Hi Celine

we usually use mris_expand with a negative number to grow the surface inwards. Something like

mris_expand lh.white -1 lh.interior

would move the surfaces inwards by 1mm everywhere and save it in a file name lh.initerior. You could then visualize that in freeview or tkmedit as usual.

cheers Bruce

On Tue, 5 Nov 2013, celine@nmr.mgh.harvard.edu wrote:

Hi Freesurfer team We are sampling diffusion images below the WM surface , and would like to visualize with tkmedit or freeview the surface itself to see if it is appropriate to our analysis (not the surface overlay, but the surface as a line like the one that are on the surfs directory). I couldn't find how to do it but maybe I didn't choose the correct keywords in the archives! Thanks so much for you help! C?line