单发脑转移瘤的MRI诊断

目的: 评价MRI诊断单发脑转移瘤的价值.材料和方法: 回顾性分析38例单发脑转移瘤的临床和MRI表现,病例均经平扫和增强扫描.结果: 38例中,原发于肺癌27例,50岁以上33例;发病过程突然、短期内出现中枢神经障碍症状30例;病灶位于幕上34例,其中25例位于灰、白质交界区.病灶直径>1.0cm时瘤周水肿常较显著.T1WI-FLAIR显示病灶欠清或不清13例,FRFSE-T2WI、T2WI-FLAIR显示欠清或不清楚的分别为5例、2例,增强扫描均清楚显示病灶.结论: MRI增强检查是诊断单发脑转移的最佳方法.

MRI Diagnosis of Solitary Brain Metastases

Purpose: To evaluate MRI diagnostic value in solitary brain metastases. Materials and Methods: MRI and clinical findings of 38 patients with solitary brain metastases were reviewed retrospectively. All the cases were examined with pre-and post-contrast methods. Results: Among the 38 cases, 27 cases had primary tumor in lung, 33 cases were over 50 years old, and 30 cases had sudden onset with neurological disorders. Thirty-four lesions located in supratentorial cerebrum, in which 25 cases lay the junction of gray and white matter. The perifocal edema was often significant when the lesion's diameter larger than 1.0cm. All the lesions were demonstrated clearly by contrast enhancement examination while 13 cases showed unclear on T1WI-FLAIR sequence, 5 cases on FRFSE-T2WI sequence and 2 cases on T2WI-FLAIR sequence. Conclusion: Contrast-enhanced MRI is the best method in finding solitary brain metastases.