Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The mediastinal and hilar contours are unchanged , with mild tortuosity of the descending aorta . Lungs are clear and the pulmonary vascularity is normal . There are no pleural effusions or pneumothorax . There are no acute osseous abnormalities .
    OUTPUT:
    
No acute cardiopulmonary abnormality .