Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung fields are clear . There is no evidence focal consolidation , pleural effusion or pneumothorax . The heart is top normal in size . The aorta is tortuous with an undulating contour on the lateral view consistent with a history of thoracic aortic dissection status post aortic repair . The hilar and cardiomediastinal contours are unchanged from prior study .
    OUTPUT:
    
No acute cardiopulmonary abnormality .