Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size measure at the upper limits of normal . Unfolding of the thoracic aorta . No airspace consolidation . No pulmonary edema . No pneumothorax . Pulmonary hyperinflation .
    OUTPUT:
    
No acute pleuropulmonary pathology . Pulmonary hyperinflation suggests COPD .