体素内不相干运动扩散加权成像在乳腺病变中的应用研究
发布时间:2019-05-23 03:49
【摘要】:目的 1.探讨体素内不相干运动扩散加权成像(IVIM-DWI)监测乳腺病变的可重现性研究。 2.分析IVIM-DWI在良恶性病变鉴别诊断中的应用及其与乳腺癌预后免疫组化指标(ER、PR、C-erbB-2及Ki-67)的相关性,评估其预测预后因素的潜力。 材料与方法 1.2012.12-2013.12连续分析67例乳腺磁共振扫描的患者,测量病变的IVIM参数Standard ADC、Slow ADC(真实扩散系数)、 Fast ADC(灌注相关扩散系数)及Fraction of Fast ADC(灌注系数f)值。 2.其中20例在间隔24-48h内重复IVIM-DWI扫描,通过配对t检验比较IVIM-DWI参数在重复扫描间的差异,应用组内相关系数(intraclass correlation coefficient,ICC)及Bland-Altman(95%一致性界限)对重复扫描时参数测量的可重复性进行评价。 3.将手术或穿刺的患者根据病理结果分为良恶性病变组,并取患者自身对侧正常的乳腺组织为对照组,对3组定量参数进行统计学分析。 4.比较3组组内Standard ADC、Slow ADC的差异,,分析其ROC曲线。 5.进一步将乳腺导管癌分别分为ER、PR、C-erbB-2及Ki-67的阴性及阳性组,良性病变(分叶状肿瘤除外)分为伴有不典型增生和非不典型增生组,采用Mann-Whitney U检验分析各组间IVIM-DWI参数的差异。 结果 1.重复扫描所得IVIM-DWI各参数间的差异无统计学意义,其ICCs值均大于0.8。 2.恶性病变组、良性病变组与对照组Standard ADC、Slow ADC平均值依次升高,且两两比较具有统计学意义;而Fast ADC、Fraction平均值依次降低,进一步两两比较,Fraction平均值的差异具有统计学意义;良性病变组与对照组间FastADC平均值的差别均有统计学意义,其余组间Fast ADC平均值的差别无统计学意义。 3.3组组内Standard ADC和Slow ADC平均值的差异均有统计学意义,Slow ADC的ROC曲线下面积大于StandardADC。 4.30例乳腺导管癌中,ER阴性组和阳性组的Standard ADC、Slow ADC及Fraction平均值差异有统计学意义,PR阴性组和阳性组的Slow ADC平均值差异有统计学意义,其余各组的各参数平均值差异没有统计学意义。 5.30个良性病变中,除外分叶状肿瘤,伴有不典型增生(8个)和非不典型增生(19个)组间StandardADC、SlowADC平均值差异有统计学意义,但FastADC、Fraction平均值的差别无统计学意义。 结论 1.乳腺IVIM-DWI可重现性好。 2. IVIM-DWI对乳腺良恶性病变的鉴别诊断有意义。 3.微血管灌注效应在DWI中的作用不可忽视,IVIM-DWI能提高诊断的敏感性。 4. IVIM-DWI定量参数与乳腺癌的部分免疫组化指标相关。
[Abstract]:Objective 1. To investigate the reproducibility of voxel incoherent motion diffusion weighted imaging (IVIM-DWI) in monitoring breast lesions. 2. To analyze the application of IVIM-DWI in differential diagnosis of benign and malignant lesions and its correlation with prognostic markers (ER,PR,C-erbB-2 and Ki-67) of breast cancer, and to evaluate the potential of prognostic factors. Materials and methods 1.2012.12 / 2013.12 was used to analyze 67 patients with breast magnetic resonance scanning. The IVIM parameter Standard ADC,Slow ADC (real diffusion coefficient) was measured. Fast ADC (perfusion related diffusion coefficient) and Fraction of Fast ADC (perfusion coefficient f). 2. Among them, 20 cases repeated IVIM-DWI scan within 24 鈮
本文编号:2483573
[Abstract]:Objective 1. To investigate the reproducibility of voxel incoherent motion diffusion weighted imaging (IVIM-DWI) in monitoring breast lesions. 2. To analyze the application of IVIM-DWI in differential diagnosis of benign and malignant lesions and its correlation with prognostic markers (ER,PR,C-erbB-2 and Ki-67) of breast cancer, and to evaluate the potential of prognostic factors. Materials and methods 1.2012.12 / 2013.12 was used to analyze 67 patients with breast magnetic resonance scanning. The IVIM parameter Standard ADC,Slow ADC (real diffusion coefficient) was measured. Fast ADC (perfusion related diffusion coefficient) and Fraction of Fast ADC (perfusion coefficient f). 2. Among them, 20 cases repeated IVIM-DWI scan within 24 鈮
本文编号:2483573
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