Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild bibasilar atelectasis . No pleural effusion or pneumothorax seen . The cardiac silhouette is top normal . Mediastinal and hilar contours unremarkable . Evidence of old right rib fractures seen . No radiopaque foreign body / shrapnel seen .
    OUTPUT:
    
No radiopaque foreign body seen .