Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The left pectoral pacemaker is again seen unchanged in position . Pacemaker leads are seen terminating adjacent to the right atrium and right ventricle . There is no evidence of lead fracture . A right subclavian vein stent is unchanged in position . Finally , sternotomy wires and mediastinal clips are unchanged . The heart is enlarged but unchanged in size from the prior study . The aorta is tortuous and diffusely calcified . Compared to prior , there are new diffuse alveolar opacities and septal thickening , suggestive of new mild pulmonary edema . Bibasilar opacities most likely reflect atelectasis or possibly chronic aspiration .
    OUTPUT:
    
Mild pulmonary edema with bibasilar opacities , which may represent atelectasis or chronic aspiration .