Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear unchanged . Area of scarring at the left lung apex appears unchanged . Elsewhere , the lungs appear clear aside from noting background emphysematous change . There is no pleural effusion or pneumothorax . Surgical clips are noted along the left axilla .
    OUTPUT:
    
No evidence of acute cardiopulmonary process .