thanks. I am having digestions problems( sometimes nausea after eating, bloating ,abdominal pain,belching, sometimes cosnstipation ,and abdominal distention). He ordered a gastric emtying test. I am afraid of the radioactive substance that I have to take .Is it to much radiation to my abdomen during the test? I do not want to take the risk. May I hace an explanation ?Is the tst necesary?