You can mask it with the mri.2mm/aseg.mgz ventricle definitions.
However, there is a flaw in your understanding. What you see as
ventricle or WM may be GM in several/many subjects. The 12DOF
registration is not so good that it get all these things lined up properly.
On 11/23/2015 03:16 AM,
Hi list,I'm performing fcMRI-seed based by FS-FAST.After group comparison and
Monte Carlo correction I obtained cortical and subcortical clusters in pos and
neg maps.On subcortiacal maps, significant clusters at
grf.th1.3.pos.sig.cluster.nii.gz showed some voxels on ventricle or white
matter.
