脑裂头蚴病的CT和MRI诊断

目的:探讨脑裂头蚴病的CT和MRI表现。方法:回顾性分析5例脑裂头蚴病患者的CT和MRI表现,其中5例行MRI检查,3例同时行CT检查。结果:CT和MRI均能发现脑裂头蚴痛患者脑内多发病灶。主要CT表现为脑内多发不规则斑片状低密度影,边界模糊;可见散在宽点状钙化2例,局部脑萎缩2例;增强后病灶呈环状、结节状强化。MRI显示病灶多位于白质区,于T_1WI呈低信号,T_2WI呈高信号,边界模糊,占位效应不明显,增强后呈结节状、环状、串状或扭曲索条状强化,以矢状面或冠状面图像上显示最佳;出现脑萎缩3例;对CT所见钙化显示不佳。结论:CT和MRI能检出脑裂头蚴病患者的脑内多发病灶,并具有一定特征性表现。

CT and MRI Diagnosis of Cerebral Sparganosis

Objective:To evaluate the CT and MRI features of cerebral sparganosis.Methods:The CT and MRI fea- tures of 5 cases with cerebral sparganosis proved by pathology were retrospectively analyzed.Both pre and post-contrast MRI were performed in 5 cases,3 cases had CT examination simuhaneoulsly.Results:Multiple cerebral lesions were found on CT and MR images in all of these cerebral sparganosis patients.The CT images showed multiple,ill defined,irregular hy- po-attentuation,2 cases had scattered small punctuate calcifications,and 2 cases showed regional cerebral atrophy.After contrast administration,circular or nodular enhanced lesions were assessed.MRI showed that most of the lesions located at white matter with low signal intensity on T_1 WI,high signal intensity on T_2 WI,with unclear margin,yet without obvious oc cupying effect.The enhanced MRI showed nodular,circular,beaded shape or tortuous linear enhanced lesions,which were better showed on coronal plane or sagittal planc.Three cases showed regional cerebral atrophy.MRI was not as sensitive as CT in showing calcifications.Conclusion:Cerebral sparganosis lesions could be identified both on CT and MRI with certain characteristic features.