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

_______________________________________________
Freesurfer mailing list
Freesurfer@nmr.mgh.harvard.edu
https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer

The information in this e-mail is intended only for the person to whom it is
addressed. If you believe this e-mail was sent to you in error and the e-mail
contains patient information, please contact the Partners Compliance HelpLine at
http://www.partners.org/complianceline . If the e-mail was sent to you in error
but does not contain patient information, please contact the sender and properly
dispose of the e-mail.