Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size remains top normal . Mediastinal and hilar contours are similar . Pulmonary vasculature is not engorged . Moderate centrilobular emphysema is most pronounced within the right apex and lung base , as seen previously . Biapical scarring is also re - demonstrated . No focal consolidation , pleural effusion or pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Emphysema . No acute cardiopulmonary process .