aparc+aseg.mgz is probably better. See surfer.nmr.mgh.harvard.edu/fswiki/BrainVolume for the answer to your question.

Satrajit Ghosh wrote:

if one wants to get at the brain only (similar to bet), is brainmask.mgz the best file to use? on some of our data, we are noticing a lot of eyeball.

i presume one can use aseg as an alternative. is this more recommended than brainmask.mgz? also, is the total brain volume computation based on aseg or some other file?

cheers,

satra

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