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Optical fiber dosimeter for real-time in-vivo dose monitoring during LDR brachytherapy

Date
2020
Abstract
An optical fiber sensor for monitoring low dose radiation is presented. The sensor, based on radiation sensitive scintillation material, terbium doped gadolinium oxysulphide (Gd2O2S:Tb), is embedded in a cavity of 700μm diameter within a 1mm plastic optical fiber. The sensor is compared with the treatment planning system for repeatability, angular dependency, distance and accumulated radiation activity. The sensor demonstrates a high sensitivity of 152 photon counts/Gy with a temporal resolution of 0.1 seconds, with the largest repeatability error of 4.1%, to 0.361mCi of Iodine-125 the radioactive source most commonly used in LDR brachytherapy for treating prostate cancer.
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Description
peer-reviewed
Publisher
Optical Society of America
Citation
Biomedical Optics Express;11,(7) pp. 4027- 4036
Collections
Electronic & Computer Engineering
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Woulfe_2020_Optical.pdf
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Keywords
radioactive, prostate cancer, LDR brachytherapy
ULRR Identifiers
https://hdl.handle.net/10344/8989
 https://doi.org/10.34961/3884
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Funding Information
Royal Historical Society, Science Foundation Ireland (SFI)
Sustainable Development Goals
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