ESTRO 2025 - Abstract Book

S4096

RTT - Patient care, preparation, immobilisation and IGRT verification protocols

ESTRO 2025

Figure 2. Bar chart showing median and error bars (first and third quartiles) for treatment and matching CBCT time across age groups

Conclusion: Larger shifts (>5 mm) occurred less frequently in both the youngest (under anesthesia) and the oldest groups, highlighting age-related differences in positioning accuracy and setup reproducibility. The 6-12-year-old cohort, treated without anesthesia, showed the highest incidence of significant shifts, likely due to the patient's compliance to positioning in this age range. These findings outline the essential role of radiation therapists in supporting patients employing soft skills and improving immobilization strategies, including tailored head supports for the 6– 12-years old.

Keywords: pediatric brain tumors, patient positioning, IGRT

References: Lei Z, Shi Y, Liu Y, et al. Evaluation of the positional reproducibility of sedation versus non-sedation state in pediatric radiotherapy: a retrospective study. Front Oncol. 2024;14:1475060. Published 2024 Oct 29. doi:10.3389/fonc.2024.1475060

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Digital Poster Breath by Breath: Learning from Ventilation Parameters to enhance Stereotactic Radiotherapy with MANIV in Liver and Pancreatic Cancer Nicolas Audag 1,2,3 , Ana Francisca Neves Marques 4 , Genevieve Van Ooteghem 5,4 1 Institut de Recherche Expérimentale et Clinique (IREC), Pôle de Pneumologie, ORL (airways) & Dermatologie (skin), Groupe Recherche en Kinésithérapie Respiratoire, Université Catholique de Louvain, Brussels, Belgium. 2 Service de kinésithérapie et ergothérapie, Cliniques universitaires Saint-Luc, Brussels, Belgium. 3 Service de Pneumologie, Cliniques universitaires Saint-Luc, Brussels, Belgium. 4 Service de Radiothérapie oncologique, Cliniques universitaires Saint-Luc, Brussels, Belgium. 5 Institut de Recherche Expérimentale et Clinique (IREC), Molecular Imaging- Radiotherapy and Oncology (MIRO), Université Catholique de Louvain, Brussels, Belgium Purpose/Objective: Mechanically-assisted non-invasive ventilation (MANIV) is an innovative technique aiming to regularise the breathing pattern during radiotherapy in unsedated patients [1-3]. A deeper understanding of ventilation parameters will