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Segmentation and Visualization of Intervertebral Discs
Preliminary Presentation
Eyal Bar-KochbaENGN2500: Medical Imaging
April 12th, 2011
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The Roadmap To Intervertebral Disc Segmentation
Deadline GoalsFirst
Presentation• Gather data from literature and class MR data.• Begin developing the algorithm for 2D segmentation of intervertebral discs.
Mid Presentation
• Continue working on the algorithm for 2D segmentation of intervertebral discs. • Obtain oblique MRI images from Doug.
Final Presentation
• Finalize the 2D segmentation algorithm and compare it to hand drawn segmentations.• Construct a 3D isosurface by stacking the 2D segmentations and compare to V3D software.
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A Primer On Intervertebral Discs
Anatomy of the Spine
T2-weighted MR sagittal image
● Normal Disc
● Degenerated intervertebral disc with disc herniation
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Why Segmentation Is Not So Simple.
Zoomed T2-weighted MR sagittal image
Segmentation issues: ♦ Gray-level overlapping of the nucleus
pulposus and vertebrae with gray-level overlapping.
● Gray-level overlapping of the annulus fibrosus, anterior longitudinal ligament, and vascular tissue.
▲ Blurring due to the partial volume effect.
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Segmentation Using Atlas-FCM
Segmentation method proposed by S.K. Michopoulou, et al. (2008)
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Segmentation Using Atlas-FCM
Segmentation examples using Atlas-FCM [S.K. Michopoulou, et al. (2008)]
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3D Reconstruction of Segmented Images
• Assign unique values to images outside of boundary.
• Import data into tecplot and plot isosurface.
• Compare data with segmentation produced by V3D.
Samples of V3D Visualization [H. Peng, et al. (2011)]