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Hi,
When I examined the 18 tracts of /dpath results, a few subjects were found missing one tract but differently, for example, fmajor were missing for one subject and the other one was missing lh.slfp and rh.slfp. I was thinking could it be that AP-PA was flipped. Attached screenshots of dtifit_FA.nii, aparc+seg_mask.nii, and bvec. Can you provide some information about the flip so that I can examine it for the rest of the subjects?
Best, Qi
freesurfer@nmr.mgh.harvard.edu