ESTRO 2025 - Abstract Book

S2660

Physics - Detectors, dose measurement and phantoms

ESTRO 2025

by the PTW company. The comparison was also used to estimate a water equivalent thickness of the GCal of about 4 mm.

Conclusion: The experiments carried out with both the UHDR proton and electorn beams allowed to demonstrate the suitability of the GCal for FLASH radiotherapy dosimetry paving the way towards the standardization of the practical use of this device in the perspective of a clinical translation of FLASH radiotherapy.

Keywords: FLASH radiotherapy, calorimetry, dosimetry

References: Bass GA, Shipley DR, Flynn SF, and Thomas RAS. A prototype low-cost secondary standard calorimeter for reference dosimetry with ultra-high pulse dose rates. Br J Radiol 2023; 96 : 20220638