Hi Jason
you could try using mris_expand with a negative # of millimeters. At 4mm
you will lose a lot of the gyri and the procedure will probably fail, but
for smaller amounts it should work (and is what we've done in the past).
You can also use mris_distance_transform to compute the distance t
Dear FreeSurfer Experts,
I am attempting to construct surfaces that are 1, 2, 3, and 4 mm
interior from the GM/WM boundary (?h.white). So going gradually deeper
into white matter from the GM/WM boundary. I have successfully used
mris_fill to fill the ?h.white surface and mri_morphology to erod
