Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged . There is mild unfolding and calcification along the aorta . The right upper mediastinal contour demonstrates a converse contour , which is most frequently seen with tortuosity of the great vessels , but not specific . The lungs appear clear . There are no pleural effusions or pneumothorax . Mild - to - moderate degenerative changes are incompletely characterized along the mid thoracic spine .
    OUTPUT:
    
No evidence of acute disease . Convex contour to the right upper mediastinum , probably due to tortuosity of great vessels ; other etiologies such as lymphadenopathy are hard to excluded , however . If prior films are not available to show long - term stability of this appearance , then chest CT is suggested in follow - up to assess further .