If you've run mri_gtmpvc already, you can add --save-input and it will save a
file called input.rescaled.nii.gz which will be rescaled to your reference
region
On 12/29/2020 4:19 PM, Julie Ottoy wrote:
External Email - Use Caution
Dear Freesurfer team,
I have a question related to petsurfer. On the website, it is stated that "If
you are not using PVC, you can use the template.reg.lta to sample the PET
volume onto the surface using mri_vol2surf, then apply standard surface-based
analysis."
However, I was wondering how to do this for PET data that I first want to
normalize to a reference region (to perform group-wise glm analyses
afterwards). For example, I want to transform the "non-pvc and pons-rescaled
PET volume" to the surface. Is there a way to easily do this? Or should I use
the --scale flag with vol2surf and input the non-pvc reference region value for
each subject reading from the gtm.stats.dat file, which I got from the
mri_gtmpvc with --psf 0 --no-tfe --no-rescale?
Thank you for the help!
Best regards
Julie
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