MRI systems
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 29: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/29.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
Designing a RF Birdcage Coil
In order to generate a homogeneous B1 field at the desiredfrequency;
use the correct capacitance valuecalculate an initial capacitance valuetuning and matching procedures
knowing resonant modes of the birdcage coiltuning and matching procedures can be done withoutinterfering with the other modesm=0 mode is used in open MRI systems
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 30: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/30.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
Designing a RF Birdcage Coil
In order to generate a homogeneous B1 field at the desiredfrequency;
use the correct capacitance valuecalculate an initial capacitance valuetuning and matching procedures
knowing resonant modes of the birdcage coiltuning and matching procedures can be done withoutinterfering with the other modesm=0 mode is used in open MRI systems
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 31: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/31.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
Designing a RF Birdcage Coil
In order to generate a homogeneous B1 field at the desiredfrequency;
use the correct capacitance valuecalculate an initial capacitance valuetuning and matching procedures
knowing resonant modes of the birdcage coiltuning and matching procedures can be done withoutinterfering with the other modesm=0 mode is used in open MRI systems
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 32: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/32.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
Designing a RF Birdcage Coil
In order to generate a homogeneous B1 field at the desiredfrequency;
use the correct capacitance valuecalculate an initial capacitance valuetuning and matching procedures
knowing resonant modes of the birdcage coiltuning and matching procedures can be done withoutinterfering with the other modesm=0 mode is used in open MRI systems
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 33: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/33.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
Designing a RF Birdcage Coil
In order to generate a homogeneous B1 field at the desiredfrequency;
use the correct capacitance valuecalculate an initial capacitance valuetuning and matching procedures
knowing resonant modes of the birdcage coiltuning and matching procedures can be done withoutinterfering with the other modesm=0 mode is used in open MRI systems
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 34: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/34.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
Designing a RF Birdcage Coil
In order to generate a homogeneous B1 field at the desiredfrequency;
use the correct capacitance valuecalculate an initial capacitance valuetuning and matching procedures
knowing resonant modes of the birdcage coiltuning and matching procedures can be done withoutinterfering with the other modesm=0 mode is used in open MRI systems
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 35: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/35.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
Designing a RF Birdcage Coil
In order to generate a homogeneous B1 field at the desiredfrequency;
use the correct capacitance valuecalculate an initial capacitance valuetuning and matching procedures
knowing resonant modes of the birdcage coiltuning and matching procedures can be done withoutinterfering with the other modesm=0 mode is used in open MRI systems
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 36: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/36.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
Simulating a RF Birdcage Coil
Solving for the electromagnetic fields of a birdcage coil at thespecified frequency.
B1 field distribution inside the coil
specific absorption rate (SAR) at any object
variation of any electromagnetic field variables with respectto frequency
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 37: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/37.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
Simulating a RF Birdcage Coil
Solving for the electromagnetic fields of a birdcage coil at thespecified frequency.
B1 field distribution inside the coil
specific absorption rate (SAR) at any object
variation of any electromagnetic field variables with respectto frequency
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 38: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/38.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
Simulating a RF Birdcage Coil
Solving for the electromagnetic fields of a birdcage coil at thespecified frequency.
B1 field distribution inside the coil
specific absorption rate (SAR) at any object
variation of any electromagnetic field variables with respectto frequency
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 39: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/39.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
Simulating a RF Birdcage Coil
Solving for the electromagnetic fields of a birdcage coil at thespecified frequency.
