Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is at the upper limits of normal size . There is mild unfolding of the thoracic aorta . The aorta is partly calcified along the arch . Slight subpleural scarring is noted at each lung apex . Otherwise , the lungs appear clear . There is mild hyperinflation with flattening of the hemidiaphragms and an expanded anteroposterior dimension to the chest . There is no pleural effusion or pneumothorax . Mild degenerative changes are noted along the thoracic spine where small anterior osteophytes can be seen . There is no free air .
    OUTPUT:
    
No evidence of acute disease . No evidence for free air .