Quantitative analysis: Stratified analysis of the global priority score according to participant profession. (a) Graph representing the 25 technical topics (listed in Tabs. 1–4) by priority scores: black bars: high priority; dark grey bars: intermediate priority; light grey bars: low priority technical topics; and white bars: low interest technical topics. (b) Graph representing the 25 technical topics by priority scores as analysed by the medical doctors. (c) Graph representing the 25 technical topics by priority scores as analysed by the medical physicist.