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 normal . No configurational abnormality is seen . Thoracic aorta of normal ___ but mildly elongated . 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 . No pneumothorax in the apical area . The diaphragms are somewhat low positioned and flattened , suggestive but not conclusive for COPD . Acute parenchymal infiltrates , however , are not present . In comparison with the previous study of ___ , the at that time suggested right lower lobe infiltrate and pleural effusion has disappeared .
    OUTPUT:
    
No evidence of acute pneumonia , low positioned and flattened diaphragms suggestive of some COPD .