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

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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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