@inproceedings{oai:repo.qst.go.jp:00054451, author = {矢島, 佳央理 and Takase, Nobuhiro and Uesaka, Saki and Katayose, Tetsuro and Yamashita, Wataru and Narita, Katsuhisa and Kanai, Tatsuaki and 福村, 明史 and 水野, 秀之 and 矢島 佳央理 and 福村 明史 and 水野 秀之}, book = {Abstruct of 6th Japan-Korea Joint Meeting on Medical Physics and 11th Asica-Oceania Congress of Medical Physics}, issue = {Sup}, month = {Sep}, note = {In Japan for therapu-level dosimeter usere's dosimeters are calibrated in Therapy Level dosimeter Calibration Center , Association ffor Nuclear Technology in Medicine in terms of exposure dose for Co60 gamma-ray using ANTM secondary standard dosimeter. ANTM acts as a secondary standard dosimeter laboratry in Japan and has calibrated dosimeters all over Japan since 2004. According to the calibration frequency of facilities over 60% were calibrated within 1.15%. The exposure calibration factor differences of user dosimeter for 6 years by ANTM, the variation of these distributions was almost within our relative expanded uncertainty, 1.5%.}, publisher = {J}, title = {Calibration of Therapy-level dosimeter in Japan by ANTM}, volume = {31}, year = {2011} }