Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Both lungs are well expanded with mild flattening of the bilateral hemidiaphragm and increased AP diameter of the chest consistent with chronic pulmonary disease . Bilateral prominent pulmonary arteries raise the concern for pulmonary artery hypertension . An ill - defined opacity is seen in posterior lower lung in the retrocardiac region overlying the lower spine and is concerning for pneumonia . This opacity is not very well defined on the frontal view except for a faint opacity in the right lower paracardiac region . A single pacemaker lead from left pectoral pacemaker device terminates into the right ventricle . Top normal heart size , mediastinal and hilar contours are unchanged since ___ . Mild atherosclerotic calcification of the aortic arch is stable .
    OUTPUT:
    
1 . Ill - defined opacity appreciated only on the lateral view in the posterior inferior lower lung overlying the spine shadow is concerning for pneumonia and since it is not clearly defined on the frontal view , it suggests lower lobe pneumonia either involving the right or left side . 2 . COPD . 3 . Pulmonary artery hypertension , unchanged since ___ . Findings were discussed with Dr . ___ on ___ at 5 :55 p .m .