Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal and hilar contours appear stable . There is no definite pleural effusion or pneumothorax . The chest is hyperinflated . Blunting of the right costophrenic angle is unchanged and due to subpleural scarring rather than effusion .
    OUTPUT:
    
No evidence of acute disease .