摘要
目的评估艾滋病脑弓形虫脑炎的影像表现的诊断价值。方法回顾分析17例艾滋病脑弓形虫脑炎患者的影像表现。结果病变多为双侧多发,可少发;侵犯基底核12例,丘脑3例,皮髓质连接区1例;累及小脑及脑干1例;CT呈低密度,MRI呈长T1、长T2信号;周围水肿效应明显;增强扫描,小环状、螺旋状或靶形增强12例;巨大环形增强1例;多发病灶15例,单发2例。结论位于基底节区的多发小环状、螺旋状或靶形增强,高度提示脑弓形虫脑炎。CT和MRI对弓形虫脑炎是有效的诊断方法。MRI对病灶检出率明显高于CT。
Objective To assess the diagnostic value of CT and MRI findings of toxoplasma encephalitis among AIDS patients. Methods CT and MRI findings of toxoplasma encephalitis were retrospectively studied in 17 AIDS cases. Results The lesions were bilateral and multiple, involving basal nuclei in 12 cases, thalamus in 3 cases, bilateral cerebral hemispheres near corticomedullary junction in 1 case, and cerebellum and brain stem in 1 case. The lesions showed weak hypodensity on CT,and long T 1 and long T2 signal intensity on MRI, with marked peripheral edema effect. After contrast administration,the small ring or twist and target enhancement was seen in 12 cases, large ring enhancement-in 1 case. multiple focus in 15 cases and single focus in 2 cases ; MRI was more sensitive in detecting a largest number of cerebral lesions than CT. Conclusion More small ring and twist, nodular, target enhancement are highly suggestive of toxoplasma encephalitis in the basal nuclei. Both CT and MRI are effective in diagnosing toxoplasma encephalitis, but MRI imaging without and with gadolinium is more sensitive than CT in the detection of toxoplasma encephalitis; MRI imaging may reveal a greater number of lesion when it is positive and so the detection rate of MRI is higher than that of CT.
出处
《中国艾滋病性病》
CAS
2008年第4期368-370,共3页
Chinese Journal of Aids & STD
基金
河南省艾滋病科技攻关项目(编号:200650041)
关键词
艾滋病
弓形虫脑炎
影像诊断
AIDS
Toxoplasma encephalitis
Image diagnosis
