内部硬膜下血肿的CT和MRI表现  

The CT and MRI Manifestations of Internal Subdural Hematoma

作　　者：郭永榜[1] 

机构地区：[1]南阳市中心医院磁共振室,473000

出　　处：《中国继续医学教育》2015年第29期61-62,共2页China Continuing Medical Education

摘　　要：目的探讨颅脑内部硬膜下血肿的CT和MRI表现,以提高临床诊断正确率。方法回顾性分析我院79例经临床证实的内部硬膜下血肿患者的CT和MRI表现。结果本研究79例患者的内部硬膜下血肿可分为2类,大脑镰旁31例,小脑幕区48例,CT表现为大脑镰旁硬膜下血肿一般为单侧,内表面与大脑镰相贴,外表面呈弧形或波浪状高密度影,小脑幕区硬膜下血肿可位于幕上、幕切迹及幕下,形态多样,血肿边界清楚,不进入附近脑沟和脑池,MRI表现为一般各系列均呈高信号,FLAIR显示最清晰,以T1WI高信号为特征,横断面形态与CT类似,冠状面显示血肿范围更清楚。结论内部硬膜下血肿CT和MRI表现有特征性,MRI显示血肿形态及分布较CT更优越,亚急性期以后复查时可行MRI以免漏诊。Objective To explore the CT and MRI manifestations of internal subdural hematoma （ISDH） and to improvethe accuracy of the diagnosis.Methods The CT and MRI characteristics of the 79 cases with clinically confirmed ISDHwerereviewed.ResultsThe 79 cases could be divided into 2 types, 31 cases were about the falxcerebri and 48caseswere about the cerebellar tentorium, on CT imaging, ISDH beside the cerebral falx were mostly unilateral high densitywith interior surface sticking to the falx and arc or wave exterior, and that about the cerebellar tentorium might be supratentorial, subtentorial or at incisuratentori with various form, all ISDH had clear borders and didn＇t extend to the nearsulus or cistern,on MRI imaging commonly, all ISDH were high signal in every series images,they were the most clearly appeared in FLAIR, and their high signal in T1WI were characteristic,ISDH had the similar form with CT in axialimages, while the extents were showed more clearly in coronal ones.Conclusion There are characteristics of ISDH on CTand MRI imaging,MRI is superior to CT on displaying the form and distribution of ISDH,after the subacute phase,MRIshould be used in reexamining for not missing diagnosis.

关 键 词：硬膜下血肿 内部 体层摄影术 X线计算机 磁共振成像 

分 类 号：R445.2[医药卫生—影像医学与核医学]