Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The initial radiograph shows that the feeding tube has been advanced into the stomach . The lungs remain clear . There is no pneumothorax . The heart and mediastinum are within normal limits . The followup radiograph shows replacement of the feeding tube with a nasogastric tube , which courses below the hemidiaphragm , tip not visualized . The lungs remain clear . There is no other relevant change .
    OUTPUT:
    
NG tube courses below the hemidiaphragm , tip not visualized . Clear lungs with no evidence of pneumonia or aspiration .