Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a free intraperitoneal air seen below the diaphragm which appears increased from prior chest radiograph from ___ . Cardiomediastinal silhouette is unchanged . There is no pleural effusion or pneumothorax . There is no focal lung consolidation .
    OUTPUT:
    
Pneumoperitoneum which appears increased compared to prior chest radiographs . Unclear whether truly increased or due to differences in patient position . CT scan pending .