数字乳腺断层摄影技术的辐射剂量分析  

An analysis of radiation dose of digital breast tomosynthesis

作　　者：沈茜刚 顾雅佳[1,2] 郑晓静 吴坚[1,2] 鲍文宪 肖勤 彭卫军 SHEN Xigang;GU Yajia;ZHENG Xiaojing;WU Jian;BAO Wenxian;XIAO Qin;PENG Weijun(Department of Radiology,Fudan University Shanghai Cancer Center;Department of Oncology,Shanghai Medical College,Fudan University,Shanghai 200032,China)

机构地区：[1]复旦大学附属肿瘤医院放射诊断科 [2]复旦大学上海医学院肿瘤学系,上海200032

出　　处：《肿瘤影像学》2019年第1期21-26,共6页Oncoradiology

摘　　要：目的:探讨数字乳腺断层摄影(digital breast tomosynthesis,DBT)与全数字化乳腺X线摄影(full-field digital mammography,FFDM)的平均腺体剂量(average gland dose,AGD)差异。方法:收集2016年7—9月临床可触及乳腺肿块于复旦大学附属肿瘤医院进行乳腺X线摄影检查的患者共209例,其中100例入组DBT-HR模式行FFDM和DBT的大角度曝光,109例入组DBT-ST模式行FFDM和DBT的小角度曝光,比较DBT-HR与DBT-ST两种模式的AGD均值差异。结果:DBTHR模式组头尾位(cranio-caudal view,CC)、内外侧斜位(medial lateral oblique view,MLO)的DBT与FFDM的AGD均值差异有统计学意义。DBT-ST模式组CC、MLO的DBT与FFDM的AGD均值差异无统计学意义。DBT-HR与DBT-ST模式CC、MLO的FFDM的AGD均值差异无统计学意义,DBT的AGD均值差异有统计学意义。结论:采用DBT-ST模式时,DBT与FFDM的AGD均值差异无统计学意义;采用DBT-HR模式时,DBT的AGD均值高于FFDM的AGD均值,但仍在规定的辐射剂量范围内,因此DBT是一种安全、可靠的检查技术。Objective: To discuss the average gland dose(AGD) of digital breast tomosynthesis(DBT) and full-field digital mammography(FFDM). Methods: A total of 209 cases with clinically palpable breast masses who received mammography examination in Fudan University Shanghai Cancer Center from Jul. to Sep. 2016 were selected. Among them, 100 cases were enrolled in DBT-HR mode to be exposed to FFDM and high-angle DBT, and 109 cases were enrolled in DBT-ST mode to be exposed to FFDM and small-angle DBT. The difference in AGD between DBT-HR mode and DBT-ST mode was analyzed. Results: There was statistically significant difference in AGD in cranio-caudal view(CC) and medial lateral oblique view(MLO) between DBT and FFDM in DBT-HR mode group. But there was no statistically significant difference in AGD of CC and MLO between DBT and FFDM in DBT-ST mode group. AGD of FFDM in CC and MLO was not significantly different between DBT-HR mode and DBTST mode, but AGD of DBT was significantly different. Conclusion: In DBT-ST mode, there is no difference in AGD of DBT and FFDM. In DBT-HR mode, AGD of DBT is higher than that of FFDM, but still in the prescribed radiation dose range. DBT is a safe and reliable examination technology.

关 键 词：数字乳腺 断层摄影 乳腺X线摄影 平均腺体剂量 

分 类 号：R737.9[医药卫生—肿瘤] R730.44[医药卫生—临床医学]