Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again there is a large right hydropneumothorax , which in comparison with prior exam is similar or just slightly improved . There is persistent collapse of the right lung . The chest tube is in unchanged position . The left lung is clear . The cardiomediastinal silhouette is normal .
    OUTPUT:
    
Similar or very slightly improved appearance of the large right hydropneumothorax with persistent collapse of the right lung .