一侧大脑中动脉高密度征在超急性脑梗死CT诊断中的意义探讨

目的提高对单侧大脑中动脉高密度征（hyerdense middle cerebralartery sign,HMCAS）的认识,探讨其在超急性期脑梗死CT诊断中的意义。方法回顾分析16例单侧大脑中动脉高密度征的超急性期脑梗死患者,所有患者发病1～6h内行CT扫描及发病后24h后复查CT。结果16例患者均发现有单侧大脑中动脉高密度征,24h后复查CT,该侧大脑中动脉供血区均出现大片状低密度灶,其中7例大脑中动脉高密度征消失。结论侧大脑中动脉高密度征（HMCAS）,是CT诊断超级性脑梗死的重要征象。

Explore the significance of unilateral hyerdense middle cerebral artery sign(HMCAS) in the diagnosis of very early cerebral infarction with CT

Objective To explore the significance of unilateral HMCAS in the diagnosis of very early cerebral infarction with CT.Methods 16 cases that had very early cerebral infarction with unilateral HMCAS were analyzed retrospectively.Which were confirmed by clinical data.All cases were examined with CT within 1-6 hours after the onset of the disease,and CT scanning after 24 hours.Results The CT features of all cases were reviewed,It was found that unilateral HMCAS existed in the first CT scanning,all cases were followed-up by CT after 24 hours,A big area of low density in the region supplied by MCA was shown,Unilateral HMCAS displayed in 7 cases.Conclusion Unilateral HMCAS is an important feature in the diagnosis of very early cerebral infarction with CT.