Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right subpulmonic effusion has slightly decreased in the interim . Areas of atelectasis and scarring in the right mid and lower lung zones are stable . The left lung is clear . There is no pneumothorax . Cardiac silhouette is normal .
    OUTPUT:
    
1 . Slight improvement in the right subpulmonic pleural effusion . 2 . Postsurgical changes in the right lung without evidence of pneumonia .