Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal and hilar contours appear within normal limits . Nipple shadows are visible bilaterally . Elsewhere , the lungs fields appear clear . The chest is mildly hyperinflated . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No evidence of acute disease . Mild hyperinflation .