Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is at the upper limits of normal size . Mediastinal and hilar contours are not significantly changed . The aortic arch is partly calcified . Bilateral calcified breast implants appear similar . The lungs appear clear . There are no pleural effusions or pneumothorax . Mild degenerative changes are similar along the thoracic spine .
    OUTPUT:
    
No evidence of acute disease .