[Freesurfer] Calculating group-wise Dice Similarity Coefficient and corresponding surface map

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Hello experts,

I apologize if this has been asked before- but I couldn't find a question that was similar to what I wanted to know about so I decided to ask this question(s).

I am trying to calculate dice similarity coefficient (DSC) for a group of subjects and I was wondering if it is possible to calculate this on FreeSurfer.

I understand that FreeSurfer has mri_compute_overlap that can compute dice coefficient but I wasn't sure if this can be done on group-level. Do I have to first calculate dice for each subject and then calculate the average dice for the subjects?

Also I was wondering if there is a way to visualize group-level dice coefficient map on inflated lh/rh surface.

Best, Julia Shin