医学
数字减影血管造影
侧支循环
磁共振成像
放射科
吻合
计算机断层血管造影
神经影像学
脑循环
血管造影
大脑前动脉
磁共振血管造影
大脑中动脉
缺血
外科
心脏病学
精神科
作者
Pratik Shah,Manish Shrivastava,Hrishikesh Kale,Krishna Mundada
标识
DOI:10.1177/02841851231171687
摘要
The cerebral arterial system shows a wide spectrum of variations. Minor degrees of anatomic differences can be seen in almost all patients. Recognition of these anatomic variants is essential for the following: evaluating collateral circulation; some anatomic variants may mimic pathology; increased risk for aneurysm formation with some variants (e.g. fenestration, persistent trigeminal artery); dealing with pathologies that can arise with these variations; and for preoperative planning. The anterior and posterior groups of intracranial circulation show numerous anastomoses that play a major role in maintaining adequate blood supply to the cerebral parenchyma. This review focuses on the imaging features of these variants as seen on computed tomography and magnetic resonance imaging with relevant digital subtraction angiography imaging. We also present some case illustrations where understanding of these variants contributed to providing appropriate management.
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