ESTRO 2025 - Abstract Book

S4406

RTT - Treatment planning, OAR and target definitions

ESTRO 2025

Conclusion: The results show that specially trained therapists can alleviate the additional time burden of oART for physicians in a high volume oART SBRT clinic. Additionally, TD-ABC analysis demonstrated cost reduction with APRT based adaptor models. By redefining the roles within the adaptive radiotherapy team, substantial improvements in workflow and cost-effectiveness can be achieved, potentially promoting a sustainable approach to delivering personalized cancer treatments. These findings suggest that incorporating a dedicated APRT not only enhances operational efficiency but offers a new career advancement pathway for radiation therapists, potentially addressing critical issues like job satisfaction and staff retention. References: 1. Keel G, Savage C, Rafiq M, Mazzocato P. Time-driven activity-based costing in health care: A systematic review of the literature. Health Policy. 2017 Jul;121(7):755-763. doi: 10.1016/j.healthpol.2017.04.013. Epub 2017 May 10. PMID: 28535996. 2. Beckert R, Schiff JP, Morris E, Samson P, Kim H, Laugeman E. The impact of an Advanced Practice Radiation Therapist contouring for a CBCT-based adaptive radiotherapy program. Tech Innov Patient Support Radiat Oncol. 2024 Mar 1;30:100242. doi: 10.1016/j.tipsro.2024.100242. PMID: 38495830; PMCID: PMC10940769. Digital Poster Hypofractionated radiotherapy for breast cancer after mastectomy : can dosimetric constraints be achieved? Nadia Bouzid, Rym zanzouri, Mouna Bakkali, Bochra Naija, Imene Meddeb, Amal Chamsi, Ons Bettaieb, Dalia Yazid, Sabrine Tbessi, Samia Kanoun, Sameh Tebra Radiation Oncology, Farhat Hached Hospital, Sousse, Tunisia Purpose/Objective: In recent years, hypofractionated radiotherapy for breast cancer has become the standard in order to help de escalate the therapeutic burden. The aim of our study is to assess compliance with dosimetric constraints in hypofractionated radiotherapy for breast cancer. Material/Methods: A descriptive, analytical study carried out with 140 breast cancer patients after radical surgery, treated with hypofractionated locoregional radiotherapy (RT), delivering a dose of 40 Gy in 15 fractions over 3 weeks, using three-dimensional conformal RT, at the Oncological Radiotherapy department of the Farhat Hached Hospital, Sousse, Tunisia between 2022 and 2023. Keywords: APRT, Contouring, Adaptor Models 4411