Two‐step beam geometry optimization for volumetric modulated arc therapy gantry angles in breast treatments

We can obtain in an automatic fashion clinically acceptable breast treatment plans, dosimetrically comparable with the manual ones, by combining an initial BG set-up with a dosimetric refinement step for the beam angles. The initial ML-based plans are a useful starting point while they need further refining which the dosimetric fine-tuning provides. The work paves the way to the automation of the BG setup that has the potential for considerable savings of planner's time, and a decrease in the variation of the quality of the plans.