This clinical trial studies positron emission tomography (PET) imaging utilizing 18F-(2S,4R)4-fluoroglutamine, a glutamic acid derivative, to image patients with Newly Diagnosed Lung Cancer or Indeterminate Pulmonary Nodules. [18F]Fluoroglutamine PET may provide additional information that help diagnose lung cancer.

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