B1 field distribution inside the coil
specific absorption rate (SAR) at any object
variation of any electromagnetic field variables with respectto frequency
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 40: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/40.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Review of previous studiesProblem definitionOur work
Outline1 Introduction
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
2 MotivationReview of previous studiesProblem definitionOur work
3 MethodsFEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
4 Experimental Results5 Conclusion
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 41: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/41.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Review of previous studiesProblem definitionOur work
Outline1 Introduction
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
2 MotivationReview of previous studiesProblem definitionOur work
3 MethodsFEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
4 Experimental Results5 Conclusion
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 42: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/42.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Review of previous studiesProblem definitionOur work
Studies on Designing a Birdcage CoilTropp, 1989analyzing low-pass birdcage resonator - using lumped circuitelement model and perturbation theory
Jin, 1989resonant modes calculation - lumped circuit element model
Pascone et al., 1991analyzing both low-pass and high-pass birdcage coil - usingtransmission line theory
Leifer, 1997resonant modes calculation - using discrete Fourier transform
Chin et al., 2002capacitance calculation - lumped circuit element model
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 43: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/43.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Review of previous studiesProblem definitionOur work
Studies on Designing a Birdcage CoilTropp, 1989analyzing low-pass birdcage resonator - using lumped circuitelement model and perturbation theory
Jin, 1989resonant modes calculation - lumped circuit element model
Pascone et al., 1991analyzing both low-pass and high-pass birdcage coil - usingtransmission line theory
Leifer, 1997resonant modes calculation - using discrete Fourier transform
Chin et al., 2002capacitance calculation - lumped circuit element model
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 44: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/44.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Review of previous studiesProblem definitionOur work
Studies on Designing a Birdcage CoilTropp, 1989analyzing low-pass birdcage resonator - using lumped circuitelement model and perturbation theory
Jin, 1989 - MRIEM Software Toolresonant modes calculation - lumped circuit element model
Pascone et al., 1991analyzing both low-pass and high-pass birdcage coil - usingtransmission line theory
Leifer, 1997resonant modes calculation - using discrete Fourier transform
Chin et al., 2002capacitance calculation - lumped circuit element model
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 45: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/45.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Review of previous studiesProblem definitionOur work
Lumped Circuit Element Model
end rings and rungs are modeled as inductors
self and mutual inductances are calculated usinghandbook formulas
equivalent circuit model (LC network) is solved usingKirchoff’s voltage and current laws
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 46: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/46.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Review of previous studiesProblem definitionOur work
Lumped Circuit Element Model
end rings and rungs are modeled as inductors
self and mutual inductances are calculated usinghandbook formulas
equivalent circuit model (LC network) is solved usingKirchoff’s voltage and current laws
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 47: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/47.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Review of previous studiesProblem definitionOur work
Lumped Circuit Element Model
end rings and rungs are modeled as inductors
self and mutual inductances are calculated usinghandbook formulas
equivalent circuit model (LC network) is solved usingKirchoff’s voltage and current laws
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 48: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/48.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Review of previous studiesProblem definitionOur work
Lumped Circuit Element Model
end rings and rungs are modeled as inductors
self and mutual inductances are calculated usinghandbook formulas
equivalent circuit model (LC network) is solved usingKirchoff’s voltage and current laws
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 49: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/49.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Review of previous studiesProblem definitionOur work
Lumped Circuit Element Model
Figure: Equivalent lumped circuit element models for low-passand high-pass birdcage coils
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 50: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/50.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Review of previous studiesProblem definitionOur work
Outline1 Introduction
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
2 MotivationReview of previous studiesProblem definitionOur work
3 MethodsFEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
4 Experimental Results5 Conclusion
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 51: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/51.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Review of previous studiesProblem definitionOur work
Limitation of Lumped Circuit Element Model
There are some limitations of using lumped circuit elementmodel
heavily depends on the inductance calculations
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 52: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/52.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Review of previous studiesProblem definitionOur work
Limitation of Lumped Circuit Element Model
There are some limitations of using lumped circuit elementmodel in the capacitance and resonant modes calculations:
heavily depends on the inductance calculations
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 53: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/53.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Review of previous studiesProblem definitionOur work
Limitation of Lumped Circuit Element Model
There are some limitations of using lumped circuit elementmodel in the capacitance and resonant modes calculations:
heavily depends on the inductance calculations
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 54: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/54.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Review of previous studiesProblem definitionOur work
Limitation of Lumped Circuit Element Model
There are some limitations of using lumped circuit elementmodel in the capacitance and resonant modes calculations:
heavily depends on the inductance calculations which aremade under the quasi-static assumption
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 55: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/55.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Review of previous studiesProblem definitionOur work
Limitation of Lumped Circuit Element Model
There are some limitations of using lumped circuit elementmodel in the capacitance and resonant modes calculations:
heavily depends on the inductance calculations which aremade under the quasi-static assumption
Example: L = 0.002l[
ln(
2lB
)
+ 0.5]
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 56: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/56.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Review of previous studiesProblem definitionOur work
Limitation of Lumped Circuit Element Model
There are some limitations of using lumped circuit elementmodel in the capacitance and resonant modes calculations:
heavily depends on the inductance calculations which aremade under the quasi-static assumption
Example: L = 0.002l[
ln(
2lB
)
+ 0.5]
frequency ↑
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 57: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/57.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Review of previous studiesProblem definitionOur work
Limitation of Lumped Circuit Element Model
There are some limitations of using lumped circuit elementmodel in the capacitance and resonant modes calculations:
heavily depends on the inductance calculations which aremade under the quasi-static assumption
Example: L = 0.002l[
ln(
2lB
)
+ 0.5]
frequency ↑ error ↑
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 58: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/58.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Review of previous studiesProblem definitionOur work
Modelling a Transmission Line as a Lumped CircuitElement
Deutsch et al., 1997There is an important criterion
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 59: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/59.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Review of previous studiesProblem definitionOur work
Modelling a Transmission Line as a Lumped CircuitElement
Deutsch et al., 1997There is an important criterion - used for determining whether awire can be modeled as lumped circuit element or not -
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 60: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/60.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Review of previous studiesProblem definitionOur work
Modelling a Transmission Line as a Lumped CircuitElement
Deutsch et al., 1997There is an important criterion - used for determining whether awire can be modeled as lumped circuit element or not - which isgiven as
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 61: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/61.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Review of previous studiesProblem definitionOur work
Modelling a Transmission Line as a Lumped CircuitElement
Deutsch et al., 1997There is an important criterion - used for determining whether awire can be modeled as lumped circuit element or not - which isgiven as
length of wire ≤λ
20where λ is the wavelength.
