FIG 3. Thin-section (2.5-mm) axial T1-weighted spoiled gradient-echo gadolinium-enhanced images of the brain obtained at 1.5 T for Gamma knife localization (trigeminal neuralgia). Cranial nerve enlargement (arrows) is most pronounced involving the mastoid or descending segments of cranial nerve VII (A), cisternal segments of cranial nerve III (B), V3 (C), and V2 (D) segments. Faint enhancement is identified.