Göttingen 2025 – wissenschaftliches Programm
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ST: Fachverband Strahlen- und Medizinphysik
ST 8: Particle Radiography
ST 8.3: Vortrag
Donnerstag, 3. April 2025, 16:45–17:00, ZHG003
Simulations of detector setups for Helium Radiography and CT — Alexander Dierlamm1, Tim Gehrke2, Ulrich Husemann1, Oliver Jäkel2, Maria Martisikova2, and •Linus Schlee1 — 1Institute of Experimental Particle Physics (ETP), Karlsruhe Institute of Technology (KIT) — 2Medical Physics in Radiation Oncology, German Cancer Research Center (DKFZ), Heidelberg
For the precise irradiation treatment of cancers that are located near critical tissues, ion beam therapy has been developed as an efficient and highly conformal treatment compared to x-ray therapy. Compared to the established methods with proton or carbon beams, helium provides a higher linear energy transfer than protons while causing less secondary radiation than heavier nuclei like carbon. To obtain higher precision with helium therapy, precise knowledge of the integrated stopping power of the affected region is needed. In future, the imaging for the treatment planning could be performed by the same He ions but at higher energies compared to the therapeutic range. In this talk, research on detector setups involving helium beams is presented. With the Allpix2-Framework, the path of ions through a plexiglass-phantom (PMMA) and the resulting hits and signals of different detector setups are simulated. With subsequent analysis of simulated detector data on the positions and deposited energies of tracked particles, the goal is to optimise the setups to achieve higher measurement accuracy. The simulations are based on and compared to existing setups at the German Cancer Research Center (DKFZ).
Keywords: Radiography; Helium; Simulation