[1] Osaka Metropolitan Univ, Grad Sch Med, Dept Diagnost & Intervent Radiol, 1-4-3 Asahi Machi,Abeno Ku, Osaka 5458585, Japan
[2] STORIA Law Off, Chuo Ku, Kobe, Hyogo, Japan
[3] Univ Tokyo, Dept Radiol, Bunkyo Ku, Tokyo, Japan
[4] Juntendo Univ, Dept Radiol, Grad Sch Med, Bunkyo Ku, Tokyo, Japan
[5] Kyoto Univ, Dept Diagnost Imaging & Nucl Med, Grad Sch Med, Sakyo Ku, Kyoto, Japan
[6] Nagoya Univ, Dept Radiol, Grad Sch Med, Nagoya, Aichi, Japan
[7] Okayama Univ, Fac Med Dent & Pharmaceut Sci, Dept Radiol, Kita Ku, Okayama, Japan
[8] Keio Univ, Dept Radiol, Sch Med, Shinjuku Ku, Tokyo, Japan
[9] Kumamoto Univ, Dept Diagnost Radiol, Grad Sch Med, Chuo Ku, Kumamoto, Japan
[10] Hokkaido Univ Hosp, Dept Diagnost & Intervent Radiol, Sapporo, Japan
[11] Hiroshima Univ, Dept Diagnost Radiol, Minami Ku, Hiroshima, Japan
[12] Osaka Univ, Dept Radiol, Grad Sch Med, Suita, Osaka, Japan
[13] Hokkaido Univ, Grad Sch Med, Dept Diagnost Imaging, Kita Ku, Sapporo, Hokkaido, Japan
[14] Shinshu Univ, Dept Radiol, Sch Med, Matsumoto, Nagano, Japan
[15] Tokyo Med & Dent Univ, Dept Diagnost Radiol, Bunkyo Ku, Tokyo, Japan