External Email - Use Caution
Hello Nárlon, The caveat we post on the web page for the current 7.X releases at https://secure-web.cisco.com/1SH9723fOHUEJDTPhOh9cxPtQV83D227ju0p39ar6g5zJrD..., mentions longitudinal processing should not be adversely affected when switching to a different OS and/or newer version of freesurfer. Important Note: When processing a group of subjects for your study, 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. While we continue to work to ensure that results match across platforms, there are none-the-less system-level libraries that are OS dependent. An exception to this rule is that you may view and edit files across any platform or version, and run some post-processing tools (outside the recon-all stream) if you check with us first (for instance you may run the longitudinal processing with newer versions). Recon-all output can show differences in the floating point output when the compilers we use change or an existing release is run on a different OS. - R.
On Oct 19, 2022, at 12:42, Boa Sorte Silva, Narlon <narlon.silva@ubc.ca> wrote: External Email - Use Caution Dear FreeSurfer team: I just wanted to confirm the potential issues of upgrading the OS. We are running FreeSurfer 7.1.1 on MacOS 10.4.6 and wanted to upgrade to MacOS 10.15. Our data have been analyzed cross-sectionally and we’ll soon run longitudinal analysis. Would upgrading the MacOS on the same machine and same version of FreeSurfer be detrimental to the analysis results of the same data? In particular, would it bias longitudinal analysis results?Thank you for your helpBest regards,Nárlon CássioNárlon Cássio Boa Sorte Silva PhD (He, Him, His)CIHR and MSHR BC/PARF Postdoctoral Research FellowAging, Mobility, and Cognitive Health LabDjavad Mowafaghian Centre for Brain HealthDepartment of Physical Therapy, Faculty of MedicineUniversity of British ColumbiaVancouver, CanadaTwitter: @BoaNarlon_______________________________________________Freesurfer mailing listFreesurfer@nmr.mgh.harvard.eduhttps://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer