Table 2. Number of intrasphenoidal landmarks identified by 3D model and real surgery.

Intrasphenoidal reference	Frequency in 3D model (%)	Frequency in real surgery (%)
Sellar prominence	50/67 (74.6%)	50/67 (74.6%)
Right optic nerve	57/67 (85%)	59/67 (88%)
Left optic nerve	55/67 (82%)	58/67 (86.5%)
Right lateral optic-carotid recess	34/67 (50.7%)	36/67 (53.7%)
Left lateral optic-carotid recess	30/67 (44.7%)	31/67 (46.2%)
Right medial optic-carotid recess	55/67 (82%)	58/67 (86.5%)
Left medial optic-carotid recess	54/67 (80.6%)	57/67 (85%)
Right ICA prominence	60/67 (89.5%)	61/67 (91%)
Left ICA prominence	55/67 (82%)	57/67 (85%)
Clival recess	50/67 (74.6%)	50/67 (74.6%)
Tuberculum sellae	67/67 (100%)	67/67 (100%)

Abbreviations: 3D, three-dimensional; ICA, internal carotid artery.