Abstract

目的 探讨高分辨磁共振成像(high resolution magnetic resonance imaging, HR-MRI)对胸膜病变的诊断价值.方法对5例正常志愿者和44例胸膜病变患者行常规MRI和HR-MRI检查,对其中20例进行了图像对比噪声比(CNR)与信号强度比(SIR)的测量,比较分析常规MRI和HR-MRI对胸膜病变的诊断价值.结果 HR-MRI T1WI对5例正常人胸壁主要结构的显示情况明显优于常规MR T1WI (P 0.05). 常规MRI与HR-MRI+常规MRI对良、恶性胸膜病变的鉴别诊断的敏感性分别为72%、 88%,特异性为53%、 75%,正确率为68%、 84%,阳性预测值为82%、90%,阴性预测值为44%、69%.但常规MRI与HR-MRI相结合对良恶性胸膜病变的鉴别诊断价值与单纯的常规MRI比较无明显差异(P>0.05).结论 HR-MRI提高了图像空间分辨率,增加了胸膜病变与肋间肌信号的对比,并且可以清楚地显示最内肋间肌及其内侧的胸膜外脂肪线等邻近胸膜的胸壁深层结构,有利于发现早期胸膜病变的胸壁浸润,在临床工作中 HR-MRI可作为MRI检查的重要补充手段。

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