Monte Carlo simulation of the Varian TrueBeam flattened-filtered beams using a surrogate geometry in PRIMO

Background. Monte Carlo simulation of radiation transport for medical linear accelerators (linacs) requires accurate knowledge of the geometrical description of the linac head. Since the geometry of Varian TrueBeam machines has not been disclosed, the manufacturer distributes phase-space files of th...

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Autores: Rodríguez Olmos, Miguel David, Sempau Roma, Josep|||0000-0002-2754-7685, Brualla, Lorenzo
Tipo de recurso: artículo
Fecha de publicación:2024
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/401792
Acceso en línea:https://hdl.handle.net/2117/401792
https://dx.doi.org/10.1186/s13014-024-02405-w
Access Level:acceso abierto
Palabra clave:Monte Carlo method
Radiotherapy
Monte Carlo
Phase space
PRIMO
Linear accelerator
Montecarlo, Mètode de
Radioteràpia
Àrees temàtiques de la UPC::Enginyeria biomèdica::Electrònica biomèdica::Radioteràpia
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spelling Monte Carlo simulation of the Varian TrueBeam flattened-filtered beams using a surrogate geometry in PRIMORodríguez Olmos, Miguel DavidSempau Roma, Josep|||0000-0002-2754-7685Brualla, LorenzoMonte Carlo methodRadiotherapyMonte CarloPhase spacePRIMOLinear acceleratorMontecarlo, Mètode deRadioteràpiaÀrees temàtiques de la UPC::Enginyeria biomèdica::Electrònica biomèdica::RadioteràpiaBackground. Monte Carlo simulation of radiation transport for medical linear accelerators (linacs) requires accurate knowledge of the geometrical description of the linac head. Since the geometry of Varian TrueBeam machines has not been disclosed, the manufacturer distributes phase-space files of the linac patient-independent part to allow researchers to compute absorbed dose distributions using the Monte Carlo method. This approach limits the possibility of achieving an arbitrarily small statistical uncertainty. This work investigates the use of the geometry of the Varian Clinac 2100, which is included in the Monte Carlo system PRIMO, as a surrogate. Methods. Energy, radial and angular distributions extracted from the TrueBeam phase space files published by the manufacturer and from phase spaces tallied with PRIMO for the Clinac 2100 were compared for the 6, 8, 10 and 15 MV flattened-filtered beams. Dose distributions in water computed for the two sets of PSFs were compared with the Varian Representative Beam Data (RBD) for square fields with sides ranging from 3 to 30 cm. Output factors were calculated for square fields with sides ranging from 2 to 40 cm. Results. Excellent agreement with the RBD was obtained for the simulations that employed the phase spaces distributed by Varian as well as for those that used the surrogate geometry, reaching in both cases Gamma ( , 2 mm) pass rates larger than , except for the 15 MV surrogate. This result supports previous investigations that suggest a change in the material composition of the TrueBeam 15 MV flattening filter. In order to get the said agreement, PRIMO simulations were run using enlarged transport parameters to compensate the discrepancies between the actual and surrogate geometries. Conclusions. This work sustains the claim that the simulation of the 6, 8 and 10 MV flattening-filtered beams of the TrueBeam linac can be performed using the Clinac 2100 model of PRIMO without significant loss of accuracy.Open Access funding enabled and organized by Projekt DEAL. The authors acknowledge support by the Open Access Publication Fund of the University of Duisburg-Essen. MR acknowledges funding by the Sistema Nacional de Investigación de Panamá (SNI). JS thanks the Spanish Ministerio de Ciencia e Innovación, project PID2019-104714GB-C22. LB acknowledges funding by the HARMONIC project. The HARMONIC project (Health effects of cArdiac fluoRoscopy and MOderN radIotherapy in paediatriCs) has received funding from the Euratom research and training programme 2014-2018 under grant agreement number 847707.Springer20242024-01-2520242024-02-13journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/401792https://dx.doi.org/10.1186/s13014-024-02405-wreponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)InglésengAgencia Estatal de Investigación http://doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020 PID2019-104714GB-C22 NUCLEAR STRUCTURE, ASTROPHYSICS AND APPLICATIONS AT UPCEuropean Commission http://doi.org/10.13039/100010661 Horizon 2020 Framework Programme 847707 Health effects of cArdiac fluoRoscopy and MOderN radIotherapy in paediatriCsopen accesshttp://purl.org/coar/access_right/c_abf2Attribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/4017922026-05-27T15:37:01Z
