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 . The chest is hyperinflated . Slight blunting along the left costophrenic angle suggests a trace effusion or perhaps minor scarring . There is no evidence for pleural effusion on the right . The lungs appear clear .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease .