Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again seen is a large right hydropneumothorax without evidence of tension , mostly unchanged from the prior radiograph . There is slightly improved aeration of the right middle and lower lobes . The cardiomediastinal silhouette is normal . The left lung is clear .
    OUTPUT:
    
1 . Stable large right hydropneumothorax without tension . 2 . Improving aeration in the right middle and lower lobes .