I just noticed this about a week ago and have not been able to track it down. The w file (or anything created by mri_vol2surf, which is run by paint-sess) is the gold standard. When tksurfer loads in a volume/registration, it is slightly off. I'm working on why.
doug
Jesse Friedman wrote:
Hi,
I'm using paint-sess to create .w files from a contrast's sig map (I need the .w files for use with MNE).
When I view the sig.nii file in tksurfer, the activation differs subtly but noticeably from the .w files.
For example, I'll run a command like: paint-sess -analysis EC -contrast eVc -offset 5 -s subjects/RMCON005
When I load RMCON005/bold/EC/eVc/sig-5-lh.w into tksurfer, the activation is slightly different than when I load RMCON005/bold/EC/eVc/sig.nii and view that hemisphere at that offset.
Is this discrepancy to be expected? If so, is there a way to create .w files that have identical activation to the sig.nii file?
-- Jesse Friedman, B.A. Massachusetts General Hospital Martinos Center, Manoach Lab Psychiatric Neuroimaging 149 13th Street #2613 Charlestown, MA 02129 Phone: (617) 726-1908 Fax: (617) 726-4078 jessef@nmr.mgh.harvard.edu _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer