CSAIL Medical Vision Group NAMIC Algorithms

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CSAIL Medical Vision GroupNAMIC Algorithms
NAMIC Dissemination Workshop December 9, 2004
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Learning Shape from Images

• Building quantitative models of natural shapes
  and their variability.
• Creating useful representations and
  visualizations of the learned concepts.

Discriminative Direction Golland 2001
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Study of shape

• Hippocampus shape in schizophrenia

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EM-MF Algorithm
Image
M-Step
Correct Intensities
Bias Predict Error
MF-Step Regularize Weights
Estimate Tissue Probability
E-Step
Label Map

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Segmentation of 31 Structures Pohl 2004
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Segmentation of 31 Structures
Upper Front
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Already in NAMIC Software

• Shape prior for segmentation
• Leventon 2001
• Added to ITK by others
• DTI visualization
• ODonnell (CSAIL), LMI (BWH)
• In VTK-based 3D Slicer