Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Chest tube remains overlying the right lower lung . The right apical pneumothorax has resolved . Multiple right posterior rib fractures are better visualized than on prior radiograph . Left basilar atelectasis is unchanged from prior . Unchanged cardiomediastinal silhouette .
    OUTPUT:
    
Resolution of right apical pneumothorax since 4 hours prior .