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 clear aside from a band - like opacity projecting along the left mid lung , suggesting minor atelectasis or scarring . Moderate anterior osteophytes are similar along the lower thoracic spine .
    OUTPUT:
    
No evidence of acute disease .