Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette is top - normal in size . There is calcification of the aortic knob . The hilar and mediastinal contours are otherwise within normal limits . Lungs are well expanded and clear . There is no focal consolidation , pleural effusion or pneumothorax . A metallic stent projects over the expected location of the right brachiocephalic vein and SVC .
    OUTPUT:
    
No acute cardiopulmonary process .