Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperexpanded , with biapical hyperlucency , flattening of the diaphragms , and widening of the retrosternal clear space . Mild middle lobe and lingular atelectasis / scarring are unchanged . There is no focal consolidation . Heart size is normal . There are no pleural effusions or pneumothorax .
    OUTPUT:
    
COPD . No evidence of fluid overload .