Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate stable top normal heart size . There is unfolding of the thoracic aorta with arch calcifications . The mediastinal and hilar contours are unremarkable . The lungs are clear . There is no pneumothorax , vascular congestion , or pleural effusion . A small inferior spur is noted in the right humeral head .
    OUTPUT:
    
No evidence of pneumonia .