Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac , mediastinal and hilar contours are within normal limits . The pulmonary vasculature is normal . Lungs are clear without focal consolidation . No pleural effusion or pneumothorax is seen . Multilevel degenerative changes are noted in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .