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ST: Fachverband Strahlen- und Medizinphysik
ST 9: Radiation Therapy
ST 9.4: Talk
Thursday, March 23, 2023, 16:35–16:50, ZEU/0146
Prompt gamma-ray timing for online proton range verification - status quo — •Krystsina Makarevich1,2, Katja E. Römer3, Sonja M. Schellhammer1,2, Joseph A. B. Turko3, Andreas Wagner3, and Toni Kögler1,2 — 1Helmholtz - Zentrum Dresden - Rossendorf, Institute of Radiooncology - OncoRay, Dresden, Germany — 2OncoRay - National Center for Radiation Research in Oncology, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Helmholtz - Zentrum Dresden - Rossendorf, Dresden, Germany — 3Helmholtz - Zentrum Dresden - Rossendorf, Institute of Radiation Physics, Dresden, Germany
The prompt gamma-ray timing (PGT) technique is a promising candidate for proton therapy range verification as it is light-weighted, can be integrated into existing therapy systems, and introduces no additional dose to patients. This work explains the physical basics of the PGT method and gives an overview of a setup developed for future integration into clinical practice. Currently, the PGT technique undergoes extensive testing under close-to-clinical conditions so to prepare for the first in-human application. The latest measurements with an anthropomorphic head phantom irradiated with clinical treatment plans are delineated. The work sets out the main outcomes of this experiment such as the choice of the detector crystal size, the relationship between the detector load and the processed count rate, the influence of the range shifter on the PGT distributions, etc. An overview of the directions for future investigations is presented.