Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Subdiaphragmatic gas is present on both sides . This was not present on the prior post - op chest film and might suggest the presence of a leak . Bibasilar infiltrates are present consistent with basilar pneumonia .
    OUTPUT:
    
Subdiaphragmatic air not present on prior chest x-ray . Probable bibasilar pneumonia .