Hi Alex, You may use mri_concat with --mean flag, or alternatively use fslmaths to compute the average. Maybe Doug or Bruce or others have better ideas. Hth, Shantanu
On Fri, August 23, 2013 2:56 pm, Alexandra Tanner wrote: > Hi Freesurfers, > > Does anyone know how to make an average activation map of two subjects > without running a group analysis? I have 15 subjects that each have a pre > and a post scan (30 scans total) and we would like to combine the pre and > post bold runs for each subject to generate an averaged AllvFix activation > map for each pair (so I would end up with 1 activation map per subject > pair of the pre and post bold runs averaged together -- 15 maps total). > Originally I tried treating each of my subject pairs as a group and ran > isxconcat-sess and mri_glmfit on each pair (N=2), but because my N was so > small the osgm map looked very strange and wispy. > > Because I'm trying to combine a pre and post scan for the same subject, is > it possible to register the post subject's bold scans to the pre subject > (or vice versa) so that we can treat all the bold runs as one subject and > run selxavg3-sess referencing the pre and post bold runs in the runlist > file? Any clarification or suggestions would be greatly appreciated! > > Thanks, > Alex > > > > > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > > > -- Shantanu Ghosh, Ph.D. Harvard Medical School & Massachusetts General Hospital Martinos Center for Biomedical Imaging _______________________________________________ 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.
