Reduced calibration curve for proton computed tomography
Autor(a) principal: | |
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Data de Publicação: | 2010 |
Outros Autores: | , , , , , , , , |
Tipo de documento: | Artigo de conferência |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1063/1.3447997 http://hdl.handle.net/11449/71834 |
Resumo: | The pCT deals with relatively thick targets like the human head or trunk. Thus, the fidelity of pCT as a tool for proton therapy planning depends on the accuracy of physical formulas used for proton interaction with thick absorbers. Although the actual overall accuracy of the proton stopping power in the Bethe-Bloch domain is about 1%, the analytical calculations and the Monte Carlo simulations with codes like TRIM/SRIM, MCNPX and GEANT4 do not agreed with each other. A tentative to validate the codes against experimental data for thick absorbers bring some difficulties: only a few data is available and the existing data sets have been acquired at different initial proton energies, and for different absorber materials. In this work we compare the results of our Monte Carlo simulations with existing experimental data in terms of reduced calibration curve, i.e. the range - energy dependence normalized on the range scale by the full projected CSDA range for given initial proton energy in a given material, taken from the NIST PSTAR database, and on the final proton energy scale - by the given initial energy of protons. This approach is almost energy and material independent. The results of our analysis are important for pCT development because the contradictions observed at arbitrary low initial proton energies could be easily scaled now to typical pCT energies. © 2010 American Institute of Physics. |
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Repositório Institucional da UNESP |
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Reduced calibration curve for proton computed tomographyCalibration curveEnergy measurementMonte Carlo methodsProton beamsThe pCT deals with relatively thick targets like the human head or trunk. Thus, the fidelity of pCT as a tool for proton therapy planning depends on the accuracy of physical formulas used for proton interaction with thick absorbers. Although the actual overall accuracy of the proton stopping power in the Bethe-Bloch domain is about 1%, the analytical calculations and the Monte Carlo simulations with codes like TRIM/SRIM, MCNPX and GEANT4 do not agreed with each other. A tentative to validate the codes against experimental data for thick absorbers bring some difficulties: only a few data is available and the existing data sets have been acquired at different initial proton energies, and for different absorber materials. In this work we compare the results of our Monte Carlo simulations with existing experimental data in terms of reduced calibration curve, i.e. the range - energy dependence normalized on the range scale by the full projected CSDA range for given initial proton energy in a given material, taken from the NIST PSTAR database, and on the final proton energy scale - by the given initial energy of protons. This approach is almost energy and material independent. The results of our analysis are important for pCT development because the contradictions observed at arbitrary low initial proton energies could be easily scaled now to typical pCT energies. © 2010 American Institute of Physics.Instituto Politécnico UERJ, Rua Alberto Rangel s/n, 28630-050, Nova Friburgo - RJUniversidade Tecnológica Federal Do Paraná-UTFPR, Av. Sete de Setembro 3166, 80230-901, Curitiba - PRCentro de Aplicaciones Tecnologicas Y Desarrollo Nuclear - CEADEN, Calle 30 #502 e/5ta y 7ma Avenida, Playa, Ciudad HabanaInstituto de Biociências UNESP, Distrito de Rubião Jr. s/n, 18618-000, Botucatu - SPLaboratório de Instrumentação Nuclear COPPE/UFRJ, Av. Horácio Macedo 2030, 21941-914, Rio de Janeiro - RJInstituto de Biociências UNESP, Distrito de Rubião Jr. s/n, 18618-000, Botucatu - SPUniversidade do Estado do Rio de Janeiro (UERJ)Universidade Tecnológica Federal Do Paraná-UTFPRCentro de Aplicaciones Tecnologicas Y Desarrollo Nuclear - CEADENUniversidade Estadual Paulista (Unesp)Universidade Federal do Rio de Janeiro (UFRJ)Yevseyeva, OlgaDe Assis, JoaquimEvseev, IvanSchelin, HugoPaschuk, SergeiMilhoretto, EdneySetti, JoãoDíaz, KatherinHormaza, Joel [UNESP]Lopes, Ricardo2014-05-27T11:24:46Z2014-05-27T11:24:46Z2010-08-26info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject104-109application/pdfhttp://dx.doi.org/10.1063/1.3447997AIP Conference Proceedings, v. 1245, p. 104-109.0094-243X1551-7616http://hdl.handle.net/11449/7183410.1063/1.34479972-s2.0-779558074292-s2.0-77955807429.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengAIP Conference Proceedingsinfo:eu-repo/semantics/openAccess2023-10-23T06:07:17Zoai:repositorio.unesp.br:11449/71834Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-10-23T06:07:17Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Reduced calibration curve for proton computed tomography |
