Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are mildly hyperexpanded but clear . Heart size is normal . The mediastinal and hilar contours are normal . Minimal blunting of the posterior costophrenic sulci could reflect small pleural effusions similar to the prior study . There is no pneumothorax . Bridging anterior osteophytes likely reflect DISH . There are degenerative changes in bilateral acromioclavicular joints .
    OUTPUT:
    
No acute cardiopulmonary abnormality . COPD .