Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild to moderate enlargement of the cardiac silhouette is present . Atherosclerotic calcifications are noted within the aortic arch . The mediastinal and hilar contours are within normal limits . Pulmonary vasculature is not engorged . Linear opacities in the lung bases likely reflect areas of scarring or atelectasis . No focal consolidation , pleural effusion or pneumothorax is present . No acute osseous abnormality is visualized .
    OUTPUT:
    
No acute cardiopulmonary abnormality .