Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph is obtained . Midline sternotomy wires are noted . Free air is seen below the right hemidiaphragm . Mild left basilar atelectasis is noted . The cardiomediastinal silhouette is normal . No large effusion . Bony structures are intact .
    OUTPUT:
    
Free intraperitoneal air , as seen on outside hospital CT abd / pelvis from earlier today .