Vega Carrillo, Héctor René; Manzanares Acuña, Eduardo; Hernández Dávila, Víctor Martín; Arcos Pichardo, Arelí; Baquero, Raquel; Iñiguez de la Torre, María Pilar
Resumen:
The use of 131I is widely used in diagnostic and treatment of patients. If the patient is
pregnant the 131I presence in the thyroid it becomes a source of constant exposition to other
organs and the fetus. In this study the absorbed dose in the uterus of a 3 months pregnant woman
with 131I in her thyroid gland has been calculated. The dose was determined using Monte Carlo
methods in which a detailed model of the woman has been developed. The dose was also
calculated using a simple procedure that was refined including the photons´ attenuation in the
woman organs and body. To verify these results an experiment was carried out using a neck
phantom with 131I. Comparing the results it was found that the simple calculation tend to
overestimate the absorbed dose, by doing the corrections due to body and organs photon
attenuation the dose is 0.14 times the Monte Carlo estimation.