Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear unchanged . The right lateral chest wall demonstrates mild unchanged pleural thickening . Patchy left lower lung opacity suggests minor scarring or atelectasis that is also unchanged . There is no definite pleural effusion or pneumothorax .
    OUTPUT:
    
No evidence of acute disease . No significant change .