Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate free intraperitoneal air under the hemidiaphragms , new from prior . The lungs are grossly clear . The cardiomediastinal and hilar contours are unchanged . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No evidence of pneumonia . Intraperitoneal free air may relate to known history of peritoneal dialysis , however , if there is suggestion of a more ominous source a abdomen and pelvic CT should be obtained .