Your CT finding is basically within normal limits apart from the atelectasis
, or scar which could mean nothing.
However it is important to provide some vital information starting with your age, smoking history, when do you cough most like morning, day or night, any family history of asthma, heart disease
and BLood pressure and your occupation.
You may have asthma or COPD, which again be assessed from history and lung function test or breathing test. Sometimes, angina also can give you a choking
feeling. Please provide more information to advise you correctly. Thanks.