S1501
Interdisciplinary - Quality assurance and risk management
ESTRO 2026
Conclusion: This framework aims to help departments create their own local business continuity protocols in collaboration with RO staff and IT specialists. Since it is only a matter of ‘when’, not ‘if’, the preparation of such protocols must be given the highest priority. Keywords: Cyberattack, Business Continuity, ESTRO Framework
Results: A total of 3,091 treatment plans were reviewed: 533 in 2022 (178 plans with 224comments), 886 in 2023 (241 with 263 comments), 1,367 in 2024 (332 with 358 comments), and305 in 2025 to date (57 with 95 comments). Distribution summarized in Figure 1. The mostfrequently used techniques were volumetric modulated arc therapy (VMAT) (45.6%) andthree- dimensional conformal radiotherapy (3DCRT) (39.6%). The pelvic region accounted for thelargest number of plans across all years, while the thoracic region (including lung and breast)showed the highest proportion of suggested changes. Among radiation oncologists, the mostfrequent comments concerned clinical target volume delineation (cPTV). Among physicists anddosimetrists, dose to planning target volume (PTVd) predominated in 2022–2023, while planparameters (PP) and organ-at-risk dose (OARd) were most frequent in 2024–2025.Figure 1. Annual percentage of plans without and with comments.
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Experience and analysis in 4 years of weekly peer review at a Radiation Oncology Department Adela Poitevin-Chacón 1 , Viridiana Hernández-GArcía 2 , Rubi Ramos-Prudencio 1 , Hidralba Lòpez-Pèrez 1 , José A Jiménez_acosta 2 , Álvaro D Cruz-Cortés 1 , Sergio A Garcia- García 1 , Alejandro Calvo-Fernández 1 , Jesús Linares- Miranda 1 , Julio C Martínez Robledo 1 1 Radiation Oncology, Médica Sur, México, Mexico. 2 Radiation Oncology, Médica Sur, Mexico, Mexico Purpose/Objective: Peer review in radiotherapy is a structured, multidisciplinary quality assurance process in whichtreatment plans are independently evaluated to assess the accuracy and appropriateness of targetdelineation, dose prescription, and planning parameters. Through reduced variability andadherence to standards, this process improves treatment consistency and patient safety.This study aimed to evaluate the impact of weekly peer-review meetings ontreatment plan quality in a radiation oncology department, focusing on the identification andcorrection of clinical and dosimetric improvements, while fostering shared learning within amultidisciplinary team Material/Methods: A retrospective analysis was conducted on data from weekly peer-reviewmeetings held between April 2022 and July 2025 at the Radiation Oncology Department of MédicaSur (Mexico City). Each session involved at least two radiation oncologists, two medical physicistsand two dosimetrists. Information was processed using custom Python 3.15 scripts. Comments weregrouped into 10 categories based on clinical and technical content. Descriptive statisticswere applied to analyze frequencies and trends.Table 1. Comment category classifications.
Conclusion: Approximately 30% of plans showed opportunities for improvement, mainly inclinical (cPTV) and technical (PTVd, OARd) aspects, underscoring the essential role ofmultidisciplinary peer review in maintaining treatment quality and patient safety. References: Jomy J, Lu R, Sharma R, et al. Systematic review and meta-analysis on the impact of institutional peer review in RO. Radiother Oncol. 2025Marks L, Adams R, Pawlicki T, et al. Enhancing the role of case-oriented peer review to improve quality and safety in RO: Executive summary. Pract Radiat Oncol. 2013.Abutaha
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