QUALITY CONTROL TESTS FOR CALIBRATION OF KAP METERS.
DOI:
https://doi.org/10.15392/2319-0612.2024.2687Keywords:
PKA Meters Calibration, Ionization Radiation Metrology, Quality Control Tests, Dosimetry SystemsAbstract
In accordance with IEC 60580:2021, KAP meters are typically calibrated using cylindrical reference ionization chambers aligned with RQR radiation qualities specified by ISO 61267. However, discrepancies in manufacturing geometry between these reference chambers and PKA meters prompted a series of quality control tests to establish an effective calibration methodology. Two distinct tests of quality control were conducted to compare the performance of a reference KAP meter (PDC - Radcal®) with a reference ionization chamber (Radcal® 10x5-180), using the Agfa® PANTAK Constant Potential X-Ray System. These tests included homogeneity assessments with varying horizontal displacements of the reference PDC meter and reproducibility tests at consistent positions. The two tests were conducted for Kerma and PKA unities. A third test is still in progress, the long-term stability, with repeated measurements; as with the tests ago, for Kerma and KAP measurements. These results demonstrated good correlation and traceability between the PDC and the ionization chamber, with reproducibility and homogeneity within an uncertainty margin below 3 %. These findings validate the proposed calibration method for practical applications.Downloads
References
[1] COSTA, NA., 2013. Desenvolvimento De Uma Metodologia De Calibração E Testes De Medidores Do Produto Kerma-Área [dissertation]. Instituto de Pesquisas Energéticas e Nucleares. In: Master Science Degree in Nuclear Technology, São Paulo, Brasil. 2013. Available from: https://doi.org/10.11606/D.85.2013.tde-14082013-144903 DOI: https://doi.org/10.11606/D.85.2013.tde-14082013-144903
[2] COSTA, NA.; POTIENS, M.P.A. “Aperfeiçoamento de um Programa de Controle de Qualidade do Patient dose Calibrator de Acordo com a Norma IEC 60580”. IX Latin American IRPA Regional Congress on Radiation Protection and Safety - IRPA 2013, Rio de Janeiro, RJ, Brazil, SOCIEDADE BRASILEIRA DE PROTEÇÃO RADIOLÓGICA – SBPR. April 15-19, 2013. Available from: https://www.sbpr.org.br/old/web/irpa13/AnaisdoIRPA2013/InstrumentacionNuclearyDosimetria/2957.pdf
[3] VANO, E; SÁNCHEZ, RM; FERNÁNDEZ, JM. et al. “Conversion factors to estimate effective doses from kerma area product in interventional cardiology. Impact of added filtration”. Physica Medica. 2019;68: 104–111. Available from: https://doi.org/10.1016/j.ejmp.2019.11.013 DOI: https://doi.org/10.1016/j.ejmp.2019.11.013
[4] DELAKIS, I., KELLY, C.. “Use of weight--based vs age--based groupings in the study of typical values of air kerma area product (PKA) for paediatric radiographs of chest and abdomen”. The British Institute of Radiology. BJR. 2021; 94: 1–6. Available from: https://pmc.ncbi.nlm.nih.gov/articles/PMC8553206/pdf/bjr.20210331.pdf DOI: https://doi.org/10.1259/bjr.20210331
[5] SULIMAN, II. An approach for the online determination of Entrance Surface Air Kerma (ESAK) from Kerma Area product (PKA) in digital radiology. Phys Eng Sci Med 45, 1055–1061 (2022). https://doi.org/10.1007/s13246-022-01167-7 DOI: https://doi.org/10.1007/s13246-022-01167-7
[6] International Electrotechnical Commission (IEC), 2019. Medical Electrical Equipment – Dose Area Product Meters. IEC 60580. Geneva. Available from: https://webstore.iec.ch/preview/info_iec60580%7Bed3.0%7Db.pdf
[7] International Electrotechnical Commission (IEC), 2005. Medical Diagnostic X-rays Equipment – Radiation Conditions for Use in the Determination of Characteristics. IEC 61267. Geneva.
[8] ALMEIDA JR., J. N.; SILVA, M. C.; TERINI, R. A.; HERDADE, S. B. Calibration of PKA meters Against ion chambers of two geometries. Revista Brasileira de Física Médica, São Paulo, v. 5, n. 1, p. 15-20, 2011. Disponível em: https://www.rbfm.org.br/rbfm/article/view/115/v5n1p15.
[9] RADCAL CORPORATE, Technical Specifications of 10X5 Chambers, Monrovia, CA – USA. June, 2016. Available at https://www.radcal.com/pdf/ew-10x5-chamber-spec-11-2-6.pdf .
[10] INTERNATIONAL ELECTROTECHNICAL COMMISSION (IEC) (2019) Dose Area Product Meters, IEC 60580, 2nd. Ed. IEC, Geneva.
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Copyright (c) 2025 José Neres de Almeida Junior, Maria da Penha Albuquerque Potiens, Orlando Rodrigues Junior
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