窦瑞雪;杨丽;黄宁;时高峰;

• 1:航天中心医院超声科
• 2:河北医科大学第四医院
• 3:GE医疗中国

摘要(Abstract)：

目的探讨动态增强磁共振成像(dynamic contrast-enhanced MRI,DCEMRI)定量参数对乳腺良恶性病变鉴别诊断价值及其与微血管密度(microvessel density,MVD)和血管内皮生长因子(vascular endothelial growth factors,VEGF)的相关性。材料与方法收集河北医科大学第四医院2014年11月至2015年2月67例乳腺病变患者行T1-DCE-MRI扫描,总扫描时相70次,第1时相17.3 s,以后单时相扫描时间4.58 s,总时间约5 min 33 s。测量如下参数:容量转移常数(volume transfer constant,Ktrans)、速率常数(rate constant,Kep)、血管外细胞外间隙容积比(extravascular extracellular volume fraction,Ve)。检查后1周内均经手术取得病理,采用单因素方差分析和LSD法两两比较正常组、良性组及恶性组间定量参数的差异,并绘制ROC曲线分析良、恶性组间的差异。用Pearson相关分析,分析恶性组MVD、VEGF表达与定量参数的相关性。结果正常组Ktrans、Kep、Ve值分别为(0.012±0.003)min-1、(0.439±0.083)min-1、(0.045±0.013);良性组Ktrans、Kep、Ve值分别为(0.049±0.007)min-1、(0.588±0.073)min-1、(0.107±0.022);恶性组Ktrans、Kep、Ve值分别为(0.187±0.045)min-1、(1.205±0.517)min-1、(0.133±0.049)。Kep、Ktrans在良、恶性组间差异有统计学意义(P=0,P=0.041);Kep、Ktrans在正常、恶性组间差异有统计学意义(P=0,P=0.008)。以最大约登指数为最佳诊断切入点,Ktrans、Kep的敏感性分别为86.8%、67.9%。Ktrans、Kep特异性分别为89.5%、94.7%,曲线下面积分别为0.931、0.819。30例乳腺癌患者的Ktrans、Kep、Ve值分别为(0.183±0.031)min-1、(1.192±0.063)min-1、(0.127±0.031),MVD计数为(34.96±9.86),VEGF积分为(5±1)分,均与Ktrans、Kep、Ve呈正相关(P<0.05)。Kep、Ktrans与VEGF相关性最强(r=0.759,r=0.771),与MVD相关性较强(r=0.613,r=0.607)。结论定量参数Ktrans、Kep对乳腺良恶性病变鉴别诊断有临床价值,且有较高的诊断效能。乳腺癌Kt r a ns、Ke p与VEGF、MVD相关性较强,有望成为无创性评价乳腺肿瘤微循环的新方法。

关键词(KeyWords)： 乳腺肿瘤;磁共振成像;动态增强;微血管密度;血管内皮生长因子

Abstract:

Keywords:

基金项目(Foundation):

作者(Authors): 窦瑞雪;杨丽;黄宁;时高峰;

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