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 is within normal limits . No typical configurational abnormality is seen . Thoracic aorta mildly widened and elongated , but no local contour abnormalities or wall calcifications are identified . The pulmonary vasculature is not congested . No signs of acute or chronic parenchymal infiltrates are present . Similar as on the preceding examination , relatively low positioned diaphragms are noted , demonstrating some flattened appearance . This is unchanged and indicates presence of some COPD , but acute pulmonary infiltrates can be excluded . No pneumothorax has developed in the apical area .
    OUTPUT:
    
Stable chest findings , no evidence of new acute pulmonary disease .