Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac , mediastinal and hilar contours are unchanged , with the heart size within normal limits . Pulmonary vasculature is normal . The hilar contours are unremarkable . Lungs are clear . No focal consolidation , pleural effusion or pneumothorax is seen . There are mild degenerative changes in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .