it's because we typically fill at a higher resolution to try to preserve as much of the surface topology as we can. Try using the -r flag to change the resolution (e.g. -r 1 should keep the dimensions) On Sat, 28 Oct 2017, Fereshte wrote:
Dear Experts When I use " mris_fill" to fill inside a surface; the output volume dimension increases from 256 to such a huge number ( 700 or so). I'm not sure what the case is. I'd appreciate your help with it. Regards