Patient-specific phantoms versus reference phantoms: a preliminary comparison on organs dose distribution
DOI:
https://doi.org/10.15392/bjrs.v6i2A.504Keywords:
patient-specific phantom, reference phantom, absorbed dose.Abstract
Discrepancies between ICRP phantoms and real patients lead to disparities on patient-dose estimations. This paper aims to compare distribution of dose in organs of male/female individualized-phantoms and ICRP reference phantoms. The absorbed dose estimation was performed using the EGSnrc Monte Carlo code and a parallel source algorithm. In this work were used an individualized-phantom for a man (1.73m/70.3kg) and another for a woman (1.63m/60.3kg) and the male and female ICRP reference phantoms. The comparison of the absorbed dose from each phantom gender was performed using the relative error. The results were expressed in terms of conversion coefficients to brain, lungs, liver and kidneys. The greatest absolute relative error between the organs of the patient-specific and the reference phantom was 22.92% in the liver and 62.84% in the kidneys, respectively for man and woman. There are errors that cannot be disregarded. This paper shows the need for a specific study for each patient or for the population of each country, since there are different body types, which affects the distribution of the organ doses.
- Views: 105
- PDF Downloads: 53
Downloads
References
VIEIRA, J. W. Construção de um Modelo Computacional de exposição para cálculos dosimétricos utilizando o código Monte Carlo EGS4 e fantomas de voxels. Tese de Doutorado, PROTEN, UFPE, Recife, Pernambuco, 2004, 101 p.
INTERNATIONAL COMMISSION ON RADIOLOGICAL PROTECTION. Adult Reference Computational Phantoms. ICRP Publication 110. Oxford, 2009.
INTERNATIONAL COMMISSION ON RADIOLOGICAL PROTECTION. Basic Anatomical and Physiological Data for Use in Radiological Protection Reference Values. ICRP Publication 89. Oxford, 2002.
VIEIRA, J. W.; LIMA, F. R. A. A software to digital image processing to be used in the voxel phantom development. Cellular and Molecular Biology, v. 15, n. 55(3), p. 16-22, 2009.
REYNAERT, N.; SCHAART, D. R.; Van der ZEE, W.; Van VLIETVROEGINDE-WEIJ, C.; TOMSEJ, M.; JANSEN, J.; HEIJMEN, B.; COGHE, M.; de WAGTER, C. Monte Carlo Treatment Planning for Photon and Electron Beams. Radiation Physics and Chemistry, v. 76, 2007.
KAWRAKOW, I.; ROGERS, D. W. O.; TESSIER, F.; WALTERS, B. R. B. The EGSnrc Code System: Monte Carlo Simulation of Electron and Photon Transport. NRCC Report PIRS-701. National Research Council of Canada, Ottawa, K1A OR6, 2013, 311 p.
LAMART, S.; BOUVILLE, A.; SIMON, S. L.; ECKERMAN, K. F.; MELO, D.; LEE, C. Comparison of Internal Dosimetry Factors for Three Classes of Adult Computational Phantoms with Emphasis on I-131 in the Thyroid. Physics in Medicine and Biology, v. 56, n. 22, p. 7317-35, 2011,
Published
How to Cite
Issue
Section
Categories
License
Copyright (c) 2021 Brazilian Journal of Radiation Sciences
This work is licensed under a Creative Commons Attribution 4.0 International License.
Licensing: The BJRS articles are licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
