[Freesurfer] Thanks for the answers

Hi Doug and Bruce,

Thanks for your answers. One more question, why the vertex RAS of the same spot on the brain given in TkSurfer is not the ones I read by Matlab program freesurfer_read_surf?

The commands I am using are:

[vertex_coords, faces] = freesurfer_read_surf('tutorial_subjs/subject/ surf/lh.inflated');

tksurfer subject lh inflated

Thanks,

YJ

if you have the voxel index (col, row, slice) then you can:

V2R = [ -1.00000 0.00000 0.00000 128.00000 0.00000 0.00000 1.00000 -128.00000 0.00000 -1.00000 0.00000 128.00000 0.00000 0.00000 0.00000 1.00000 ]

crs = [col row slice]';

xyz = V2R[crs+1; 1];

then find the vertex whose xyz coors are closest to xyz

Yunjie Tong wrote:

Hi freesurfer experts,

I have a single subject anatomical data in freesurfer. If I know the volume index of a point on the surface of the cortex ( from T1.mgz in TkMedit), how can I find out the corresponding vertex index or the vertex RAS in TkSurfer. Thanks. BTW, I am using matlab.

Thanks,

Yunjie _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer