^○TAKESHI TAKATA¹, HIROSHI KONDO², MASAYOSHI YAMAMOTO², SHIGERU FURUI^1,2, KENSHIRO SHIRAISHI², TAKENORI KOBAYASHI¹, HIROSHI OBA², TAKAHIDE OKAMOTO^1,3, JUN'ICHI KOTOKU^1,3 (1.Graduate School of Medical Care and Technology, Teikyo University, Tokyo, Japan, 2.Department of Radiology, Teikyo University School of Medicine, Tokyo, Japan, 3.Central Radiology Division, Teikyo University Hospital, Tokyo, Japan)

^○YURI KON¹, Marie Takahashi³, Takeshi Miura⁴, Junichi Matsumoto², Hidefumi Mimura¹ (1.Department of radiology, St. Marianna University, Kawasaki, Kanagawa, Japan, 2.Department of emergency medicine, St. Marianna University, Kawasaki, Kanagawa, Japan, 3.Department of emergency medicine, Tokyo Medical and Dental University, Tokyo, Japan, 4.Diagnostic imaging and IVR department, Tokyo Woman's Medical University Yachiyo Medical Center)

^○KEIICHI NAGAI¹, MASASHI SHIMOHIRA¹, MISUGI URANO¹, KAZUYA OHHASHI², YUTA SHIBAMOTO¹ (1.Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan, 2.Department of Radiology, Nagoya City University Hospital, Nagoya, Japan)

^○TAKAHIKO MINE¹, SHOHEI MIZUSHIMA¹, TAKESHI KASHIMURA¹, SO UESHIMA¹, DAISUKE YASUI², TATSUO UEDA² (1.Department of Radiology, Nippon Medical School Chiba Hokusoh Hospital, 2.Department of Radiology, Nippon Medical School Hospital)