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 . There is no pleural effusion or pneumothorax . The lungs appear clear . Mild - to - moderate degenerative changes are noted along the mid - to - lower thoracic spine with mildly prominent marginal osteophytes including a prominent right lateral bridging osteophyte along the mid thoracic spine . The lower thoracic spine also shows mild rightward convex curvature .
    OUTPUT:
    
No evidence of acute disease .