Do you mean you want abs(subj1-matched1)? There's no parametric way to test a hypothesis based on this, but if you want it you can run
mri_concat --abs paireddiff.mgh abspaireddiff.mgh doug Mayuresh wrote: > Hi Doug, Nick and other freesurfer users, > > I have two groups and each group has a matched pair of subjects. I am keen on > identifying cortical areas where the difference between the matched pair in > group1 is greater than that in group2. > How can I do this in freesurfer? > >From the email archive it seems to me that -paired-diff option with > >mris_preproc should do the trick, however as I understand this will create > >difference maps such that subject1-matchedsubject2. For my purpose I would > >be needing the absolute difference between the pairs. How can I acheive this? > > Thanks for any pointers, > Mayuresh > > > > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > > > -- 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 _______________________________________________ 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.
