title: MRA or CTA, that's the question.
abstract: A 26-year-old woman developed a painful left pupil-involving oculomotor palsy. Magnetic resonance imaging of the brain and orbits with and without fat suppression and gadolinium and magnetic resonance angiography of the head were normal. A computed tomographic angiogram showed a left 7-mm posterior communicating artery aneurysm. The different neuroimaging modalities used to diagnose intracranial aneurysms are discussed.
authors.affiliation: Department of Ophthalmology, University of Alabama, Birmingham, Alabama, USA.
authors.forename: Michael S
authors.initials: MS
authors.lastname: Vaphiades
authors.forename: Joseph A
authors.initials: JA
authors.lastname: Horton
mesh_terms: D000328:Adult; D002340:Carotid Artery Diseases / Q000175:diagnosis*; D002343:Carotid Artery, Internal / Q000473:pathology*; D002533:Cerebral Angiography / Q000295:instrumentation*; D005260:Female; D006801:Humans; D002532:Intracranial Aneurysm / Q000175:diagnosis*; D018810:Magnetic Resonance Angiography / Q000379:methods*; D009886:Ophthalmoplegia / Q000175:diagnosis; D014057:Tomography, X-Ray Computed / Q000379:methods*