急性大面积脑梗死早期CT征象

目的分析CT平扫对发病24h内急性大面积脑梗死的阳性率及其影响因素，主要评价早期CT征象的意义。方法收集统计24h内急性大面积脑梗死患者38例，均有复查片证实。结果38例急性大面积脑梗死患者24h内CT阴性6例（15．8％），阳性所见有脑实质低密度征、大脑中动脉高密度征、局部脑肿胀，总阳性率为84．2％。结论在熟悉急性脑梗死临床神经解剖和CT定位的基础上，熟悉各早期CT征象，24h内常规CT对急性大面积脑梗死有较高的准确性，可为临床早期治疗及判断预后提供有用的信息。

Early CT findings of acute large cerebral infarction

Objective To analyse the early positive rate cerebral infartion by CT scans and its influencing factors,the early CT findings and significance were emphasized.Methods Collecting statistical incidence 24 hours large cerebral infarction patients 38 cases,review films had confirmed.Results CT manifestations of 38 patients with acute cerebral infarction within 6 hours after onset were as follows: 6 cases(15.8%) were no positive sign on CT scan.Other showed parenchymal hypodensity,hyperdense middle cerebral arte...