title |
Reduced calibration curve for proton computed tomography |
spellingShingle |
Reduced calibration curve for proton computed tomography Yevseyeva, Olga Calibration curve Energy measurement Monte Carlo methods Proton beams |
title_short |
Reduced calibration curve for proton computed tomography |
title_full |
Reduced calibration curve for proton computed tomography |
title_fullStr |
Reduced calibration curve for proton computed tomography |
title_full_unstemmed |
Reduced calibration curve for proton computed tomography |
title_sort |
Reduced calibration curve for proton computed tomography |
author |
Yevseyeva, Olga |
author_facet |
Yevseyeva, Olga De Assis, Joaquim Evseev, Ivan Schelin, Hugo Paschuk, Sergei Milhoretto, Edney Setti, João Díaz, Katherin Hormaza, Joel [UNESP] Lopes, Ricardo |
author_role |
author |
author2 |
De Assis, Joaquim Evseev, Ivan Schelin, Hugo Paschuk, Sergei Milhoretto, Edney Setti, João Díaz, Katherin Hormaza, Joel [UNESP] Lopes, Ricardo |
author2_role |
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-UTFPR Centro de Aplicaciones Tecnologicas Y Desarrollo Nuclear - CEADEN Universidade Estadual Paulista (Unesp) Universidade Federal do Rio de Janeiro (UFRJ) |
dc.contributor.author.fl_str_mv |
Yevseyeva, Olga De Assis, Joaquim Evseev, Ivan Schelin, Hugo Paschuk, Sergei Milhoretto, Edney Setti, João Díaz, Katherin Hormaza, Joel [UNESP] Lopes, Ricardo |
dc.subject.por.fl_str_mv |
Calibration curve Energy measurement Monte Carlo methods Proton beams |
topic |
Calibration curve Energy measurement Monte Carlo methods Proton beams |
description |
The pCT deals with relatively thick targets like the human head or trunk. Thus, the fidelity of pCT as a tool for proton therapy planning depends on the accuracy of physical formulas used for proton interaction with thick absorbers. Although the actual overall accuracy of the proton stopping power in the Bethe-Bloch domain is about 1%, the analytical calculations and the Monte Carlo simulations with codes like TRIM/SRIM, MCNPX and GEANT4 do not agreed with each other. A tentative to validate the codes against experimental data for thick absorbers bring some difficulties: only a few data is available and the existing data sets have been acquired at different initial proton energies, and for different absorber materials. In this work we compare the results of our Monte Carlo simulations with existing experimental data in terms of reduced calibration curve, i.e. the range - energy dependence normalized on the range scale by the full projected CSDA range for given initial proton energy in a given material, taken from the NIST PSTAR database, and on the final proton energy scale - by the given initial energy of protons. This approach is almost energy and material independent. The results of our analysis are important for pCT development because the contradictions observed at arbitrary low initial proton energies could be easily scaled now to typical pCT energies. © 2010 American Institute of Physics. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010-08-26 2014-05-27T11:24:46Z 2014-05-27T11:24:46Z |
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 |
http://dx.doi.org/10.1063/1.3447997 AIP Conference Proceedings, v. 1245, p. 104-109. 0094-243X 1551-7616 http://hdl.handle.net/11449/71834 10.1063/1.3447997 2-s2.0-77955807429 2-s2.0-77955807429.pdf |
url |
http://dx.doi.org/10.1063/1.3447997 http://hdl.handle.net/11449/71834 |
identifier_str_mv |
AIP Conference Proceedings, v. 1245, p. 104-109. 0094-243X 1551-7616 10.1063/1.3447997 2-s2.0-77955807429 2-s2.0-77955807429.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
AIP Conference Proceedings |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
104-109 application/pdf |
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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1797789484234833920 |