正电子发射体层 (PET)是一种能够识别肿瘤内生化、生理变化的诊断影像技术 ,FDGPET可明显提高肿瘤诊断的准确性。肿瘤的FDG摄入量是与其内对葡萄糖需求量增加的有增殖能力的肿瘤细胞的代谢率呈正比的。FDGPET在肿瘤应用方面 ,对肿瘤的分期、分型 ,复发、转移的早期诊断 ,坏死与存活组织的鉴别 ,肿瘤生物特征的预测 ,及治疗反应的监测作用都得到了广泛承认。 Positron Emission Tomography (PET) is a diagnostic imaging technique that can identify biochemical and physiological changes in tumors. FDGPET can significantly improve the accuracy of tumor diagnosis. Tumor FDG uptake is directly proportional to the metabolic rate of proliferating tumor cells that have an increased glucose requirement. FDGPET has widely recognized the application of FDGPET in tumor staging, typing, early diagnosis of recurrence and metastasis, differentiation of necrotic and surviving tissue, prediction of tumor biological characteristics and monitoring of therapeutic response.