title: [Arteriography using helicoidal computerized tomography in the study of complex aneurysms of the circle of Willis].
abstract: BACKGROUND
  Computed tomography angiography (CTA) can add information to digital subtraction angiography (DSA) in selected cases of aneurysms of the circle of Willis.
  
  
  METHODS
  1. Patient with progressive visual loss and headache. CT and DSA showed an image of partially thrombosed suprasellar aneurysm. CTA better defined the relationship between the lesion and regional vessels. 2. Woman with subarachnoid hemorrhage (SAH). CTA defined the aneurysmal neck and its relationship to the clinoid process. 3. Man with SAH, CT and DSA showed an arteriovenous malformation and three arterial aneurysms one of which was in a tortuous vessel. CTA confirmed digital angiographic data.
  
  
  CONCLUSIONS
  CTA is a new image technique that can either add or confirm DSA findings in complex aneurysms of the circle of Willis.
authors.affiliation: Sección de Neurorradiología, Hospital General Universitari Vall d'Hebron, Barcelona, España.
authors.forename: B
authors.initials: B
authors.lastname: Ibarra
authors.forename: F J
authors.initials: FJ
authors.lastname: Romero
authors.forename: L
authors.initials: L
authors.lastname: Fernández-Lara
authors.forename: P
authors.initials: P
authors.lastname: Coscojuela
mesh_terms: D000328:Adult; D015901:Angiography, Digital Subtraction; D002533:Cerebral Angiography / Q000379:methods*; D002941:Circle of Willis / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D002532:Intracranial Aneurysm / Q000150:complications / Q000000981:diagnostic imaging*; D002538:Intracranial Arteriovenous Malformations / Q000150:complications / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged; D013345:Subarachnoid Hemorrhage / Q000000981:diagnostic imaging / Q000209:etiology; D014057:Tomography, X-Ray Computed / Q000379:methods*; D014786:Vision Disorders / Q000209:etiology
vernacular_title: La arteriografía con tomografía computarizada helicoidal en el estudio de los aneurismas complejos del polígono de Willis.