Can I breastfeed if I need a special X-ray or a radioactive test?
Many tests, including X-rays, ultrasound, mammograms, and MRIs, generally do not affect breastfeeding. Some of them use dyes that may be injected into a breastfeeding mother, but the baby’s bowel only absorbs a small amount of them. Some kinds of nuclear imaging require mothers to take radioactive chemicals called radioisotopes. With these, there is a potential risk of cancer or other problems when the baby is exposed to radiation. The amount of radioactivity in breast milk depends on several factors, including the type and amount of radioisotope used and the speed at which it decays.