Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest views obtained with patient in upright position again demonstrate unremarkable mediastinal structures . The heart is not enlarged . Pulmonary vasculature is not congested . Somewhat irregular peripheral pulmonary vascular distribution and evidence of hyperinflation exists on the lung bases coinciding with low positioned and somewhat flattened diaphragms . Acute pulmonary abnormalities can not be identified . Comparison is made with the examination of ___ , findings are unchanged and no new parenchymal abnormalities are seen . Previously described mild wedge compression of the mid portion of the thoracic spine appears unchanged . The same holds for a previously described more than 1 cm separation in the right acromioclavicular joint area . It can be added that the patient had more recent chest examination of ___ at our___ , and the findings were also unchanged .
    OUTPUT:
    
Stable chest findings in patient with signs of COPD but no acute infiltrates .