I applied to rbv.nii.gz volume to anatomical space.

You said, bbpet2anat.lta. using mri_vol2vol

but I tested. registration using bbpet2anat.lta was not correct on native T1 space.

So I tested rbv2anat.lta for registration. that was okay.

What is difference between SPM coregistration rbv onto orig.mgz and registration using rbv2anat.lta??

Best regards

Soo