A Methodology for Obtaining the Mean Glandular Dose in Mammography Exams

7th Brazilian Congress on Metrology

Feital, J.C.^1 ; Delgado, J.U.^1 ; Lopes, R.T.^2

Radioprotection and Dosimetry Institute (IRD/CNEN), Brazil^1

COPPE/UFRJ, Brazil^2

关键词: Air kerma;    Average values;    Mammographic;    Mean glandular dose;    Measurements of;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/575/1/012026/pdf
DOI  :  10.1088/1742-6596/575/1/012026

来源: IOP

【 摘 要 】

This study proposes to validate measurements of mean glandular dose quantity (DG) for a given thickness and glandularity of compressed breast based in a PMMA phantom. 10 exposures were made in an ionization chamber in conventional mammographic equipment for a research. It obtained an average value for the incident air kerma, Ka,I 9.59 mGy leading to a DG = 1.82 mGy. Experimental results too were obtained for the acquisition of this quantity in other mammography clinics and these results were also reported and discussed. After the comparison of the results the methodology was validated.