Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: NG tube enters the stomach ; but tip is not clearly identified . Widespread parenchymal opacities seen in the prior study , likely representing pulmonary edema , are relatively unchanged . Tracheostomy tube and right subclavian central venous catheter are unchanged . No pneumothorax .
    OUTPUT:
    
NG appears to enter the stomach ; tip is not clearly identified .