Dortmund 2021 – wissenschaftliches Programm
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ST: Fachverband Strahlen- und Medizinphysik
ST 1: Radiation Therapy
ST 1.1: Vortrag
Montag, 15. März 2021, 16:00–16:15, STa
MC study of prompt gamma production in water by protons of 100-250 MeV energy — •Mariam Abuladze1, Jonas Kasper2, Ronja Hetzel2, Revaz Shanidze1,3, and Achim Stahl2 — 1Kutaisi International University, Kutaisi, Georgia — 2RWTH Aachen University, Aachen, Germany — 3Tbilisi State University, Tbilisi, Georgia
Proton therapy is a relatively new and advanced method of radiation treatment of cancerous tumors. The characteristic feature of this treatment modality is a high localization of energy deposit (Bragg peak) in a tumor, which requires a precise monitoring of the proton beam position in the patient. Prompt gamma radiation, which is produced during the ionization losses of the protons in a matter (patient) could be used for imaging of the beam position and hence for the proton therapy treatment control.
We used Geant4 toolkit for the MC study of the characteristics of the prompt gamma radiation produced by protons in the energy range of 100-250 MeV. Energy spectra, production vertices and directions of prompt gammas produced with the protons in the water phantom were studied, as well as the correlations with the Bragg location. This information is necessary for the development of prompt gamma imaging (PGI) devices. Several PGI-detectors are currently under consideration by different research groups, involved in the proton/ion therapy worldwide