ICRM 2016 is the 4th International Conference on Radiation Medicine (ICRM) organized by King Faisal Specialist Hospital & Research Centre (KFSH&RC) in collaboration with leading national and international organizations and professional societies. The previous conferences were successfully organized in 2010, 2012 and 2014. The last ICRM conference, ICRM2014, was conducted jointly with the Annual Meetings of both the Radiological Society of Saudi Arabia (RSSA) and the Saudi Society of Medical Radiological Technologists (SSMRT). These concerted and integrated organizations strengthen further the overall program for this major scientific event.