Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is at the upper limits of normal size . The mediastinal and hilar contours appear unchanged . The aortic arch is partly calcified . There is again a prominent epicardial fat pad about the apex of the heart . The lungs appear clear . There are no pleural effusions or pneumothorax . Mild degenerative changes along the mid - to - lower thoracic spine , including slight loss of superior endplate height along the mid thoracic vertebral body , appear unchanged .
    OUTPUT:
    
No evidence of acute disease .