Benchmark measurements and simulations of dose perturbations due to metallic spheres in proton beams

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dc.citation.firstpage37en_US
dc.citation.journalTitleRadiation Measurementsen_US
dc.citation.lastpage44en_US
dc.citation.volumeNumber58en_US
dc.contributor.authorNewhauser, Wayne D.en_US
dc.contributor.authorRechner, Lauraen_US
dc.contributor.authorMirkovic, Draganen_US
dc.contributor.authorYepes, Pabloen_US
dc.contributor.authorKoch, Nicholas C.en_US
dc.contributor.authorTitt, Uween_US
dc.contributor.authorFontenot, Jonas D.en_US
dc.contributor.authorZhang, Ruien_US
dc.date.accessioned2015-03-16T16:56:10Zen_US
dc.date.available2015-03-16T16:56:10Zen_US
dc.date.issued2013en_US
dc.description.abstractMonte Carlo simulations are increasingly used for dose calculations in proton therapy due to its inherent accuracy. However, dosimetric deviations have been found using Monte Carlo code when high density materials are present in the proton beamline. The purpose of this work was to quantify the magnitude of dose perturbation caused by metal objects. We did this by comparing measurements and Monte Carlo predictions of dose perturbations caused by the presence of small metal spheres in several clinical proton therapy beams as functions of proton beam range and drift space. Monte Carlo codes MCNPX, GEANT4 and Fast Dose Calculator (FDC) were used. Generally good agreement was found between measurements and Monte Carlo predictions, with the average difference within 5% and maximum difference within 17%. The modification of multiple Coulomb scattering model in MCNPX code yielded improvement in accuracy and provided the best overall agreement with measurements. Our results confirmed that Monte Carlo codes are well suited for predicting multiple Coulomb scattering in proton therapy beams when short drift spaces are involved.en_US
dc.identifier.citationNewhauser, Wayne D., Rechner, Laura, Mirkovic, Dragan, et al.. "Benchmark measurements and simulations of dose perturbations due to metallic spheres in proton beams." <i>Radiation Measurements,</i> 58, (2013) Elsevier: 37-44. http://dx.doi.org/10.1016/j.radmeas.2013.08.001.en_US
dc.identifier.doihttp://dx.doi.org/10.1016/j.radmeas.2013.08.001en_US
dc.identifier.urihttps://hdl.handle.net/1911/79355en_US
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.rightsThis is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by Elsevier.en_US
dc.subject.keywordproton beamen_US
dc.subject.keywordmultiple Coulomb scatteringen_US
dc.subject.keyworddose perturbationen_US
dc.subject.keywordMonte Carlo simulationen_US
dc.titleBenchmark measurements and simulations of dose perturbations due to metallic spheres in proton beamsen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpost-printen_US
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