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 . There is no pleural effusion or pneumothorax . A band - like opacity in the right mid lung suggests minor scarring that is unchanged . The lungs are otherwise clear . Bony structures are unremarkable .
    OUTPUT:
    
No evidence of acute disease .