ESTRO 2020 Abstract Book

S811 ESTRO 2020

Conclusion The two KB models used for planning allow an homogeneous plan quality and some dosimetric gains. Further investigations will be carry out to improve the models. Firstly, it will be performed an external validation of the two models by different centers. Then, an evaluation plans data-set will be generated internally by less experienced planner. Sequentially, sub-KB models will be developed splitting right and left breast cases. Finally, twins A and B models will be generated without the optimization structures. Up to our knowledge, these are the first KB models taking into account whole-breast irradiation comprehensive of nodal station. This KB approach effectively refine plans optimization and could be helpful in clinical practice, in particular in a centre where there are planners with different expertise, in order to standardize and improve the quality of the plans. PO-1504 Pareto navigation guided automated planning: is a single patient enough to calibrate a solution? I. Foster 1 , P. Wheeler 2 , E. Spezi 1 , J. Staffurth 3 , A. Millin 2 1 Cardiff University, School of Engineering, Cardiff, United Kingdom ; 2 Velindre Cancer Centre, Medical Physics, Cardiff, United Kingdom ; 3 Cardiff University, School of Medicine, Cardiff, United Kingdom Purpose or Objective EdgeVcc is an automated planning methodology developed in Raystation (RaySearch Laboratories, Stockholm, Sweden) that is calibrated using multi-criteria optimisation via Pareto navigation (MCO) [1]. For a given treatment site, an operator will use MCO techniques to