Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate enlargement of the cardiac silhouette is re - demonstrated . The mediastinal and hilar contours appear unchanged with unchanged rightward shift of mediastinal structures compatible with right - sided volume loss . Linear opacities within the right lung base with right costophrenic angle blunting likely reflect areas of scarring . No new focal consolidation , pleural effusion or pneumothorax is present . Pulmonary vasculature is normal . No acute osseous abnormality is seen .
    OUTPUT:
    
Chronic scarring within the right lung base without acute cardiopulmonary process .