Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is at the upper limits of normal size . Also , as seen previously , the aorta shows mild unfolding and fairly extensive calcification . The mediastinal and hilar contours appear unchanged . Mild subpleural thickening at each lung apex is unchanged . There is no pleural effusion or pneumothorax . Mild hyperinflation is suspected . The lungs appear clear . The bony structures are unremarkable , aside from slight degenerative changes . There has been no significant change .
    OUTPUT:
    
Mild hyperinflation . No evidence of acute disease .