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 within normal limits . The lungs appear clear . There are no pleural effusions or pneumothorax . There is mild hyperinflation suggested by flattening of hemidiaphragms . Bony structures are unremarkable . Cervical spine fusion is incompletely characterized .
    OUTPUT:
    
Hyperinflation . No evidence of acute disease .