^○TORU SAGUCHI¹, Jun Otaka¹, Shoichi Ikenaga¹, Natushiko Shirota¹, Daisuke Yunaiyama¹, Eri Arizono¹, Kazuhiro Saito¹, Yuki Takara², Tomonaga Moriya³, Yuichi Nagakawa⁴, Akihiko Tsuchida⁴, Ryosuke Tonozuka⁵, Takao Itoi⁵, Naokazu Chiba⁶, Shigeyuki Kawachi⁶ (1.Department of Radiology, Tokyo Medical University, Tokyo, Japan, 2.Tokyo Medical University Hachioji Medical Center, 3.Tokyo Medical University Ibaraki Medical Center, 4.Tokyo Medical University, Department of Gastrointestinal and Pediatric Surgery, 5.Tokyo Medical University, 6.Tokyo Medical University Hachioji Medical Center)

^○YUKICHI TANAHASHI, Satoshi Goshima, Hiroshi Kawada, Tomohiro Ando, Nobuyuki Kawai, Shoma Nagata, Tetsuro Kaga, Hiroki Imada, Yoshifumi Noda, Masayuki Matsuo (Department of Radiology, Gifu University Hospital, Gifu, Japan)

^○HIDEKI OTA¹, Tatsuo Nagasaka², Ryuichi Mori², Tomoyoshi Kimura², Yoshimori Kassai³, Sho Tanaka³, Atsuro Masuda¹, Kazumasa Seiji¹, Kei Takase¹ (1.Department of Diagnostic Radiology, Tohoku University Hospital, 2.Department of Clinical Radiology, Tohoku University Hospital, Sendai, Japan, 3.Canon Medical Systems corp., Tochigi, Japan)

^○SHOTA TATSUMOTO, TOSHIHIRO TANAKA, HIDEYUKI NISHIOFUKU, TAKESHI SATO, TETSUYA MASADA, NATSUHIKO SAITO, TATKESHI MATSUMOTO, YUTO CHANOKI, KIMIHIKO KICHIKAWA (Department of Radiology and IVR center, Nara Medical University, Kashihara, Japan)

^○YUTA KAWASHIMA¹, GAKU MATSUMOTO¹, FUMIAKI IWASE¹, JUNICHI INOUE¹, YOSHIBUMI MIYAZAKI¹, YOSUKE KAWANO¹, MASAHIKO YANAGISAWA¹, MASATSUGU SASAMOTO¹, KAZUKI HAGIWARA¹, KAORI ATOBE¹, HIROTO KASAI¹, KAORU HARADA¹, TAKASHI MATSUMOTO¹, SAYAKA MORI¹, TATSUHO KOBAYASHI² (1.Emergency and Critical Care Medical center, Yamanashi prefectural central hospital, Yamanashi, Japan, 2.Department of Emergency and Critical Care Medicine, Aidu Chou hospital, Fukushima, Japan)

HIDEKI ISHIMARU, ^○SATOMI YOSHIMI, SHUTO MIYAMURA, MASATAKA UETANI (Department of Radiology, Nagasaki University Hospital, Nagasaki, Japan)

^○HIDEAKI YAKUSHIJI¹, MASAHISA NAKAMURA², MOTOHIKO YAMADA¹, KOUJI AMANO¹, YUSUKE TSUNETOSHI¹, AKIHIRO USUI¹, HIROSHI YUKIMOTO², SATOSHI OKUBO², AKIHIRO KURIU², JUNITIROU YOKOTA¹ (1.Department of Emergency Surgery, Sakai City Medical Center, Osaka, Japan, 2.Department of Radiology, Sakai City Medical Center, Osaka, Japan)