Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Pneumoperitoneum is confirmed and of unclear etiology . No pneumothorax or pneumomediastinum evident . Findings consistent with trapped lung again identified on the left with pleural thickening decreased intercoastal spaces . Multiple opacities in the left upper lobe , lingula and left lower lobe are stable . Decreased density projecting over the left lung may reflect improved inspiratory effort , decreased pulmonary edema .
    OUTPUT:
    
1 . Pneumopertoneum . This finding was discussed with ___ via telephone at 12 : 15 on ___ at the time of confirmation . 2 . Findings consistent with trapped lung again identified . Minimally decreased left lower lung opacification may reflect decreased atelectasis and possibly decreased pulmonary edema .