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Other tests used to stage lung cancer at diagnosis include: 1  Magnetic Resonance Imaging (MRI). A type of imaging scan that uses magnetic fields to create clear images of body parts, including tissues, muscles, nerves and bones. 2  Positron Emission Tomography (PET). A type of imaging scan that is used to tell if lung cancer has spread to other parts of the body. Cells use sugar (glucose) for energy to function and cancer usually uses more than other cells or tissues. A special sugar solution is injected into the body through a vein.
Positron Emission Tomography and Computed Tomography (PET-CT) Scans. A PET scan may be combined with a CT scan at many cancer treatment centers. However, you may hear your doctor refer to this procedure just as a PET scan. A PET-CT scan is one way to find cancer and learn its stage.