{"id":{"repo_id":"carleton","oai_identifier":"oai:carleton.scholaris.ca:20.500.14718/38377"},"canonical_url":"https://search.dev.ndltd.org/etd/carleton/oai:carleton.scholaris.ca:20.500.14718/38377","repository":{"repo_id":"carleton","name":"Carleton University","base_url":"https://carleton.scholaris.ca/server/oai/request"},"display":{"title":"An Absorbed Dose to Water Primary Standard for Ir-192 Brachytherapy","abstract":"The goal of this work was to develop an absorbed dose to water primary standard for Ir-192 brachytherapy by using a Fricke dosimeter. The radiation chemical yield (G-value) of the Ferric ions in the Fricke solution was measured at Co-60 and 250 kVp X-ray, yielding 1.610 ± 0.010 μmol J-1 and 1.602 ± 0.009 μmol J-1 respectively. A log-linear interpolation was conducted based on the two standard beam values to realize the radiation chemical yield at Ir-192 energy of 1.605 ± 0.005 μmol J-1. A PMMA holder was developed for irradiations using an Ir-192 brachytherapy source and a final uncertainty on the dose to water at the reference position of 0.7 % was achieved, in agreement with NRC air-kerma based standards at the 2σ level.","abstract_html":"The goal of this work was to develop an absorbed dose to water primary standard for Ir-192 brachytherapy by using a Fricke dosimeter. The radiation chemical yield (G-value) of the Ferric ions in the Fricke solution was measured at Co-60 and 250 kVp X-ray, yielding 1.610 ± 0.010 μmol J-1 and 1.602 ± 0.009 μmol J-1 respectively. A log-linear interpolation was conducted based on the two standard beam values to realize the radiation chemical yield at Ir-192 energy of 1.605 ± 0.005 μmol J-1. A PMMA holder was developed for irradiations using an Ir-192 brachytherapy source and a final uncertainty on the dose to water at the reference position of 0.7 % was achieved, in agreement with NRC air-kerma based standards at the 2σ level.","abstract_has_math":false,"creators":["El Gamal, Islam Mohamed Medhat"],"institution":"Carleton University","degree_name":"Master of Science (M.Sc.)","degree_level":"Master's","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2013,"date_issued":"2013","date_published":"2013","updated_at":"2026-07-24T01:34:24Z","subjects":[],"languages":["en"],"rights":["Copyright © 2013 the author(s). Theses may be used for non-commercial research, educational, or related academic purposes only. Such uses include personal study, research, scholarship, and teaching. Theses may only be shared by linking to Carleton University Institutional Repository and no part may be used without proper attribution to the author. 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A log-linear interpolation was conducted based on the two standard beam values to realize the radiation chemical yield at Ir-192 energy of 1.605 ± 0.005 μmol J-1. A PMMA holder was developed for irradiations using an Ir-192 brachytherapy source and a final uncertainty on the dose to water at the reference position of 0.7 % was achieved, in agreement with NRC air-kerma based standards at the 2σ level."]},{"key":"dc:title","label":"Title","values":["An Absorbed Dose to Water Primary Standard for Ir-192 Brachytherapy"]}]}],"canonical_facts":{"dc:creator":["El Gamal, Islam Mohamed Medhat"],"dc:date.accessioned":["2025-04-08T19:22:23Z"],"dc:date.available":["2025-04-08T19:22:23Z"],"dc:date.issued":["2013"],"dc:description.abstract":["The goal of this work was to develop an absorbed dose to water primary standard for Ir-192 brachytherapy by using a Fricke dosimeter. The radiation chemical yield (G-value) of the Ferric ions in the Fricke solution was measured at Co-60 and 250 kVp X-ray, yielding 1.610 ± 0.010 μmol J-1 and 1.602 ± 0.009 μmol J-1 respectively. A log-linear interpolation was conducted based on the two standard beam values to realize the radiation chemical yield at Ir-192 energy of 1.605 ± 0.005 μmol J-1. A PMMA holder was developed for irradiations using an Ir-192 brachytherapy source and a final uncertainty on the dose to water at the reference position of 0.7 % was achieved, in agreement with NRC air-kerma based standards at the 2σ level."],"dc:identifier.doi":["10.22215/etd/2013-09962"],"dc:identifier.uri":["https://hdl.handle.net/20.500.14718/38377"],"dc:language.iso":["en"],"dc:publisher":["Carleton University"],"dc:rights":["Copyright © 2013 the author(s). Theses may be used for non-commercial research, educational, or related academic purposes only. Such uses include personal study, research, scholarship, and teaching. 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