Xiangchuan Chen,
You might want to look at the slides downloadable from the top of this page:
http://surfer.nmr.mgh.harvard.edu/fswiki/FsTutorial
which contain pictures showing the meaning of 'curv' and 'sulc'.
Nick
sulc = "average convexity" from our 1999 reconII paper. Essentially measures the depth/height of each point above the average surface.
curv = smoothed mean curvature.
jacobian_white = the jacobian of the spherical transform. Measures the amount of distortion needed to warp a subject into register with the atlas.
On Mon, 5 Nov 2007, Xiangchuan Chen wrote:
Hi all,
I am using Qdec to examine the anatomical differences between two groups
of subjects. The surface-based measures I can select are thickness, area, area.pial, sulc, curv, and jacobian_white. Could anybody tell me what anatomical features the later three (sulc, curv, and jacobian_white) actually measure? >
Thanks in advance,
Xiangchuan Chen
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer