Fig. 3

Magnetic resonance imaging. a Axial T1 sequence slice containing most apical image, including orbits used to measure head size. b Coronal T1 sequence slice selecting image at level of ear canal used to measure head size. c Postcontrast T1 axial image shows maximal enhancing tumor diameter used to measure tumor location. d Postcontrast T1 coronal image shows maximal enhancing tumor diameter used to measure tumor location