Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view portable chest x-ray in semi-erect position shows improvement of bilateral pulmonary edema now minimal if any . Bibasilar opacities are unchanged , likely due to minimal bibasilar atelectasis . Heart size is still mildly enlarged , aorta is elongated and calcified . Left pacemaker has two leads following the expected course and ending in the right atrium and right ventricle . Unchanged the right metallic stent projecting in the right lung apex and the multiple mediastinal clips and sternal wires in patient with previous cardiac surgery .
    OUTPUT:
    
Improvement of bilateral pulmonary edema .