Are there long-term effects of colon radiation on my child's health?
Is your child receiving abdominal radiotherapy, perhaps for neuroblastom or wilm's tumor? Or, are you receiving external beam and wonder if it affects your child? If the former, there can be small intestine problems, but unlikely at dose used.
If it is your radiotherapy, you expose your child to no hazzard, and you do not bring any radiactivity out of the facility with you.