june 28-29, 2005ihe interoperability workshop 1 integrating the healthcare enterprise consistent...
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June 28-29, 2005 IHE Interoperability Workshop1
Integrating the Healthcare EnterpriseIntegrating the Healthcare Enterprise
Consistent Presentation of ImagesConsistent Presentation of Images
Ellie AvrahamEllie AvrahamKodak Health GroupKodak Health Group
IHE Planning andIHE Planning and Technical CommitteesTechnical Committees
June 28-29, 2005 IHE Interoperability Workshop2
The Visual Appearance of grayscale images displayed on different types of softcopy display devices or printed on different types of hardcopy output devices is in general inconsistent and may impact the clinical Diagnostics Reading
Consistent Presentation of Images Consistent Presentation of Images Abstract/Scope: The Grayscale Abstract/Scope: The Grayscale
Consistency ProblemConsistency Problem
June 28-29, 2005 IHE Interoperability Workshop3
Problems of Display InconsistencyProblems of Display Inconsistency
mass visible mass invisible
VOI chosen on one display device
Rendered on another with different display
Mass expected to be seen is no longer seen
Slide Provided by David Clunie
June 28-29, 2005 IHE Interoperability Workshop4
Problems of Inconsistency in Problems of Inconsistency in Display Luminance rangeDisplay Luminance range
0.5
1.5
1.0
3.0
Not all display levelsare perceivable on alldevices
Slide Provided by David Clunie
June 28-29, 2005 IHE Interoperability Workshop5
Problems of Inconsistency in Display Problems of Inconsistency in Display Luminance rangeLuminance range
0.5
1.5
1.0
3.0
Not all display levelsare perceivable on alldevices
Slide Provided by David Clunie
June 28-29, 2005 IHE Interoperability Workshop6
Problems of Hardcopy-Softcopy InconsistencyProblems of Hardcopy-Softcopy Inconsistency
Digital Modality Laser Printer
Printed images don’t looklike displayed images
Slide Provided by David Clunie
June 28-29, 2005 IHE Interoperability Workshop7
Causes of InconsistencyCauses of Inconsistency
1.0 .66
Display devicesvary in the maximumluminance they canproduce
Display CRT Luminance vs. Film Optical Density on a light box is an extreme example
Slide Provided by David Clunie
June 28-29, 2005 IHE Interoperability Workshop8
Consistent Presentation of Images Consistent Presentation of Images Value PropositionValue Proposition
1.Consistent distribution of Images across the healthcare enterprise
- Consistency among Hardcopy Images Printed on different Printers
- Consistency among Softcopy Images view on different Display devices
- Consistency among Hardcopy and Softcopy Image view
2. Maintain and Improve Image Quality
- Calibrating the Display/Print Device
- Use Presentation State for Display and Presentation (P-Val) LUT for Print.
3. Improve Throughput
- Preserve the Display Setup parameters in the Presentation State
- Apply the Presentation State automatically before the Images Display
The cost effective solutionto ensure that image quality is maintained across
different monitors and film producing devices
June 28-29, 2005 IHE Interoperability Workshop9
DISPLAY
Image Archive
Image Manager
Image Display
Image Creator
Present.State
Stored
Q /RPresentation
Sates
ImagesStored
Present.State
Stored
AcquisitionModality
PRINTING
Print Server
Print Request withPresentation LUT
Print Composer
• Consistent Appearance of Images:– Display Devices– Printed Output
Consistent Presentation of ImagesConsistent Presentation of ImagesTransaction DiagramTransaction Diagram
June 28-29, 2005 IHE Interoperability Workshop10
Consistent Presentation of Images Consistent Presentation of Images DICOM Standard UsedDICOM Standard Used::Calibration of the Softcopy Display and the Hardcopy Output Devices using DICOM Grayscale Standard Display Function (GSDF)
Creating Hardcopy Output Using DICOM Basic Print with Presentation LUT (P-LUT) Support
Preserving/Using the Softcopy Display Viewing Parameters in the DICOM Grayscale Softcopy Presentation State (GSPS) container
CalCal
HardHard
SoftSoft
June 28-29, 2005 IHE Interoperability Workshop11
Consistent Presentation of ImagesConsistent Presentation of ImagesStandardizing/Calibrating DeviceStandardizing/Calibrating Device
The DICOM Standard Defines: A standard curve, the Grayscale Standard Display
Function (GSDF), against which different types of display and hardcopy output devices should be calibrated – Adjust their Characteristic Curve to the GSDF curve.
