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Azygous Anterior Cerebral Artery and Associated Aneurysms: Detection and Identification Using 3-Dimensional Time-of-Flight Magnetic Resonance Angiography.
MedLine Citation:
PMID:  23163794     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
AIM: The azygous anterior cerebral artery (Az) is a rarely observed anomaly of the anterior cerebral artery, and its associated aneurysm is even rarer. Our aim was to evaluate 3-dimensional time-of-flight magnetic resonance angiography (3-D-TOF MRA) in the diagnosis of Az and associated aneurysms. MATERIALS AND METHODS: Three thousand five hundred seventy-two consecutive patients underwent 3-D-TOF MRA at 3.0 T. Postprocessing techniques, including volume rendering (VR) and single artery highlighting, were performed by a 3-D specialist. All MRA data and clinical information were recorded and stored in a database for further analysis. RESULTS: Fourteen patients (.39%) were identified as having an Az. Among these cases, 3 males (21.43%) had an aneurysm located at the distal bifurcation of the Az, with a mean size of 9.43 ± 3.33 mm. In MRA, the common trunk of the Az was slightly larger in diameter than the A1 segment (2.62 ± .35 mm vs. 2.54 ± .35 mm; P= .008). CONCLUSIONS: With the VR technique, 3-D-TOF MRA is feasible and valuable in detecting an Az and associated aneurysm. Our MRA-based study has proved that the Az is a rare anomaly but has a relatively high incidence of associated aneurysms.
Authors:
Wan-Yin Shi; Ming-Hua Li; Bin-Xian Gu; Yong-Dong Li; Hua-Qiao Tan
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-19
Journal Detail:
Title:  Journal of neuroimaging : official journal of the American Society of Neuroimaging     Volume:  -     ISSN:  1552-6569     ISO Abbreviation:  J Neuroimaging     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-20     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9102705     Medline TA:  J Neuroimaging     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 by the American Society of Neuroimaging.
Affiliation:
From the Institute of Diagnostic and Interventional Radiology The Sixth Affiliated People's Hospital Shanghai Jiao Tong University No. 600, Yi Shan Road Shanghai, China.
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