Dear All, I have 2 coregistered MR volume (pre and postresective MRI) sets for several epilepsy patients. I need to extract the resection volume (VOI= pre - postresection volume) as a set of voxel coordinates. Can I do this in freesurfer? Ideally I would avoid manual delineation slice by slice as in MRImicro and if possible I would do it automatically by thresholding, for example. If not, manual is fine if it can be done in FS. Please advise. Thank you, Octavian.