Dortmund 2021 – wissenschaftliches Programm
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ST: Fachverband Strahlen- und Medizinphysik
ST 12: Compton Cameras
ST 12.5: Vortrag
Donnerstag, 18. März 2021, 17:00–17:15, STa
Performance Optimization of the SiFi-CC based on Geant4 Simulations — •Jonas Kasper1, Ronja Hetzel1, Awal Awal1, Achim Stahl1, Pascal Wirtz1, Aleksandra Wronska2, Nadja Kohlhase3, and Magdalena Rafecas3 — 1RWTH Aachen University - Physics Institute III B, Aachen, Germany — 2M. Smoluchowski Institute of Physics, Jagiellonian University Kraków, Poland — 3Institute of Medical Engineering, University of Lübeck, Lübeck
Online monitoring of the beam range is considered as one of the most important challenges in hadron therapy. Monitoring systems based on the detection of prompt gamma radiation are one of the most promising option for this task. A Compton Camera, yielding the full three-dimensional dose distribution, is one of the favoured setups.
Scientist of the RWTH University, the Jagiellonian University Kraków and the University Lübeck develop the SiPM and scintillating Fiber-based Compton Camera (SiFi-CC) to detect prompt gamma radiation. The SiFi-CC consists of two modules, the scatterer and the absorber. Both modules are built from stacked LYSO fibers read out by SiPMs. The setup and the data acquisition system of the SiFi-CC need to be optimized for the environment of the hadron therapy to cope with high rates and large backgrounds. Different parameters like the module thicknesses, the event timing window and the distances within the detector can be optimized based on Geant4 simulations. The generation of the simulation data, different steps of the simulation data analysis, the determination of the performance and first result of the optimization process will be presented.