^○Sodai Hoshiai¹, Toshiyuki Irie^1,2, Kensaku Mori¹, Kuniaki Fukuda³, Kazunori Ishige³, Naoyuki Hasegawa³, Nobuyuki Takahashi⁴, Hirotaka Arai⁵, Kouichi Mori⁶, Takahiro Konishi⁷, Shunsuke Kikuchi¹, Yohei Takei¹, Miki Yoshida¹, Tomohiko Masumoto¹ (1.Department of Diagnostic and Interventional Radiology, University of Tsukuba, Tsukuba, Japan, 2.Department of Radiology, Mito Kyodo General Hospital, Mito, Japan, 3.Department of Gastroenterology, University of Tsukuba, Tsukuba, Japan, 4.Department of Radiology, Tsukuba Memorial Hospital, Tsukuba, Japan, 5.Department of Gastroenterology, Japanese Red Cross Maebashi Hospital, Maebashi, Japan, 6.Department of Radiology,Tsuchiura Kyodo General Hospital, Tsuchiura, Japan, 7.Department of Radiology, Tsukuba Medical Center Hospital, Tsukuba, Japan)

^○Wataru Kitatsuji^1,2, Hideyuki Nishiofuku², Toshihiro Tanaka², Takeshi Sato², Tetsuya Masada², Shota Tatsumoto², Natsuhiko Saito², Shohei Toyoda², Takeshi Matsumoto², Yuto Chanoki², Satoru Sueyoshi³, Hiroshi Sakaguchi⁴ (1.市立奈良病院　放射線科, 2.Department of Radiology and Nuclear Medicine, IVR center, Nara Medical University, Nara, Japan, 3.Department of Radiology, Nara Prefecture General Medical Center, Nara, Japan, 4.Department of Radiology, South Nara Medical Center, Nara, Japan)

^○Ayumi Takeuchi, Daisuke Uchida, Takahiro Kanai, Ryosuke Abe, Naruki Mizobuchi, Ai Ido, Norifumi Hosaka, Jiro Munechika, Noritaka Seino, Yoshimitsu Ohgiya (Department of Radiology, Showa University School of Medicine Tokyo, Japan)

^○Shuhei Miyamoto, Satomi Ide, Miyuki Maruno, Hiro Kiyosue (Oita University Faculty of Medicine, Oita, Japan)