Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac , mediastinal and hilar contours appears that unchanged . There is a stent along the course of the ascending aorta and arch . Abnormal aneurysmal dilatation along the distal arch appears radiographically stable . The lungs appear clear . There are no pleural effusions or pneumothorax . There has been no significant change .
    OUTPUT:
    
No significant change in abnormal aortic contour reflecting known aneurysm and the prior stent placement . No evidence of acute cardiopulmonary disease .