DEar FS experts, I need to extract the CTh from my whole data (90 subjects) based on generated ROI from Qdec(mc-z.neg.th13.sig.ocn.mgh). Would you please advise if I can do it in the same way you have mentioned in this post : http://www.mail-archive.com/freesurfer@nmr.mgh.harvard.edu/msg22973.html