Fetal radiation dose estimates for I-131 sodium iodide in cases where conception occurs after administration
- Oak Ridge Inst. for Science and Education, TN (United States)
After administration of I-131 to the female patient, the possibility of radiation exposure of the embryo/fetus exists if the patient becomes pregnant while radioiodine remains in the body. Fetal radiation dose estimates for such cases were calculated. Doses were calculated for various maternal thyroid uptakes and time intervals between administration and conception, including euthyroid and hyperthyroid cases. The maximum fetal dose calculating was about 9.8E-03 mGy/MBq, which occurred with 100% maternal thyroid uptake and a 1 week interval between administration and conception. Placental crossover of the small amount of radioiodine remaining 90 days after conception was also considered. Such crossover could result in an additional fetal dose of 9.8E-05 mGy/MBq and a maximum fetal thyroid self dose of 3.5E-04 mGy/MBq.
- Research Organization:
- Oak Ridge Associated Universities, TN (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- OSTI ID:
- 684489
- Report Number(s):
- ORISE--99-0164-Vol.1; CONF-960536--PROC.-Vol.1; ON: DE99002903
- Country of Publication:
- United States
- Language:
- English
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