CalCal
Devices Have to Be Properly CalibratedDevices Have to Be Properly Calibrated
June 28-29, 2005 IHE Interoperability Workshop12
Standardizing a Display/Print Standardizing a Display/Print Device to GSDF CurveDevice to GSDF Curve
Slide Provided by David Clunie
CalCal
0.1
1
10
100
0 50 100 150 200 250
DDL or P-Values
Standard
Characteristic Curve
June 28-29, 2005 IHE Interoperability Workshop13
Consistent Presentation of Images Consistent Presentation of Images Images Printed, the DICOM Standard Images Printed, the DICOM Standard
Defines:Defines:
Basic Print Management with Presentation Look Up Table, for controlling the consistent appearance of preformatted images on printed output
HardHard
June 28-29, 2005 IHE Interoperability Workshop14
Basic Print Request with Presentation LUT Basic Print Request with Presentation LUT ActorsActors
PrintComposer
PrintServer
DICOM Film Session N-CREATE
DICOM Film Box N-CREATE
DICOM Image Box N-SET
DICOM Film Box N-ACTION
DICOM Film Session N-ACTION
Print Status (DICOM N-EVENT-REPORT)
DICOM Presentation LUT N-CREATEDICOM Presentation LUT N-CREATEPrint Composer
Print Server
Print Request
Printer StatusHardHard
Print Presentation LUT
June 28-29, 2005 IHE Interoperability Workshop15
Actors:Actors: Basic Print Request with Basic Print Request with Presentation LUTPresentation LUT
• Print Composer – A system that generates DICOM print requests as a DICOM Print SCU.Print composer has to apply image processing manipulations, and requests to Print server will specify P-Values in the form of a Presentation Look-Up Table (Presentation LUT) or implicitly by Presentation LUT Shape.
• Print Server – A system that accepts and processes DICOM print requests as a DICOM Print SCP and performs image rendering on hardcopy media.The system must support pixel rendering to optical density according to the DICOM Grayscale Standard Display Function.
HardHard
June 28-29, 2005 IHE Interoperability Workshop16
Consistent Presentation of Images Consistent Presentation of Images Preserving Display Parameters:Preserving Display Parameters:
Grayscale Softcopy Presentation State (GSPS): an object for storing and communicating the parameters that describe how an image or set of images should be displayed.
A GSPS object contains references to the images it applies to, and the transformations (grayscale transformations, shutter transformation, image annotation, spatial transformations, and displayed area annotation) that should be applied when the images are presented on a softcopy display, or printed on film.
SoftSoft
June 28-29, 2005 IHE Interoperability Workshop17
Consistent Presentation of ImagesConsistent Presentation of ImagesReporting Radiologist Referring Physician or
Reviewing Radiologist
Presentation StatePresentation LUT
Grayscale Standard
Original Image
Window Level
Flip
Zoom
Area Of
Interest
Annotate
WithoutConsistent Presentation
AchievingConsistent Presentation
Area Of
Interest
SoftSoft
June 28-29, 2005 IHE Interoperability Workshop19
Consistent Presentation of ImagesConsistent Presentation of ImagesActors: Grayscale Softcopy Presentation State (GSPS)Actors: Grayscale Softcopy Presentation State (GSPS)
Image Acquisition / Evidence Creator Creates Images with GSPS Objects and Store them on
Image Manager/Image Archive
Image Manager /Image Archive Store and Query & Retrieve Images with GSPS Objects
Image Display Query & Retrieve Images with GSPS Objects and Apply
the GSPS on the Images
June 28-29, 2005 IHE Interoperability Workshop20
Acquire DisplayPrint
Consistent Presentation of ImagesConsistent Presentation of Images
Slide Provided by David Clunie
June 28-29, 2005 IHE Interoperability Workshop21
More information….More information….
IHE Web site: http://www.ihe.nethttp://www.himss.org/IHEhttp://www.rsna.org/IHEhttp://www.acc.org/quality/ihe.htm
Technical Frameworks
Technical Framework Supplements – Trial Implementation
Non-Technical Brochures :
Calls for Participation IHE Fact Sheet and FAQ IHE Integration Profiles: Guidelines for Buyers IHE Connect-a-thon Results Vendor Products Integration Statements
Questions?
Questions?