Dear all,
After studying the freesurferstats2table script for a while, I think I figure out what these surfaces are. Below is my understanding. Please correct me if I am mistaken!
In the aparc_area_lh.txt, the surface area should be one based on the pial surface, not the white surface, because we are talking about cortical area.
In the aparc_meancurv_lh.txt, the mean curvature should be one based on the Gaussian Curvature of the white surface, not the pial surface, because it is how curvature is computed in freesurfer.
Thanks! Daniel -- Daniel Yang, PhD Postdoctoral Researcher Child Study Center Yale University 203-737-5454
From: <Yang>, Daniel Yang <yung-jui.yang@yale.edumailto:yung-jui.yang@yale.edu> Date: Thursday, July 19, 2012 11:51 PM To: "freesurfer@nmr.mgh.harvard.edumailto:freesurfer@nmr.mgh.harvard.edu" <freesurfer@nmr.mgh.harvard.edumailto:freesurfer@nmr.mgh.harvard.edu> Subject: questions about SurfArea and meancurv
Dear Freesurfer,
I am new to freesurfer and have a number of beginner's questions. After recon all the subjects and running the freesurferstats2tablehttp://surfer.nmr.mgh.harvard.edu/fswiki/freesurferstats2table script, I am looking at the two files: aparc_area_lh.txt and aparc_meancurv_lh.txt. Everything goes by default.
My questions are,
1. In the aparc_area_lh.txt, is the surface area based on the pial surface, the white surface, or both? 2. In the aparc_meancurv_lh.txt, is it based on the Gaussian Curvature of the white surface or the pial surface?
I cannot find the relevant documentation in the freesurfer wiki. Any comments are highly appreciated!
Best Regards, Daniel -- Daniel Yang, PhD Postdoctoral Researcher Child Study Center Yale University 203-737-5454