 Health experts from around the world have gathered at the IAEA to discuss the use of radiation in medicine. They will review the implementation of action agreed in Bonn five years ago to strengthen radiation protection for patients and health workers. The International Conference on Radiation Protection in Medicine achieving change in practice is looking at the implementation of the Bonn call for action. How is this implementation going? What can be done better? What can we learn? And in the end we hope that this will strengthen the global implementation of radiation protection in medicine.