Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate bilateral pneumoperitoneum is likely postoperative in nature . There is bilateral linear atelectasis . The lungs are otherwise grossly clear . The heart and mediastinum are within normal limits . There is no pneumothorax .
    OUTPUT:
    
Moderate postoperative pneumomediastinum . Bilateral linear atelectasis with otherwise clear lungs .