Create cerebellum surface file

1

Hi,

I wonder if it is possible to create a surface surf.gii file from the recon-all output.

I made a mask from the aseg.mgz file a cerebellum mask.

mri_binarize --i $SUBJECTS_DIR/MySubject/mri/aseg.mgz \
             --match 7 8 46 47 \
             --o $SUBJECTS_DIR/MySubject/mri/cerebellum_mask.mgz

Then I converted it to a surfice file but it seems the file cannot be open in freeview.

mri_vol2surf --src $SUBJECTS_DIR/MySubject/mri/cerebellum_mask.mgz \
             --out $SUBJECTS_DIR/MySubject/surf/cerebellum.surf.gii \
             --regheader MySubject\
             --hemi lh

What is the best approach to use?

Simon