Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is top - normal with re - demonstration of prominent on in of the thoracic aortic arch corresponding to tortuous , dilated thoracic aorta on prior chest CTA . Hilar contours are unremarkable . Lungs are clear . Pleural surfaces are clear without effusion or pneumothorax .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Re - demonstration of dilated , tortuous thoracic aorta .