Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided cardiac pacing device with dual leads following their expected courses to the right atrium and right ventricle . Lungs are clear . There is no focal consolidation , effusion or pneumothorax . There is no central vascular congestion or overt pulmonary edema . Enlargement of the right paratracheal stripe is stable and may reflect patient 's known thyromegaly . Cardiomediastinal silhouette is stable . There is mild unfolding of thoracic aorta with moderate calcification at the aortic knob .
    OUTPUT:
    
No evidence of pneumonia .