Fig. 1

Curriculum schedule and sample clinical contouring unit. A The IMRT 2.0 curriculum offered interprofessional sessions applicable to all (dark gray) and allowed participants to select either the physicist (red) or clinician (blue) tracks, yielding an expected total of 20 sessions per participant. B Educators were instructed to develop educational materials addressing common misconceptions and challenges with contouring for the selected disease site (in this case, head & neck). Educators delivered introductory interactive presentations with examples. Then, educators and session participants reviewed head & neck contours uploaded by participating centers together, allowing participants to learn from each other