Average Absorbed Breast Dose (2ABD) to Mean Glandular Dose (MGD) Conversion Function for Digital Breast Tomosynthesis: A New Approach

Archives of Breast Cancer

article

‪Raffaele M Tucciariello¹  Rocco Lamastra¹  Patrizio Barca²  Marine Evelina Fantacci³  Antonio C Traino⁴ 

[1] Medical Physics Unit, St.Chiara University Hospital;Department of Medical Physics, St. Orsola-Malpighi University Hospital;Department of Physics, University of Pisa;National Institute for Nuclear Physics ,(INFN), Pisa Section

关键词: Digital breast tomosybthesis;    Breast dosimetry;    Absorbed breast dose;    Mean glandular dose;    Average glandular dose;   

DOI  :  10.32768/abc.202183183-191

学科分类：社会科学、人文和艺术（综合）

来源: Kaviani Breast Disease Institute

【 摘 要 】

Background: In this work a new method for the Mean Glandular Dose evaluation in digital breast tomosynthesis (DBT) is presented. Methods: Starting from the experimental-based dosimetric index, 2ABD, which represents the average absorbed breast dose, the mean glandular dose MGD2ABD was calculated using a conversion function of glandularity f(G), obtained through the use of Monte Carlo simulations.Results: f(G) was computed for a 4.5 cm thick breast: from its value MGD2ABD for different compressed breast thicknesses and glandularities was obtained. The comparison between MGD2ABD estimates and the dosimetric index provided in the current dosimetry protocols, following the Dance's approach, MGDDance, showed a good agreement (<10%) for all the analyzed breast thicknesses and glandularities. Conclusion: The strength of the proposed method can be considered an accurate mean glandular dose assessment starting from few and accessible parameters, reported in the header DICOM of each DBT exam.

【 授权许可】

CC BY-NC