Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The aorta is mildly tortuous . The mediastinal and hilar contours are unremarkable . The pulmonary vascularity is normal . No pleural effusion or pneumothorax is identified . There are mild multilevel degenerative changes in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .