Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . The lungs are clear of focal consolidation , effusion , or pulmonary vascular congestion . Aortic valve replacement is again noted . There is a prominent contour of the ascending aorta and aortic arch . Cariomediatinal silhouette is otherwise unchanged . No acute osseous abnormality is identified .
    OUTPUT:
    
Prominence of the ascending aorta and aortic arch contour raising possibility of aneurysmal dilatation which can be assessed by CT . No acute cardiopulmonary process .