Whether exposure to radiation was medical (x-rays, scans, etc.) or environmental, a simple warm bath with non-iodized salt can help detoxify the body. I would suggest using Celtic sea salt or Epsom salt which is magnesium salt.
Another optional bath is to combine equal amounts of both the salts and aluminum-free baking soda. For children use 1 cup of each the salt and soda in a full size tub per bath. For adults use about 1 to 3 lbs. per bath.
Children often times love to pour the salt into the water while the tub is filling up. This gives them a sense of excitement and the feeling of participation. And of course, the warm salty water is relaxing and helps them get ready for naps or bedtime.
Restorative baths should be limited to no more than one to two per week for children.