Göttingen 2025 – wissenschaftliches Programm

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ST: Fachverband Strahlen- und Medizinphysik

ST 6: Medical Imaging and Treatment Monitoring

ST 6.4: Vortrag

Donnerstag, 3. April 2025, 11:45–12:00, ZHG003

Development of a Compton Camera for Biological and Medical Imaging — •Yazeed Balasmeh, Daniel Berker, Ivor Fleck, and Lars Maczey — Experimentelle Teilchenphysik, Center for Particle Physics Siegen, Universität Siegen

The Compton Camera offers a novel, collimator-free imaging technology based on Compton scattering, addressing the need for advanced imaging systems capable of detecting high-energy gamma rays above 1 MeV. Its versatility makes it suitable for medical imaging applications, real-time dosimetry, and dynamic adjustments in particle beam therapies, particularly in cancer treatment.

In this talk, I will present the development of a novel Compton Camera at the University of Siegen, designed for high-energy gamma ray imaging. The system features an enhanced scattering layer to increase interaction probability and generate Cherenkov photons, allowing precise determination of interaction depth and electron trajectories. Measuring the scattered gamma ray and recoil electron energies enables accurate source localization. Incorporating electron tracking further improves spatial resolution by narrowing the possible gamma ray path. Additionally, GEANT4 simulations were employed to optimize device geometry and compare different scintillation materials, with depth of interaction (DOI) measurements validated against experimental results to refine performance.

Keywords: Medical imaging; Geant4; Silicon photomultipliers; Cherenkov Photons