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目的探讨单发脑转移瘤的MRI表现。方法回顾性分析经MRI诊断及手术证实的单发脑转移瘤47例。结果单发脑转移瘤幕上38例,小脑半球8例,桥脑1例。平扫T1加权像上主要表现为等或低信号,T2加权像以混杂高、稍高信号为主;增强转移瘤多呈环形或结节样强化,囊变坏死区不强化。结论 MRI平扫及增强扫描能较好的显示单发脑转移瘤的影像特点。
Objective To investigate the MRI manifestations of solitary brain metastases. Methods Retrospective analysis of 47 cases of solitary brain metastases confirmed by MRI diagnosis and surgery. Results Single brain metastases in the supratentorial 38 cases, 8 cases of cerebellar hemispheres, 1 case of pontine. Flat T1-weighted images mainly showed equal or low signal, T2 weighted images were mixed high and slightly high signals; enhanced metastases mostly ring or nodular-like enhancement, cystic necrosis area is not enhanced. Conclusion MRI plain scan and enhanced scan can better show the image characteristics of solitary brain metastases.