Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Redemonstrated is moderate - to - large amount of free air in the peritoneal cavity , slightly increased compared to ___ . Lung volumes are low with mild secondary vascular congestion , but no pulmonary edema . Cardiac and mediastinal silhouettes are stable . There is no pneumothorax . A right PICC line ends at the mid-to - distal SVC .
    OUTPUT:
    
Pneumoperitoneum , increased since ___ .