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A feasibility study on the use of phantoms with statistical lung masses for determining the uncertainty in the dose absorbed by the lung from broad beams of incident photons and neutrons

Author:
عطیه ابراهیمی خانکوک
,
سیدهاشم میری حکیم آباد
,
لاله رفعت متولی
,
Atiyeh Ebrahimi Khankook
,
Seyyed Hashem Miri Hakimabad
,
Laleh Rafat Motavali
Year
: 2017
Abstract: Computational models of the human body have gradually become crucial in the evaluation of doses absorbed by organs. However, individuals may differ considerably in terms of organ size and shape. In this study, the authors sought to determine the energy-dependent standard deviations due to lung size of the dose absorbed by the lung during external photon and neutron beam exposures. One hundred lungs with different masses were prepared and located in an adult male International Commission on Radiological Protection (ICRP) reference phantom. Calculations were performed using the Monte Carlo N-particle code version 5 (MCNP5). Variation in the lung mass caused great uncertainty: ~90% for low-energy broad parallel photon beams. However, for high-energy photons, the lung-absorbed dose dependency on the anatomical variation was reduced to <1%. In addition, the results obtained indicated that the discrepancy in the lung-absorbed dose varied from 0.6% to 8% for neutron beam exposure. Consequently, the relationship between absorbed dose and organ volume was found to be significant for low-energy photon sources, whereas for higher energy photon sources the organ-absorbed dose was independent of the organ volume. In the case of neutron beam exposure, the maximum discrepancy (of 8%) occurred in the energy range between 0.1 and 5 MeV.
URI: http://libsearch.um.ac.ir:80/fum/handle/fum/3360941
Keyword(s): statistical phantom,lung-absorbed dose,broad parallel beams,MCNP5,mono-energetic photon

and neutron exposures
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    A feasibility study on the use of phantoms with statistical lung masses for determining the uncertainty in the dose absorbed by the lung from broad beams of incident photons and neutrons

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contributor authorعطیه ابراهیمی خانکوکen
contributor authorسیدهاشم میری حکیم آبادen
contributor authorلاله رفعت متولیen
contributor authorAtiyeh Ebrahimi Khankookfa
contributor authorSeyyed Hashem Miri Hakimabadfa
contributor authorLaleh Rafat Motavalifa
date accessioned2020-06-06T13:35:14Z
date available2020-06-06T13:35:14Z
date issued2017
identifier urihttp://libsearch.um.ac.ir:80/fum/handle/fum/3360941
description abstractComputational models of the human body have gradually become crucial in the evaluation of doses absorbed by organs. However, individuals may differ considerably in terms of organ size and shape. In this study, the authors sought to determine the energy-dependent standard deviations due to lung size of the dose absorbed by the lung during external photon and neutron beam exposures. One hundred lungs with different masses were prepared and located in an adult male International Commission on Radiological Protection (ICRP) reference phantom. Calculations were performed using the Monte Carlo N-particle code version 5 (MCNP5). Variation in the lung mass caused great uncertainty: ~90% for low-energy broad parallel photon beams. However, for high-energy photons, the lung-absorbed dose dependency on the anatomical variation was reduced to <1%. In addition, the results obtained indicated that the discrepancy in the lung-absorbed dose varied from 0.6% to 8% for neutron beam exposure. Consequently, the relationship between absorbed dose and organ volume was found to be significant for low-energy photon sources, whereas for higher energy photon sources the organ-absorbed dose was independent of the organ volume. In the case of neutron beam exposure, the maximum discrepancy (of 8%) occurred in the energy range between 0.1 and 5 MeV.en
languageEnglish
titleA feasibility study on the use of phantoms with statistical lung masses for determining the uncertainty in the dose absorbed by the lung from broad beams of incident photons and neutronsen
typeJournal Paper
contenttypeExternal Fulltext
subject keywordsstatistical phantomen
subject keywordslung-absorbed doseen
subject keywordsbroad parallel beamsen
subject keywordsMCNP5en
subject keywordsmono-energetic photon

and neutron exposures
en
journal titleJournal of Radiation Researchfa
pages313-328
journal volume58
journal issue3
identifier linkhttps://profdoc.um.ac.ir/paper-abstract-1063125.html
identifier articleid1063125
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