【摘要】 目的:探讨弥散加权成像(DWI)对脑转移瘤与胶质瘤鉴别诊断的应用价值。方法:对常规MR扫描检出的42例颅内占位病人行DWI扫描,对病人术后病理随访后,将高级胶质瘤、低级胶质瘤及脑转移瘤各分成一组,并测定肿瘤区、水肿区、对侧正常脑组织的表现弥散系数(ADC)值及相对ADC(rADC)值。结果:低级胶质瘤与转移瘤的瘤灶rADC值比较存在差异;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。更多还原

【Abstract】 Objective: To evaluate the value of diffusion weighted imaging (DWI) in the differential diagnosis of brain metastatic tumors and gliomas. Methods: ■urty-two patients with intracranial tumor were studied with convention MR imaging and DWI. On the basis of the pathological ■eport, the patients were divided into three groups (high-grade gliomas, low-grade gliomas, brain metastatic tumors). The app■rent diffusion coefficient (ADC) and relative ADC (rADC) of tumors, edema and contralateral normal brain were measured. Results: rADC of tumors were significantly different among low-grade glioma and metastatic tumors. 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.更多还原