This is a diagnostic study. Subjects were enrolled from clinical stage IIIB or IV NSCLC patients who received standard first-line chemotherapy combined with PD-1 monoclonal antibody immunotherapy and underwent 18F-FDG PET/CT imaging before treatment, after two lines of treatment and at the time of disease progression, while routine blood counts, liver and kidney function, inflammatory indices and other laboratory data were collected from subjects enrolled in the study. Based on standard 18F-FDG PET Ipercist and comprehensive laboratory indicators, subjects were evaluated for prediction of tumour biological characteristics and clinical staging, monitoring and evaluation of PD-1 immune efficacy, monitoring of tumour recurrence and restaging. At the same time, the systemic immune response and immune-related adverse events during the treatment process were evaluated to establish a better evaluation standard and system for the comprehensive evaluation of PD-1 immunotherapy.
