Dear freesurfer experts,

I have used the mri.vol and mri.analyzehdr.vol fields to encode my coordinates and phase values using MRIread and MRIwrite (f_LH12.mgz).

I then brought these data into freesurfer using the following:

bbregister --s fsaverage --mov /Applications/freesurfer/subjects/fsaverage/mri/f_LH12.mgz --reg register12.dat --bold --init-header —t2

mri_vol2surf --mov /Applications/freesurfer/subjects/fsaverage/mri/f_LH12.mgz --reg /Applications/freesurfer/subjects/fsaverage/surf/register12.dat --hemi lh --surf white --o /Applications/freesurfer/subjects/fsaverage/surf/LH12.mgh

tksurfer fsaverage lh sphere --overlay /Applications/freesurfer/subjects/fsaverage/surf/LH12.mgh

However, I do not see anything on the sphere (or fsaverage for that matter) …

Can you provide any hints?

The phase values are normalized and range from 4 – 5 and I have converted to RAS space properly (I hope) …

Any tips would be a big help!

Best wishes,

Jason.