Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal and hilar contours appear within normal limits . The chest appears mildly hyperinflated . There is no pleural effusion or pneumothorax . The lungs appear clear . Bony structures are unremarkable , aside from minimal anterior osteophyte formation along the mid thoracic spine .
    OUTPUT:
    
Mild hyperinflation . No evidence of acute disease .