If you re pregnant or think you might be, speak up. You may be told to skip the X ray. If you ve had an X ray of this part of your body before, old X rays can be compared with the new ones to determine change. If you have any metal in the part of your body being X rayed, say something. Metal items can block part of the image. Try to stay calm during the X ray process. If you move, you ll probably have to repeat the test.