The clinical question to be answered is “what is causing my patient’s chronic cough”?

GERD and post-nasal drip are common causes.  COPD (emphysema and chronic bronchitis), pertussis, tumors, ACE inhibitors are others. By definition the chronic forms of these diseases do not show an “acute” consolidation.

Saying “no pneumothorax” is an impertinent negative. Pneumothorax is not a cause of chronic cough.

The impression “No acute cardiopulmonary disease” doesn’t address the clinical question. For example, lung cancer is not an acute cardiopulmonary disease.

Saying “No cardiopulmonary disease” is more comprehensive and more concise than “No acute cardiopulmonary disease”.

Better still, saying “Normal study. No findings to explain cough.” answers the question and lets the referring physician know the radiologist understood the purpose of the exam.