Correlation of average glandular dose with categories of breast composition and breast compressed thickness in digital breast tomosynthesis
LIANG Xie
QIN Geng-geng
CAI Yu-xing
CHEN Wei-guo
Abstract：Objective To investigate the correlation of average glandular dose ( AGD) with categories of breast composition and breast compressed thickness in digital breast tomosynthesis ( DBT) , and to compare the average glandular dose between DBT and FFDM .Methods 520 patients received a serial scan of DBT before FFDM under the same pres-sure condition with AEC mode .AGD during DBT was compared among 4 categories of breast composition within the same breast compressed thickness .AGD during DBT and FFDM was also compared under the same pressure condition .Results Of 520 cases, 4 cases were of the fatty type , 96 cases were of the fibroglandular density type , 308 cases were of the het-erogeneously dense type , and 112 cases were of the extremely dense type .With the same thickness , the AGD is highest in the extremely dense type and lowest in the fatty type , during both FFDM and DBT .Under the same pressure condition , AGD was (1.50 ±0.40) mGy in FFDM and (1.66 ±0.24) mGy in DBT (P<0.01).Conclusion AGD rises with breast compression thickness and density in both FFDM and DBT .In the same compression status , AGD of DBT is higher than FFDM.
Keywords：digital breast tomosynthesiscategories of breast compositionaverage glandular dose
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 2969-2971 )