SP-0370 ESTRO RTTC guidance on COVID-19

Ignoranti quem portum petat, nullus suus ventus est.If a man does not know to what port he is steering, no wind is favourable to him.Seneca.Epistolae, LXXI., 3.There a several metrics that are commonly used for the assessment of contouring, such as the Dice Similarity Coefficient or Hausdorff distance.Their ubiquitous presence in the research perpetuates their use and acceptance as the measurements to make.But are these measures the most suitable?That surely depends on the port we are sailing for!In this talk, we will look at the common approaches to assessing contouring similarity.However, our consideration will framed by the purpose of the assessment: specifically how this relates to clinical use of contouring.What is the impact on the clinical workflow of generating the measurement?What do we want to know about the contours?Although the focus will be primarily on quantitative measures, the use of qualitative and dosimetric assessments will also be considered.