Patrick Teo,
Guillermo Sapiro, and
Brian Wandell*
Imaging Technology Department, HP Labs, and Stanford University*
Summer 1996
Sponsored by the HP Labs Grassroots Basic Research Program
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Title Slide
Properties of the Human Cortex
Structural MRI
Functional MRI
Visualization of fMRI
Gray Matter Segmentation: Goal
Gray Matter Segmentation: Difficulties
Gray Matter Segmentation: Current Techniques
Gray Matter Segmentation: Anatomical Facts
Proposed Solution: Step 1
Proposed Solution: Step 2
Proposed Solution: Step 3
Proposed Solution: Step 4
Step 1: Review: MAP Estimation
Step 1: What is prior probability?
Step 1: Example with uniform prior
Step 1: MAP with structural prior
Step 1: Isotropic vs. anisotropic smoothing
Step 1: MAP with anisotropic smoothing
Step 2: Digital topology: 3D connectivity
Step 2: Flood filling algorithm
Step 3: Cavities and handles
Step 3: Identifying cavities
Step 3: Detecting handles
Step 4: Grow gray matter
Step 4: Gray matter connectivity: Examples
Step 4: Gray matter connectivity: Rules
Step 4: Gray matter connectivity: Exceptions
Step 4: Gray matter distances
Summary of Proposed Solution
Results: Segmentation User Interface
Results: Topology User Interface
Results: Comparison with manual segmentation
Results: Comparison of flattened representation
Acknowledgements