Table 1 Criteria for evaluating the efficacy of PET in solid tumors (2009)

Complete metabolic remission

Total loss of measurable lesion 18F-FDG uptake to below average liver radioactivity and indistinguishable from the surrounding blood pool background

Partial metabolic remission

Reduction of 18F-FDG uptake in the target lesion by ≥30 and an absolute reduction of ≥0.8

Metabolic stabilization of disease

Non-complete metabolic remission, partial metabolic remission, disease metabolic progression

Disease metabolic progression

Increased 18F-FDG uptake in target lesions ≥30 with an absolute increase of ≥0.8; or new lesions

Note: It is recommended to use lean weight-corrected standard uptake values to reduce the impact of patient weight changes on parameters during treatment