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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。
Objective To improve the knowledge of hyerdense middle cerebralartery sign (HMCAS) and explore its significance in CT diagnosis of hyperacute cerebral infarction. Methods We retrospectively analyzed 16 patients with hyperacute cerebral infarction who were characterized by high density of unilateral middle cerebral artery. All patients underwent CT scan within 1 ~ 6h and CT after 24 hours after onset. Results 16 patients were found in unilateral middle cerebral artery high density sign, CT 24 hours after the review, the side of the middle cerebral artery blood supply areas were large low-density lesions, of which 7 cases of middle cerebral artery high density sign disappeared. Conclusion The middle cerebral artery high density sign (HMCAS) is an important sign of CT diagnosis of super cerebral infarction.