Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate enlargement of the cardiac silhouette is stable . Aorta remains unfolded , with the ascending aorta demonstrating a prominent contour , compatible with dilatation as noted on prior CT . Pulmonary vascularity is not engorged . Scarring within the right mid and lower lung fields appears unchanged . The left lung demonstrates minimal atelectatic changes in the left lung base . Scarring within the lung apices is chronic . No large pleural effusion or pneumothorax is present . Lungs remain hyperinflated with evidence of emphysema . There is diffuse demineralization of the osseous structures , with mild loss of height of the L2 vertebral body which appears unchanged .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Chronic scarring within the right lung . Emphysema .