分水岭脑梗塞(Watershed Cerebral infarcts,简称WS梗塞)是缺血性脑梗塞的一种类型,是指两支主要脑动脉供血交界区边缘带发生的脑梗塞。核磁共振(MR)检查是WS梗塞的重要诊断方法之一,比CT更进一步。为提高对本病的认识,本文对其MRI表现、分型、病因、发病机理、诊断和鉴别诊断均作了探讨和分析。 Watershed cerebral infarction (WS infarct) is a type of ischemic cerebral infarction, which refers to the cerebral infarction that occurs at the margin of the junction of two major cerebral arteries. Nuclear magnetic resonance (MR) examination is one of the important diagnostic methods of infarction in WS, one step further than CT. In order to improve the understanding of this disease, this article discusses and analyzes its MRI manifestations, classification, etiology, pathogenesis, diagnosis and differential diagnosis.