磁共振弥散加权成像（DWI）反映了水分子的微观弥散运动，是从细胞及分子水平来进行疾病研究的新技术；

MR diffusion-weighted imaging(DWI) reflects the microscopic Brownian motion of water molecules. It is a new technology for disease research from the cellular and molecular level.

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目的利用弥散加权成像（DWI）、磁共振血管成像（MRA）对大脑中动脉（MCA）区域TIA进行解剖性定位，评价磁共振对临床实践的指导意义。

Objective To locate transient cerebral ischemic attack (TIA) within MCA territory with MR diffusion-weighted imaging(DWI)and MR angiography(MRA), and to evaluate the role of fMRI in clinic practising.

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