Dortmund 2021 – wissenschaftliches Programm

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ST: Fachverband Strahlen- und Medizinphysik

ST 1: Radiation Therapy

ST 1.2: Vortrag

Montag, 15. März 2021, 16:15–16:30, STa

Challenges of SiPM Applications for Prompt Gamma Range Verification in Proton Therapy — •Tobias Teichmann, Martin Serfling, Hannah Jacobi, and Arno Straessner — IKTP TU Dresden, Dresden, Germany

With an increasing role of proton therapy in cancer treatment there is a growing demand on reliable, non-invasive methods for in-vivo proton range verification to be able to adapt to changes of the irradiation conditions during a treatment session and to ensure best possible protection of organs at risk. The measurement of prompt gamma radiation which is emitted along the beam track due to the interaction of the incident protons with the nuclei of the patients body has been shown to provide both temporal and spectral information which can be used to determine the proton range and have the potential to meet all desired requirements. The present work studies the application of SiPMs coupled to scintillation detectors and read out with the PETsys TOF ASIC evaluation kit as a detector for prompt gamma radiation. The combination of SiPMs with high photon detection efficiency, excellent timing resolution, low bias voltage operation and immunity to magnetic fields and the cost effective, fast and scalable PETsys read out electronics present an interesting alternative to existing approaches in prompt gamma range verification. The presentation gives an overview over the most important challenges of prompt gamma detection such as detector efficiency, data throughput, load tolerance and timing resolution and will present the status of the work at the Dresden Institute of Nuclear and Particle Physics.