Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP portable view of the chest was obtained . There are slightly low lung volumes . Bibasilar atelectasis is seen . Relative opacity projecting over the costophrenic angles most likely relates to overlying soft tissue . No radiopaque foreign body is seen . Cardiac and mediastinal silhouettes are unremarkable .
    OUTPUT:
    
No radiopaque foreign body seen .