Normally, no special preparation is required. Jewelry and other items that may interfere with the pictures must be removed. In some cases, a person will be asked to take a laxative or have an enema to clean out the bowels before the test. Any woman who is or may be pregnant or is breastfeeding should tell the x-ray staff. This is because the gallium is radioactive and could harm an unborn or breastfeeding child.