脑多发性硬化的MRI征象分析

目的　提高对脑多发性硬化 (MS)MRI表现特征的认识。方法　采用 0 .5T超导式磁共振仪 ,对 6 1例临床确诊的脑内MS病人行SE序列扫描 ,分析其MRI表现及特征。结果　 6 1例MS在MRI上均发现病灶。MRI对于大脑半球、小脑和脑干的病灶均能清晰显示 ,对视神经病灶显示不佳。MS病灶T1WI呈中等或低信号 ,T2 WI均为高信号。脑室旁病变其长轴多与侧脑室垂直及胼胝体的信号异常和萎缩对MS确诊起着重要作用。结论　MRI可显示MS的特征性表现 ,能发现许多CT不能发现的病灶 ,是目前诊断MS最好的影像检查方法。

Analysis of MRI Manifestations in Cerebral Multiple Sclerosis

Objective To get a better understanding of the characteristic MRI appearances of cerebral MS lesions.Methods 61 patients with clinically diagnosed multiple sclerosis were examined with SE sequences,using 0.5T super-conducting scanner.The MRI features of MS were analyzed.Results All of the patients in 61 cases were found MS lesions in MRI.The lesions in cerebral,brainstem,and cerebellum were clearly visualized,but in optic nerves were not so good.The MS foci appeared low or middle signal intensity in T 1WI and high signal intensity in T 2WI.It was playing an important role in the diagnosis of the MS that the paraventricular lesions were perpendicular to the lateral ventricles and there were MRI abnormal signals in corpus callosum with shrinking. Conclusion MRI can show the characteristic appearances of MS lesions,demonstrate many more lesions that not visible on CT scan,provide informations about the number,size,location and extent of the lesions therefore MRI is the first method of choice in the diagnosis of MS.