Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable upright chest radiograph ___ at 06 : 10 is submitted .
    OUTPUT:
    
Endotracheal tube , feeding tube and left internal jugular central line unchanged in position . The heart remains stably enlarged status post median sternotomy for CABG . There are bilateral layering effusions with bibasilar airspace opacities likely reflecting compressive atelectasis , although pneumonia can not be excluded . There has been interval appearance of mild perihilar edema . No pneumothorax .