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Dear Freesurfer Experts, I have two questions that I hope are easy to answer.
1. Would the calculation for E-TIV change if I edited the pial and reran recon-all as in this tutorial below? https://surfer.nmr.mgh.harvard.edu/fswiki/FsTutorial/PialEdits_freeview
My understanding is that E-TIV should not change after minor edits to the pial segmentation, because the transform happens before these edits even happen. We start the at autorecon2-pial for the pial correction, which is after the Talairach transform computation.
2. I have two different windows computers with two VMware workstations running what I thought were the same versions of CentOS. They are both CentOS 6, but one is 6.5 and the other is 6.9. If both VMware workstations run the exact same versions of Freesurfer 6 (freesurfer-Linux-centos6_x86_64-stable-pub-v6.0.0-2beb96c), is it a problem if the CentOS versions are slightly different?
I know the FS wiki says "it is essential to process all your subjects with the same version of FreeSurfer, on the same OS platform and vendor, and for safety, even the same version of the OS.", but would there be enough of a difference between CentOS 6.5 and 6.9 to cause major discrepancies in Freesurfer T1 processing?
Thanks so much, Jeff