^○Tomoko Shioiri¹, Tomokazu Sakano¹, Shobu Sakurada¹, Keishi Hirono¹, Tatsuya Kikuchi² (1.Department of Radiology,Yokohama City University Medical Center, 2.Department of Medical Safety,Yokohama City University Medical Center)

^○Yoshinori TAKAO, Akihiko KAKIMI, Shohei SASAKI, TAKAO ICHIDA (Osaka City University Hospital Department of Radiology)

^○takazumi akiyama¹, shinya mutsumi¹, sugimoto masaki¹, maehara kengo¹, kuzuwa takeshi¹, konishi yoshiyuki¹, anai hiroshi² (1.Medical Technology Department of Radiology,Nara City Hospital,Nara,Japan, 2.Research and Development Center for Interventional Radiology,Department of Radiology,Nara City Hospital,Nara,Japan)

^○SHUUICHI TOCHIHARA (Kumamoto University Hospital)

^○naomi kobayashi (teikyo Unibersity hospital of Tokyo.tokyo.Japan)