[1] Fujieda Heisei Mem Hosp, Dept Radiol, Fujieda, Shizuoka, Japan
[2] Nagoya City Univ, Grad Sch Med Sci, Dept Radiol, Nagoya, Aichi, Japan
[3] Nanbu Tokushukai Hosp, Dept Radiat Oncol, Okinawa, Japan
[4] Okazaki City Hosp, Dept Radiol, Okazaki, Aichi, Japan
[5] Nagoya Proton Therapy Ctr, Nagoya, Aichi, Japan
[6] Nagoya Proton Therapy Ctr, Dept Proton Therapy, Nagoya, Aichi, Japan
[7] Kasugai Municipal Hosp, Dept Radiol, Kasugai, Aichi, Japan
[8] Fujieda Heisei Mem Hosp, Dept Urol, Fujieda, Shizuoka, Japan
[9] Fujieda Heisei Mem Hosp, Stereotaxis & Gamma Unit Ctr, Fujieda, Shizuoka, Japan