Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: ___ cardiomediastinal and hilar contours are within normal limits . There is mild calcification of ___ aortic knob . There is no focal consolidation , pleural effusion or pneumothorax . Contrast is again seen within ___ biliary ducts , although less extensive than prior . Note is made of a biliary stent and a left nephrostomy catheter .
    OUTPUT:
    
No acute cardiopulmonary process .