نبذة مختصرة : The effect of mammography measurement conditions was investigated to evaluate their impact on measurement uncertainties in clinical practice. The most prominent physical X-ray beam quantities i.e., − air kerma, half-value layer, and X-ray tube voltage − were examined by measuring the response of two ionization chambers and six X-ray multimeters (XMMs) of different models. Measurements were performed using several anode/filter combinations and both with and without the compression paddle in the X-ray beam. Maximum differences of higher than 6 % were found for all quantities when the dosimeter displayed value was compared with the reference value or the variation within the clinical anode/filter combinations Mo/Mo and Mo/Rh were considered. The study showed that the calibration procedure with the W/Al anode/filter combination was reliable only for ionization chambers, and the response of XMMs varies in such a way that the calibration coefficient cannot be predicted between various measurement conditions used in calibration and clinical practices. XMM calibrations are typically performed without a compression paddle in the beam, and the response of the XMM changes when radiation quality is slightly altered. If XMM specific data is not available, based on this study, an additional uncertainty of 2 % (k = 1) could be used as a typical estimate, at least for air kerma measurements. XMMs should be used for clinical measurements in mammography only with correct settings. If the correct settings are not available, the XMMs should not be used or used only with extreme caution. ; Peer reviewed
Relation: This study was financed in part by the Coordena\u00E7\u00E3o de Aperfei\u00E7oamento de Pessoal de N\u00EDvel Superior - Brazil (CAPES) - Finance Code 001 (M. Costa de Castro). It was also partly funded through EURAMET 22NRM01 TraMeXI project by the European Partnership on Metrology, co-financed from the European Union\u2019s Horizon Europe Research and Innovation Programme and by the Participating States. The research is also related to the project IAEA CRP E24024. EURAMET Mentoring Scheme project between STUK and ENEA was used to get support for the spectrometry measurements. The authors acknowledge Jaroslav \u0160olc for the support and contribution during the measurements with the CdTe spectrometer at STUK. This study was financed in part by the Coordena\u00E7\u00E3o de Aperfei\u00E7oamento de Pessoal de N\u00EDvel Superior - Brazil (CAPES) - Finance Code 001 (M. Costa de Castro). It was also partly funded through EURAMET 22NRM01 TraMeXI project by the European Partnership on Metrology, co-financed from the European Union's Horizon Europe Research and Innovation Programme and by the Participating States. The research is also linked with a Coordinated Research Project funded by the International Atomic Energy Agency (E24024). EURAMET Mentoring Scheme project between STUK and ENEA was used to get support for the spectrometry measurements. The authors acknowledge Jaroslav \u0160olc for the support and contribution during the measurements with the CdTe spectrometer at STUK.; Costa de Castro , M , Toroi , P , Kortesniemi , M , Lindholm , C , Pinto , M , Rinaldi , L , Tietäväinen , A , Tikkanen , J & Živanović , M 2024 , ' Impact of the measurement conditions and compression paddle on mammography dosimeter response ' , Physica Medica , vol. 123 , 103405 . https://doi.org/10.1016/j.ejmp.2024.103405; http://hdl.handle.net/10138/577706; 85195645135; 001253641400001
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