The comparison of Monte Carlo simulations with GEANT4 for polyethylene absorber within the pCT development
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | , , , , , , , , , |
Tipo de documento: | Artigo de conferência |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://hdl.handle.net/11449/221163 |
Resumo: | Proton beams in medical applications deal with relatively thick targets like the human head or trunk. Thus, the fidelity of proton computed tomography (pCT) simulations as a tool for proton therapy planning depends in general case on the accuracy of results obtained for the proton interaction with thick absorbers. As we previously showed it, the GEANT4 simulations of proton energy spectra after thick absorbers do not agree well with existing experimental data. Moreover, the spectra simulated for the Bethe-Bloch domain showed an unexpected sensitivity to the choice of low-energy electromagnetic models during the code execution. These observations were done with the GEANT4 version 8.2 during our previous simulations for pCT. As the most probable reasons for these effects is some specific feature in the code, or some specific implicit parameters in the GEANT4 manual, we continued our study with versions 9.2 and 9.4 of the code. This work describes in more details the simulations of the 25 MeV protons passing through 6mm polyethylene absorber. The simulations were done by modifying only the geometry in the Hadrontherapy Example, and for all available choices of the Electromagnetic Physics Models. The results were compared with our previous simulation, with theoretical predictions and with experimental data. Some variations in comparison with our previous results were obtained. The simulations were performed considering further applications for pCT development. |
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The comparison of Monte Carlo simulations with GEANT4 for polyethylene absorber within the pCT developmentProton beams in medical applications deal with relatively thick targets like the human head or trunk. Thus, the fidelity of proton computed tomography (pCT) simulations as a tool for proton therapy planning depends in general case on the accuracy of results obtained for the proton interaction with thick absorbers. As we previously showed it, the GEANT4 simulations of proton energy spectra after thick absorbers do not agree well with existing experimental data. Moreover, the spectra simulated for the Bethe-Bloch domain showed an unexpected sensitivity to the choice of low-energy electromagnetic models during the code execution. These observations were done with the GEANT4 version 8.2 during our previous simulations for pCT. As the most probable reasons for these effects is some specific feature in the code, or some specific implicit parameters in the GEANT4 manual, we continued our study with versions 9.2 and 9.4 of the code. This work describes in more details the simulations of the 25 MeV protons passing through 6mm polyethylene absorber. The simulations were done by modifying only the geometry in the Hadrontherapy Example, and for all available choices of the Electromagnetic Physics Models. The results were compared with our previous simulation, with theoretical predictions and with experimental data. Some variations in comparison with our previous results were obtained. The simulations were performed considering further applications for pCT development.Instituto Politécnico da Universidade do Estado do Rio de Janeiro, Rua Alberto Rangel, s/nUniversidade Tecnológica Federal do Paraná, Av. Sete de Setembro 3165Centro de Aplicaciones Tecnologicas y Desarrollo NuclearInstituto de Biociências de Botucatu da UNESP, Distrito de Rubião Jr. s/nºLaboratório de Instrumentação Nuclear COPPE UFRJ, Av. Horácio Macedo 2030Instituto de Biociências de Botucatu da UNESP, Distrito de Rubião Jr. s/nºUniversidade do Estado do Rio de Janeiro (UERJ)Universidade Tecnológica Federal do ParanáCentro de Aplicaciones Tecnologicas y Desarrollo NuclearUniversidade Estadual Paulista (UNESP)Universidade Federal do Rio de Janeiro (UFRJ)Yevseyeva, OlgaDe Assis, Joaquim T.Ievsieieva, IevgeniiaEvseev, IvanSchelin, Hugo R.Milhoretto, EdneyAhmann, FranciellePaschuk, Sergei A.Díaz, Katherin S.Hormaza, Joel M. [UNESP]Lopes, Ricardo T.2022-04-28T19:11:05Z2022-04-28T19:11:05Z2011-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectProceedings of Science, v. 142.1824-8039http://hdl.handle.net/11449/2211632-s2.0-85053308431Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengProceedings of Scienceinfo:eu-repo/semantics/openAccess2022-04-28T19:11:05Zoai:repositorio.unesp.br:11449/221163Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T19:53:08.078942Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
