For the fourth year in a row, more than 120 radiological and medical societies have joined the initiative, including more than 40 European, 20 North American, 13 Latin American, and 11 Asian national radiology societies, as well as five African societies representing 26 countries.

IDoR is organised each year by the European Society of Radiology, the American College of Radiology and the Radiological Society of North America. This year, the initiative is also supported by the European Society of Paediatric Radiology (ESPR), the Society for Pediatric Radiology (SPR) and the World Federation of Pediatric Imaging (WFPI). All three of these organisations have organised or actively participated in various IDoR activities to help stress the importance of radiology in the management of paediatric diseases.