4-[18F]Fluoroglutamine PET/CT in Imaging Patients With Newly Diagnosed Lung Cancer or Indeterminate Pulmonary Nodules

Inclusion Criteria: * Patients are given the opportunity to participate in the study if 1. Age between 18-79; 2. The patient must be able to give informed consent; 3. Sexually active subjects agree to use condoms and/or their partners of reproductive potential to use a method of effective birth control during imaging period of 2 weeks; 4. Patients can finish PET/CT scan without tranquilizers; 5. Patients with a newly diagnosed, untreated primary lung cancer; Or patients older than 55, current or former smoking with ≥ 30 pack years, and newly discovered indeterminate pulmonary nodules (7-30 mm diameter) on CT. 6. No chemotherapy, radiotherapy or immune/biologic therapy,or biopsy were allowed between the 18F-FDG and the 4-\[18F\]Fluoroglutamine PET/CT. Exclusion Criteria: * Patients with any of the following conditions will be excluded 1. Pregnant or lactating patients; 2. Patients with active lung infection; 3. Inability or refusal to have at least one peripheral intravenous line for intravenous access; 4. From assays obtained \<2 weeks prior to study enrollment（ULN：the upper limit of normal value ）:Bilirubin\>1.5\*ULN,AST/ALT \>2.5 \* ULN, Albumin\< 3 g/dl, GGT \> 2.5 x ULN if ALP\> 2.5 x ULN, Creatinine\>1.5\*ULN or creatinine clearance \<60ml/min； 5. Patients with a history of allergic reaction to this drugs or its analogues； 6. patients with poor compliance; 7. Acute major illness