Once you have the vertex number, you can get the MNI coordinate through some combination of operations shown on this page
https://surfer.nmr.mgh.harvard.edu/fswiki/CoordinateSystems
Getting the minimum vertex is a little trickier. I would probably load the thickness into matlab, eg,
thickness = MRIread('lh.thickness.mgz'); % you can convert it to mgz with mri_convert lh.thickness lh.thickness.mgz
Then load in the annot, eg,
[vertices label ctab] = read_annotation('lh.aparc.annot')
Then finding the minimum vertex in your ROI

On 9/12/2022 12:52 PM, Olga Kepinska wrote:

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Dear Experts,
I am looking for a way to extract information on the location (xyz coordinates in MNI space) of a vertex with the lowest thickness value within an ROI (label) for a group of subjects.

I have previously ran recon-all and qcache on the data.

Any insights will be welcome!

Thank you in advance and kind regards,

Olga Kepinska

--
Olga Kepinska, PhD 

she/her
Postdoctoral Researcher
Brain and Language Lab (MailScanner has detected a possible fraud attempt from "secure-web.cisco.com" claiming to be http://www.brainandlanguagelab.org)
University of Vienna
@olgakepinska
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