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 62: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/62.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Review of previous studiesProblem definitionOur work
Outline1 Introduction
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
2 MotivationReview of previous studiesProblem definitionOur work
3 MethodsFEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
4 Experimental Results5 Conclusion
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 63: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/63.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Review of previous studiesProblem definitionOur work
What Have We Done in this Study?
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 64: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/64.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Review of previous studiesProblem definitionOur work
What Have We Done in this Study?
We have first developed FEM models of low-pass andhigh-pass birdcage coils in COMSOL Multiphysics.
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 65: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/65.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Review of previous studiesProblem definitionOur work
What Have We Done in this Study?
We have first developed FEM models of low-pass andhigh-pass birdcage coils in COMSOL Multiphysics.
Using these models;
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 66: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/66.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Review of previous studiesProblem definitionOur work
What Have We Done in this Study?
We have first developed FEM models of low-pass andhigh-pass birdcage coils in COMSOL Multiphysics.
Using these models;
Two FEM based simulation methods
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 67: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/67.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Review of previous studiesProblem definitionOur work
What Have We Done in this Study?
We have first developed FEM models of low-pass andhigh-pass birdcage coils in COMSOL Multiphysics.
Using these models;
Two FEM based simulation methods
Frequency Domain Analysis
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 68: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/68.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Review of previous studiesProblem definitionOur work
What Have We Done in this Study?
We have first developed FEM models of low-pass andhigh-pass birdcage coils in COMSOL Multiphysics.
Using these models;
Two FEM based simulation methods
Frequency Domain AnalysisEigenfrequency Analysis
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 69: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/69.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Review of previous studiesProblem definitionOur work
What Have We Done in this Study?
We have first developed FEM models of low-pass andhigh-pass birdcage coils in COMSOL Multiphysics.
Using these models;
Two FEM based simulation methods
Frequency Domain AnalysisEigenfrequency Analysis
Software Tool
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 70: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/70.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Review of previous studiesProblem definitionOur work
What Have We Done in this Study?
We have first developed FEM models of low-pass andhigh-pass birdcage coils in COMSOL Multiphysics.
Using these models;
Two FEM based simulation methods
Frequency Domain AnalysisEigenfrequency Analysis
Software Tool
FEM-FDA-EFAT
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 71: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/71.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Review of previous studiesProblem definitionOur work
What Have We Done in this Study?
We have first developed FEM models of low-pass andhigh-pass birdcage coils in COMSOL Multiphysics.
Using these models;
Two FEM based simulation methods
Frequency Domain AnalysisEigenfrequency Analysis
Software Tool
FEM-FDA-EFAT
A handmade low-pass birdcage coil is constructed.
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 72: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/72.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Outline1 Introduction
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
2 MotivationReview of previous studiesProblem definitionOur work
3 MethodsFEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
4 Experimental Results5 Conclusion
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 73: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/73.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Outline1 Introduction
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
2 MotivationReview of previous studiesProblem definitionOur work
3 MethodsFEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
4 Experimental Results5 Conclusion
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 74: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/74.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Geometry
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 75: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/75.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Geometry
low-pass and high-pass birdcage coils are geometricallymodeled in the simulation environment
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 76: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/76.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Geometry
low-pass and high-pass birdcage coils are geometricallymodeled in the simulation environment
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 77: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/77.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Adding Physics
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 78: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/78.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Adding Physics
Radio Frequency Branch → Electromagnetic WavesInterface
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 79: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/79.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Adding Physics
Radio Frequency Branch → Electromagnetic WavesInterface
solves the electromagnetic wave equation for the timeharmonic and eigenfrequency problem
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 80: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/80.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Adding Physics
Radio Frequency Branch → Electromagnetic WavesInterface
solves the electromagnetic wave equation for the timeharmonic and eigenfrequency problem
∇× µ−1r (∇× E)− k2
0
(
ǫr −jσωǫ0
)
E = 0
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 81: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/81.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Boundary Conditions
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 82: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/82.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Boundary Conditions
boundaries of rungs, end rings, capacitor plates and RFshield are assigned to Perfect Electric Conductor (PEC)
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 83: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/83.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Boundary Conditions
boundaries of rungs, end rings, capacitor plates and RFshield are assigned to Perfect Electric Conductor (PEC)
n × E = 0
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 84: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/84.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Boundary Conditions
boundaries of rungs, end rings, capacitor plates and RFshield are assigned to Perfect Electric Conductor (PEC)
n × E = 0
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 85: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/85.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Boundary Conditions
