Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Free air is again seen beneath the diaphragm . However , this appears decreased in amount compared with ___ . Oral contrast again noted in the visualized portion of the colonic splenic flexure . The G - tube itself is excluded from this film . The cardiomediastinal silhouette is unchanged . Upper zone redistribution is similar but the overall degree of vascular plethora may be very slightly decreased . Minimal atelectasis or scarring noted in the right mid zone laterally . No focal infiltrate or effusion identified .
    OUTPUT:
    
1 . Persistent free intra abdominal air , but decreased in volume compared with ___ . 2 . Upper zone redistribution , but degree of vascular plethora has also probably decreased . 3 . Otherwise , I doubt significant interval change .