[1] Yokohama City Univ, Dept Oncol, Grad Sch Med, Yokohama, Kanagawa, Japan
[2] Yokohama City Univ, Dept Radiat Oncol, Grad Sch Med, Yokohama, Kanagawa, Japan
[3] Yokohama City Univ, Dept Radiol, Grad Sch Med, Yokohama, Kanagawa, Japan
[4] Yokohama City Univ Med, Radiat Dept, Yokohama, Kanagawa, Japan
[5] Tohoku Univ, Grad Sch Med, Dept Diagnost Image Anal, Sendai, Miyagi, Japan
[6] Shonan Kamakura Gen Hosp, Adv Med Ctr, Kamakura, Kanagawa, Japan
[7] Kindai Univ, Dept Radiol, Fac Med, Osaka, Japan
[8] Japanese Soc Nucl Med, Tokyo, Japan