24 小时内缺血性脑梗塞的CT 研究

通过回顾性分析病程在２４小时因性脑塞患者的ＣＴ片，对其早期ＣＴ征象进行评价，以提高对该病的早期诊断水平。方法回顾性分析经临床确诊的２５０例２４小时内脑梗塞及１００例正常人的ＣＴ表现，评价致密动脉征，豆状核征，脑岛带征，占位征，低密度灶，皮质征等ＣＴ表现。

CT study of ischemic cerebral infarction within 24 hours

Purpose:To assess the CT signs within 24 hours after cerebral infarction.Methods:CT appearances of 250 cases of clinically confirmed ischemic cerebral infarction within 24 hours were reviewed retrospectively with 100 normal persons as normal controls. The following early CT signs were evaluated: dense artery sign,lentiform nucleus sign,insular ribbon sign,space occupying effect,hypodense lesion and cortical sign.Results:Sensitivity of dense artery sign,lentiform nucleus sign,insular ribbon sign,space occupying effect,hypodensity lesion and cortical sign were 20.8%,23.6%,8.8%,11.6%,56.8% and 14.8% respectivelyP<0.05 as compared with normal control group.The degree of usefulness of signs cited above were 0.29,0.38,0.40,0.42,0.62,0.43 respectively.Conclusion:CT positive rate of ischemic cerebral infarction within 24 hours can reach to 84%.The valuable early CT signs of ischemic cerebral infarction are hypodense lesion,lentiform nucleus sign,insular ribbon sign and cortical sign. The desne artery sign and space occpying effect must be combined with other signs in order to diagnose cerebral infarction.Strengthen these signs might improve the early detection of ischemic cerebral infarction.