Berlin 2024 – scientific programme
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ST: Fachverband Strahlen- und Medizinphysik
ST 3: Radiation Therapy II
ST 3.1: Talk
Tuesday, March 19, 2024, 11:00–11:15, PC 203
A High-Performance Particle Tracker Based on CBM Silicon Strip Detectors for Range Verification in Heavy-Ion Therapy — •Devin Hymers1, Sebastian Schroeder1, Olga Bertini2, Johann Heuser2, Joerg Lehnert2, Christian Joachim Schmidt2, and Dennis Mucher1 — 1Institut für Kernphysik, Universität zu Köln, Köln, Germany — 2GSI GmbH, Darmstadt, Germany
The growing societal burden of cancer necessitates improvement in safety and efficacy of radiation therapy. Scanned heavy-ion therapy provides precise and highly conformal dose delivery, but inherent uncertainties make it difficult to ensure accuracy. Filtered Interaction Vertex Imaging (fIVI) has been demonstrated to have potential as a relative range verification method with sub-millimeter accuracy, to ensure full and consistent tumour coverage in treatment [1]. A high-performance system, based on modern strip-segmented silicon detectors originally developed for the Compressed Baryonic Matter (CBM) experiment at GSI, is being adapted for use in fIVI. These sensors have a segment pitch of 58 microns, cover a large sensitive area of up to 72 cm2, and are capable of count rates up to 250 kHz on each segment, in line with the expected requirements for fIVI under clinical conditions. These detectors are coupled to a parallel, pipeline-based analysis system, for high-efficiency data processing. Results of initial tests on detector and analysis software performance will be presented, along with the expected precision of the setup.
[1] Hymers et al 2021 Phys. Med. Biol. 66 245022
Keywords: Range Monitoring; Silicon Detectors; Heavy-Ion Therapy; Interaction Vertex Imaging