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Dear FreeSurfer, 

I am trying to extract tissue composition of %GM, %WM, and %CSF from a Freesurfer processed brain. I have the coordinates for the voxel but do not know how to place a voxel on the brain in FreeSurfer before running mri_compute_volume_fractions.  Can anyone provide direction on how to do this in FreeSurfer using a Mac running Ventura 13.4.1? 

Thank you, 

Lauren Stephens


Lauren Stephens, MS 

Assistant Clinical Research Coordinator 

Department of Psychiatry and Behavioral Science 

Stanford University School of Medicine  

E: laurenss@stanford.edu 

P: (650)-725-1716