Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size and mediastinal contours are within normal limits . There is atherosclerotic calcification of the aortic arch . Bilateral fibronodular apical scarring is slightly more prominent on the right . The lungs are clear . No evidence of pulmonary vascular congestion or pulmonary edema and no pleural effusion . Osseous structures show mild degenerative changes of the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .