Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The mediastinal and hilar contours are remarkable for prominent right mediastinal convexity in the region of the ascending aorta , corresponding to dilation of the structure on CTA neck . The pulmonary vasculature is normal . Lungs are clear . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
Aneurysmal dilation of ascending aorta , better demonstrated on separately dictated CTA of the neck from the same date . No acute pulmonary disease . .