Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Supine portable AP view of the chest was provided . Lung volumes are low . Clips are noted in the right upper quadrant . Bilateral lower lobe atelectasis likely accounts for low lung volumes . No effusion or pneumothorax . Heart size can not be assessed . Mediastinal contour appears prominent , though this can be due to supine portable technique . Bony structures are intact .
    OUTPUT:
    
Low lung volumes with bibasilar atelectasis . Please refer to subsequent CT for further details .