Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest views were obtained with patient in upright position . The heart size is within normal limits . The thoracic aorta is mildly widened and elongated and shows calcium deposits in the wall mostly at the level of the arch . The pulmonary vasculature is not congested . Irregular peripheral vascular distribution in the lungs coinciding with relatively low positioned and somewhat flattened diaphragms is consistent with COPD . Acute new discrete parenchymal infiltrates can not be identified . The next preceding portable chest examination of ___ subtle patchy densities in the left base can not be identified to the same degree as before and thus have not developed into an acute infiltrate in this patient with chronic COPD . When comparison is extended to a more remote PA and lateral chest examination of ___ it can be noted that the patient at that time had bilateral pleural effusions which now have resolved .
    OUTPUT:
    
No new acute infiltrates , evidence of chronic COPD .