Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post sternotomy . The heart is mild - to - moderately enlarged . The aortic arch is partly calcified . The cardiac , mediastinal and hilar contours appear unchanged . The lungs appear clear . There are no pleural effusions or pneumothorax . Mild - to - moderate osteophytes are noted along the visualized thoracolumbar spine .
    OUTPUT:
    
No evidence of acute disease .