Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The aorta is tortuous . Mediastinal and hilar contours are otherwise unremarkable . The pulmonary vasculature is normal . Lungs are clear . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities . Moderate degenerative changes are noted in the thoracic spine with anterior osteophyte formation . No subdiaphragmatic free air is present .
    OUTPUT:
    
No acute cardiopulmonary abnormality .