Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are normally expanded and clear . Heart size is normal . The mediastinal and hilar contours are normal . There is no pleural effusion or pneumothorax . There are degenerative changes in bilateral acromioclavicular joints . There are hypertrophic degenerative changes in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .