TY - GEN
T1 - Ultra sensitive high temporal resolution measurement of X-Ray pulses from modern Linac machines
AU - Chen, Lingxia
AU - Lewis, Elfed
AU - Zhao, Wenhui
AU - Woulfe, Peter
AU - Gillespie, Sean
AU - O'Keeffe, Sinead
N1 - Publisher Copyright:
© 2017 IEEE.
PY - 2017/12/21
Y1 - 2017/12/21
N2 - Inorganic phosphor material, gadolinium oxysulphide active with terbium (Gd2O2S:Tb3+) has been previously investigated as a scintillator used in the dosimeter to detect the X-Ray dose due to its high light yield efficiency of converting the X-Ray into the visible green lights. Apart from the properties of light yield efficiency, fast scintillation and lower energy resolution matters for the clinic applications. Therefore, this work is focusing on the difference between the long and short decay time of the scintillator when the sensors are exposed to radiation source delivered by a modern LINAC (Linear accelerator) machine. Herein, the output signal with up to 40 ns temporal resolution has been measured. The final results show that inorganic phosphor material used in this study with long decay time (Gd2O2S:Tb3+) has a heavy after-glow phenomena compared with the organic scintillator with short decay time (BCF-12 scintillating fibre). This work is to show the magnitude of difference of the photon yield efficiency and decay time between the Gd2O2S:Tb3+ and the BCF-12. The output intensity of Gd2O2S:Tb3+ is approximately 180 times higher than the BCF-12's, however the BCF-12 can effectively profile the duration of the radiation source against the beam on time.
AB - Inorganic phosphor material, gadolinium oxysulphide active with terbium (Gd2O2S:Tb3+) has been previously investigated as a scintillator used in the dosimeter to detect the X-Ray dose due to its high light yield efficiency of converting the X-Ray into the visible green lights. Apart from the properties of light yield efficiency, fast scintillation and lower energy resolution matters for the clinic applications. Therefore, this work is focusing on the difference between the long and short decay time of the scintillator when the sensors are exposed to radiation source delivered by a modern LINAC (Linear accelerator) machine. Herein, the output signal with up to 40 ns temporal resolution has been measured. The final results show that inorganic phosphor material used in this study with long decay time (Gd2O2S:Tb3+) has a heavy after-glow phenomena compared with the organic scintillator with short decay time (BCF-12 scintillating fibre). This work is to show the magnitude of difference of the photon yield efficiency and decay time between the Gd2O2S:Tb3+ and the BCF-12. The output intensity of Gd2O2S:Tb3+ is approximately 180 times higher than the BCF-12's, however the BCF-12 can effectively profile the duration of the radiation source against the beam on time.
KW - dosimeter
KW - external beam radiotherapy
KW - high temporal resolution
KW - optical fibre sensors
KW - real-time radiation dose measurement
UR - http://www.scopus.com/inward/record.url?scp=85044272104&partnerID=8YFLogxK
U2 - 10.1109/ICSENS.2017.8234375
DO - 10.1109/ICSENS.2017.8234375
M3 - Conference contribution
AN - SCOPUS:85044272104
T3 - Proceedings of IEEE Sensors
SP - 1
EP - 3
BT - IEEE SENSORS 2017 - Conference Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 16th IEEE SENSORS Conference, ICSENS 2017
Y2 - 30 October 2017 through 1 November 2017
ER -