Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest demonstrate bibasilar atelectasis and small bilateral pleural effusions , slightly improved since the prior study . The lungs are hyperexpanded , consistent with COPD . No pneumothorax is present . Subtle lateral right base opacity may be due to atelectasis . The cardiomediastinal silhouette is stable .
    OUTPUT:
    
Bibasilar atelectasis and small bilateral pleural effusions again seen , are improved since the prior study .