Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are within normal limits . The pulmonary vascularity is normal . The lungs are clear . No pleural effusion or pneumothorax is present . There are multilevel degenerative changes in the thoracic spine . Multiple old healed right - sided rib fractures are again noted . There is no free air under the diaphragms .
    OUTPUT:
    
No acute cardiopulmonary abnormality . No free air under the diaphragms .