Determination of age specific 131I S-factor values for thyroid using anthropomorphic phantom in geant4 simulations

Radioiodine (131-I) treatment for Graves’ disease: Geant4 Monte Carlo simulation for patient personalized dose estimation

“…The difference in beta energies between the two systems can also be explained by the fact that in MIRD the thyroid tissue is simulated by water. In Geant4, the thyroid tissue is considered as given in NIST (National Institute of Standards and Technology), which is more precise (11,17) . In this study, a simple experiment was performed by modifying the density of the thyroid by the water in a single test.…”

“…Those results are aligned with the literature. Rahman et al showed that the energy deposited in a thyroid model in Geant4 is not homogenous in a comparison between large and small thyroids (17,20) . By comparing the average dose value along the XX' axis with the value found with 3 TLDs of the same size in the same axis, we find a difference of 3%.…”