External Email - Use Caution 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_LMunStJKeDgVzSjzFa3rVWrk5e5OXDg8sn2fECIW_80d1NtvqZ-MkovTawCi5Ch6uXXNSPFsodmBDCzlqAXmixjSWeeB8j5mJwcowB1fFCZ-hNp30G4ggxBUyy-t-bRYq6qZjhVq-Pp68NdB5rW_rqHpJVd-teN4JhrfBtauoGOq1hYOmEuSd5EpeiCbmMMjmIxC1cn-IOZXDrmaTa9EP5q5w9i_r8GjaJ9Psv3EX4a6G-JxFjhLA5wbt78-mptx9YvVA/https%3A%2F%2Fwww.mail-archive.com%2Ffreesurfer%40nmr.mgh.harvard.edu%2Fmsg52918.html) 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
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