Characterization of the response of the absorbed dose in water to the variation of radiodiagnostic energies for Fricke dosimeters prepared under the ISO/ASTM 51026:2015 standard.
Keywords:
Dosímetro, Dosis absorbida, Sistema dosimétrico FrickeLicense
Copyright (c) 2024 Laura Guerrero, Carlos Torres, Camilo Calderón, Fabián Aguirre, César Diaz, Luis Peña
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Abstract
The Fricke dosimeter is one of the most widely used chemical devices in different applications, both clinical and industrial. Recent studies show that it can be used as a primary reference standard in high dose rate brachytherapy. However, for applications in diagnostic radiology, there are very few studies on the response of Fricke solutions to typical average energies used in diagnostic radiology. In this sense, this article shows the results of the characterization of the response as a function of energy for Fricke dosimeters prepared according to the ISO/ASTM 51026:2015 standard, using the implemented RQR (Radiation Qualities radiology) beam qualities for radiodiagnosis. in the Secondary Dosimetric Calibration Laboratory of the Colombian Geological Service. The characterization of the response of the Fricke dosimeters was carried out by accumulating an absorbed dose of 10 Gy in water, previously measured by an ionization chamber. The average energy variations were made from 0.038 MeV to 0.067 MeV. The results obtained show differences of 5% to 80% of the average absorbed dose in water by the Fricke dosimeters, compared to the doses measured with the ionization chamber, for average energy variations used in radiodiagnosis.
References
G. Jayson, B. Parsons y A. Swallow, “The mecha-nism of the Fricke dosimeter”, International Journal for Radiation Physics and Chemistry, vol. 7, n.os 2-3, pp. 363-370, abr. 1975. https://doi.org/10.1016/0020-7055(75)90075-3
Standard practice for dosimetry in radiation process-ing, ISO/ASTM 52628, 2013.
C. E. de Almeida y C. Salata, “Absorbed dose to water standard for 192Ir HDR sources using Fricke Dosim-etry”, Revista Investigaciones y Aplicaciones Nucleares, vol. 4, nos 31-44, 2020. https://doi.org/10.32685/2590-7468/ invapnuclear.4.2020.565
P. H. Rosado, C. Salata, M. G. David et al. “Determination of the absorbed dose to water for medium‐energy xray beams using Fricke dosimetry”, Medical Physics, vol. 47, n.º 11, pp. 5802-5809, oct. 2020. https://doi.org/10.1002/mp.14473
Determinación de la dosis absorbida en radioterapia con haces externos: Un código de práctica internacional para la dosimetría basada en patrones de dosis absorbida en agua. Organismo Internacional de Energía Atómica (OIEA), Colección de Informes Técnicos n.º 398, Viena, abr. 2005.
Práctica para el uso del sistema de dosimetría Fricke, ISO/ASTM 51026, 2015.
O. Fregene, “Calibration of the ferrous sulfate dosimeter by ionometric and calorimetric methods for radiations of a wide range of energy”, Radiation Reserche, vol. 31,n. 2, jun. 1967, pp. 256-272.
C. E. Calderón, “Determinación de los parámetros característicos del haz de rayos X en radiodiagnóstico: Implementación calidad RQR 3”, Momento, vol. 58, 2019, pp. 89-102. https://doi.org/10.15446/mo.n58.73555
C. C., Cavinato y L. L. Campos, “Preliminary results on energy dependence of the fricke gel dosimeter for low energy x-radiation”, In: International Congress Of The International Radiation Protection Association, 12th, October 19-24, 2008, Buenos Aires, Argentina. Proceedings, 2008. http://repositorio.ipen.br/handle/123456789/13185
J. Hubbell y S. Seltzer, “Tables of X-ray mass attenuation coefficients and mass energy-absorption coeffi-cients 1 keV to 20 MeV for Elements Z = 1 to 92 and 48 Additional Substances of Dosimetric Interest”, NIST Physical Measurement Laboratory, 1995. http://phys-ics.nist.gov/PhysRefData/XrayMassCoef/cover.html
F. Pernička e I. D. McLean (dirs.), Dosimetry in diagnostic radiology: An international code of practic TeechnicalReports Series n.º 457. Viena: International Atomic Energy Agency, 2007. https://www-pub.iaea. org/MTCD/Publications/PDF/TRS457_web.pdf
P. Rosado, M. Nogueira, P. Squair et al.“Determination of the mean energy for attenuated and unattenuated IEC diagnostic X-ray beams”, International Nuclear Atlantic Conference (INAC), Santos, SP, Brasil, set.29-oct. 5, 2007. Associação Brasileira de Energia Nuclear (ABEN).
IEC, Equipement de diagnostic médical à rayonnement X: Conditions de rayonnement pour utilisation dans la détermination des caractéristiques,12. ª ed. Ginebra: IEC, 2005.