脑血吸虫性肉芽肿的CT和MRI诊断

【目的】通过对脑血吸虫性肉芽肿的CT和MRI表现进行分析，探讨脑血吸虫性肉芽肿的CT和MRI特征及其诊断价值。【方法】回顾性分析经手术病理及临床证实的脑血吸虫性肉芽肿17例。采用EXEL 1900 Super CT机及XGY0.3T开放式永磁型MRI仪，分别进行平扫及增强扫描。【结果】幕上大脑15例，幕下小脑2例。CT平扫病变呈等或稍高密度，MR平扫T1WI大多呈等或稍低信号，T2WI呈高信号但低于脑脊液信号，液体衰减反转恢复序列呈稍高信号。CT和MRI增强表现为：脑皮质或皮层下区多发或单发大小不等强化结节，呈簇状聚集成团。【结论】脑血吸虫性肉芽肿的CT和MRI表现具有特征性；是临床诊断脑血吸虫性肉芽肿的最有价值的检查手段。

CT and MRI Diagnosis of Brain Schistosomiasis Granuloma in 17 Cases

[Objective]To discuss CT and MRI features of brain schistosomiasis granuloma and their diagnostic value. [Methods]CT and MRI data of 17 cases of brain schistosomiasis granuloma were reviewed . All cases were proved by the surgery or pathological examination and laboratory test. Plain and enhanced CT were performed in all patients with EXEL 1900 Super scanner. All patients were examined by plain and enhanced MRI with XGY Signa profile 0.3 Tesla open scanner. [Results]The lesions located in supratentorial region in 15 cases and in infratentorial region in 2 cases . The nodules were isodense or slight hyperdense on CT plain scan, iso or hypointense on T1WI, hyperintense on T2WI , slight hyperintense on FLAIR. After the contrast material was injected intravenously, CT and MRI findings showed multiple or single enhanced nodules at the cortical or subcortical area, distributed throughout the mass. [ConclusionlThe CT and MRI appearance of brain schistosomiasis granuloma is characteristic,and they are the most valuable tool to diagnose it.