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dc.contributor.authorMesbahi, A
dc.contributor.authorNaseri, A
dc.date.accessioned2018-08-26T08:58:05Z
dc.date.available2018-08-26T08:58:05Z
dc.date.issued2008
dc.identifier.urihttp://dspace.tbzmed.ac.ir:8080/xmlui/handle/123456789/54651
dc.description.abstractBackground: The air kerma rate of brachytherapy sources should be determined accurately by the manufacturer and medical physicists before clinical use. Aim: In the current study the air kerma rate of three new 60Co high dose rate (HDR) brachytherapy sources was obtained by in-air measurements and a Farmer type ionization chamber. Materials/methods: Three 60Co sources of a brachytherapy afterloading unit, GZP6, were calibrated in free air using a Farmer type chamber which was calibrated in terms of air kerma in an external teletherapy 60Co beam. Several correction factors including scatter correction and non-uniformity correction factors were derived and used for in-air calibrations. Results: The measured air kerma rates for all sources were in good agreement (less than 2.5%) with manufacturer-provided data, and the reliability of the air kerma rates of sources was validated for clinical application. Conclusion: In-air calibration of 60Co HDR sources can be performed using a Farmer type ionization chamber with acceptable accuracy. However, accurate distance measurement and reproducible measurement setup are required.
dc.language.isoEnglish
dc.relation.ispartofReports of Practical Oncology and Radiotherapy
dc.subjectcobalt 60
dc.subjectaccuracy
dc.subjectarticle
dc.subjectbrachytherapy
dc.subjectcalibration
dc.subjectcobalt teletherapy
dc.subjectdosimetry
dc.subjectionization chamber
dc.subjectmathematical analysis
dc.subjectmathematical computing
dc.subjectradiation attenuation
dc.subjectradiation beam
dc.subjectradiation dose distribution
dc.subjectradiation scattering
dc.subjectreliability
dc.subjectreproducibility
dc.titleIn-air calibration of new high dose rate 60Co brachytherapy sources: Results of measurements on a GZP6 brachytherapy afterloading unit
dc.typeArticle
dc.citation.volume13
dc.citation.issue2
dc.citation.spage69
dc.citation.epage73
dc.citation.indexScopus
dc.identifier.DOIhttps://doi.org/10.1016/S1507-1367(10)60084-3


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