Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy . There are low lung volumes . Bilateral pleural effusions persists , slightly increased as compared to the prior study , with overlying atelectasis , underlying consolidation not excluded . There is no pneumothorax . The cardiac silhouette is partially obscured due to the bibasilar opacities / pleural effusions , however , is grossly stable in appearance .
    OUTPUT:
    
Low lung volumes with bibasilar pleural effusions , slightly increased , with overlying atelectasis , underlying consolidation can not be excluded .