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-  2016 

定量DCE-MRI在肺部良恶性病变诊断中的初步应用 DCE-MRIPilot Study in the Diagnosis of Benign and Malignant Lung Lessions

Keywords: 动态增强,磁共振成像,血管参照模型,肺癌,参考区域模型

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Abstract:

目的:探讨及评价定量动态对比增强磁共振成像(qDCE-MRI)的药物代谢动力学参数在肺部良恶性病变诊断中的价值。方法:回顾性分析40例经病理学证实肺部占位性病变,行1.5T DCE-MRI检查,行血管参照模型和参考区域模型对比分析恶性、良性病变非参检验的定量参数。结果:在血管参照模型:良性病变组与恶性病变组间Ktrans、Kep、Ve、VP参数间无统计学差异,P>0.05。参考区域模型良性病变组与恶性病变组间RRKtrans、KepRR、KepTOI参数差异具有统计学意义(P<0.05);恶性病变组RRKtrans、KepRR、KepTOI高于良性病变组;TTP值在良性病变组中略高于恶性病变组,无显著性差异(P=0.94)。肺腺癌与肺鳞癌定量参数比较,鳞癌RRKtrans、KepRR、KepTOI较腺癌高,但无显著性差异。以病理结果为金标准绘制RRKtrans、KepRR、KepTOI三者ROC得到曲线下面积分别为0.946、0.827、0.855;三者最大约登指数为0.86、0.83、0.67;RRKtrans、kepRR、kepTOI判断肺部良恶性病变敏感度为96%、90%,73%,特异度为80%,76%、90%。定量参数与免疫组化相关性分析得出RRKtrans、KepRR、KepTOI值与MVD呈正相关性(P<0.01,r=0.872,0.838,0.714);与MVD表达亦呈正相关性(P<0.01,r=0.821,0.752,0.711)。结论:参考区域模型对肺部占位性病变良恶性作出鉴别诊断具有潜在的临床意义,DCEMRI定量参数可以预测标本MVD、VEGF水平

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