摘要：目的 探讨平扫液体衰减反转恢复(FLAIR)与增强T1WI序列结合后对脑转移瘤的综合诊断价值.方法 48例脑转移瘤患者原发灶均经过纤维支气管镜活检或手术活检病理证实,所有患者均进行了FLAIR平扫及增强T1WI扫描,对于FLAIR平扫发现可疑病变而增强T1WI扫描表现阴性的患者,加扫增强FLAIR序列.对比分析192处脑转移瘤病灶在平扫FLAIR及增强T1WI序列的显示情况,进一步分析其综合诊断价值. 结果 192处脑转移瘤病灶中,平扫FLAIR序列检出可疑病灶102个,能够明确瘤灶边界的有56个;增强T1WI序列检出病灶183个,能够明确瘤灶边界的有181个;两种序列结合以后,瘤灶检出192个. 结论 FLAIR有助于发现瘤周水肿,对于皮层区域病灶敏感性较高,增强T1WI有助于发现平扫不能发现的病灶,诊断特异性较高,二者结合可以提高脑转移瘤的诊断正确率. Abstract： Objective To investigate the synthetic diagnostic value of plain FLAIR combined with contrast-enhanced T1WI sequence in intracranial metastatic tumor. Methods Retrospective analysis of 48 patients with intracranial metastatic tumor, the primary tumor have been confirmed by fiber bronchoscope biopsy or surgical biopsy. All the patients were performed MRI scans with plain FLAIR and contrast-enhanced T1WI sequence. Contrast-enhanced FLAIR scans for suspicious lesions in plain FLAIR but negative in contrast-enhanced T1WI. Comparative analysis the appearances of 192 lesions in plain FLAIR and contrast-enhanced T1WI sequence, and analyze the synthetic diagnostic value of both sequence. Results One hundred and two lesions were detected in plain FLAIR sequence, and 56 lesions with the clear border.One hundred and eighty-three lesions were detected in contrast-enhanced T1WI sequence, and 181 lesions with the clear border. And 192 lesions were detected with plain FLAIR combined with contrast-enhanced T1WI sequence. Conclusions Plain FLAIR scans are useful to detect edema of the metastatic tumo

关键词：平扫 液体衰减反转恢复 增强 序列对 脑转移瘤 

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