Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are unchanged and within normal limits . The pulmonary vasculature is normal . Lungs are mildly hyperinflated but clear . No pleural effusion , focal consolidation or pneumothorax is present . Multilevel degenerative changes are noted in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .