Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and aortic valve replacement . Compared with chest radiograph from yesterday , there has been interval improvement in the right pleural effusion , with stable appearance of left effusion . The cardial mediastinal silhouette is stable in appearance . Left retrocardiac opacity may be combination of effusion and atelectasis ; although , consolidation can not be excluded .
    OUTPUT:
    
1 . Interval decrease in size of right pleural effusion , with stable appearance of left pleural effusion . 2 . Left retrocardiac opacity may be combination of effusion and atelectasis ; although , consolidation can not be excluded .