Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are provided . A lap band is partially imaged in the upper abdomen . There is bibasilar atelectasis . No definite signs of pneumonia , effusion , or pneumothorax . No free air below the right hemidiaphragm is seen . The cardiomediastinal silhouette is normal . Bony structures are intact .
    OUTPUT:
    
Mild bibasilar atelectasis . No signs of pneumoperitoneum .