Hi Jakob,
that usage is deprecated. To generate the middle surface we currently do (from the surf directory):
mris_expand -t lh.white 0.5 lh.graymid
-t tells it to use the thickness and interpret the amount of expansion (0.5) as a fraction of the thickness.
cheers, Bruce
On Mon, 13 Jul 2009, Jakob Heinzle wrote:
Dear freesurfer experts,
I would like to create (in addition to the pial and white surfaces) the middle between the two. I know that I can do it by using the -graymid options. There are 2 questions I have with respect to that option.
How can I do it without having to recalculate the other surfaces, which seems to happen, if I run e.g. " mris_make_surfaces -graymid -MGZ subject_id lh/rh"?
Is there a away of telling recon-all to directly calculate the graymid surface?
Thanks, Jakob