Diagnosis
Your doctor will ask about your smoking history and listen to your lungs with a stethoscope. You may take tests, including:
Pulmonary function tests: This is a series of measurements of how much air your lungs can hold while breathing in and out.
Chest X-ray: Uses radiation to make a picture of your lungs to rule out heart failure or other illnesses that make it hard to breathe.
Computed tomography: This CT scan give a much more detailed look at your airways than a chest X-ray.