PET Imaging With [18F]F-AraG in Advanced Non-small Cell Lung Cancer (NSCLC)

Single dose of 5 mCi+/- \[18F\]F-AraG IV injection followed by the PET/CT scan. A baseline \[18F\]F-AraG PET/CT will be performed at about 0-7 days before patient receives the first dose of PD-1/PD-L1 immunotherapy. A second \[18F\]F-AraG PET-CT will be performed at less than 14 days after the first dose of PD-1/PD-L1 immunotherapy is administered and before the second dose of PD-1/PD-L1 immunotherapy is given.