Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/13105
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dc.contributor.authorGorjiara, Tinaen
dc.contributor.authorHill, Robinen
dc.contributor.authorKuncic, Zdenkaen
dc.contributor.authorBosi, Stephen Giuseppeen
dc.contributor.authorDavies, Justin Bryanen
dc.contributor.authorBaldock, Cliveen
dc.date.accessioned2013-07-24T14:05:00Z-
dc.date.issued2011-
dc.identifier.citationPhysics in Medicine and Biology, 56(15), p. 4685-4699en
dc.identifier.issn1361-6560en
dc.identifier.issn0031-9155en
dc.identifier.urihttps://hdl.handle.net/1959.11/13105-
dc.description.abstractThe genipin radiochromic gel offers enormous potential as a three-dimensional dosimeter in advanced radiotherapy techniques. We have used several methods (including Monte Carlo simulation), to investigate the water equivalency of genipin gel by characterizing its radiological properties, including mass and electron densities, photon interaction cross sections, mass energy absorption coefficient, effective atomic number, collisional, radiative and total mass stopping powers and electron mass scattering power. Depth doses were also calculated for clinical kilovoltage and megavoltage x-ray beams as well as megavoltage electron beams. The mass density, electron density and effective atomic number of genipin were found to differ from water by less than 2%. For energies below 150 keV, photoelectric absorption cross sections are more than 3% higher than water due to the strong dependence on atomic number. Compton scattering and pair production interaction cross sections for genipin gel differ from water by less than 1%. The mass energy absorption coefficient is approximately 3%higher than water for energies<60 keV due to the dominance of photoelectric absorption in this energy range. The electron mass stopping power and mass scattering power differ from water by approximately 0.3%. X-ray depth dose curves for genipin gel agree to within 1% with those for water. Our results demonstrate that genipin gel can be considered water equivalent for kilovoltage and megavoltage x-ray beam dosimetry. For megavoltage electron beam dosimetry, however, our results suggest that a correction factor may be needed to convert measured dose in genipin gel to that of water, since differences in some radiological properties of up to 3% compared to water are observed. Our results indicate that genipin gel exhibits greater water equivalency than polymer gels and PRESAGE formulations.en
dc.languageenen
dc.publisherInstitute of Physics Publishing Ltden
dc.relation.ispartofPhysics in Medicine and Biologyen
dc.titleRadiological characterization and water equivalency of genipin gel for x-ray and electron beam dosimetryen
dc.typeJournal Articleen
dc.identifier.doi10.1088/0031-9155/56/15/004en
dc.subject.keywordsMedical Physicsen
dc.subject.keywordsAtomic, Molecular, Nuclear, Particle and Plasma Physicsen
local.contributor.firstnameTinaen
local.contributor.firstnameRobinen
local.contributor.firstnameZdenkaen
local.contributor.firstnameStephen Giuseppeen
local.contributor.firstnameJustin Bryanen
local.contributor.firstnameCliveen
local.subject.for2008029903 Medical Physicsen
local.subject.for2008020299 Atomic, Molecular, Nuclear, Particle and Plasma Physics not elsewhere classifieden
local.subject.seo2008929999 Health not elsewhere classifieden
local.profile.schoolSchool of Science and Technologyen
local.profile.emailtina@physics.usyd.edu.auen
local.profile.emailz.kuncic@physics.usyd.edu.auen
local.profile.emailsbosi@une.edu.auen
local.profile.emailjbd@ansto.gov.auen
local.profile.emailclive.baldock@mq.edu.auen
local.output.categoryC1en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordune-20130206-000225en
local.publisher.placeUnited Kingdomen
local.format.startpage4685en
local.format.endpage4699en
local.identifier.scopusid79961089189en
local.peerreviewedYesen
local.identifier.volume56en
local.identifier.issue15en
local.contributor.lastnameGorjiaraen
local.contributor.lastnameHillen
local.contributor.lastnameKuncicen
local.contributor.lastnameBosien
local.contributor.lastnameDaviesen
local.contributor.lastnameBaldocken
dc.identifier.staffune-id:sbosien
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.identifier.unepublicationidune:13316en
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
local.title.maintitleRadiological characterization and water equivalency of genipin gel for x-ray and electron beam dosimetryen
local.output.categorydescriptionC1 Refereed Article in a Scholarly Journalen
local.search.authorGorjiara, Tinaen
local.search.authorHill, Robinen
local.search.authorKuncic, Zdenkaen
local.search.authorBosi, Stephen Giuseppeen
local.search.authorDavies, Justin Bryanen
local.search.authorBaldock, Cliveen
local.uneassociationUnknownen
local.year.published2011en
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