Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are unchanged , with the heart size within normal limits . The pulmonary vasculature is normal and the lungs are clear . No pleural effusion or pneumothorax is seen . There are moderate degenerative changes again noted in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality seen .