摘要
目的探讨扩散峰度成像(DKI)联合动态对比增强MRI(DCE-MRI)诊断乳腺良、恶性病变的价值,以及对不同病理预后因素和分子亚型病变的鉴别诊断能力。
方法回顾性分析2016年11月至2017年5月上海市第一人民医院经手术或穿刺病理证实的64例乳腺疾病患者。均行横断面T1WI、DKI和DCE-MRI检查。获取DKI参数[包括扩散峰度值(MK)、平均扩散率(MD)]和DCE-MRI参数[包括容量转移常数(Ktrans)、血管外细胞外间隙容积比(Ve)、血浆分数(Vp)和速率常数(Kep)]。进行病理分析,监测雌激素受体(ER)、孕激素受体(PR)、人类表皮生长因子受体2(HER-2)及细胞核增殖指数Ki67,并将乳腺癌分为Luminal A型、Luminal B型、HER-2阳性型和三阴性型4种亚型。采用两独立样本t检验(正态分布且方差齐性数据)或Mann-Whitney U检验(偏态分布或方差不齐)比较乳腺良、恶性病灶间DKI参数及DCE-MRI参数的差异。以病理结果为金标准,绘制ROC评价DKI及DCE-MRI参数鉴别诊断乳腺良、恶性病变的效能。采用Mann-Whitney U检验和Kruskal-Wallis H检验比较不同预后因素间、不同分子亚型乳腺癌间DKI及DCE-MRI参数的差异。采用Spearman秩相关分析评价DKI及DCE-MRI参数与不同预后因素的相关性。
结果64例病灶均为单发,乳腺癌23例,良性病变41例。乳腺癌中,Luminal A型9例、Luminal B型7例、HER-2阳性型3例、三阴性型4例;ER、PR和HER-2阳性者分别为14、11和10例;Ki67高表达19例,低表达4例。乳腺良、恶性病变的MK、MD、Ktrans和Kep值差异均有统计学意义(P均〈0.05),Ve和Vp差异无统计学意义(P均〉0.05)。MK、MD、Ktrans、Kep鉴别诊断乳腺良、恶性病变的ROC下面积分别为0.897、0.808、0.844和0.842,联合多参数的鉴别诊断效能提高,联合上述4个参数,ROC下面积为0.950,诊断敏感度、特异度和准确度分别达0.870、0.9
ObjectiveTo evaluate the diagnostic efficacy of MRI diffusion kurtosis imaging (DKI) and quantitative dynamic contrast enhancement MRI (DCE-MRI) in benign and malignant breast lesions, and to explore the differential diagnosis ability for different pathological types and molecular subtype lesions.
MethodsSixty four females were retrospectively enrolled in the study of MRI diffusion kurtosis imaging and quantitative dynamic contrast enhancement between November 20 and May 2017. All of them were confirmed to have benign or malignant lesions after surgical resection or puncture. All patients underwent axial T1WI, DKI and DCE-MRI examinations. The mean kurtosis (MK) and mean diffusivity (MD) values were calculated by the DKI model, and the hemodynamic parameters were obtained by quantitative dynamic contrast enhancement, including volume transfer constant (Ktrans), rate constant (Kep), extravascular extracellular space distribute volume per unit tissue volume (Ve) and blood volume fraction (Vp). Pathological analysis was performed to monitor the expression of estrogen receptor (ER), progesterone receptor (PR), human epidermal growth factor receptor 2 (HER-2) and nuclear proliferation index Ki67. The breast cancer was divided into Luminal A type, Luminal B type, HER-2 positive and triple-negative 4 subtypes. The differences of DKI parameters and DCE-MRI parameters between benign and malignant breast lesions were compared using two independent samples t test (normal distribution and homogeneity of variance) or Mann-Whitney U test (skewed distribution or variance). ROC analysis was used to evaluate the value of DKI and DCE-MRI parameters in differential diagnosis of benign and malignant breast lesions with pathological results as the gold standard. The Mann-Whitney U test and Kruskal-Wallis H test were used to compare the differences of DKI and DCE-MRI parameters among different prognostic factors and molecular subtypes of breast cancer. Spearman rank correlation an
作者
李婷
鲁伦博
卓瑶瑶
连婧阁
孔德兴
熊赟
李康安
Li Ting;Lu Lunbo;Zhuo Yaoyao;Lian Jingge;Kong Dexing;Xiong Yun;Li Kang'an(Department of Radiology, Shanghai General Hospital, Shanghai 200080, Chin)
出处
《中华放射学杂志》
CAS
CSCD
北大核心
2018年第6期436-441,共6页
Chinese Journal of Radiology
基金
上海市科委科技创新项目(17441900700)
专科疾病临床“五新”转化项目(16CR3091B)
科技部863计划项目(2015AA020105-10)
关键词
乳腺肿瘤
磁共振成像
扩散峰度成像
动态对比增强
Breast neoplasms
Magnetic resonance imaging
Diffusion kurtosis imaging
Quantitative dynamic contrast enhancement