Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The cardiac , mediastinal and hilar contours appear unchanged . Relative lucency in the upper lungs is consistent with emphysema . The chest is mildly hyperinflated . Streaky opacity in the lingula is most consistent with minor scarring or atelectasis . Otherwise , the lungs appear clear .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease .