Department of Clinical Radiology;
Graduate School of Medical Sciences;
Kyushu University;
Fukuoka;
Japan;
Department of Radiology;
Kyushu University Hospital at Beppu;
Beppu;
Japan;
Kyushu International Heavy Ion Beam Therapy Center;
Tosu;
Saga;
Japan;
Prostate; Radiotherapy; Dosimetric; Comparison; 3DCRT; IMRT; VMAT;