Hello Francois,
Thanks for your reply. I will try Cat12. I just have a question related to that.
The description of the cortex in cat 12 is: cortex surface that was generated by CAT. The central surfaces are meshes half-way between the grey-white interface and the external pial surface.
it it equivalent of the mid surface generated by freesurfer ? (average between the pial surface and the gray matter-white matter interface)
Edouard