Terbium-doped gadolinium oxysulfide (Gd2O2S:Tb) scintillation-based polymer optical fibre sensor for real time monitoring of radiation dose in oncology

E. Lewis; S. O'Keeffe; M. Grattan; A. Hounsell; D. McCarthy; P. Woulfe; J. Cronin; L. Mihai; D. Sporea; A. Santhanam; N. Agazaryan

doi:10.1117/12.2058572

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15 May 2014 Terbium-doped gadolinium oxysulfide (Gd2O2S:Tb) scintillation-based polymer optical fibre sensor for real time monitoring of radiation dose in oncology

E. Lewis, S. O'Keeffe, M. Grattan, A. Hounsell, D. McCarthy, P. Woulfe, J. Cronin, L. Mihai, D. Sporea, A. Santhanam, N. Agazaryan

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Proceedings Volume 9141, Optical Sensing and Detection III; 914113 (2014) https://doi.org/10.1117/12.2058572
Event: SPIE Photonics Europe, 2014, Brussels, Belgium

Abstract

A PMMA based plastic optical fibre sensor for use in real time radiotherapy dosimetry is presented. The optical fibre tip is coated with a scintillation material, terbium-doped gadolinium oxysulfide (Gd2O2S:Tb), which fluoresces when exposed to ionising radiation (X-Ray). The emitted visible light signal penetrates the sensor optical fibre and propagates along the transmitting fibre at the end of which it is remotely monitored using a fluorescence spectrometer. The results demonstrate good repeatability, with a maximum percentage error of 0.5% and the response is independent of dose rate.

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E. Lewis, S. O'Keeffe, M. Grattan, A. Hounsell, D. McCarthy, P. Woulfe, J. Cronin, L. Mihai, D. Sporea, A. Santhanam, and N. Agazaryan "Terbium-doped gadolinium oxysulfide (Gd2O2S:Tb) scintillation-based polymer optical fibre sensor for real time monitoring of radiation dose in oncology", Proc. SPIE 9141, Optical Sensing and Detection III, 914113 (15 May 2014); https://doi.org/10.1117/12.2058572

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