[Freesurfer] question about partial volume corrections with PETSurfer

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Dear PetSurfer and Freesurfer Developers,

I would like to run partial volume corrections on amyloid PET images (from ADNI) with PetSurfer.

I have downloaded the amyloid PET images that were intensity normalized to the cerebellar GM.

However, I noticed that the PVC analysis in PetSurfer uses the Pons as a reference region.

I don't have much experience with PET analyses but I was wondering

1.1 If I should use the same reference region for the PVC?

1.2 If so, how can I change the Pons for the Cerebellar GM in the commands on the website?

I found a similar question raised in the forum (https://secure-web.cisco.com/1ZlB3PzPmZnYFpKkL_LMunStJKeDgVzSjzFa3rVWrk5e5OX...) and the provided solution is to add ‘--rescale 7 8 46 47’ for left and right cblum wm and gm.

2.1 Does ‘--rescale 7 8 46 47’ suit my question 1?

2.2 If so, where can I find the whole list of ids that specify every brain region in the left and right hemispheres?

Thank you.

Best,

Yu-Wei

**************************** Yu-Wei Chang 張育瑋 Doctoral student

UNIVERSITY OF GOTHENBURG Department of Physics Gothenburg, Sweden