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Collapsed photonic crystal fibre thermoluminescence dosimetry for external beam radiotherapy

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DOI: 10.1016/j.jrras.2023.100526

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Percentage depth doses (PDD); Threshold dose; Reproducibility; Dose-rate dependency; Ge-doped collapsed photonic crystal fibre; (PCF); Solid water equivalent phantoms

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This study focuses on the key thermoluminescent dosimetric responses of Ge-doped collapsed photonic crystal fiber (PCF), which offers higher sensitivity than conventional single-mode optical fibers. The results show a favorable comparison with ionization chamber values (typically within 5%) when using a linac operated at 6 and 10 MV. Threshold dose, reproducibility, and dose-rate dependency were also characterized.
In measuring exposure to ionizing radiation various detectors and techniques have been developed. Current investigation is of key TL dosimetric responses of Ge-doped collapsed photonic crystal fibre (PCF), a form offering the advantage of greater sensitivity compared to more conventional single-mode optical fibers. The PCF samples that have been studied herein have been used to obtain external photon beam percentage depth doses (PDD), elevated sensitivity being desirable in providing a basis for the capture of the range of doses. Using a linac operated at 6 and 10 MV, the results show a favourable comparison with ionization chamber values (typically to within 5%). Threshold dose, reproducibility, and dose-rate dependency have also been characterized.

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