^○Shoma Nagata, Hiroshi Kawada, Yukichi Tanahashi, Yoshifumi Noda, Nobuyuki Kawai, Tomohiro Ando, Hiroki Imada, Tetsuro Kaga, Masayuki Matsuo (Gifu University hospital, Department of Radiology)

^○Yasuyuki Ono, Shuji Kariya, Miyuki Nakatani, Yutaka Ueno, Takuji Maruyama, Atsushi Komemushi, Noboru Tanigawa (Department of Radiology, Kansai Medical University, Osaka, Japan)

^○Shohei Toyoda, Hideyuki Nishiofuku, Toshihiro Tanaka, Kenji Sato, Tetuya Masada, Shouta Tatumoto, Natuhiko Saitou, Bushi Matumoto, Yuuto Chanoki, Kimihiko Kichikawa (Nara Medical University, Department of Radiology and Nuclear Medicine, University of Nara, Japan)

^○Takeshi Miura¹, Munehiro Sugiyama¹, Hidetoshi Yamana¹, Tamami Namiki¹, Joe Toda² (1.Department of Diagnostic Imaging and Interventional Radiology, Tokyo Womens Medical University Yachiyo medical Center,Chiba, Japan, 2.Department of Diagnostic Radiology, Mitsui Memorial Hospital, Tokyo, Japan)

^○Gen Ishikawa¹, Kimisato Asano², Yasunori Taki³ (1.Department of obstetrics and Gynecology, Nippon Medical School Chiba Hokusoh Hospital, Chiba, Japan, 2.Artemis Women's Hospital, Tokyo, Japan, 3.Chofu Keijinkai Clinic, Tokyo, Japan)

^○Doan Khac Viet TRAN, Quang Thai Duong NGUYEN, Tan Duc VO (University Medical Center Ho Chi Minh City, VIETNAM)