Hi Nazanin
1. We don't put maps into stats files as they would be way too big. You can load the sulc into matlab with the read_curv command.
2. This should also be straightforward in matlab. mris_info will give you the total surface area of any surface. Or I think mris_jacobian will do this entire calculation for you
cheers Bruce
On Thu, 28 Sep 2017, N Saf wrote:
Dear FreeSurfer experts, I have 2 questions: 1- I try to measure average convexity for temporal lobe by FreeSurfer, I can see the values for each vertex when I overlay the e.g. lh.sulc in lh.inflated, but I wonder if I can find these values somewhere else like in stats files? 2- Is FreeSurfer compute metric distortion for a specific ROI (e.g. ROIs segmented in parcellation ) according following equation? and if that's the case where can I find these values of metric distortion?
Metric distortion = k ∗ area of a triangle on registered sphere/ area of triangle on original gray/white interface surface
Where k = total surface area of original gray/white interface surface/ total surface area of individual sphere
could you help me to solve the problem, I am looking forward to receive your answer. Thank you for your help.
Best Regards, Nazanin