Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi supine chest film ___ at 12 :48 is submitted .
    OUTPUT:
    
Right internal jugular central line , endotracheal tube and nasogastric tube are unchanged in position . Lung volumes remain low and there has been interval appearance of mild pulmonary edema . An infectious process would be much less likely . Overall cardiac and mediastinal contours are essentially stable . No pneumothorax .