CR乳腺普查摄影剂量的探讨  

The Discussion of Exposure Dose with Computed Radiography Mammography Screening Dose

作　　者：梁瑞冰[1] 吕婉虹[1] 史瑞雪[1] 郭真真[1] 黄益[1] 梁静鲜[1] 

机构地区：[1]广州市番禺区人民医院放射科,广东广州511400

出　　处：《实用放射学杂志》2010年第7期1022-1024,共3页Journal of Practical Radiology

基　　金：广州市番禺区科技计划项目（2007-Z-63-1）.

摘　　要：目的 探讨数字化乳腺普查摄影剂量最优化的应用价值.方法 抽查50例健康体检妇女连续3年的CR钼靶检查资料,常规摄取双侧乳腺轴位（CC）及外斜位（MLO）,技术参数：双侧乳房的压力、压迫厚度、角度、kV值、密度均相同,分别采用3种自动曝光控制模式（QUICK与AEC 或AEC与ACO或QUICK与ACO）进行曝光,对图像质量及入射剂量进行对比评价.结果 图像质量以退化型、腺体型的乳房腺体结构对比度较好,分辨率高,甲级片在76.8%以上.不同的自动曝光模式,曝光指数在正常的1800～2500范围内,用QUICK制式明显地降低入射体表剂量.结论 乳腺钼靶摄影要充分利用自动曝光控制模式,在保证照片质量同时,剂量优先是乳腺普查摄影中最重要的辐射防护要求.Objective To discuss the application of mammography screening dose optimization. Methods 50 cases of physical ex- amination for three consecutive years of women＇s CR mammography data,including bilateral breast axial （ CC） and oblique（MLO）, technical parameters：bilateral breast pressure, oppression thickness, angle, kV value and density were the same, respectively, using three kinds of automatic exposure control modes[ QUICK with the AEC or the AEC with the ACO or the QUICK and ACO） for ex- posure,comparative evaluation of image quality and the incident dose. Results The image quality was better and was of higher resolution in degeneration--type and gland--type structure of the breasts glands, the excellent rate of films were above 76.8%. Exposure index within the normal range of 1800~2500,with QUICK mode could significantly reduce the incidence surface dose. Conclusion Breast mammography make full use of automatic exposure control mode,at the same time to ensure image quality, dose priority is the most important of breast radiation protection requirements for mammography screening.

关 键 词：乳腺 计算机X线摄影 乳腺X线摄影 入射剂量 

分 类 号：R322.66[医药卫生—人体解剖和组织胚胎学] R814.41[医药卫生—基础医学]