Hi Boris 1. That's fine. 2. The surface area of fsaverage is less than any individual, so you *definitely* don't want to use it. You should map the ROI back to individuals and compute it in the native space.
cheers Bruce On Wed, 11 May 2011, Boris Bernhardt wrote: > Hello Freesurfer-experts, > > I just analyzed some FreeSurfer cortical thickness data that have been > surface-resampled to fsaverage (using mris_surf2surf with -s fsaverage). > > For the visualization and reporting of my findings, I have a two questions: > > 1. Is there anything that conceptually speaks against showing my results on > non-inflated surfaces of fsaverage, such as the white matter surface, the > pial surface, or even a mid-surface model? > > 2. I have a couple of ROIs defined on the surface of fsaverage and want to report the surface area of a given ROI in mm^2. Should I calculate the area of a ROI directly from the given surface of fsaverage, or to take the area computations from ?h.pial.avg.area.mgh/?h.white.avg.area.mgh which represent the averages of the individuals that went into fsaverage. > > I am asking because I was slightly unclear of the wiki-instructions: > https://surfer.nmr.mgh.harvard.edu/fswiki/GroupAverageSurface > suggests to use ?h.pial.avg.area.mgh; > > on the other hand, the more recently edited > http://surfer.nmr.mgh.harvard.edu/fswiki/FsAverage > says that "The surface area of the new average subject (fsaverage) is that of > a typical subject" > > I am using freesurfer 4.5.0. > > Hope my questions make sense and thank you very much for answering them, > Boris > > > > > --- > Boris Bernhardt, PhD > Max Planck Institute for Human Cognitive and Brain Sciences > Stephanstr. 1a, 04103 Leipzig, Germany > > p: +(49) 341 9940 2658 > e: bernha...@cbs.mpg.de > http://www.cbs.mpg.de/~bernhardt > > _______________________________________________ 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.
