"0: 1.9–4.5 mm"
"2: lateral to lateral margin of clivus or dorsum sellae"
"3: in the cerebellopontine angle cistern"
"0: at or below the dorsum sellae"
"1: within the suprasellar cistern (one cut above dorsum)"
"2: at the 3rd ventricle floor (one cut above suprasellar cistern)"
"3: indenting and elevating the floor of the 3rd ventricle (two or more cuts above suprasellar cistern)"
Expected headings
"Basilar artery diameter"
"Laterality"
"Height of bifurcation"
"History and etymology"