Figure 3: General didactic structure of “deceasing scaffolding in case-based sandwich technique”, as a 90-minute workshop, using the example of thoracic imaging of emergencies, (also see Tab. 3 and 4). The key teaching method is “case-based learning” (CBL) with “decreasing scaffolding” (progressing activity of learners with declining help of teachers) in a “sandwich technique” (interactive approach with changing activity level of learner and teacher). An important integrated element of learning psychology is Feedback by teachers and learners among a group. This is framed by Buzz groups at the beginning and end, with the objective of raising attention and sustainable dissemination of knowledge. The introduction is initially purely frontal and limited to a maximum of 20 minutes for reasons of learning psychology.