Dear Freesurfer community,

I am trying to extract SUV values from sub-cortical segmentation or gtmseg I don t want to use any PVC.

I used the following commands:

gtmseg --s xyz

then

mri_coreg --s xyz --mov abetapet.nii.gz --reg abetapet.reg.lta

following

mri_vol2vol --mov abetapet.nii --reg abetapet.reg.lta --targ orig.mgz --o abetapet.sm00.nii.gz

and

mri_segstats --annot xyz lh gtmseg --i abetapet.sm00.nii.gz --sum xyz_abeta.stats

resulting in this dimension mismatch error:

input 256 256 256
seg 416 450 476

Is that the correct way for doing this analysis? any suggestions how to solve the mismatch error?

Thanks,

Boris