For visualizing the overlap, I would probably create a segmentation in which each vertex is either 1 (present in thickness), 2 (present in CBF), or 3 present in both. You can do this in matlab or with a combination of mri_binarize and fscalc. You can then create an annotation from the seg with mris_seg2annot. I would compute a dice coefficent of the overlap in matlab, something like
dice = n12/((n1+n2)/2) where n1 is the number of vetices in thick, n2 for cbf, and n12 is the number that overlap doug On 03/16/2015 12:09 PM, Matthieu Vanhoutte wrote: > Dear FreeSurer's experts, > > I used group analysis based on GLM to compute significative surface > maps of different characteristics : thickness, CBF,... > > Now I've got these maps I would like to visualize overlaps between two > different maps and compute the overlap ratio. > > How could I succeed these two steps ? > > Best regards, > > ------------------------------------- > Matthieu Vanhoutte, MSc > Research Engineer - Department of Neuroradiology > Regional University Hospital, Lille, France > > > _______________________________________________ > 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: https://gate.nmr.mgh.harvard.edu/filedrop2 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.
