Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable supine chest radiograph ___ at 06 : 18 is submitted .
    OUTPUT:
    
Endotracheal tube and left subclavian central line are unchanged in position . Nasogastric tube courses below the diaphragm with the tip not identified . Cardiac and mediastinal contours are stable status post median sternotomy for CABG . Interval appearance of mild interstitial edema . Layering bilateral effusions , left greater than right , with patchy bibasilar airspace opacities favoring atelectasis . No pneumothorax , although the sensitivity to detect pneumothorax is diminished given supine technique .