Berlin 2024 – wissenschaftliches Programm
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ST: Fachverband Strahlen- und Medizinphysik
ST 3: Radiation Therapy II
ST 3.4: Vortrag
Dienstag, 19. März 2024, 11:45–12:00, PC 203
Progress of a Geant4 Simulation for the SiFi-CC Compton camera project in proton therapy — •Linn Mielke1, Achim Stahl1, Ronja Hetzel1, Alexander Fenger1, Jonas Kasper1, Monika Kercz1,2, Magdalena Kołodziej2, Magdalena Rafecas3, Katarzyna Rusiecka2, and Aleksandra Wrońska2 — 1III. Physikalisches Institut B, RWTH Aachen University — 2M. Smoluchowski Institute of Physics, Jagiellonian University Kraków, Poland — 3Institute of Medical Engineering, University of Lübeck
Proton therapy is a clinically established cancer treatment characterized by its precise dose deposition. However, a prerequisite to this advantage is that there are no discrepancies between what is foreseen by the treatment plan and the actual deposition. One approach to monitor such shifts is to detect the prompt gamma radiation from the proton interactions inside a patient. The SiPM and scintillating Fiber-based Compton Camera (SiFi-CC) project is an example of this approach. The full camera consists of a scatterer and an absorber, both of which are constructed by layering LYSO fibers read out in SiPMs. Ideally, the origin of each detected prompt gamma lies somewhere on the surface of its associated Compton cone. With enough cones, the position of the Bragg peak can be inferred. The concept is tested in a multi-step Geant4 simulation, where a beam shift can be artificially generated and retrieved. This talk will focus on the simulation side of the project, its structure and results as well as recent developments.
Keywords: proton therapy; Geant4; prompt gamma imaging; Compton camera; simulation