title: Differential diagnosis of infundibular dilation versus a small aneurysm of the internal carotid artery: assessment by three-dimensional rotational angiography with volume rendering.
abstract: We report our findings associated with the differential diagnosis of infundibular dilation (ID) versus a small intracranial aneurysm using three-dimensional rotational angiography with volume rendering (3DRA + VR). Angiographic findings associated with IDs found via two-dimensional digital subtraction angiography (2D-DSA) or 3DRA + VR were reviewed for 138 consecutive patients with known or suspected aneurysms. Two readers independently evaluated the results of 2D-DSA and 3DRA + VR according to the same diagnostic criteria. We also evaluated the ability of 3D-DSA to show the spatial relation between IDs and anterior choroidal (AchA)/posterior communicating (PcomA) arteries. 2D-DSA and 3DRA + VR found 41 and 48 IDs, respectively. 2D-DSA missed five AchA and two PcomA IDs. 2D-DSA was significantly inferior to 3DRA + VR for displaying the spatial relation between IDs and AchA/PcomA (P = 0). Thus, 3DRA + VR provides more useful information for distinguishing IDs from aneurysms. The superiority of 3DRA + VR might be because of its ability to display the spatial relation between IDs and AchA/PcomA.
authors.affiliation: Department of Interventional Radiology, Nanjing First Hospital, Nanjing Medical University, No. 68 Chang Le Road, Nanjing 210006, China.
authors.forename: Wan-Yin
authors.initials: WY
authors.lastname: Shi
authors.forename: Yong-Dong
authors.initials: YD
authors.lastname: Li
authors.forename: Ming-Hua
authors.initials: MH
authors.lastname: Li
authors.forename: Bin-Xian
authors.initials: BX
authors.lastname: Gu
authors.forename: Jian-Ping
authors.initials: JP
authors.lastname: Gu
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002343:Carotid Artery, Internal / Q000000981:diagnostic imaging*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D002532:Intracranial Aneurysm / Q000175:diagnosis / Q000000981:diagnostic imaging* / Q000503:physiopathology; D018810:Magnetic Resonance Angiography / Q000379:methods*; D008297:Male; D008875:Middle Aged; D010904:Pituitary Gland, Posterior / Q000000981:diagnostic imaging* / Q000503:physiopathology; D011859:Radiography; D055815:Young Adult