dc.contributor.author | Mesbahi, A | |
dc.contributor.author | Naseri, A | |
dc.date.accessioned | 2018-08-26T08:58:05Z | |
dc.date.available | 2018-08-26T08:58:05Z | |
dc.date.issued | 2008 | |
dc.identifier.uri | http://dspace.tbzmed.ac.ir:8080/xmlui/handle/123456789/54651 | |
dc.description.abstract | Background: 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.iso | English | |
dc.relation.ispartof | Reports of Practical Oncology and Radiotherapy | |
dc.subject | cobalt 60 | |
dc.subject | accuracy | |
dc.subject | article | |
dc.subject | brachytherapy | |
dc.subject | calibration | |
dc.subject | cobalt teletherapy | |
dc.subject | dosimetry | |
dc.subject | ionization chamber | |
dc.subject | mathematical analysis | |
dc.subject | mathematical computing | |
dc.subject | radiation attenuation | |
dc.subject | radiation beam | |
dc.subject | radiation dose distribution | |
dc.subject | radiation scattering | |
dc.subject | reliability | |
dc.subject | reproducibility | |
dc.title | In-air calibration of new high dose rate 60Co brachytherapy sources: Results of measurements on a GZP6 brachytherapy afterloading unit | |
dc.type | Article | |
dc.citation.volume | 13 | |
dc.citation.issue | 2 | |
dc.citation.spage | 69 | |
dc.citation.epage | 73 | |
dc.citation.index | Scopus | |
dc.identifier.DOI | https://doi.org/10.1016/S1507-1367(10)60084-3 | |