title: Three-dimensional CT angiography and surgical correlation in the evaluation of intracranial aneurysms.
abstract: OBJECTIVE
  To evaluate the diagnostic accuracy of three-dimensional CT angiography in the surgical treatment of intracranial aneurysms.
  
  
  METHODS
  Twenty-four patients suspected of intracranial aneurysms underwent routine catheter four-vessel angiography, three dimensional CT angiography (3D-CTA), magnetic resonance angiography (MRA) or conventional digital subtraction angiography (DSA).
  
  
  RESULTS
  A total of 28 aneurysms were detected by CT angiography in this study. Twenty-one patients each had a single aneurysm, two patients each had two aneurysms, and one had three aneurysms. The shapes of aneurysms revealed by 3D-CTA were round in 20 lesions, elliptical in 5, and 1 obulated in 3. Of the 24 lesions which were completely disclosed during surgery, the shapes correlated well with the 3D-CT angiograms. The mean diameter of the aneurysmal neck was 5.9 mm in 3D-CTA images, with the smallest being 1.6 mm and the largest 13.7 mm. The size was very close to the actual size measured at surgery (P < 0.001), revealing that 3D-CT angiograms correlated well with surgical findings. Compared with images obtained by routine catheter four-vessel angiography, MRA and DSA, 3D-CTA images depicted the relationship of aneurysms to parent vessels and other branches more clearly.
  
  
  CONCLUSIONS
  3D-CTA enables surgeons to understand the 3D structure of intracranial aneurysms and is very useful in planning the surgical treatment of cerebral aneurysms.
authors.affiliation: Neurosurgical Department, Sichuan Provincial People's Hospital, Chengdu 610072, China. RyanFeng@hotmail.com
authors.forename: Hailong
authors.initials: H
authors.lastname: Feng
authors.forename: Haibin
authors.initials: H
authors.lastname: Tan
authors.forename: Kuszuo
authors.initials: K
authors.lastname: Kiya
authors.forename: Xiaoling
authors.initials: X
authors.lastname: Liao
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000792:Angiography; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D002532:Intracranial Aneurysm / Q000000981:diagnostic imaging* / Q000601:surgery; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed / Q000379:methods*