Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . The mediastinal and hilar contours are unremarkable aside from similar mild unfolding of the thoracic aorta . The heart is normal in size . The lungs appear clear . There are no pleural effusions or pneumothorax . Small osteophytes are similar along the mid - to - lower thoracic spine .
    OUTPUT:
    
No evidence of acute disease .