Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac , mediastinal and hilar contours are normal . Bullous emphysematous changes are again seen at the upper lobes . Pulmonary vasculature is not engorged . No focal consolidation , pleural effusion or pneumothorax is present . Scarring within the right upper lobe is re - demonstrated with associated calcifications . No acute osseous abnormality is present .
    OUTPUT:
    
Bullous emphysema . No acute cardiopulmonary abnormality .