ESTRO 2024 - Abstract Book

S3231

Physics - Detectors, dose measurement and phantoms

ESTRO 2024

Figure 2 A generalised methodology to assess radiation shielding for FLASH proton beam conditions

Keywords: FLASH, protons, radiation protection

References:

[1] ICRP Publication 74; Conversion Coefficients for use in Radiological Protection against External Radiation; Annals of the ICRP; January 1997

[2] ICRP Publication 116; Conversion Coefficients for Radiological Protection Quantities for External Radiation Exposures; Annals of the ICRP; July 2012

1094

Digital Poster

A New Detector Based on Heterogeneous Cavities for Spatially Microfractionated Radiation Therapy

Florian Thevenet 1 , Sarvenaz Keshmiri 2 , Guo-Neng Lu 1 , Jean-François Adam 2,3 , Patrick Pittet 1

1 Université de Lyon, INSA-Lyon, ECL, UCBL, CPE, CNRS, Institut des Nanotechnologies de Lyon (INL-UMR5270), Villeurbanne, France. 2 Université Grenoble-Alpes, Inserm, STROBE (UA7), Grenoble, France. 3 Centre Hospitalier Universitaire Grenoble-Alpes, STROBE (UA7), Grenoble, France

Purpose/Objective:

Microbeam Radiation Therapy (MRT), which uses high-dose-rate orthovoltage X-rays for submillimeter fractionated radiotherapy, could achieve local tumor control with considerably improved tolerance of normal tissues.[1] Detector selection for real-time MRT dosimetry must take into account the size of the sensitive cavities (volume-averaging effect) and its tissue equivalence (energy dependence and dose perturbation). Most real-time detectors, which rely