Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear aside from minimal dependent atelectasis . There are no pleural effusions . No pneumothorax is seen . The heart size is within normal limits . The mediastinal contours are normal . Note is made of a large hiatal hernia , as before . There is air under both hemidiaphragms , consistent with pneumoperitoneum , not unexpected in a post-operative patient . Additionally , a small quantity of air seen within the mediastinum , also not unexpected post-operatively .
    OUTPUT:
    
1 . No acute cardiac or pulmonary process . 2 . Pneumomediastinum and pneumoperitoneum are not necessarily unexpected findings in a patient status post recent hiatal hernia repair .