【Introduction】
The Research Center is the institute that researchers beyond the framework of faculties or universities, work together to foster dissemination of international information on research results, while aiming at applying the research achievements to regulatory science such as radiation protection. At Hiroshima University, researchers for “Network Joint / Usage Research Center for Radiation Disaster Medical Science" in collaboration with research doctors in diagnostic radiology and radiation therapy, are engaged in research and development of medical radiology.