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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