dc.title.none.fl_str_mv Monte Carlo simulation of the Varian TrueBeam flattened-filtered beams using a surrogate geometry in PRIMO
title Monte Carlo simulation of the Varian TrueBeam flattened-filtered beams using a surrogate geometry in PRIMO
spellingShingle Monte Carlo simulation of the Varian TrueBeam flattened-filtered beams using a surrogate geometry in PRIMO
Rodríguez Olmos, Miguel David
Monte Carlo method
Radiotherapy
Monte Carlo
Phase space
PRIMO
Linear accelerator
Montecarlo, Mètode de
Radioteràpia
Àrees temàtiques de la UPC::Enginyeria biomèdica::Electrònica biomèdica::Radioteràpia
title_short Monte Carlo simulation of the Varian TrueBeam flattened-filtered beams using a surrogate geometry in PRIMO
title_full Monte Carlo simulation of the Varian TrueBeam flattened-filtered beams using a surrogate geometry in PRIMO
title_fullStr Monte Carlo simulation of the Varian TrueBeam flattened-filtered beams using a surrogate geometry in PRIMO
title_full_unstemmed Monte Carlo simulation of the Varian TrueBeam flattened-filtered beams using a surrogate geometry in PRIMO
title_sort Monte Carlo simulation of the Varian TrueBeam flattened-filtered beams using a surrogate geometry in PRIMO
dc.creator.none.fl_str_mv Rodríguez Olmos, Miguel David
Sempau Roma, Josep|||0000-0002-2754-7685
Brualla, Lorenzo
author Rodríguez Olmos, Miguel David
author_facet Rodríguez Olmos, Miguel David
Sempau Roma, Josep|||0000-0002-2754-7685
Brualla, Lorenzo
author_role author
author2 Sempau Roma, Josep|||0000-0002-2754-7685
Brualla, Lorenzo
author2_role author
author
dc.subject.none.fl_str_mv Monte Carlo method
Radiotherapy
Monte Carlo
Phase space
PRIMO
Linear accelerator
Montecarlo, Mètode de
Radioteràpia
Àrees temàtiques de la UPC::Enginyeria biomèdica::Electrònica biomèdica::Radioteràpia
topic Monte Carlo method
Radiotherapy
Monte Carlo
Phase space
PRIMO
Linear accelerator
Montecarlo, Mètode de
Radioteràpia
Àrees temàtiques de la UPC::Enginyeria biomèdica::Electrònica biomèdica::Radioteràpia
description Background. Monte Carlo simulation of radiation transport for medical linear accelerators (linacs) requires accurate knowledge of the geometrical description of the linac head. Since the geometry of Varian TrueBeam machines has not been disclosed, the manufacturer distributes phase-space files of the linac patient-independent part to allow researchers to compute absorbed dose distributions using the Monte Carlo method. This approach limits the possibility of achieving an arbitrarily small statistical uncertainty. This work investigates the use of the geometry of the Varian Clinac 2100, which is included in the Monte Carlo system PRIMO, as a surrogate. Methods. Energy, radial and angular distributions extracted from the TrueBeam phase space files published by the manufacturer and from phase spaces tallied with PRIMO for the Clinac 2100 were compared for the 6, 8, 10 and 15 MV flattened-filtered beams. Dose distributions in water computed for the two sets of PSFs were compared with the Varian Representative Beam Data (RBD) for square fields with sides ranging from 3 to 30 cm. Output factors were calculated for square fields with sides ranging from 2 to 40 cm. Results. Excellent agreement with the RBD was obtained for the simulations that employed the phase spaces distributed by Varian as well as for those that used the surrogate geometry, reaching in both cases Gamma ( , 2 mm) pass rates larger than , except for the 15 MV surrogate. This result supports previous investigations that suggest a change in the material composition of the TrueBeam 15 MV flattening filter. In order to get the said agreement, PRIMO simulations were run using enlarged transport parameters to compensate the discrepancies between the actual and surrogate geometries. Conclusions. This work sustains the claim that the simulation of the 6, 8 and 10 MV flattening-filtered beams of the TrueBeam linac can be performed using the Clinac 2100 model of PRIMO without significant loss of accuracy.
publishDate 2024
dc.date.none.fl_str_mv 2024
2024-01-25
2024
2024-02-13
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/401792
https://dx.doi.org/10.1186/s13014-024-02405-w
url https://hdl.handle.net/2117/401792
https://dx.doi.org/10.1186/s13014-024-02405-w
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Agencia Estatal de Investigación http://doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020 PID2019-104714GB-C22 NUCLEAR STRUCTURE, ASTROPHYSICS AND APPLICATIONS AT UPC
European Commission http://doi.org/10.13039/100010661 Horizon 2020 Framework Programme 847707 Health effects of cArdiac fluoRoscopy and MOderN radIotherapy in paediatriCs
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300719

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