后循环缺血导致的孤立性眩晕MRI应用进展
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摘要
眩晕是神经内科门诊最常见的主诉,椎基底动脉缺血可导致小脑、脑干梗死,早期可仅表现为孤立性眩晕,临床确诊比较困难。从孤立性眩晕患者中筛查出血管源性卒中患者非常关键。以往常规MRI结合MRA对后循环缺血性病变的检出敏感度较高,但特异度一般。动脉自旋标记(ASL)成像技术较MRA能更直观地反映后循环的血流变化并且能对其定量分析,采用ASL技术结合常规MRI、DWI和MRA对责任血管、缺血部位及缺血严重程度进行判断,可显著提高磁共振检查对于早期脑缺血性眩晕的检出率及准确性。
        
引文
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