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 86: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/86.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Boundary Conditions
we need to prevent reflections from the outer boundary ofthe solution domain
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 87: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/87.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Boundary Conditions
we need to prevent reflections from the outer boundary ofthe solution domainscattering boundary condition → for boundaries
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 88: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/88.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Boundary Conditions
we need to prevent reflections from the outer boundary ofthe solution domainscattering boundary condition → for boundariesperfectly matched layer → for domain
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 89: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/89.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Boundary Conditions
we need to prevent reflections from the outer boundary ofthe solution domainscattering boundary condition → for boundariesperfectly matched layer → for domain
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 90: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/90.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Boundary Conditions
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 91: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/91.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Boundary Conditions
In frequency domain analysis, lumped port boundarycondition is used for voltage excitation (Zport =
VportIport
)
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 92: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/92.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Boundary Conditions
In frequency domain analysis, lumped port boundarycondition is used for voltage excitation (Zport =
VportIport
)
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 93: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/93.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Boundary Conditions
In frequency domain analysis, lumped port boundarycondition is used for voltage excitation (Zport =
VportIport
)
In eigenfrequency analysis, no source is appliedNecip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 94: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/94.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Mesh
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 95: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/95.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Mesh
(Element Size) <<λ5
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 96: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/96.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Mesh
(Element Size) <<λ5
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 97: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/97.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Outline1 Introduction
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
2 MotivationReview of previous studiesProblem definitionOur work
3 MethodsFEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
4 Experimental Results5 Conclusion
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 98: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/98.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation of a Birdcage Coil
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 99: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/99.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation of a Birdcage Coil
solves for the electromagnetic fields in the solution domain
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 100: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/100.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation of a Birdcage Coil
solves for the electromagnetic fields in the solution domain
at the desired frequency (or frequencies)
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 101: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/101.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation of a Birdcage Coil
solves for the electromagnetic fields in the solution domain
at the desired frequency (or frequencies)
for the specified capacitance value
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 102: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/102.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation of a Birdcage Coil
solves for the electromagnetic fields in the solution domain
at the desired frequency (or frequencies)
for the specified capacitance value
In Frequency Domain Analysis;
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 103: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/103.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation of a Birdcage Coil
solves for the electromagnetic fields in the solution domain
at the desired frequency (or frequencies)
for the specified capacitance value
In Frequency Domain Analysis;
loaded (or unloaded) birdcage coils
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 104: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/104.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation of a Birdcage Coil
solves for the electromagnetic fields in the solution domain
at the desired frequency (or frequencies)
for the specified capacitance value
In Frequency Domain Analysis;
loaded (or unloaded) birdcage coils
shielded (or unshielded) birdcage coils
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 105: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/105.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation of a Birdcage Coil
solves for the electromagnetic fields in the solution domain
at the desired frequency (or frequencies)
for the specified capacitance value
In Frequency Domain Analysis;
loaded (or unloaded) birdcage coils
shielded (or unshielded) birdcage coils
linear or quadrature excitation
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 106: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/106.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 107: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/107.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results
three different scenarios;
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 108: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/108.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results
three different scenarios;
unloaded and unshielded 8-leg low-pass birdcage coil
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 109: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/109.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results
three different scenarios;
unloaded and unshielded 8-leg low-pass birdcage coil
unloaded and shielded 8-leg low-pass birdcage coil
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 110: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/110.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results
three different scenarios;
unloaded and unshielded 8-leg low-pass birdcage coil
unloaded and shielded 8-leg low-pass birdcage coil
loaded and shielded 16-leg high-pass birdcage coil
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 111: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/111.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results
three different scenarios;
unloaded and unshielded 8-leg low-pass birdcage coil
unloaded and shielded 8-leg low-pass birdcage coil
loaded and shielded 16-leg high-pass birdcage coil
electromagnetic field distributions
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 112: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/112.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results
three different scenarios;
unloaded and unshielded 8-leg low-pass birdcage coil
