Dear FreeSurfer Team,

I want to morph a subject's VolumeSourceEstimate to an average subject.

Is there a method to create a volume/voxel-based warp map and read/use it in mne-python ? If that is possible it would solve all my problems.

Since there is a surface-based registration file (?h.sphere.reg) for all subjects to an average subject, it could be useful for me if there is a similar voxel-based registration file (?h.volume.reg).

Or is there another common way for creating a volume-based morphing/warping map from subject to average which can be used in e.g. mne-python?

My status quo:

I have VolumeSourceEstimates for a group of subjects and try to run a statistical test. I have to morph them all on a average brain to get a reasonable comparison.

I hope it became clearer, what I am trying to do.

Sincerely yours,

Daniel van de Velden

On 04.10.2017 15:32, Douglas Greve wrote:

I don't really understand what you are trying to do. But if you're using mne, then it might be best to talk to them

On 10/4/17 3:34 AM, Daniel van de Velden wrote:

...

Dear Freesurfer Team,

I am using your reconstruction pipeline for my study. Since I need to               morph all my subjects to an average subject (using mne-python for this)               for upcoming a Volume Source Analysis I deeply looked into  the whole               source-code of both software packages. Narowing down the problem, I               think I will need a volume version of the ?h-sphere.reg files, which are               created during the whole reconstruction process.               Mne-python reads the subject specific 'sphere_tris' from this file.

I can use the talairach.m3z, which is a nonlinear atlas warp. Or                I can run CVS, which extends the surface warp into the volume.

But how is it possible to read the warp map I got, e.g. CVS-based warp map, and use its information  ?

Yours sincerely,                   Daniel van de Velden

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