Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest views were obtained with patient in upright position . Analysis is performed in direct comparison with the next preceding similar study of ___ . The heart size remains within normal limits . The thoracic aorta is moderately widened and elongated as before . No local contour abnormalities are seen . A few semi-linear calcifications are seen in the wall at the level of the arch . The pulmonary vasculature is not congested . No signs of acute or chronic parenchymal infiltrates are present , and the lateral and posterior pleural sinuses are free .
    OUTPUT:
    
Mild degree of aortic widening in elderly gentleman , but no signs of cardiac enlargement , pulmonary congestion or acute infiltrates . Comparison with next previous study of ___ demonstrates stable normal chest findings .