Economic scale of utilization of radiation in medicine in Japan

Abstract Economic scale of radioisotopes (RI) in Japan is studied in the field of medicine, agriculture and a part of industry. (1) RI is used during medical examination with economic scale by 1.7M$ (million dollars) in 1997 and 0.4M$ in 2005. (2) Economic scale of RI utilization in agriculture is 4M$ for R&D, 127M$ for environmental protection and 1M$ for chronology. RI usage in agriculture is increased five times due to needs at environmental technology lasted after the Kyoto protocol. (3) Indirect economic scale of RI ( 85 Kr, 147 Pm, 90 Cr) usage in paper fabrication field in Japan for 2006 is 8432M$.