支原体脑炎的磁共振诊断价值

The value of MRI in the diagnosis of pediatric mycoplasma pneumoniae encephalitis

目的:探讨磁共振成像对支原体脑炎的影像学特点及临床诊断价值。方法:对21例支原体脑炎患者行颅脑MRI检查,12例增强扫描。结果:MRI表现异常16例,正常5例。①病变形态及分布:脑白质多发、散在的点状或/及斑片状异常信号8例;两侧大脑半球弥漫性异常信号3例;脑室扩大,侧脑室后角周围异常信号3例;皮层灰质内脑回状异常信号2例;②病变信号:所有病例T2WI及FLAIR序列呈略高或高信号,T1WI呈等或低信号,在DWI(b=1000)像上均呈异常高信号;③增强扫描:12例行增强扫描中,4例呈点状或/及斑片状强化,8例无异常强化。结论:MRI表现具有一定特征性,且有助于诊断支原体脑炎,并可显示支原体脑炎脑实质受累范围和程度,为临床治疗及判定预后提供可靠依据。

Objective：To study the features and value of MR in diagnosis of pediatric mycoplasma pneumoniae（MP） encephalitis.Methods：Twelve one patients were performed MR scanning and the images were analyzed.Results：MRI showed abnormal findings in 16 of all 21 cases.① Affection disposition and form： Of 16 cases eight showed multiple and scattered spot-like or patch-like lesions in medulla,3 showed diffuse abnormal signal,3 showed abnormal signal near the posterior corn of lateral ventricles with cerebral ventricle enlargement,and 2 showed gyrus-like abnormal signal in cortex;② Affection signal： T2WI and FLAIR sequence showed light high or high signal,T1WI showed equal or low signal,DWI（b=1000） showed high signal;③ Enhancement scanning： of the 12 enhancement scannig cases,4 showed spot-like or patch-like enhancement,8 cases had no abnormal enhancement.Conclusion：The MR findings of MP encephalitis have some characteristic,MR examination is helpful to realize the injuried conditions in cerebellum and to evaluate the prognosis.