unloaded and shielded 8-leg low-pass birdcage coil
loaded and shielded 16-leg high-pass birdcage coil
electromagnetic field distributions
H+ and H−
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 113: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/113.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results
three different scenarios;
unloaded and unshielded 8-leg low-pass birdcage coil
unloaded and shielded 8-leg low-pass birdcage coil
loaded and shielded 16-leg high-pass birdcage coil
electromagnetic field distributions
H+ and H−
H+ =Hx + iHy
2H− =
(Hx − iHy )∗
2
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 114: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/114.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results
three different scenarios;
unloaded and unshielded 8-leg low-pass birdcage coil
unloaded and shielded 8-leg low-pass birdcage coil
loaded and shielded 16-leg high-pass birdcage coil
electromagnetic field distributions
H+ and H−
H+ =Hx + iHy
2H− =
(Hx − iHy )∗
2
E-field
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 115: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/115.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results - 1st ScenarioUnloaded and Unshielded 8-leg Low-pass BC
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 116: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/116.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results - 1st ScenarioUnloaded and Unshielded 8-leg Low-pass BC
H+ and H− → for linear excitation
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 117: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/117.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results - 1st ScenarioUnloaded and Unshielded 8-leg Low-pass BC
H+ and H− → for linear excitation
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 118: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/118.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results - 1st ScenarioUnloaded and Unshielded 8-leg Low-pass BC
H+ and H− → for quadrature excitation
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 119: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/119.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results - 1st ScenarioUnloaded and Unshielded 8-leg Low-pass BC
H+ and H− → for quadrature excitation
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 120: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/120.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results - 1st ScenarioUnloaded and Unshielded 8-leg Low-pass BC
Electric field → for linear and quadrature excitation
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 121: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/121.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results - 1st ScenarioUnloaded and Unshielded 8-leg Low-pass BC
Electric field → for linear and quadrature excitation
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 122: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/122.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results - 1st ScenarioUnloaded and Unshielded 8-leg Low-pass BC
H+ uniformity → for quadrature excitation
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 123: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/123.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results - 1st ScenarioUnloaded and Unshielded 8-leg Low-pass BC
H+ uniformity → for quadrature excitation
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 124: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/124.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results - 2nd ScenarioUnloaded and Shielded 8-leg Low-pass BC
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 125: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/125.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results - 2nd ScenarioUnloaded and Shielded 8-leg Low-pass BC
H+ uniformity → for quadrature excitation
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 126: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/126.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results - 2nd ScenarioUnloaded and Shielded 8-leg Low-pass BC
H+ uniformity → for quadrature excitation
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 127: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/127.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results - 3rd ScenarioLoaded and Shielded 16-leg High-pass BC
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 128: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/128.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results - 3rd ScenarioLoaded and Shielded 16-leg High-pass BC
Geometric model
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 129: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/129.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results - 3rd ScenarioLoaded and Shielded 16-leg High-pass BC
H+ → for unloaded and loaded case (quadrature excitation)
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 130: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/130.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results - 3rd ScenarioLoaded and Shielded 16-leg High-pass BC
H+ → for unloaded and loaded case (quadrature excitation)
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 131: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/131.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results - 3rd ScenarioLoaded and Shielded 16-leg High-pass BC
H− → for unloaded and loaded case (quadrature excitation)
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 132: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/132.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results - 3rd ScenarioLoaded and Shielded 16-leg High-pass BC
H− → for unloaded and loaded case (quadrature excitation)
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 133: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/133.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results - 3rd ScenarioLoaded and Shielded 16-leg High-pass BC
SAR distribution of an object
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 134: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/134.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results - 3rd ScenarioLoaded and Shielded 16-leg High-pass BC
SAR distribution of an object
SAR =σ|E|2
ρ
σ: conductivity, ρ: density
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 135: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/135.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results - 3rd ScenarioLoaded and Shielded 16-leg High-pass BC
SAR distribution of an object
SAR =σ|E|2
ρ
σ: conductivity, ρ: density
Normalized SAR distribution → for quadrature excitation
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 136: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/136.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results - 3rd ScenarioLoaded and Shielded 16-leg High-pass BC
Normalized SAR distribution → for quadrature excitation
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 137: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/137.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Outline1 Introduction
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
2 MotivationReview of previous studiesProblem definitionOur work
3 MethodsFEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
4 Experimental Results5 Conclusion
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 138: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/138.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Resonant Mode Analysis of a Birdcage Coil
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 139: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/139.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Resonant Mode Analysis of a Birdcage Coil
calculates the resonant modes of the birdcage coil
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 140: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/140.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Resonant Mode Analysis of a Birdcage Coil
