恶性肿瘤是严重危害人类健康的疾病。在我国,癌症死亡自20世纪70年代以来呈持续增长的趋势,目前已居各类死因的第1位,肺癌、肝癌等已成为威胁中国人生命健康的头号敌人[1]。进入21世纪以来,正电子发射计算机体层摄影(PET)-CT因使肿瘤的诊断和治疗迈上了新台阶,越发引人注目,已 Malignant tumor is a serious disease of human health. In China, the death rate of cancer has been increasing continuously since the 1970s and ranks No.1 in all kinds of death causes. Lung cancer and liver cancer have become the number one enemy threatening the life and health of Chinese people. Since entering the 21st century, positron emission tomography (CT) - CT has made the diagnosis and treatment of tumors to a new level, attracting more and more attention.