Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: This compared to the previous radiograph , there pleural air collection on the right . Has substantially decreased in extent . The pleural space is now mostly fused with air and 2 to 3 small air - fluid levels continue to be the present along the right lateral chest wall . The pleural drain on the right is in unchanged position . Unchanged normal appearance of the left lung , unchanged status post CABG an unchanged appearance of the cardiac silhouette .
    OUTPUT:
    
Decrease in extent of the right pleural area with filling of the pleural space with fluid . Right pleural drain is in unchanged position .