calculates the resonant modes of the birdcage coil and theelectromagnetic field distributions at these resonantmodes
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 141: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/141.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Resonant Mode Analysis of a Birdcage Coil
calculates the resonant modes of the birdcage coil and theelectromagnetic field distributions at these resonantmodes for the given capacitance value
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 142: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/142.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Eigenfrequency Analysis in COMSOL Multiphysics
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 143: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/143.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Eigenfrequency Analysis in COMSOL Multiphysics
use developed FEM models of birdcage coils
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 144: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/144.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Eigenfrequency Analysis in COMSOL Multiphysics
use developed FEM models of birdcage coils
add eigenfrequency study
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 145: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/145.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Eigenfrequency Analysis in COMSOL Multiphysics
use developed FEM models of birdcage coils
add eigenfrequency studyspecify number of eigenfrequencies
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 146: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/146.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Eigenfrequency Analysis in COMSOL Multiphysics
use developed FEM models of birdcage coils
add eigenfrequency studyspecify number of eigenfrequenciesspecify a frequency point
add eigenvalue solver
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 147: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/147.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Eigenfrequency Analysis in COMSOL Multiphysics
use developed FEM models of birdcage coils
add eigenfrequency studyspecify number of eigenfrequenciesspecify a frequency point
add eigenvalue solverchange the linearization point (if necessary)
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 148: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/148.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 149: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/149.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results
two different scenarios;
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 150: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/150.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results
two different scenarios;
unloaded and unshielded 8-leg low-pass birdcage coil
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 151: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/151.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results
two different scenarios;
unloaded and unshielded 8-leg low-pass birdcage coil
unloaded and shielded 16-leg high-pass birdcage coil
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 152: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/152.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results
two different scenarios;
unloaded and unshielded 8-leg low-pass birdcage coil
unloaded and shielded 16-leg high-pass birdcage coil
observed electromagnetic variables
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 153: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/153.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results
two different scenarios;
unloaded and unshielded 8-leg low-pass birdcage coil
unloaded and shielded 16-leg high-pass birdcage coil
observed electromagnetic variables
H+ at these resonant modes
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 154: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/154.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results
two different scenarios;
unloaded and unshielded 8-leg low-pass birdcage coil
unloaded and shielded 16-leg high-pass birdcage coil
observed electromagnetic variables
H+ at these resonant modes
surface current density
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 155: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/155.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results - 1st ScenarioUnloaded and Unshielded 8-leg Low-pass BC
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 156: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/156.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results - 1st ScenarioUnloaded and Unshielded 8-leg Low-pass BC
H+ → for all resonant modes
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 157: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/157.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results - 1st ScenarioUnloaded and Unshielded 8-leg Low-pass BC
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 158: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/158.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results - 2nd ScenarioUnloaded and shielded 16-leg High-pass BC
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 159: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/159.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results - 2nd ScenarioUnloaded and shielded 16-leg High-pass BC
H+ and surface current densities → for m=0 mode
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 160: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/160.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Simulation Results - 2nd ScenarioUnloaded and shielded 16-leg High-pass BC
H+ and surface current densities → for m=0 mode
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 161: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/161.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Outline1 Introduction
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
2 MotivationReview of previous studiesProblem definitionOur work
3 MethodsFEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
4 Experimental Results5 Conclusion
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 162: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/162.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Software Tool for Designing and Simulating a BirdcageCoil
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 163: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/163.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Software Tool for Designing and Simulating a BirdcageCoil
PURPOSE:
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 164: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/164.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Software Tool for Designing and Simulating a BirdcageCoil
PURPOSE:
To provide convenience for the coil designers and theresearchers in the field of MRI
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 165: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/165.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Software Tool for Designing and Simulating a BirdcageCoil
PURPOSE:
To provide convenience for the coil designers and theresearchers in the field of MRI to use the proposedsimulation methods easily and according to the parametersthey specify
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 166: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/166.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Software Tool for Designing and Simulating a BirdcageCoil
PURPOSE:
To provide convenience for the coil designers and theresearchers in the field of MRI to use the proposedsimulation methods easily and according to the parametersthey specify
developed software tool
