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 ___ . Again status post sternotomy and evidence of previous bypass surgery . The heart size is not enlarged and no configurational abnormality is identified . Thoracic aorta unremarkable in appearance . The pulmonary vasculature is not congested . The existing pulmonary vascular pattern with rather irregular distribution in the periphery and relatively low positioned diaphragms suggestive of COPD . In comparison with the previous study , there is now a parenchymal infiltrate on the right lung base occupying the lateral and posterior segment of the right lower lobe . This infiltrate has character of bronchopneumonia and was not present on the preceding examination of ___ .
    OUTPUT:
    
Right lower lobe pneumonia . Patient with general findings consistent with COPD . Followup examination after successful treatment is recommended .