^○SAYAKA SHIRAI¹, DAISUKE YASUI¹, TATSUO UEDA¹, FUMIE SUGIHARA¹, HIDEMASA SAITO¹, TADANOBU HAYAMA², TOMOAKI KAWAMOTO², SHINICHIRO KUMITA¹ (1.The Department of Radiology, Nippon Medical School, Tokyo, Japan, 2.The Department of Gastroenterology, Nippon Medical School, Tokyo, Japan)

^○HIROSHI KUWAMURA, Shigeyoshi Soga, Yosuke Suyama, Hiroki Yoshikawa, Yuki Hatanaka, Kosuke Okano, Yasuhiro Enjoji, Hiroshi Shinmoto (The Department of Radiology, National Defense Medical College, Saitama, Japan)

YOHEI MUNETOMO, RUI KANO, SYUNSUKE KISAKI, YASUAKI HASGAWA, JUN HASUMI, TAKAYUKI SUZUKI, ^○YOHEI OKI, YO MATSUI, HIROKAZU ASHIDA, HIROYA OJIRI (Department of Radiology, The Jikei University School of Medicine, Tokyo, Japan)

^○HIROTAKA KATO¹, NAOYA KINOTA¹, KYOHEI KUDO¹, NORIYUKI MIYAMOTO¹, RYO MORITA², YUKI YOSHINO² (1.Department of Diagnostic and Interventional Radiology, Obihiro Kosei general hospital, Hokkaido, Japan, 2.Department of Diagnostic and Interventional Radiology, Hokkaido university hospital, Hokkaido, Japan)

^○HIDEKI YASHIRO¹, Hideyuki Torikai², Manabu Misu¹, Manabu Hase², Wataru Fujishiro³, Masayuki Kamoshita³ (1.Department of Diagnostic Radiology, Hiratsuka City Hospital, Hiratsuka, Japan, 2.Department of Diagnostic Radiology, Keio University School of Medicine, Tokyo, Japan, 3.Department of Radiation Technology, Hiratsuka City Hospital, Hiratsuka, Japan)