Congress:
EuroSafe Imaging 2021
Keywords:
Breast, Radioprotection / Radiation dose, Mammography, Dosimetry, Radiation safety, Dosimetric comparison, Quality assurance
Authors:
W. Skrzyński, K. Pasicz, E. Fabiszewska
DOI:
10.26044/esi2021/ESI-13798
Results or findings
Obtained differences between displayed and calculated results varied between units and periods. The maximum average difference between displayed and calculated doses in a group of 50 patients was equal to 0.4 mGy (22% of the average calculated dose). Even smaller differences could strongly affect results of dose evaluation. For GE unit in November 2018, displayed AGD values did not exceed achievable levels in 91% of cases, while for calculated doses it was true only for 65% of cases (average dose difference was 0.17 mGy) (Figure 1).
Figure 2 presents a comparison of doses for two groups of patients examined on two different mammography units (Siemens Mammomat Inspiration and GE Pristina, July 2020), separately for displayed and calculated doses. For the displayed doses, the average and median are lower for the GE unit. The opposite is observed for calculated doses.