Hi Nazanin
you can use read_annotation to find the parcellation unit for each vertex
cheers Bruce On Sat, 30 Sep 2017, N Saf wrote:
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
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
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