Hi Bruce,

I wanted to calculate the right and left hemispheric white matter volume using a mask.

Is there any difference between "lh.dwhite.mgz , rh.dwhite.mgz" (the outputs of mris_volmmask after binarize them) and the right and left hemispheric white matter masks from aseg.mgz atlas (the output of mri_binarize command line)?

I am asking this question because those masks gave me different estimation for the volume?

Thanks!

Mohamad