Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The mediastinal and hilar contours are normal . The lungs are clear . The pulmonary vascularity is normal . There are no pleural effusions or pneumothoraces . Mild degenerative changes are noted in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary process .