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 normal , and no configurational abnormality is identified . Thoracic aorta unremarkable . The pulmonary vasculature is not congested . Similar as on the preceding examination of ___ , the diaphragms are somewhat low in position and slightly flattened , a finding which may indicate the presence of COPD . Acute parenchymal infiltrates , however , can not be seen . The lateral and posterior pleural sinuses are free , and no pneumothorax is present in the apical area on the frontal view .
    OUTPUT:
    
General chest findings compatible with some COPD but no evidence of acute infiltrates can be identified , and no cardiac enlargement or pulmonary congestion is seen .