title: Four-Dimensional Computed Tomography Angiography Demonstrating a Ruptured Basilar Artery Aneurysm Causing Anterior Cerebral Circulation Arrest.
abstract: A 61-year-old woman suffered a pronounced subarachnoid hemorrhage. Conventional computed tomography angiography (CTA) showed no enhancement of the intracranial vasculature, whereas there was normal contrast enhancement of bilateral external carotid artery branches. Subsequent four-dimensional computed tomography angiography (4D-CTA) demonstrated active contrast leakage out of a ruptured basilar tip aneurysm, whereas there was no enhancement of the anterior circulation at any time point, consistent with intracranial anterior circulation arrest. This case illustrates that 4D-CTA is superior to conventional CTA for the evaluation of intracranial flow dynamics and delayed intracranial vascular contrast filling.
authors.affiliation: Department of Radiology and Nuclear Medicine, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands.
authors.forename: Hans G J
authors.initials: HG
authors.lastname: Kortman
authors.affiliation: Department of Neurosurgery, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands.
authors.forename: Hieronymus D
authors.initials: HD
authors.lastname: Boogaarts
authors.affiliation: Department of Radiology and Nuclear Medicine, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands.
authors.forename: Mathias
authors.initials: M
authors.lastname: Prokop
authors.affiliation: Department of Radiology and Nuclear Medicine, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands. Electronic address: Anton.Meijer@radboudumc.nl.
authors.forename: Frederick J A
authors.initials: FJ
authors.lastname: Meijer
mesh_terms: D017542:Aneurysm, Ruptured / Q000150:complications / Q000000981:diagnostic imaging*; D002560:Cerebrovascular Circulation / Q000502:physiology*; D000072226:Computed Tomography Angiography / Q000379:methods*; D005260:Female; D006801:Humans; D002532:Intracranial Aneurysm / Q000150:complications / Q000000981:diagnostic imaging*; D008875:Middle Aged; D013345:Subarachnoid Hemorrhage / Q000209:etiology*
keywords: 4D-CTA; Brain; CTA; cerebrovascular disease; computed tomography