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pubmed-article:16060318pubmed:dateCreated2005-8-2lld:pubmed
pubmed-article:16060318pubmed:abstractTextOutput factors at the surface for treatment cones and lead cut-outs have been measured for a Pantak Therapax SXT 150 superficial therapy unit with x-ray beam qualities from 1 to 13 mm A1 HVL. A variety of phantom materials and two ionisation chambers were tested for their suitability in output factor and percentage depth dose measurement. Solid water proved a useful water-equivalent phantom material with discrepancies between measurements in water and solid water less than 2.3% for percentage depth dose and less than 0.6% for output factors. Larger measurement discrepancies were found for Plastic Water and Perspex. A PTW Markus chamber was found to compare well with a NE 2532/3 low energy chamber in percentage depth dose measurement, but discrepancies arose between the chambers in output factor measurements, up to 5% for small field sizes. Measurements indicated that the Markus chamber had an energy dependent response in the kilovoltage range, which could account for the discrepancy in output factor measurement.lld:pubmed
pubmed-article:16060318pubmed:languageenglld:pubmed
pubmed-article:16060318pubmed:journalhttp://linkedlifedata.com/r...lld:pubmed
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pubmed-article:16060318pubmed:statusMEDLINElld:pubmed
pubmed-article:16060318pubmed:monthJunlld:pubmed
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pubmed-article:16060318pubmed:authorpubmed-author:GibbsAAlld:pubmed
pubmed-article:16060318pubmed:authorpubmed-author:HealyB JBJlld:pubmed
pubmed-article:16060318pubmed:authorpubmed-author:NitschkeK NKNlld:pubmed
pubmed-article:16060318pubmed:authorpubmed-author:MurryR LRLlld:pubmed
pubmed-article:16060318pubmed:authorpubmed-author:PrunsterJ EJElld:pubmed
pubmed-article:16060318pubmed:issnTypePrintlld:pubmed
pubmed-article:16060318pubmed:volume28lld:pubmed
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pubmed-article:16060318pubmed:pagination115-21lld:pubmed
pubmed-article:16060318pubmed:dateRevised2007-11-15lld:pubmed
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pubmed-article:16060318pubmed:year2005lld:pubmed
pubmed-article:16060318pubmed:articleTitleOutput factor measurements for a kilovoltage X-ray therapy unit.lld:pubmed
pubmed-article:16060318pubmed:affiliationSouthern Zone Radiation Oncology Service--Mater Centre, Princess Alexandra Hospital, Brisbane, Australia. brendan_j_healy@health.qld.gov.aulld:pubmed
pubmed-article:16060318pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:16060318pubmed:publicationTypeComparative Studylld:pubmed
pubmed-article:16060318pubmed:publicationTypeEvaluation Studieslld:pubmed
pubmed-article:16060318pubmed:publicationTypeValidation Studieslld:pubmed