Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperexpanded , with biapical hyperlucency and mild flattening of the hemidiaphragms . Persistent bibasilar atelectasis . The right lung is clear . No pleural effusion or pneumothorax . Heart size is top normal . Moderate calcification of the aortic arch .
    OUTPUT:
    
Unchanged bibasilar atelectasis .