S2854
RTT - RTT education, training, and advanced practice
ESTRO 2026
consistency, enhance dosimetric robustness, and streamline workflow in MR-guided adaptive treatments. Material/Methods: A retrospective analysis was conducted on 14 patients, covering the 50 most recent SBRT fractions ( ≥ 5 Gy/fraction) across various anatomical sites (prostate, liver, pancreas, adrenal gland, kidney). Plans were adapted by six radiation therapists to assess inter- planner consistency using the structured step-by-step optimization approach. Each fraction was also replanned using the conventional reference plan cost function-based method. Dosimetric comparisons were performed in Monaco (constrained mode), and planning time was recorded for each fraction.The structured approach consisted of two Stage 1 fluence optimizations to adjust constraints based on daily anatomy, followed by a Stage 2 dosimetric optimization. Results:
reported by 57.1% (n=24) of respondents, and 45.2% (n=19) described their workload as heavy or very heavy. Key consequences included treatment delays, reduced patient interaction, limited professional development opportunities, decreased job satisfaction, and increased burnout. Staff shortages were more pronounced in public sector departments. Suggested solutions included enhanced recruitment efforts, increased funding, flexible working arrangements, and the development of advanced practice roles. Conclusion: This study highlights the significant impact of staffing shortages on radiation therapy service provision and workforce sustainability in Ireland. The findings may be relevant to other countries facing similar challenges. Addressing these issues requires strategic workforce planning, policy reform, and sustained investment to ensure timely, high-quality cancer care. The implementation of targeted retention strategies, promoting flexible work models, and expanding advanced practice roles are essential to support a resilient and effective radiation therapy workforce moving forward. Keywords: workforce, staff shortage, service provision References: Borras, JM, Lievens Y, Barlton M, Corral J, Ferlay J, Bray F, et al. How Many New Cancer Patient in Europe will Require Radiotherapy by 2025? An ESTRO-HERO analysis. Radiother Oncol. 2016;119(1):5– 11Eysenbach G. Improving the Quality of Web Surveys: The Checklist for Reporting Results of Internet E- Surveys (CHERRIES). J Med Internet Res. 2004;6(3): e34. Webster A, Fog LS, Hall E, Van Rossum PSN, Nevens D, Montay-Gruel P, et al. ESTRO guidelines for developing questionnaires in survey-based radiation oncology research. Clin TranslRadiat Oncol. 2024; 51:100895. Standardized optimization to improve workflow efficiency and dosimetric robustness in magnetic resonance guided adaptive radiotherapy (MRgART) Raphael Mathieu, Bernard Lachance, Frédéric Lacroix, Janelle Morrier, Elizabeth Guimond, Isabelle Thibault, Laurence Bernier, Thomas Reynaud, William Foster, François Fabi, Éric Poulin Radio-Oncology, CHU de Québec - Université Laval, Québec, Canada Purpose/Objective: The Elekta Unity MR-Linac integrates high-resolution MRI with linear accelerator technology to enable daily adaptive radiotherapy. This study evaluates a structured step-by-step optimization strategy implemented at our institution to improve plan Proffered Paper 1674
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