I want to extract cortical thickness values at an MNI coordinate for several subjects.
I have run recon-all for all subjects.
I open T1.mgz and lh.pial in Freeview. For lh.pial, I add the lh.thickness file in overlay. In the Cursor panel, I enter the MNI coordinates I want and Freeview displays a value for cortical thickness.
I would like to know if this is the real value of cortical thickness in this specific region (or vertex) and how it’s calculated (average of the distance between CFS/GM interface and GM/WM interface, and GM/WM interface and CFS/GM interface).
Thank you very much for your help.