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ST: Fachverband Strahlen- und Medizinphysik

ST 5: Medical Imaging

ST 5.3: Talk

Tuesday, March 16, 2021, 16:30–16:45, STa

Simulation of uncertainties in the component properties of a proton CT — •Marius Hötting, Jens Weingarten, Kevin Kröninger, and Miriam Schwarze — TU Dortmund, Lehrstuhl für Experimentelle Physik IV

In current particle therapy planning computed tomography (CT) imaging is used to predict the relative stopping power (RSP) of protons in tissue. This conversion introduces a significant uncertainty on the range of the protons, which is fundamentally based on the different interaction processes of protons and photons. To minimize the uncertainties and avoid the conversion to Hounsfield units, several groups are pursuing the development of a proton CT systems. With a Geant4 simulation, a general setup of a pCT consisting of a tracking system in front of and behind the object under investigation and a WEPL detector is implemented. The influence of the uncertainties arising from different detector properties is presented and the correlation of different parameters is discussed. The main component of the investigation is the determination of the proton path within the phantom.