Hi,

for example, in /quality control/ output directory of niak, obtained from the fMRI preprocessing of a group of subjects,
we have func_mask_group_stereonl.mnc.

If I want to generate this mask only for the gray matter, or only for the cortical region (without the brain stem, cerebellum, etc),
what is the best way?

Thanks in advance

**I've been using AAL template resampled for func_mask_group_stereonl.mnc to generate the cortical mask, however, it involves some redundant voxels at the boundary. that's why I'm asking for any better strategy.