Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The aorta is tortuous but unchanged . Mediastinal and hilar contours are otherwise stable . Pulmonary vascularity is normal . The lungs are clear . No pleural effusion or pneumothorax is seen . Biapical scarring is present . There are no acute osseous abnormalities .
    OUTPUT:
    
No acute cardiopulmonary abnormality .