ESTRO 2025 - Abstract Book

S2723

Physics - Dose prediction, optimisation and applications of photon and electron planning

ESTRO 2025

Results: Electrons contributed on average 41% to the CTV dose in the DYMBARC plans. The dosimetric endpoints for all DIBH variations and plans of the CTV and OARs are shown in Figure 1. DYMBARC demonstrates significantly better OAR sparing for the considered endpoints compared to VMAT. Mean dose to the heart and contralateral breast was 0.8 Gy lower on average for RO-DYMBARC than PTV-based VMAT. Figure 1c shows the robustness of CTV endpoints to the DIBH variations. In all three plans, OARs were only minimally affected by the DIBH variations, with a maximum mean dose difference of 0.1 Gy.