IMPRESSION:
Compared to chest radiographs since , most recently  .
 
 Small right pleural effusion is distinctly smaller.  No pneumothorax. 
 Moderate right basal atelectasis unchanged.  Moderate left lower lobe
 atelectasis new since , unchanged since earlier in the day. 
 Normal postoperative cardiomediastinal silhouette.  Upper lungs clear.  No
 pulmonary edema.