CT诊断特殊征象的蛛网膜下腔出血

目的:探讨蛛网膜下腔出血的特殊CT征象,提高对此病变的诊断率。方法:回顾性分析17例经证实的具有特殊CT表现的蛛网膜下腔出血病例,分析其形成机理,CT表现特征及与硬膜下血肿的鉴别要点。结果:所有病例均含有颅骨内板下新月形高密度影这种酷似硬膜下血肿的CT表现,但具有内缘不锐利,密度较低且不均匀的特征。结论:CT可以诊断具此特殊表现的蛛网膜下腔出血并与硬膜下血肿鉴别。

CT diagnosis subarachnoid hemorrhage of special sign

Objective:To recognize one special CT sign of subarachnoid hemorrhage and raise the diagnosis level of the special sign.Methods:Retrospectively analysis 17 cases with subarachnoid hemorrhage,all have the special sign and confirmed by clinical.Inquiring into the form principle,CT sign,and the points distinguished from subdural hematomas.Results:17cases all have the same CT show:high density shadow and moon like under the skull,it similar to subdural hematomas,but the inner side isn't sharp,the density is lower and noneven.Conclusion:Subarachnoid hemorrhage with the special sign can be diagnosied by CT and can be distinguished from subdural hematomas.