Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable upright chest radiograph demonstrates no change in aeration accounting for differences in positioning . The patient remains intubated , with the tip of the endotracheal tube positioned 3 .5 cm from the level of the carina . An NG tube is in place with its tip projecting over the expected position of the stomach , and sidehole projecting over the expected position of the distal esophagus . There is mild pulmonary edema . Cardiac and mediastinal contours are unchanged .
    OUTPUT:
    
1 . Unchanged mild pulmonary edema . 2 . NG tube sidehole in the distal esophagus , could be advanced several centimeters to decrease the risk of aspiration .