Impact factors of average glandular dose of full field digital mammography and digital breast tomosynthesis under breast Combo mode
10.13929/j.issn.1672-8475.2025.04.008
- VernacularTitle:乳腺Combo模式下全视野数字化乳腺摄影及数字乳腺体层合成平均腺体剂量的影响因素
- Author:
Junli MA
1
;
Ying FAN
;
Xuan WANG
;
Jingyao ZHENG
;
Zhijun WANG
;
Ping HE
Author Information
1. 石嘴山市第一人民医院放射科,宁夏石嘴山 753200
- Publication Type:Journal Article
- Keywords:
breast;
mammography;
full field digital mammography;
radiation dosage
- From:
Chinese Journal of Interventional Imaging and Therapy
2025;22(4):267-272
- CountryChina
- Language:Chinese
-
Abstract:
Objective To observe impact factors of average glandular dose(AGD)of full field digital mammography(FFDM)and digital breast tomosynthesis(DBT)under breast Combo mode.Methods Totally 169 subjects who received FFDM and DBT under Combo mode were collected retrospectively.The breast compression thickness,tube voltage,tube current and AGD of FFDM and DBT exposure at cranio-caudal(CC)and mediolateral oblique(MLO)positions of bilateral breast were recorded.FFDM or DBT exposure conditions and AGD among different breast compression thickness and breast types were compared,and their correlations were analyzed.The impacts of breast compression thickness and breast density on AGD of FFDM or DBT were observed.Results There were significant differences in tube voltage,tube current and AGD of FFDM or DBT among different breast compression thicknesses(all P＜0.001).With the increase of breast compression thickness,tube voltage,tube current and AGD of FFDM or DBT all increased(all P＜0.001).There were statistical differences in breast compression thickness,tube voltage,tube current and AGD of FFDM or DBT among different types breast(all P＜0.001).Hierarchical analysis showed that,when breast compression thickness was＜50 mm,50-59 mm and＞59 mm respectively,statistical differences in AGDFFDM and AGDDBT among different breast types at CC or MLO positions were found(all P＜0.001).Under the same breast compression thickness,tube current,AGDFFDM and AGDDBT of FFDM or DBT all increased with the increase of breast density(all P＜0.001),while tube voltage of FFDM or DBT had no obvious change(all P＞0.05).Breast compression thickness and breast density were both independent factors of AGD of FFDM or DBT(all P＜0.001).Conclusion Under breast Combo mode,breast compression thickness and gland density both had impacts on AGD of FFDM or DBT,and the former had more significant impact on AGD.
