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Two types of lung scans are usually done together: 1  Ventilation scan. During this scan, you inhale a radioactive tracer gas or mist. 2  Perfusion scan. During this scan, a radioactive tracer is injected into a vein in your arm.
The following tests and procedures may be used in the staging process: 1  CT scan (CAT scan): A procedure that makes a series of detailed pictures of the chest and abdomen, taken from different angles. 2  PET scan (positron emission tomography scan): A procedure to find malignant tumor cells in the body.