Göttingen 2025 – scientific programme
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ST: Fachverband Strahlen- und Medizinphysik
ST 7: Poster Session
ST 7.5: Poster
Thursday, April 3, 2025, 13:45–15:45, ZHG Foyer 1. OG
Development of a Real-Time PbWO4-based Detector System for Depth Dose Distribution Measurement in Clinical Proton Therapy — •Niclas Fiedler1, Kai-Thomas Brinkmann1, Dzmitry Kazlou1, Hans-Georg Zaunick1, and Kilian-Simon Baumann2 — 1Justus Liebig University, Giessen, Deutschland — 2Technische Hochschule Mittelhessen, Giessen, Deutschland
Proton therapy has emerged as a highly precise form of radiotherapy, leveraging the unique dose deposition characteristics of ions to maximize tumor dose while sparing surrounding healthy tissues. However, the presence of heterogeneous media can significantly broaden the Bragg peak and obscure the distal fall-off, a phenomenon quantified by the modulation power.
This project introduces a novel PbWO4-based detector system designed for real-time measurement of the depth dose distribution in proton therapy. The clinical aim is to employ a high-energy, low intensity beam and position the detector posterior to the patient, where the system achieves accurate and most importantly fast quantification of the modulation power, whilst minimizing patient radiation exposure. The real-time measurement capabilities provide rapid feedback, allowing the substitution of slow, conventional peak finders, whilst enhancing treatment adaptability in clinical settings without compromising workflow efficiency. Supported by THMconnectsFCMH.
Keywords: Bragg peak; Proton therapy; Depth dose; Modulation Power; Real-time dosimetry