脑转移瘤的MRI诊断

MRI diagnosis of brain metastases

目的研究脑转移瘤的MRI表现,探讨其对脑转移瘤的诊断价值。方法回顾分析经临床及病理证实的脑转移瘤50例,所有的病例均行颅脑MRI平扫及增强扫描,都包括T1WI、T2WI、FLAIR及DWI。结果 50例脑转移瘤中单发12例,多发38例;其中MRI平扫T1WI发现病灶95个,平扫FLAIR发现病灶120个,增强T1WI发现病灶156个,增强FLAIR发现病灶192个。结论 MRI增强扫描比平扫能发现更多的脑转移瘤病灶,尤其是增强FLAIR序列;脑转移瘤MRI表现具有一定的特征性,结合临床病史大部分能做出正确诊断。

Objective To study the MRI manifestation of brain metastasis,and to discuss the diagnostic value of brain metastasis.Methods The clinical data of fifty patients with clinically and pathologically proved brain metastasis was retrospectively analyzed.Plain MRI scan and enhanced MRI scan were performed in all the cases,including T1WI、T2WI、FLAIR and DWI.Results There were 12 cases of single focus and 38 cases of multiple foci,a total of 192 foci.Non-enhanced T1WI images,non-enhanced FLAIR images,enhanced T1W images and enhanced FLAIR images showed 95 foci,120 foci,156 foci,and 192 foci,respectively.Conclusion Enhanced MR images are significantly more efficient than non-enhanced MR images in the diagnosis of brain metastatic foci,especially enhanced FLAIR images.Brain metastases can be diagnosed correctly according to the MRI characteristic findings combined with disease history of the patients.