[Freesurfer] PET surfer

Hi Dr Greve,

I have PET data for two groups and I used PET surfer in FSV 6.0 to run the analyses. The pipeline is straightforward and the analysis ran smoothly without any issues.

Is it correct procedure to adjust PET signal to differences in gray matter volume or cortical thinness between two groups?

In other words, is it correct if gray matter volume or cortical thickness for subjects be included as EVs in GLM or a nausiance factor in QDEC?

Specifically, is the PET signal changeable depending on differences in cortical thickness. or differences in gray matter volume?

Thank you for any clarification

Thank you ! Jon