Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison with the study of ___ , it is difficult to visualize the tip of the nasogastric tube , however it is seen on the abdominal series to be post pylorus . No pneumothorax .
    OUTPUT:
    
In comparison with the study of ___ , it is difficult to visualize the tip of the nasogastric tube , however it is seen on the abdominal series to be post pylorus . No pneumothorax .