Hello PetSurfer and Freesurfer Developers,

I am using PetSurfer to obtain PVC SUVR images . I have already used mri_concat to derive the mean images over three acquisitions (template image).

After gtmseg amd mri_coreg, I want to get the SUVR map with whole cerebellum as the reference (instead of the pons). How could this be done? What can I modify in mri_gtmpvc --i pet.nii.gz --reg template.reg.lta --psf FWHM --seg gtmseg.mgz
 --default-seg-merge  --auto-mask PSF .01 --mgx .01 --o gtmpvc.output to achieve this goal?

Thank you.