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 167: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/167.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Software Tool for Designing and Simulating a BirdcageCoil
PURPOSE:
To provide convenience for the coil designers and theresearchers in the field of MRI to use the proposedsimulation methods easily and according to the parametersthey specify
developed software tool
FEM based Frequency Domain and EigenfrequencyAnalysis Tool (FEM-FDA-EFAT)
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 168: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/168.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Properties of the sofware tool
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 169: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/169.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Properties of the sofware tool
developed in MATLAB
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 170: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/170.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Properties of the sofware tool
developed in MATLAB
has graphical-user-interface (GUI)
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 171: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/171.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Properties of the sofware tool
developed in MATLAB
has graphical-user-interface (GUI)makes all design and simulation steps according to theuser-specified parameters by connecting to the COMSOLMultiphysics server
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 172: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/172.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Properties of the sofware tool
developed in MATLAB
has graphical-user-interface (GUI)makes all design and simulation steps according to theuser-specified parameters by connecting to the COMSOLMultiphysics server
modeling the coil geometry
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 173: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/173.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Properties of the sofware tool
developed in MATLAB
has graphical-user-interface (GUI)makes all design and simulation steps according to theuser-specified parameters by connecting to the COMSOLMultiphysics server
modeling the coil geometryadding physics and boundary condition
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 174: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/174.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Properties of the sofware tool
developed in MATLAB
has graphical-user-interface (GUI)makes all design and simulation steps according to theuser-specified parameters by connecting to the COMSOLMultiphysics server
modeling the coil geometryadding physics and boundary conditiongenerating mesh for the model
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 175: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/175.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Properties of the sofware tool
developed in MATLAB
has graphical-user-interface (GUI)makes all design and simulation steps according to theuser-specified parameters by connecting to the COMSOLMultiphysics server
modeling the coil geometryadding physics and boundary conditiongenerating mesh for the modeladding study and solver sequence
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 176: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/176.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Properties of the sofware tool
developed in MATLAB
has graphical-user-interface (GUI)makes all design and simulation steps according to theuser-specified parameters by connecting to the COMSOLMultiphysics server
modeling the coil geometryadding physics and boundary conditiongenerating mesh for the modeladding study and solver sequencecomputing the solutions
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 177: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/177.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
Properties of the sofware tool
developed in MATLAB
has graphical-user-interface (GUI)makes all design and simulation steps according to theuser-specified parameters by connecting to the COMSOLMultiphysics server
modeling the coil geometryadding physics and boundary conditiongenerating mesh for the modeladding study and solver sequencecomputing the solutions
when the computation is finished, results can be observedin COMSOL Multiphysics
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 178: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/178.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
FEM-FDA-EFAT
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 179: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/179.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
FEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
FEM-FDA-EFAT
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 180: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/180.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Outline1 Introduction
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
2 MotivationReview of previous studiesProblem definitionOur work
3 MethodsFEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
4 Experimental Results5 Conclusion
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 181: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/181.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Handmade Low-pass Birdcage Coil
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 182: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/182.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Handmade Low-pass Birdcage Coil
8-leg low-pass birdcage coil is constructed on plexiglasstube
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 183: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/183.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Handmade Low-pass Birdcage Coil
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 184: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/184.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Experimental Results and Comparison with NumericalAnalyses
for the resonant modes
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 185: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/185.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Experimental Results and Comparison with NumericalAnalyses
for the resonant modes
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 186: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/186.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Experimental Results and Comparison with NumericalAnalyses
for the resonant modes
S11 of the coil for five different capacitance values
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 187: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/187.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Experimental Results and Comparison with NumericalAnalyses
for the resonant modes
S11 of the coil for five different capacitance valuescompare the measured resonant modes
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 188: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/188.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Experimental Results and Comparison with NumericalAnalyses
for the resonant modes
S11 of the coil for five different capacitance valuescompare the measured resonant modes
Jin’s software tool, MRIEM
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 189: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/189.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Experimental Results and Comparison with NumericalAnalyses
for the resonant modes
S11 of the coil for five different capacitance valuescompare the measured resonant modes
Jin’s software tool, MRIEMOur software tool, FEM-EFAT
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 190: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/190.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Experimental Results and Comparison with NumericalAnalyses
