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目的 探讨MR信号强度在良、恶性胸膜疾病鉴别诊断中的作用。方法 利用 1.5T磁共振诊断仪对 88例经病理证实的胸膜病变进行了检查 ,分别获取T1加权、T2 加权及增强T1加权自旋回波像 ,对胸膜病变的MR信号强度进行了主观评估。结果 良、恶性胸膜病变在T1加权像上的MR信号强度无显著性差异 ;在T2 加权像上 ,41/ 48例恶性及 11/ 35例良性胸膜病变表现为高信号 (敏感度 85 % ,特异度 6 9% ) ;在增强T1加权像上 ,48/ 5 3例恶性及 19/35例良性胸膜病变表现为高信号 (敏感度 91% ,特异度 46 % )。结论 MR信号强度对良、恶性胸膜病变的鉴别诊断有重要的价值 ,但不宜将MR信号强度作为一项独立的评估指标。
Objective To investigate the role of MR signal in the differential diagnosis of benign and malignant pleural diseases. Methods A total of 88 pathologically confirmed pleural lesions were examined by a 1.5T magnetic resonance imaging scanner. T1 weighted, T2 weighted, and enhanced T1 weighted spin echo images were obtained respectively for subjective assessment of MR signal intensity in pleural lesions. Results There was no significant difference in MR signal intensity between benign and malignant pleural lesions on T1 weighted images. On T2 weighted images, 41/48 malignant and 11/35 benign pleural diseases showed high signal (sensitivity 85%, specificity 6 9%). On the enhanced T1 weighted images, 48 of 53 malignant and 19/35 benign pleural diseases showed high signal (sensitivity 91%, specificity 46%). Conclusion MR signal strength has important value in the differential diagnosis of benign and malignant pleural diseases. However, MR signal intensity should not be used as an independent evaluation index.