The comparison of Monte Carlo simulations with GEANT4 for polyethylene absorber within the pCT development |
title |
The comparison of Monte Carlo simulations with GEANT4 for polyethylene absorber within the pCT development |
spellingShingle |
The comparison of Monte Carlo simulations with GEANT4 for polyethylene absorber within the pCT development Yevseyeva, Olga |
title_short |
The comparison of Monte Carlo simulations with GEANT4 for polyethylene absorber within the pCT development |
title_full |
The comparison of Monte Carlo simulations with GEANT4 for polyethylene absorber within the pCT development |
title_fullStr |
The comparison of Monte Carlo simulations with GEANT4 for polyethylene absorber within the pCT development |
title_full_unstemmed |
The comparison of Monte Carlo simulations with GEANT4 for polyethylene absorber within the pCT development |
title_sort |
The comparison of Monte Carlo simulations with GEANT4 for polyethylene absorber within the pCT development |
author |
Yevseyeva, Olga |
author_facet |
Yevseyeva, Olga De Assis, Joaquim T. Ievsieieva, Ievgeniia Evseev, Ivan Schelin, Hugo R. Milhoretto, Edney Ahmann, Francielle Paschuk, Sergei A. Díaz, Katherin S. Hormaza, Joel M. [UNESP] Lopes, Ricardo T. |
author_role |
author |
author2 |
De Assis, Joaquim T. Ievsieieva, Ievgeniia Evseev, Ivan Schelin, Hugo R. Milhoretto, Edney Ahmann, Francielle Paschuk, Sergei A. Díaz, Katherin S. Hormaza, Joel M. [UNESP] Lopes, Ricardo T. |
author2_role |
author author author author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade do Estado do Rio de Janeiro (UERJ) Universidade Tecnológica Federal do Paraná Centro de Aplicaciones Tecnologicas y Desarrollo Nuclear Universidade Estadual Paulista (UNESP) Universidade Federal do Rio de Janeiro (UFRJ) |
dc.contributor.author.fl_str_mv |
Yevseyeva, Olga De Assis, Joaquim T. Ievsieieva, Ievgeniia Evseev, Ivan Schelin, Hugo R. Milhoretto, Edney Ahmann, Francielle Paschuk, Sergei A. Díaz, Katherin S. Hormaza, Joel M. [UNESP] Lopes, Ricardo T. |
description |
Proton beams in medical applications deal with relatively thick targets like the human head or trunk. Thus, the fidelity of proton computed tomography (pCT) simulations as a tool for proton therapy planning depends in general case on the accuracy of results obtained for the proton interaction with thick absorbers. As we previously showed it, the GEANT4 simulations of proton energy spectra after thick absorbers do not agree well with existing experimental data. Moreover, the spectra simulated for the Bethe-Bloch domain showed an unexpected sensitivity to the choice of low-energy electromagnetic models during the code execution. These observations were done with the GEANT4 version 8.2 during our previous simulations for pCT. As the most probable reasons for these effects is some specific feature in the code, or some specific implicit parameters in the GEANT4 manual, we continued our study with versions 9.2 and 9.4 of the code. This work describes in more details the simulations of the 25 MeV protons passing through 6mm polyethylene absorber. The simulations were done by modifying only the geometry in the Hadrontherapy Example, and for all available choices of the Electromagnetic Physics Models. The results were compared with our previous simulation, with theoretical predictions and with experimental data. Some variations in comparison with our previous results were obtained. The simulations were performed considering further applications for pCT development. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-01-01 2022-04-28T19:11:05Z 2022-04-28T19:11:05Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/conferenceObject |
format |
conferenceObject |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Proceedings of Science, v. 142. 1824-8039 http://hdl.handle.net/11449/221163 2-s2.0-85053308431 |
identifier_str_mv |
Proceedings of Science, v. 142. 1824-8039 2-s2.0-85053308431 |
url |
http://hdl.handle.net/11449/221163 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Proceedings of Science |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
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1808129134261436416 |