Dear FS experts:
I am studying the coordinate system in FS. I met a problem that confused me. I run tksurfer: tksurfer fsaverage lh inflated. Then I chose a point on surface. It showed that the Vertex Index is 80321, and the Vertex RAS is (-38.53 9.05 40.01). I thought that the Vertex RAS is just obtained from the lh.inflated file. But I run: mris_info --v 80321 .\fsaverage\surf\lh.inflated. It showed that coordinate is (-18.4 40.8 32.7).
I have no idea that how the Vertex RAS is calculated in Tksurfer. Maybe is there a transform matrix between the two coordinates ? If so, how can i get the transform matrix ?
Best,
Zhiliang
tksurfer will always report the coordinate of the ?h.orig surface
On 04/24/2017 03:35 AM, Zhiliang Long wrote:
Dear FS experts:
I am studying the coordinate system in FS. I met a problem thatconfused me. I run tksurfer: tksurfer fsaverage lh inflated. Then I chose a point on surface. It showed that the Vertex Index is 80321, and the Vertex RAS is (-38.53 9.05 40.01). I thought that the Vertex RAS is just obtained from the lh.inflated file. But I run: mris_info --v 80321 .\fsaverage\surf\lh.inflated. It showed that coordinate is (-18.4 40.8 32.7).
I have no idea that how the Vertex RAS is calculated in Tksurfer. Maybe is there a transform matrix between the two coordinates ? If so, how can i get the transform matrix ?
Best,
Zhiliang
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
freesurfer@nmr.mgh.harvard.edu
-
Douglas N Greve -
Zhiliang Long