ESTRO 2025 - Abstract Book

S3587

Physics - Quality assurance and auditing

ESTRO 2025

Fig 2. Distribution of output deviation differences.

Conclusion: The 2% tolerance level for beam output checks with the MVI was confirmed in long-term clinical practice. Incidentally, we discovered that cross calibrations should only be approved if their accompanying output deviation differences are within 0.6 pp. Our procedures were updated accordingly.

Keywords: Unity, Dosimetry, MV imager

References: [1] Hilgers GC, Ikink M, Potters I, Schuring D. Beam output checks of a commercial high-field magnetic resonance guided radiotherapy machine with its on-board megavoltage imager. Phys Imaging Radiat Oncol. 2023 Jan 11;25:100411. doi: 10.1016/j.phro.2023.100411. [2] Hilgers GC, Ikink M, Potters I, Schuring D, Minken AW. Characterization of the on-board megavoltage imager in a magnetic resonance-guided radiotherapy machine for beam output checks. Phys Imaging Radiat Oncol. 2024 Feb 16;29:100558. doi: 10.1016/j.phro.2024.100558.

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Digital Poster A Data-Driven Approach to Risk Management in Radiation Oncology: Enhancing Safety through Real-Time Incident Reporting Lukas Sölkner, Dietmar Georg, Uwe Wolff, Andreas Renner, Joachim Widder, Gerd Heilemann Department of Radiation Oncology, University Hospital Vienna/Medical University of Vienna, Vienna, Austria Purpose/Objective: To showcase a data-driven risk management strategy in radiation oncology by implementing an in-house web based incident reporting system. This system leverages comprehensive data collection and real-time analytics to identify trends, prioritize risks, and inform proactive interventions. By harnessing detailed incident data, we aim to enhance clinical safety, optimize treatment workflows, and support evidence-based decision-making in patient care. Material/Methods: We developed a web-based system enabling multidisciplinary staff to report incidents in real-time, supporting anonymous submissions with detailed data capture. Over five years (2019-2024), incident data informed biweekly