Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild to moderate enlargement of cardiac silhouette is noted . The aorta is tortuous and demonstrates calcification of the aortic knob . The pulmonary vascularity is normal , and the hilar structures are unremarkable . Lungs are clear without focal consolidation . No pleural effusion or pneumothorax is visualized . Minimal biapical scarring is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
No acute cardiopulmonary abnormality .