TY - GEN
T1 - Investigation of YAG:Ce based optical fibre sensor for use in external beam radiotherapy dosimetry
AU - Chen, Lingxia
AU - Chen, Shuilin
AU - Woulfe, Peter
AU - Gillespie, Sean
AU - Viphavakit, Charusluk
AU - Jiang, Benxue
AU - Lewis, Elfed
AU - O'Keeffe, Sinead
N1 - Publisher Copyright:
© OSA 2018 © 2018 The Author(s)
PY - 2018
Y1 - 2018
N2 - The main focus of this study is the evaluation of Cerium doped yttrium aluminium garnet (YAG:Ce) scintillator for its suitability for in vivo dosimetry during radiotherapy. An optical fibre sensor has been developed based on YAG:Ce and is compared with similarly fabricated sensors using Terbium activated Gadolinium Oxysulfide (GOS) and plastic scintillating fibre, BCF-12. The YAG:Ce based optical fibre sensor has a fast decay time (70 ns) and lower afterglow allowing it to accurately discern the individual micro-pulses and recovers quickly between pulses, which is not possible with the GOS based sensor. The photon yield and repeatability of the YAG sensor and is compared with the BCF-12 sensor. The YAG sensor provides a stable output signal, 12 times higher than that observed with the BCF-12 sensor, with a coefficient of variation of 0.7 %, which is lower than the BCF sensor (1.4 %).
AB - The main focus of this study is the evaluation of Cerium doped yttrium aluminium garnet (YAG:Ce) scintillator for its suitability for in vivo dosimetry during radiotherapy. An optical fibre sensor has been developed based on YAG:Ce and is compared with similarly fabricated sensors using Terbium activated Gadolinium Oxysulfide (GOS) and plastic scintillating fibre, BCF-12. The YAG:Ce based optical fibre sensor has a fast decay time (70 ns) and lower afterglow allowing it to accurately discern the individual micro-pulses and recovers quickly between pulses, which is not possible with the GOS based sensor. The photon yield and repeatability of the YAG sensor and is compared with the BCF-12 sensor. The YAG sensor provides a stable output signal, 12 times higher than that observed with the BCF-12 sensor, with a coefficient of variation of 0.7 %, which is lower than the BCF sensor (1.4 %).
UR - http://www.scopus.com/inward/record.url?scp=85059449742&partnerID=8YFLogxK
U2 - 10.1364/ofs.2018.tue100
DO - 10.1364/ofs.2018.tue100
M3 - Conference contribution
AN - SCOPUS:85059449742
SN - 9781943580507
T3 - Optics InfoBase Conference Papers
BT - Optical Fiber Sensors, OFS 2018
PB - Optica Publishing Group (formerly OSA)
T2 - Optical Fiber Sensors, OFS 2018
Y2 - 24 September 2018 through 28 September 2018
ER -