Holger, you can test how big the average label is with the following commands
cd $SUBJECTS_DIR/averagesubject/label mri_segstats --annot averagesubject lh aparc --sum sum.lh.aparc.dat --i ../surf/lh.white.avg.area.mgh --accumulate mri_segstats --annot averagesubject rh aparc --sum sum.rh.aparc.dat --i ../surf/rh.white.avg.area.mgh --accumulate mri_segstats --annot averagesubject lh aparc.a2009s --sum sum.lh.aparc.a2009s.dat --i ../surf/lh.white.avg.area.mgh --accumulate mri_segstats --annot averagesubject rh aparc.a2009s --sum sum.rh.aparc.a2009s.dat --i ../surf/rh.white.avg.area.mgh --accumulate Look for transversetemporal in the aparc and S_temporal_transverse in the aparc.a2009s The "NVertices" will have the number of vertices in the label The "Mean" column will have the area. This should more-or-less match your ROI results. doug On 04/02/2013 12:42 PM, Klein, Holger wrote: > Dear Freesurfers, > > I averaged 42 subjects with make_average_subject focusing on Heschl's > Gyrus and finally got the image attached (for both atlases (Desikan = > Atlas I, Destrieux = Atlas II). > > Gray matter surface calculations for Heschl's gyrus showed the > following mean values (in mm^2): > Atlas I lh = 439 (SD 60), rh = 323 (SD 46) > Atlas II lh = 340 (SD 70), rh = 253 (SD 47) > > Heschl's gyrus depicted in the attached image looks considerably > larger for Atlas II, but the surface analysis gives me smaller values > for mean surface calculation (Atlas II < Atlas I) > > How can that be explained? > > Thanks in advance > > Holger > > > _______________________________________________ > 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 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.
