Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The aorta is mildly tortuous . Hilar contours are normal , and the pulmonary vasculature is normal . Lungs are clear . No pleural effusion or pneumothorax is visualized . Moderate multilevel degenerative changes are seen in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .