You can look in the gtm.stats file for all the cortical ROIs. Multiply the uptake value by the number of voxels in the ROI and then divide by the sum of the number of voxels across all ROIs. See https://surfer.nmr.mgh.harvard.edu/fswiki/PetSurfer here for the identity of the columns in the  gtm.stats file

On 7/3/2019 3:36 PM, miracle ozzoude wrote:

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Over the cortex. 

On Wed, Jul 3, 2019 at 2:59 PM Greve, Douglas N.,Ph.D. <DGREVE@mgh.harvard.edu> wrote:

The mean over what area? Whole brain or just cortex?

On 7/3/2019 2:15 PM, miracle ozzoude wrote:

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Hello Expert, 

How do i get a single SUVr value for PETsurfer? Similar to Mean_Thickness from Freesurfer, I want to extract a global/Mean SUVr value for each of my subjects. 

Thank you. 

Paul

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