Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph was provided . There is no free air below the right hemidiaphragm . There is stable mild elevation of the right hemidiaphragm . No focal consolidation , effusion or pneumothorax seen . Cardiomediastinal silhouette is normal . Bony structures are intact .
    OUTPUT:
    
No signs of pneumoperitoneum .