Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest films were obtained with patient in upright position . Analysis is performed in direct comparison with the next preceding similar study of ___ . The heart size remains unchanged and is within normal limits . Rather prominent general dilatation and elongation of the thoracic aorta . Multiple focal wall calcifications most prominent in the aortic arch remain unchanged . No new contour abnormalities have developed . The pulmonary vasculature is not congested . There is no evidence of significant left atrial enlargement as can be judged on the lateral view . The on previous examination seen postoperative scar formations in the right lower lobe area have further regressed including the local thickenings of the pleura along the lower right lateral chest wall . There is no evidence of any pleural effusion accumulating in either lateral or posterior pleural sinuses . No pneumothorax is seen in the apical area on the frontal view . Comparison is extended to the preoperative PA and lateral chest examination of ___ . Comparison of cardiac structures and pulmonary vasculature does not indicate that the patient has developed significant CHF symptoms .
    OUTPUT:
    
Regression of postoperative scar formations after removal of small cell carcinoma . No evidence of new infiltrates . No signs of cardiac enlargement or pulmonary congestion . Rather marked general widening of thoracic aorta remains stable .