Teles, P.* ; Mendes, M.* ; Zankl, M. ; de Sousa, V.* ; Santos, A.I.* ; Vaz, P.*
Assessment of the absorbed dose in the kidney of nuclear nephrology paediatric patients using ICRP biokinetic data and Monte Carlo simulations with mass-scaled paediatric voxel phantoms.
Radiat. Prot. Dosim. 174, 121-135 (2017)
The aim of this work is to use Monte Carlo simulations and VOXEL phantoms to estimate the absorbed dose in paediatric patients (aged from 2 weeks to 16 y), with normal renal function, to whom technetium-99m-dimercaptosuccinic acid ((99m)Tc-DMSA) was administered, for diagnostic renal scintigraphy purposes; and compare them with values obtained using the International Commission on Radiological Protection (ICRP) methodology. In the ICRP methodology, the cumulated absorbed dose in the kidneys is estimated by multiplying the administered activity with the corresponding given dose coefficients. The other methods were based on Monte Carlo simulations performed on two paediatric voxel phantoms ( ITALIC! CHILDand ITALIC! BABY), and another three phantoms, which were modified to suit the mass of the patients' kidneys, and other anatomical factors. Different ITALIC! S-values were estimated using this methodology, which together with solving the ICRP biokinetic model to determine the cumulated activities, allowed for the estimation of absorbed doses different from those obtained with the ICRP method, together with new dose coefficients. The obtained values were then compared. The deviations suggest that the ITALIC! S-values are strongly dependent on the patient's total body weight, which could be in contrast with the ICRP data, which is provided by age, regardless of other anatomical parameters.
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Publication type
Article: Journal article
Document type
Scientific Article
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Keywords
Reference Computational Phantoms; Internal Dosimetry; Children; Radiopharmaceuticals; Technetium-99m-dmsa
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Publication Year
2017
Prepublished in Year
2016
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2016
ISSN (print) / ISBN
0144-8420
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1742-3406
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Volume: 174,
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Pages: 121-135
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Oxford University Press
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Oxford
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Peer reviewed
POF-Topic(s)
30504 - Mechanisms of Genetic and Environmental Influences on Health and Disease
Research field(s)
Radiation Sciences
PSP Element(s)
G-501100-001
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Erfassungsdatum
2016-05-12