Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild unfolding of the thoracic aorta . The cardiac , mediastinal and hilar contours appear unchanged . There is no pleural effusion or pneumothorax . The lungs are hyperinflated . The lung fields appear clear . Moderate anterior osteophytes are noted along the mid to lower thoracic spine . Findings are similar to the prior examination .
    OUTPUT:
    
No evidence of acute disease .