Radiation dose analysis of dense breast in digital breast tomosynthesis
CHEN Xiao1, CAO Guoquan1,ZHOU Jiahuan2, LIN Xiaomin1, HE Wenwen1, ZHOU Bailin1.
1.Department of Radiology, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325015, China; 2.Department of Radiology, Yuyao Hospital of Traditional Chinese Medicine, Ningbo 315400, China
CHEN Xiao,CAO Guoquan,ZHOU Jiahuan, et al. Radiation dose analysis of dense breast in digital breast tomosynthesis[J]. JOURNAL OF WEZHOU MEDICAL UNIVERSITY, 2021, 51(10): 817-821.
Abstract：Objective: To analyze the radiation dose of dense breast in Digital Breast Tomosynthesis (DBT) and to explore the affecting factors. Methods: A retrospective analysis was performed on 804 sets of images of 201 female dense breast patients undergoing DBT examination from April 2019 to December 2019. Each set of images included DBT tomography and full-field digital mammography (FFDM) images. Photographic position, breast compression thickness, tube current, tube voltage, average glandular dose (AGD) and entrance surface dose (ESE), breast section size and breast density of patients were recorded at the post-processing station. The influence factors of radiation dose of dense mammary gland in DBT examination were analyzed by multi-factor variance and Pearson correlation. Results: Combined with DBT and FFDM images, there was statistical difference (P<0.05) in tube current, AGD and ESE among different gland compression thickness, breast section size and breast density. The thickness of glandular compression was highly correlated with ESE/AGD (r=0.97,P<0.01). Conclusion: When DBT examination is performed on patients with dense breast, the radiation dose,especially ESE, will be gradually up with the increase of breast thickness, size and density.
