title: Three-dimensional electron beam CT angiography in the diagnosis of intracranial aneurysms.
abstract: OBJECTIVE
  To assess the accuracy of three-dimensional electron beam CT angiography (3D-EBCTA) in the detection of intracranial aneurysms.
  
  
  METHODS
  31 patients with suspected cerebral aneurysms (including 3 post-operative patients) were examined by 3D-EBCTA. Those receiving angiography or surgery acted as controls. Maximum intensity projection (MIP) and shaded surface display (SSD) reconstruction ways were selected.
  
  
  RESULTS
  24 aneurysms were found in 23 patients. Of the 31 patients, false positive was noted in 1 patient, and false negative in 2 on 3D-EBCTA. The sensitivity, specificity, accuracy, positive predictive value and negative predictive value were 92.0%, 88.9%, 91.2%, 95.8% and 80.0% respectively.
  
  
  CONCLUSIONS
  3D-EBCTA is an noninvasive, rapid, valuable method in diagnosis and screening of patients with suspected aneurysms. The reconstruction modes such as MIP and SSD should be used together to optimise the visualization.
authors.affiliation: Department of Radiology, Huashan Hospital, Shanghai Medical University, Shanghai 200040, China.
authors.forename: S
authors.initials: S
authors.lastname: Chen
authors.forename: T
authors.initials: T
authors.lastname: Shen
authors.forename: X
authors.initials: X
authors.lastname: Chen
mesh_terms: D000328:Adult; D002536:Cerebral Arteries / Q000000981:diagnostic imaging; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D021621:Imaging, Three-Dimensional; D002532:Intracranial Aneurysm / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed / Q000379:methods