rADC of edema were significantly different among high-grade glioma and metastatic tumors. Conclusion: DWI and the rADC of tumors and edema are valuable to differential diagnosis of brain metastatic tumors and gliomas in clinical application.

• 高级别胶质瘤与转移瘤瘤周水肿的rADC值相比较存在差异、结论:DWI及瘤灶、瘤周rADC值的定量测定对脑转移瘤与胶质瘤的鉴别诊断具有一定的临床应用价值。