Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-erect chest radiograph since ___ a .m . is submitted .
    OUTPUT:
    
Interval placement of right subclavian central line which has its tip in the proximal right atrium . Pull - back by 4 cm would place the tip in the distal SVC . Left subclavian central line has its tip in the distal SVC near the cavoatrial junction . Nasogastric tube is seen coursing below the diaphragm with the tip not identified . Endotracheal tube continues to have its tip 3 cm above the carina . Lung volumes are diminished with patchy bibasilar opacities favoring atelectasis , although pneumonia can not be entirely excluded . No pneumothorax . Overall cardiac and mediastinal contours are unchanged . No pulmonary edema .