Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal and hilar contours appear unchanged . The lungs are hyperinflated . The lungs appear clear . There are no pleural effusions or pneumothorax . Mild degenerative changes are noted along the thoracic spine . Mild rightward convex curvature centered along the lower thoracic spine . The bones are probably demineralized . There has been no significant change .
    OUTPUT:
    
No evidence of acute disease .