Positron emission tomography ( PET)/ computed tomography ( CT) inline scanner combined with high performance PET and CT have been introduced to clinical in recent years. The application of PET/ CT in oncology are rapid increasing. 最近几年,具有高性能PET和CT的同机PET/CT已投入临床,其在肿瘤学中的应用呈迅速增长之势。