Necip Gurler COMSOL CONFERENCE EUROPE 2012
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IntroductionMotivation
MethodsExperimental Results
Conclusion
Experimental Results and Comparison with NumericalAnalyses
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 192: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/192.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Measured and Calculated Resonant ModesResults for Low-pass Birdcage Coil
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 193: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/193.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Measured and Calculated Resonant ModesResults for Low-pass Birdcage Coil
used capacitance values
47 pF, 10 pF, 3.3 pF, 1.8 pF, 1 pF
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 194: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/194.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Measured and Calculated Resonant ModesResults for Low-pass Birdcage Coil
Results for 47pF
Modes Measured (MHz) MRIEM (MHz) FEM-EFAT (MHz)m=1 60.75 67.46 59.1m=2 85.88 90.64 87.22m=3 93.38 102.2 101.1m=4 102.8 - 105.4
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 195: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/195.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Measured and Calculated Resonant ModesResults for Low-pass Birdcage Coil
Results for 10pF
Modes Measured (MHz) MRIEM (MHz) FEM-EFAT (MHz)m=1 122.11 146.25 124.76m=2 196.48 196.51 184.80m=3 208.54 221.57 214.41m=4 214.97 - 223.54
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 196: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/196.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Measured and Calculated Resonant ModesResults for Low-pass Birdcage Coil
Results for 3.3pF
Modes Measured (MHz) MRIEM (MHz) FEM-EFAT (MHz)m=1 211.3 254.59 205.37m=2 306.3 342.08 306.62m=3 330.0 385.71 356.47m=4 345.0 - 371.75
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 197: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/197.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Measured and Calculated Resonant ModesResults for Low-pass Birdcage Coil
Results for 1.8pF
Modes Measured (MHz) MRIEM (MHz) FEM-EFAT (MHz)m=1 255.2 344.71 260.62m=2 382.0 463.19 392.18m=3 417.0 522.26 456.8m=4 441.5 - 476.5
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 198: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/198.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Measured and Calculated Resonant ModesResults for Low-pass Birdcage Coil
Results for 1pF
Modes Measured (MHz) MRIEM (MHz) FEM-EFAT (MHz)m=1 335.7 462.48 316.85m=2 473.1 621.42 481.6m=3 512.3 700.68 562.24m=4 525.9 - 586.63
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 199: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/199.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Measured and Calculated Resonant ModesResults for Low-pass Birdcage Coil
Percentage error
Error rate (%) = 100 ×
∣
∣
∣
∣
fmeas − fcalc
fmeas
∣
∣
∣
∣
Necip Gurler COMSOL CONFERENCE EUROPE 2012
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IntroductionMotivation
MethodsExperimental Results
Conclusion
Measured and Calculated Resonant ModesResults for Low-pass Birdcage Coil
Percentage error rate for FEM-EFAT and MRIEM
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 201: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/201.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Outline1 Introduction
RF coils in MRIRF birdcage coilsDesign and simulation of RF birdcage coils
2 MotivationReview of previous studiesProblem definitionOur work
3 MethodsFEM Models of Birdcage CoilsFrequency Domain AnalysisEigenfrequency AnalysisSoftware Tool
4 Experimental Results5 Conclusion
Necip Gurler COMSOL CONFERENCE EUROPE 2012
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IntroductionMotivation
MethodsExperimental Results
Conclusion
Conclusion
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 203: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/203.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Conclusion
We have proposed two FEM based simulation methods usingdeveloped FEM models of low-pass and high-passbirdcage coils in COMSOL Multiphysics:
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 204: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/204.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Conclusion
We have proposed two FEM based simulation methods usingdeveloped FEM models of low-pass and high-passbirdcage coils in COMSOL Multiphysics:
Frequency Domain Analysis
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 205: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/205.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Conclusion
We have proposed two FEM based simulation methods usingdeveloped FEM models of low-pass and high-passbirdcage coils in COMSOL Multiphysics:
Frequency Domain Analysiselectromagnetic fields solutions of a birdcage coil for anyscenario
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 206: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/206.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Conclusion
We have proposed two FEM based simulation methods usingdeveloped FEM models of low-pass and high-passbirdcage coils in COMSOL Multiphysics:
Frequency Domain Analysiselectromagnetic fields solutions of a birdcage coil for anyscenario
Eigenfrequency Analysis
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 207: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/207.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Conclusion
We have proposed two FEM based simulation methods usingdeveloped FEM models of low-pass and high-passbirdcage coils in COMSOL Multiphysics:
Frequency Domain Analysiselectromagnetic fields solutions of a birdcage coil for anyscenario
Eigenfrequency Analysisresonant modes of a birdcage coil and electromagnetic fieldsolutions at these resonant modes
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 208: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/208.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Conclusion
Necip Gurler COMSOL CONFERENCE EUROPE 2012
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IntroductionMotivation
MethodsExperimental Results
Conclusion
Conclusion
A software tool is developed to make these two simulationmethods easily and according to the user-specifiedparameters
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 210: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/210.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Conclusion
A software tool is developed to make these two simulationmethods easily and according to the user-specifiedparameters
Experimental results show that results of the proposedsoftware tool is more accurate than the results of softwaretool which uses lumped circuit element model
Necip Gurler COMSOL CONFERENCE EUROPE 2012
![Page 211: FEM Based Design and Simulation Tool for ... - uk.comsol.com€¦ · 11.10.2012 Milan, Italy Necip Gurler COMSOL CONFERENCE EUROPE 2012 ([FHUSWIURPWKH3URFHHGLQJVRIWKH &2062/&RQIHUHQFHLQ0LODQ](https://reader034.vdocument.in/reader034/viewer/2022050606/5fad812887bc4553075c1fd5/html5/thumbnails/211.jpg)
IntroductionMotivation
MethodsExperimental Results
Conclusion
Conclusion
A software tool is developed to make these two simulationmethods easily and according to the user-specifiedparameters
Experimental results show that results of the proposedsoftware tool is more accurate than the results of softwaretool which uses lumped circuit element model
These methods can be adapted to design and simulateother MRI RF coils
Necip Gurler COMSOL CONFERENCE EUROPE 2012
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IntroductionMotivation
MethodsExperimental Results
Conclusion
One more thing...
Necip Gurler COMSOL CONFERENCE EUROPE 2012
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IntroductionMotivation
MethodsExperimental Results
Conclusion
One more thing...
Necip Gurler COMSOL CONFERENCE EUROPE 2012