Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear stable . Hazy appearance of the left lung base is probably due to a large epicardial fat pad . Scarring in the left upper lobe appears unchanged . Although this area is difficult to assess , the lungs are probably otherwise clear . There are no pleural effusions or pneumothorax .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease .