Backscatter radiation at bone-titanium interface from high-energy X and gamma rays
作者： T.A. Mian , M.C. Van Putten , D.C. Kramer , R.F. Jacob , A.L. Boyer
DOI: 10.1016/0360-3016(87)90364-6
关键词: Percentage depth dose curve 、 Radiation therapy 、 Implant 、 Dosimetry 、 Radiation 、 Titanium 、 Medicine 、 Ionization 、 Nuclear medicine 、 Gamma ray
摘要: Occasionally head and neck cancer patients treated with high-energy X rays gamma have titanium metal dental implants in their maxillae or mandibles. The resulting effect of the bone-metal interface on radiation dose is interest. Ionization measurements for 60Co 6 MV 25 were made. A thin-window parallel-plate chamber was used to determine magnitude enhancement that due backscattered electrons from titanium. results showed there a 15% increase solid bone at entrance side For higher energy rays, about same slightly lower than 60Co. Monte Carlo calculations substantiated measurements. This fell off rapidly became negligible 1-2 mm interface. should be taken into account when planning therapy treatment implants.
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