Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and cardiac valve replacement . Low bilateral lung volumes . The size of the cardiac silhouette is markedly enlarged but unchanged . There is a small layering right pleural effusion with adjacent atelectasis . No focal consolidation or pneumothorax is identified .
    OUTPUT:
    
Small right pleural effusion with adjacent atelectasis .