Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No pulmonary edema . Slightly decreased left lung volume with slight elevation left hemidiaphragm suggestive of mild basilar atelectasis . Small bilateral pleural effusions , left worse than right . The cardiomediastinal and hilar contours are normal . Stable calcification of the aortic arch . There is air beneath the diaphragms bilaterally as expected status post abdominal surgery .
    OUTPUT:
    
No pulmonary edema . Bilateral small pleural effusions , left worse than right . Pneumo peritoneum as expected postoperatively .