Hi Frank, check out our coordinate systems page http://www.freesurfer.net/fswiki/CoordinateSystems doug
Frank Leone wrote:
Dear all,
I wrote my own function to show the 3D surfaces in Matlab, works splendidly. I now however want to be able to point out Tailarach/MNI coordinates on the 3D surface. I however only have the x, y, z format that is saved in the asc files, which is just where a certex is located in space, with no relation to the original brain whatsoever. The only thing I can retrieve is the vertex index (because that's in the asc file).
How can convert the 3D X, Y, Z values (the same values you get in the console if you click on a point on the surface in tksurfer) to either Vertex RAS/Talairach or Volume index? I read the information on conversions between surface Talairach and Volume Index, that works, but this case is different: I am actually referring to the 3D locations of the vertices. Hopefully someone can help me, thanks a lot in advance,
best, Frank
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