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早期非增强 CT 扫描能在梗塞灶检出前出现大脑中动脉(MCA)高密度影,该征象在几天内消失,与血凝块本身消失的时间一致,可能提示预后不良。本研究目的在于确定大脑动脉高密度征的发生率及其临床意义。272例首次发生急性脑血管意外的患者,男132例,女140例,平均年龄67.36岁(15～96岁),其中151例为大脑中动脉分布区梗塞,全部患者在起病后12h 内及10～15天行非增强 CT 常规扫描。具备下列5项标准定为 MCA 高密度征:1.MCA 水平段非
Early non-enhanced CT scans showed a high density of middle cerebral artery (MCA) images before the infarct was detected, and disappeared in a few days, consistent with the disappearance of the clot itself, suggesting a poor prognosis. The purpose of this study is to determine the incidence of high-density cerebral artery disease and its clinical significance. Among the 272 patients with first acute cerebrovascular accident, there were 132 males and 140 females with an average age of 67.36 years (range, 15-96 years). Among them, 151 cases were infarction of middle cerebral artery, all patients within 12 hours after onset and 10 to 15 days routine non-enhanced CT scan. With the following five criteria set for high-density MCA sign: 1.MCA level non-paragraph