Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright view of the chest provided . There is no focal consolidation , effusion , or pneumothorax . The cardiomediastinal silhouette is normal . Imaged osseous structures are intact . Free air is seen below the diaphragms bilaterally . There is mild bibasilar atelectasis .
    OUTPUT:
    
Pneumoperitoneum . CT pending .