^○NIshio Misako¹, Hidehumi Mimura¹, Shingo Hamaguchi¹, Jyunji Moriya¹, Kazuki Hashimoto¹, Shinji Wada², Nao Suzuki², Haruhiro Kondo², Soichiro Inoue³, Miki Sakamoto³ (1.Department of radiolody, St. marianna university school of medicine, Kawasaki, Japan, 2.Department of Obstetrics and Gynecology, St. Maranna University school of Medicine,Kawasaki ,Japan., 3.Department of Anesthesiology, St.Marianna university school of medicine , Kawasaki ,Japan.)

^○naotake tsuda¹, masamichi koganemaru², toshi abe², Kimio Ushijima¹ (1.The Obstetrics and Gynecologic department of Kurume University, school of medicine, 2.The department of Radiology Kurume University, school of medicine)

^○Saiko Sugiyama¹, Nobuyuki Kato² (1.The Department of Obstetrics and Gynecology, China-Nishi General Hospital, Social Medical Corporation Kioroshi Group, Chiba, Japan, 2.The Department of Radiology, China-Nishi General Hospital, Social Medical Corporation Kioroshi Group, Chiba, Japan)

^○Masamichi Koganemaru¹, Shuichi Tanoue¹, Asako Kuhara¹, Tomoko Kugiyama¹, Yasumoto Shinjyo¹, Norimitsu Tanaka¹, Naotake Tsuda², Kimio Ushijima², Toshi Abe¹ (1.Department of Radiology, Kurume University School of Medicine, Fukuoka, Japan, 2.Department of Obstetrics and Gynecology, Kurume University School of Medicine, Fukuoka, Japan)