ESTRO 2024 - Abstract Book

S3316

Physics - Detectors, dose measurement and phantoms

ESTRO 2024

Conclusion:

The results demonstrated that the differences between the physics lists for the simulations of k Q factors are within 0.2%, which is small compared to the associated uncertainty. Therefore, no clear preference for the physics list can be derived for the study of k Q factors in carbon-ion beams. Comparisons of our results with experimental data show clinically relevant discrepancies for both investigated chambers. To better understand the differences, further studies using other Monte Carlo codes or additional experimental studies are still necessary. Nevertheless, this work represents an important step contributing to higher accuracy in the dosimetry of carbon-ion beams.

Keywords: Particle therapy, Monte Carlo, correction factors

References:

[1] Osinga-Blättermann et al 2018 Determination of k Q factors for cylindrical and plane-parallel ionization chambers in a scanned carbon ion beam by means of cross calibration Phys. Med. Biol. 64 015009

[2] DIN 6800-2 2020 Procedures of dosimetry with probe-type detectors for photon and electron radiation - Part 2

[3] Holm et al 2022 Direct determination of k Q for Farmer-type ionization chambers in a clinical scanned carbon-ion beam using water calorimetry Phys. Med. Bio. 67 049401

[4] OpenGATE Collaboration 2023 GATE Documentation (opengate.readthedocs.io), last accessed 24.10.2023