Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperexpanded with severe emphysema . Right pigtail pleural drain has been removed . There is no evidence of pneumothorax . Mild subcutaneous gas persists along the right chest wall . Heart size is normal . There is no pleural effusion . There are chronic interstitial abnormalities at the lung bases . There is mild gaseous distention of loops of small bowel in the upper abdomen .
    OUTPUT:
    
1 . No appreciable pneumothorax status post chest tube removal . 2 . Severe emphysema .