TY - GEN
T1 - Preliminary investigation of radiation dose sensors based on aluminum-doped silicate optical fibers
AU - Olivero, Massimo
AU - Mirigaldi, Alessandro
AU - Blanc, Wilfried
AU - Benabdesselam, Mourad
AU - Mady, Franck
AU - Molardi, Carlo
AU - Tosi, Daniele
AU - Vallan, Alberto
AU - Perrone, Guido
N1 - Publisher Copyright:
© 2020 IEEE.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/6
Y1 - 2020/6
N2 - The paper reports on the first demonstration of in-situ, real-time dosimetry realized with an enhanced back-scattering optical fiber and a high-resolution optical back-scattering reflectometry measurement. This work is devised to overcome the current problems in monitoring radiotherapy treatments, in particular the difficult evaluation of not only the actual x-ray dose that is accumulated on the target volume, but also the distribution profile of the ionizing radiation beam. The experiments have been conducted by evaluating the radiation- induced spectral shift of the Rayleigh back-scattering along the fiber under test during x-ray exposure, in a radiation chamber. The sensing region is a section of aluminum-doped silicate fiber, that overcomes the poor sensitivity to radiation of standard, germanium-doped, silicate fibers for telecom applications. The preliminary results show that it is possible to remotely track the x-ray dose at high dose rates (700 Gy/min) and at rates closer to therapeutic values (22 Gy/min). A linear relationship between accumulated dose and spectral shift has been found. This research aims at developing a dose sensor with the most demanding features of small form factor, spatial profiling and remote interrogation.
AB - The paper reports on the first demonstration of in-situ, real-time dosimetry realized with an enhanced back-scattering optical fiber and a high-resolution optical back-scattering reflectometry measurement. This work is devised to overcome the current problems in monitoring radiotherapy treatments, in particular the difficult evaluation of not only the actual x-ray dose that is accumulated on the target volume, but also the distribution profile of the ionizing radiation beam. The experiments have been conducted by evaluating the radiation- induced spectral shift of the Rayleigh back-scattering along the fiber under test during x-ray exposure, in a radiation chamber. The sensing region is a section of aluminum-doped silicate fiber, that overcomes the poor sensitivity to radiation of standard, germanium-doped, silicate fibers for telecom applications. The preliminary results show that it is possible to remotely track the x-ray dose at high dose rates (700 Gy/min) and at rates closer to therapeutic values (22 Gy/min). A linear relationship between accumulated dose and spectral shift has been found. This research aims at developing a dose sensor with the most demanding features of small form factor, spatial profiling and remote interrogation.
KW - Ionizing radiation sensors
KW - Optical fiber sensors
KW - Radiation dosage
KW - Radiation monitoring
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U2 - 10.1109/MeMeA49120.2020.9137331
DO - 10.1109/MeMeA49120.2020.9137331
M3 - Conference contribution
AN - SCOPUS:85088893053
T3 - IEEE Medical Measurements and Applications, MeMeA 2020 - Conference Proceedings
BT - IEEE Medical Measurements and Applications, MeMeA 2020 - Conference Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 15th IEEE International Symposium on Medical Measurements and Applications, MeMeA 2020
Y2 - 1 June 2020 through 3 June 2020
ER -