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ST: Fachverband Strahlen- und Medizinphysik

ST 4: Radiation monitoring and dosimetry I

ST 4.4: Talk

Tuesday, March 22, 2022, 15:10–15:25, ST-H4

New Optimisation Method for Proton Radiography Images — Marius Hötting, Kevin Kröninger, Florian Mentzel, •Hendrik Speiser, and Jens Weingarten — TU Dortmund, department of physics

For years, proton therapy for cancer treatment has been experiencing an increasing application, as it has known advantages such as the high dose conformity of protons. However, using this precision requires enhanced imaging techniques to ensure the accurate patient alignment. This results in a reduction of the safety margin around the target volume and in the protection of the surrounding healthy tissue.
As part of a master thesis, a new method is being developed to improve the quality of proton radiography images and thereby achieve greater therapeutic success as mentioned above. At present, the image quality and the resolution of structures in the patient are degraded by proton scattering. The goal of the project is to combine the projections of the widened proton trajectories onto the image plane with conventional proton hit maps to increase the resolution of object edges in radiography images.
This talk will include a brief description of the developed method and the evaluation of the image quality using Monte Carlo simulations. Subsequently, the application of the new approach will be compared with results of previous imaging methods.