Asthma is a condition in which your airways narrow and swell and produce extra mucus. This can make breathing difficult and trigger coughing, wheezing and shortness of breath.
Bronchitis is an inflammation of the lining of the bronchial tubes. These are the tubes that carry air to and from your lungs. People who have bronchitis often have a persistent cough that brings up thickened, discolored mucus.
A cough is your body’s way of responding when something irritates your throat or airways. An irritant stimulates nerves that send a message to your brain. The brain then tells muscles in your chest and abdomen to push air out of your lungs to force out the irritant.
CT lung screening is a noninvasive, painless procedure that uses low-dose X-rays to screen the lungs for cancer in just 30 seconds. A CT lung screening allows the radiologist to look at different levels, or slices, of the lungs using a rotating X-ray beam.