Dosimetry of radon progeny deposited on skin in air and thermal water
| Autor: | Takahiro Kataoka, Hiroshi Tanaka, Yuu Ishimori, Norie Kanzaki, Fumihiro Mitsunobu, Kiyonori Yamaoka, Akihiro Sakoda |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
skin
Radon Daughters air Health Toxicology and Mutagenesis thermal water Thermal water chemistry.chemical_element Radon 030218 nuclear medicine & medical imaging alpha particle 03 medical and health sciences 0302 clinical medicine Orders of magnitude (radiation) Dosimetry Radiology Nuclear Medicine and imaging Fundamental Radiation Science Radiometry Radiation Human studies deposition velocity Temperature Water Dose-Response Relationship Radiation Radiation Exposure Skin dose Alpha Particles respiratory tract diseases radon progeny Deposition (aerosol physics) chemistry Radon Progeny 030220 oncology & carcinogenesis Environmental chemistry Environmental science AcademicSubjects/SCI00960 AcademicSubjects/MED00870 Epidermis |
| Zdroj: | Journal of Radiation Research |
| ISSN: | 1349-9157 0449-3060 |
| Popis: | It is held that the skin dose from radon progeny is not negligibly small and that introducing cancer is a possible consequence under normal circumstances as there are a number of uncertainties in terms of related parameters such as activity concentrations in air and water, target cells in skin, skin covering materials, and deposition velocities. An interesting proposal has emerged in that skin exposure to natural radon-rich thermal water as part of balneotherapy can produce an immune response to induce beneficial health effects. The goal of this study was to obtain generic dose coefficients with a focus on the radon progeny deposited on the skin in air or water in relation to risk or treatment assessments. We thus first estimated the skin deposition velocities of radon progeny in air and thermal water based on data from the latest human studies. Skin dosimetry was then performed under different assumptions regarding alpha-emitting source position and target cell (i.e. basal cells or Langerhans cells). Furthermore, the impact of the radon progeny deposition on effective doses from all exposure pathways relating to ‘radon exposure’ was assessed using various possible scenarios. It was found that in both exposure media, effective doses from radon progeny inhalation are one to four orders of magnitude higher than those from the other pathways. In addition, absorbed doses on the skin can be the highest among all pathways when the radon activity concentrations in water are two or more orders of magnitude higher than those in air. |
| Databáze: | OpenAIRE |
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