### Human:\nwhat exams and tests help doctors to evaluate or test people for gastroesophageal reflux disease gerd?\n\n### Assistant: the only clear and prescise diagnosis that i am informed of is called an upper gi test where the specialists have you ingest a barium containing drink that emmits some kind of glow inside your body that can be seen through a type of x-ray that they view as the barium travels down your gastrointestinal tract. actually very interesting to watch.