You'll have to run mri_vol2surf on each one separately to bring it into the fsaverage space, then mri_concat to stack all of the maps into one file. At that point you can compute a mean (also with mri_concat). Generally, one does not do group analysis on sig maps though. doug
On 11/27/2012 05:08 PM, Alexandra Tanner wrote: > Hi Doug and Freesurfers, > > I recently used mergecontrasts-sess to merge two contrasts of an analysis > in 50 different subjects. The command ran on each subject individually and > created a sig.nii and sig.ovpl file within a merged contrast folder for > each subject. I'd now like to look at an average map of the merged > contrasts across all 50 subjects. > Does anyone know how to go about getting this average map for my group of > 50 subjects? > > Command I ran to get the sig.nii/sig.ovpl file for each subject: > mergecontrasts-sess -mergedcontrast Merge_7vFix_1vFix -conjunction andor > -analysis SIRP_Stable5 -contrast Cond7vFix 3 pos 0 -contrast Cond1vFix 3 > pos 0 -map sig -sf > /cluster/roffman/users/Stable5_PerRun/Subject_Files/50_MTH_Subjects -df > /cluster/roffman/users/Stable5_PerRun > > Any help would be greatly appreciated! > > Thanks, > Alex > > -- Douglas N. Greve, Ph.D. MGH-NMR Center gr...@nmr.mgh.harvard.edu Phone Number: 617-724-2358 Fax: 617-726-7422 Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting FileDrop: www.nmr.mgh.harvard.edu/facility/filedrop/index.html Outgoing: ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/ _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.
