title: Rotational angiography assessment of cerebral aneurysms.
abstract: OBJECTIVE
  To compare rotational angiography with conventional digital subtraction angiography in the assessment of cerebral aneurysms.
  
  
  METHODS
  Conventional digital subtraction angiography and rotational angiography were compared in 57 patients investigated for the preoperative diagnosis of subarachnoid hemorrhage and in 13 patients after surgery. Images were compared for location, visibility of the aneurysmal neck, vascular branch anatomy, projection, size, presence of spasm, and shape of the aneurysm.
  
  
  RESULTS
  Rotational angiography was superior to the digital angiogram in assessing aneurysms and vascular anatomy in the following percentage of cases: 12% for location, 46% for the presence of a neck, 32% in the assessment of branch anatomy, 19% for projection, 12% for size, 3.5% for spasm, and 19% for shape. After surgery, rotational angiography more clearly demonstrated the presence or absence of a neck in 69% of the cases.
  
  
  CONCLUSIONS
  Rotational angiography often allows better visualization of vascular anatomy and therefore improves the angiographic assessment of aneurysms when compared with conventional digital subtraction angiography, making it an excellent adjunct in the investigation of subarachnoid hemorrhage. The lack of subtraction artifacts from the surgical clips and multiple angles of view also allow better assessment of the presence or absence of a residual neck in postoperative cases.
authors.affiliation: Department of Radiology, Toronto Hospital-Western Division, Ontario, Canada.
authors.forename: D J
authors.initials: DJ
authors.lastname: Hoff
authors.forename: M C
authors.initials: MC
authors.lastname: Wallace
authors.forename: K G
authors.initials: KG
authors.lastname: terBrugge
authors.forename: F
authors.initials: F
authors.lastname: Gentili
mesh_terms: D015901:Angiography, Digital Subtraction / Q000379:methods*; D002533:Cerebral Angiography / Q000379:methods*; D006801:Humans; D002532:Intracranial Aneurysm / Q000000981:diagnostic imaging* / Q000601:surgery; D002546:Ischemic Attack, Transient / Q000000981:diagnostic imaging / Q000601:surgery; D011183:Postoperative Complications / Q000000981:diagnostic imaging; D011856:Radiographic Image Enhancement; D012189:Retrospective Studies; D013345:Subarachnoid Hemorrhage / Q000000981:diagnostic imaging* / Q000601:surgery