can you explain a bit more about what you are trying to do? If you extracted ROIs into label files it is just a list of coordinates, although probably not voxel indices. This page (thanks Doug!) explains our various coordinate systems and how to go from one to another:
http://freesurfer.net/fswiki/CoordinateSystems
cheers Bruce
On Sun, 30 Dec 2018, Sadia Sheikh wrote:
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Dear Freesurfer experts I am using freesurfer version 6.0. I have extracted ROI's from the aseg.mgz file. Now is it possible to get the cordinates of each voxel for a particular ROI?
Thanks in advance Regards Research student