Although an occasional CT is not much radiation, a small amount of radioactive material in the body should be removed. So it is better to eat more kelp after doing CT, because there is also a substance called kelp gel in kelp, which can combine with radioactive substances after entering the body, thus allowing it to be discharged quickly from the intestines. In addition, you can eat more green vegetables, especially fresh green leafy vegetables, such as rape and bok choy. You can also eat more carrots, bean sprouts, tomatoes, lean meat, animal liver, etc., all have the effect of discharging radioactive substances. And then drink more green tea, green tea has a very good role in preventing radiation.