External Email - Use Caution
Ah, that makes sense. Short of calculating a Euclidean distance between every
surface RAS and my point I'd like on the surface, then grabbing the one with
the shortest distance, is there a function/utility in FreeSurfer that will
generate the closest vertex for me?
________________________________
From: freesurfer-boun...@nmr.mgh.harvard.edu
<freesurfer-boun...@nmr.mgh.harvard.edu> on behalf of Ehsan Tadayon
<ehsan.tadayo...@gmail.com>
Sent: Tuesday, September 4, 2018 2:05:05 PM
To: Freesurfer support list
Subject: Re: [Freesurfer] [External] Re: SurfaceRAS to Vertex coordinate system
External Email - Use Caution
There is no linear transformation between the two. Vertex coordinate is equal
to surfaceRAS when the point that you have selected is actually one of the
vertices on the chosen surface. However, if the point is not on the surface, it
finds the nearest vertex. So, you can read your surface ( in matlab :
[vertices, faces] = read_surf('lh.pial') ) and then find the vertex that is
closest to your selected point (surfaceRAS). This is the vertex that you see in
the Freeview.
Ehsan.
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