Dear all, I've been using probabilistic tracking in FSL to identify two tracts. Now I wanted to use deterministic tracking to identify the same tracts to be able to compare my results directly with published results from another group. Can I just run probtrackx again changing the number of samples to 1? Or should I run bedpostx again to just define one direction per voxel (I used the defaults in bedpostx)? Thank you very much. Best regards, Lucia