Conversion coefficients from fluence and air kerma to personal dose equivalent for monoenergetic photons using analytical fit and Monte Carlo simulation

• Autorzy: Al Kanti Hassan , El Hajjaji O. , El Bardouni T.

Identyfikatory

DOI

10.2478/pjmpe-2020-0004

• Języki publikacji: EN

Abstrakty

EN

The present study aims to calculate a new database of conversion coefficients from fluence and air Kerma to personal dose equivalent in two terms: absorbed dose and Kerma-approximations. In this work, we propose a new equation to perform an analytical fit of our Monte Carlo (MC) calculated conversion coefficients for photons for different angles. Also, we have calculated the conversion coefficients using the EGSnrc code. The conversion coefficients have been calculated for beams of monoenergetic photons from 0.015 to 10 MeV, incident on phantom ICRU for angles of incidence from 0° to a 75° in steps of 15°. Our computed values agree well when compared with those published for the ICRU 57 in Kerma-approximations with statistical uncertainties in the calculation around 2%. We can conclude from this work that the analytical approach is successful and powerful such as Monte Carlo methods to calculate the operational quantities.

Słowa kluczowe

EN

operational quantity; personal dose equivalent; conversion coefficient; fluence; air kerma; MC

• Wydawca: Polskie Towarzystwo Fizyki Medycznej ; De Gruyter
• Czasopismo: Polish Journal of Medical Physics and Engineering
• Rocznik: 2020
• Tom: Vol. 26, Iss. 1
• Strony: 31--44
• Opis fizyczny: Bibliogr. 21 poz., rys., tab.

Twórcy

autor

Al Kanti Hassan

• Radiations and Nuclear Systems Laboratory, Abdelmalek Essaadi University, Faculty of Sciences, Tetouan, Morocco

autor

El Hajjaji O.

• Radiations and Nuclear Systems Laboratory, Abdelmalek Essaadi University, Faculty of Sciences, Tetouan, Morocco

autor

El Bardouni T.

• Radiations and Nuclear Systems Laboratory, Abdelmalek Essaadi University, Faculty of Sciences, Tetouan, Morocco

Bibliografia

• [1] El Bardouni T, Mohammed M, Chakir E, et al. Conversion coefficients for photon exposure of the human lens eye: EGSnrc and MCNP6 Monte Carlo simulation. Radiat Phys Chem. 2019;156:159-168.
• [2] Wernli C. External Dosimetry: Operational Quantities and their Measurement. 11th International Congress of the International Radiation Protection Association (IRPA), Madrid, 2004.
• [3] Zhang B, Dang B, Wang Z, et al. The local skin dose conversion coefficients of electrons, protons and alpha particles calculated using the Geant4 code. Radiat Prot Dosimetry. 2013;156(4):514-517.
• [4] Rosado PHG, Nogueira MS, Genezini F, Vilela EC. Measurement of conversion coefficients between free in air kerma and personal dose equivalent for diagnostic X-ray beams. Radiat Meas. 2008;43(2-6):968-971.
• [5] Al Kanti H, El Hajjaji O, El Bardouni T. Personal Dose Equivalent Conversion Coefficients Skins Dose for Mono-Energetic Photons, Electrons, and Positrons: Monte Carlo Approach and Development of an Analytical Approach. Moscow Univ Phys Bull. 2019;74(5):520-528.
• [6] Petoussi-Henss N, Bolch WE, Eckerman KF, et al. Conversion Coefficients for Radiological Protection Quantities for External Radiation Exposures. Ann ICRP;2010;40(2-5):1-257.
• [7] Institut de Radioprotection et de Sûreté Nucléaire (IRSN). Publication 103 de la CIPR. Recommandations 2007 de la Commission internationale de protection radiologique. 2009.
• [8] Daures J, Gouriou J, Bordy JM. Monte Carlo determination of the conversion coefficients Hp(3)/Ka in a right cylinder phantom with “PENELOPE” code. Comparison with “MCNP” simulations. Radiat Prot Dosimetry. 2011;144(1-4):37-42.
• [9] Hörnlund M. Estimation of dose conversion factors. Conversion factors from measurable to risk related quatities. Master Sci Thesis. Lund University and University of Gothenburg. 2013.
• [10] Rogers DQO, Kawrakow I, Seuntjens JP, et al. Technical Report PIRS-702: NRC User Codes for EGSnrc. National Research Council Canada, Ottawa, Canada. 2017.
• [11] Kim JH, Hill R, Kuncic Z. An evaluation of calculation parameters in the EGSnrc/BEAMnrc Monte Carlo codes and their effect on surface dose calculation. Phys Med Biol. 2012;57(14):N267-N278.
• [12] Kawrakow I, Mainegra-Hing E, Rogers DWO, et al. Technical Report PIRS-701. The EGSnrc Code System: Monte Carlo Simulation of Electron and Photon Transport. National Research Council Canada, Ottawa, Canada. 2017.
• [13] ICRP. Conversion Coefficients for use in Radiological Protection against External Radiation. ICRP Publication 74. Ann ICRP. 1996;26(3-4).
• [14] ICRU Report 57. Conversion Coefficients for use in Radiological Protection Against External Radiation. 1997.
• [15] Al Kanti A, El Hajjaji O, El Bardouni T, Mohammed M. An analytical fit and EGSnrc code (MC) calculations of personal dose equivalent conversion coefficients for mono-energetic electrons. Appl Radiat Isot. 2019;154:108906.
• [16] Antoni R, Bourgois L. Physique appliquée à l’exposition externe: Dosimétrie et radioprotection. Springer, 2013.
• [17] Mayles P, Nahum A, Rosenwald C. Handbook of Radiotherapy Physics: Theory and Practice. 2007.
• [18] Al Kanti H, El Hajjaji O, El Bardouni T, et al. Conversion coefficients calculation of mono-energetic photons from air-kerma using Monte Carlo and analytical methods. J King Saud Univ - Sci. 2018;32(1):288-293.
• [19] Lienard A. Organ dose conversion coefficients for pediatric reference computational phantoms in external photon radiation fields. Thesis. Georgetown University. 2015.
• [20] Attix FH. Introduction to Radiological Physics and Radiation Dosimetry. Wiley-VCH. 1986.
• [21] Attix FH. Comparison of Monte Carlo and analytical calculations of average dose deposited in aluminum foils by broad beams of electrons. Int J Radiat Appl Instrumentation. Part A. Appl Radiat Isot. 1991:42(10):953-964.

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).