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Hi there

I have a bunch of labels on individual subjects and would like to register them to an average surface that we have created here at the MNI. So, this average has not gone through recon-all and there are no freesurfer recon-all files associated with it. There is no volume associated with it to run in recon-all.

According to the instructions for mri_surf2surf I need the sphere.reg file, which is generated during recon-all. I wonder if there is a way to undergo surface registration in my situation? I found the following documentation, but this seems to be for creating a new average. I have the average already.

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SurfaceRegAndTemplates - Free Surfer Wiki

The output from registration is yet another version of the subject's surface mesh, typically named ?h.sphere.reg, with the x,y,z vertex positions still on a sphere, but warped so that the subject's curvature pattern best aligns with the template data.Here is the same convexity data, now plotted on the lh.sphere.reg surface. Similar pattern, but "stretched around".

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Thank you,

Trisanna

Trisanna Sprung-Much, PhD

Research Associate

McGill University

Montreal Neurological Institute