Hi Octavian

I'm not clear what you are asking. If recon-all completed, then the pial surface is already registered to fsaverage via the ?h.sphere.reg surface and you should be able to use mri_surf2surf to transfer the label into a common space. Bruce

On Mon, 1 Oct 2012, octavian lie wrote:

Dear all,   I need to mark the cortical extent of a lesion (intersection of the lesion and pial surface, where "lesion" represent a epilepsy related resection). After the pial labeling of the resection, I need to register the labeled surface to the fsaverage. I completed recon-all routine on the postop T1, and went nicely, corrected pial surface in a few places. Question: what is the best way to mark the pial extent of a resection? Is there a way to accurately register the lesioned pia to the fsaverage, potentially by masking the resection ROI? Thank you for your insight,   Octavian.