`PAM50_atlas_3[2-3].nii.gz` have pixels outside the cord

[valosekj]

GM left and right intermediate zones (PAM50_atlas_32.nii.gz and PAM50_atlas_33.nii.gz) seem to have some voxels outside of the cord.

cd $SCT_DIR/data/PAM50
fsleyes template/PAM50_t2.nii.gz atlas/PAM50_atlas_3[2-3].nii.gz

Go to z slice 428:

Also see z slices 289 to 206.