Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-erect chest radiograph ___ at 11 :36 is submitted .
    OUTPUT:
    
Nasogastric tube is again seen coursing below the diaphragm with the tip not identified . The endotracheal tube is unchanged in position . There continue be patchy bibasilar opacities , slightly increased on the left , suggestive of atelectasis , although superimposed pneumonia can not be entirely excluded . No pulmonary edema . Overall cardiac and mediastinal contours are stable .