Practical Nuclear Medicine and Utility of Phantoms for Internal Dosimetry: XCAT Compared with Zubal

摘要: Purpose The absorbed doses for two radioisotopes, 99mTc and 131I, between previously validated Zubal phantom the recently developed XCAT were compared. Materials methods GATE Monte Carlo code was used to simulate statistical process of radiation. A with voxel matrix sizes similar a standard generated. According Medical International Radiation Dose formalism, specific fraction (SAF) values photons S-factors beta particles tabulated. amounts calculated compared in different organs. Results differences gamma radiation doses, SAFs, are >50% adrenal from adrenal, pancreas thyroid thyroid, lung kidney, kidneys lungs kidneys. bladder bladder, kidney liver thyroid. size distances organs phantoms. Denoted SAF correspond organ geometries Conclusion results phantoms different. variations prohibit easy comparison or interchangeability dosimetry these