Dose estimates from radon absorbed via skin and its progeny deposited on skin in radon therapy; Comparison with different exposure pathways

Sakoda, Akihiro   ; Ishimori, Yuu  ; Tschiersch, J.*

Some human studies have been made in radon-therapy facilities to measure the intake of radon via skin and the deposition of radon progeny onto skin. In the present study, with based on such empirical data, we addressed dose calculations for various organs and tissues due to these exposures. We have first developed mathematical models expressing the behavior of radon or its progeny in the body, and then optimized the values of parameters required. To compute dose coefficients, the activity of radon or its progeny in skin (and other organs and tissues) during and after the treatment was predicted with the optimized parameters. In the presentation, the results will be presented in detail and compared with other different pathways as inhalation that have ever been reported. The present work would contribute to one's understanding of radon exposure and its resulting doses from various viewpoints.