Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The aorta remains tortuous , and the mediastinal and hilar contours are otherwise unremarkable . The pulmonary vasculature is normal and the lungs are clear . No pleural effusion or pneumothorax is seen . Symmetric biapical scarring is re - demonstrated . There are mild degenerative changes in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary process .