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Transcript of Diffusion MRI
colored by orientation
gradient directions distributed on a sphere
motion / eddy current distortion correction
diffusion weighted image (DWI)
b-value: length/strength of diffusion-weighting
1. manual fiber tracking in each subject
2. warp fibers with FA to ICBM-FA template
3. sample FA-profile along tract
non-rigid tensor-based registration towards population-averaged template
voxel-based analysis on FA
pathology and diffusion
multimodal analysis (fMRI,sMRI)
non-rigid tensor registration
Ensure that tracks are anatomically valid!
High chance of false positive findings.