ESTRO 2025 - Abstract Book

S367

Brachytherapy - Physics

ESTRO 2025

Conclusion: The combination of PSD and Hyperscint-RP200 spectrometer showed a high sensitivity at low dose rates for both acquisition frequencies. Deviations in source-dosimeter distance, due to the CCU/afterloader reproducibility, show potential limitations for experimental calibration practices in high dose gradients. Further work will focus on the calibration of both single and multi-point PSDs for brachytherapy.

Keywords: In-vivo dosimetry, Scintillation, PSD

References: Jean, E., Therriault-Proulx, F. and Beaulieu, L. (2021) ‘Comparative optic and dosimetric characterization of the HYPERSCINT scintillation dosimetry research platform for multipoint applications’, Physics in Medicine and Biology , 66(8). Available at: https://doi.org/10.1088/1361-6560/abf1bd. Rivard, M.J. et al. (2004) ‘Update of AAPM Task Group No. 43 Report: A revised AAPM protocol for brachytherapy dose calculations’, Medical Physics , 31(3), pp. 633–674. Available at: https://doi.org/10.1118/1.1646040.