Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a large amount of free air under the hemidiaphragms which is increased compared to the other postoperative films . It is unclear if this is due to patient positioning or if there is a new bowel leak . There is bilateral lower lobe volume loss / infiltrate that is increased compared to prior . The NG tube tip is off the film , at least in the stomach
    OUTPUT:
    
Increased free air .