Comparison of the Y-90 brachytherapy and Ir-192 brachytherapy of skin tumors: a simulation study

Abstract Skin brachytherapy is a successful practice for treating skin cancer patients. Although gamma source like an Iridium-192 (Ir-192) commonly used in the brachytherapy, use of beta Yttrium-90 (Y-90) has also been investigated this purpose. In current study, we simulated dose distribution proposed Y-90 applicator and Ir-192 Leipzig phantom, compared performance each methods three tumors hypothetical scenarios. Results simulation study showed that because sharp falloff radiation tissue, may lead to better protection bone and/or cartilage under thin tumors. However, it excessive surface if thick are treated. To choose between Y- 90 applicators, one need consider thickness tumor adipose layer bone.