摘要目的探讨乳腺MR成像作为一种筛查乳腺癌平均患病风险工具的有效性和准确性,并探讨MR成像筛查乳腺癌的类型。材料与方法该前瞻性观察研究是在2个胸部研究中心进行,选取观察对象为40~70岁无乳腺癌相关危险因素的女性(终身风险,15%)。在2005年1月—2013年12月期间,女性取微小残留乳腺组织(美国放射学会分类A-D)和正常常规的影像表现[乳腺X线摄影并行(或未行)超声检 Abstract Objective To investigate the effectiveness and accuracy of breast MR imaging as a tool to screen the average risk of breast cancer and explore the types of breast cancer screening by MR imaging. Materials and Methods The prospective observational study was conducted at two chest study centers and women (lifetime risk, 15%) were selected as subjects who were at risk of breast cancer 40 to 70 years of age. During January 2005-December 2013, women took microscopic residual breast tissue (American Society of Radiology classification A-D) and normal routine imaging findings (mammography concurrent (or not)) ultrasonography