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目的 :探讨 GD- DTPA在脑转移瘤中的诊断及鉴别诊断价值。方法 :对 2 5例经手术及临床证实的脑转移瘤患者 ,行 MRI平扫及增强扫描 ,其中 9例行 CT平扫及增强。结果 :脑单发转移瘤 5例 ,多发转移瘤 2 0例 ,幕上转移 15例 ,幕下转移 3例 ,兼有 7例 ,3例合并脑膜转移。T1 WI发现病灶 35个 ,T2 WI发现病灶 45个 ,增强扫描发现病灶 12 5个 ,增强扫描发现病灶是非增强的近 2 .8倍。结论 :增强扫描 MRI对脑转移瘤的检出率明显高于非增强扫描 ,尤其对肿瘤与水肿的区分、脑膜转移以及鉴别诊断等方面起着重要作用
Objective: To investigate the value of GD-DTPA in the diagnosis and differential diagnosis of brain metastases. Methods: Twenty-five patients with brain metastases who had been surgically and clinically confirmed underwent MRI plain scan and enhanced scan. Nine patients underwent CT scan and contrast enhancement. Results: There were 5 cases of solitary brain metastases, 20 cases of multiple metastases, 15 cases of supratentorial metastasis and 3 cases of metastable supratentorial cells. There were 7 cases and 3 cases with meningeal metastasis. Thirty-five lesions were found on T1WI, 45 lesions were found on T2 WI, 125 lesions were found on contrast enhanced scan, and nearly 2.8 times non-enhancement on enhanced scan. Conclusions: The detection rate of enhanced MRI on brain metastases is significantly higher than that of non-enhanced MRI, especially in the distinction between tumor and edema, meningioma metastasis and differential diagnosis