Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is within normal limits . The mediastinal contours demonstrate calcified atherosclerotic disease of the aortic knob , but no widening . The lungs are clear of consolidation . There is no large pleural effusion or pneumothorax . An old fracture is present at the distal left clavicle .
    OUTPUT:
    
No evidence of pneumonia .