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Radiotherapy dosimetry based on perflourinated polymer opitcal fibres

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Show simple item record Olusoji, Olugbenga J. Kam, Wern O'Keeffe, Sinéad 2020-04-08T11:14:32Z 2020-04-08T11:14:32Z 2020
dc.description peer-reviewed en_US
dc.description.abstract The complexity of treating cancerous cells in patients using radiotherapy, requires precision in terms of the total dose received by the patient. The use of scintillating materials at the tip of the fibre for real time dosimetry dominate the current development of optical fibre dosimeters, however, they are limited to single point sensing. The changes in the structural and chemical properties in optical fibres on exposure to radiation gives rise to attenuation of the optical signal i.e. Radiation Induced Attenuation (RIA). This has proven to be a useful feature in monitoring radiation from gamma sources (Cobalt60 sources) using PMMA (polymethyl methacrylate) fibres and perfluorinated graded-index polymer optical fibre (Cytop). The aim of this study is to investigate the performance of Cytop fibre in monitoring low doses of X-ray radiation (up to 10 Gy), produced by clinical linear accelerators (linac) for real time monitoring. The radiation induced attenuation (RIA) were measured across a 1 m length of Cytop fibre when the fibre was exposed to different radiation energy (6 MV, 10 MV) from the linac. The result of this study shows that the sensor has a good sensitivity of 0.0693 ± 0.004 dB/m/Gy and 0.0711 ± 0.004 dB/m/Gy at the wavelength of 695 nm and 817 nm respectively, for a radiation energy of 6 MV. Preliminary results demonstrate the potential of the Cytop fibre as a dosimeter for radiation treatment. The Cytop fibre sensor also exhibits a higher sensitivity, in the order of 3, when compared to PMMA optical fibres. en_US
dc.language.iso eng en_US
dc.publisher SPIE: The International Society for Optics and Phontonics en_US
dc.relation.ispartofseries Proc. SPIE 11354, Optical Sensing and Detection VI;113541W
dc.rights Copyright 2020 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited en_US
dc.subject optical fibre en_US
dc.subject cytop en_US
dc.subject dosimetry en_US
dc.subject radiation induced attenuation en_US
dc.subject optical sensor en_US
dc.subject radiotherapy en_US
dc.title Radiotherapy dosimetry based on perflourinated polymer opitcal fibres en_US
dc.type info:eu-repo/semantics/conferenceObject en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.identifier.doi 10.1117/12.2551148
dc.contributor.sponsor SFI en_US
dc.relation.projectid UF150618 en_US
dc.relation.projectid RGF\EA\180166 en_US
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US

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