Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . The heart is at the upper limits of normal size . The mediastinal and hilar contours appear within normal limits . The lungs appear clear . There is no pleural effusion or pneumothorax . Slight osteophyte formation is noted along the anterior margin of much of the thoracic spine . Surgical clips project over the upper spine .
    OUTPUT:
    
No evidence of acute disease .