The effect of detailing the trabecular structure of bone phantoms on the assessment of the bone marrow dose from 89,90Sr

Today there exist two main approaches to developing computational phantoms for bone dosimetry. The first approach is based on a detailed description of the microarchitecture spongiosa filling phantoms. This includes trabeculae and marrow separately, i.e., source tissue detector are separated. second involves generating homogeneous where target tissues combined. In both cases simulation results conversion factors that allow converting specific activity incorporated radionuclides into absorbed dose in marrow. For dosimetry Techa River population exposed due 89,90Sr, skeletal were created people different sex age, starting with newborn. These included trabecular microstructure, they belong approach. Also, skeleton fetus pregnant woman at various gestation stages have been developed, which modeling as medium. designed external internal exposure, including 89,90 Sr usage fundamentally pre- postnatal period raises issue compatibility these possibility their combining within single dosimetric system. Objective: evaluate effect detailing structure evaluation exposure Sr. Computational eight regions newborn’s filled generated. each region generated: one phantom microstructure modeled media. all phantoms, radiation transport from was simulated using MCNP 6.2 code, values calculated. As result, 16 obtained On average exceed those by 2.4 times. Such significant difference between makes it possible conclude has impact assessment