Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison with chest radiograph from 1 day earlier , lateral component of the right pneumothorax is minimally improved with a persistent anterior component . There is no left pneumothorax . There is no focal consolidation or effusion . Bibasilar interstitial abnormalities are minimally improved . There is severe upper lobe predominant emphysema . Heart size is normal .
    OUTPUT:
    
Minimal interval improvement of right lateral pneumothorax compared to 1 day earlier .