Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged . The aortic arch is calcified . The right upper mediastinum has a convex contour which is most commonly due to tortuosity of the great vessels . The lungs appear clear . There no pleural effusions or pneumothorax .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease .