Dear Bruce,
Thank you very much for the help. as you recommended I read the lh.sulc and lh.jacobian_white in Matlab and I have two vectors for each one of them. the vector is for whole left hemisphere ,unfortunately I still did not understand how can I have the values of each vector correspond to parcellation roi's. for example which number sires in each vector related to middle temporal lob or other roi's.
I really appreciated if you make me realize that.
BRG, Nazanin
On Thu, Sep 28, 2017 at 6:03 PM, Bruce Fischl fischl@nmr.mgh.harvard.edu wrote:
Hi Nazanin
- 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.
- 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
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