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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Dose from radioactive seeds ： ウィキペディア英語版 Dose from radioactive seeds The calculation of radiation dose from radioactive seeds is crucial in the planning and administration of brachytherapy treatments. Most modern calculation are done using the formalism published by the American Association of Physicists in Medicine. For the geometry in figure 1, this formalism uses five parameters. *''Strength of the source'': How much radiation is being emitted by the seed, expressed as air kerma strength and denoted by $S\_k$. *''Dose rate of the source'': How much dose the seed will deliver to the reference point over a certain period of time, denoted by $\backslash Lambda$. *''Geometry factor'': How the shape of the seed will affect the dose at points away from the reference point, denoted by $G(r,\backslash theta)$. *''Anisotropy function'': How the much radiation will be stopped before passing out of the seed, denoted by $g(r)$. *''Radial dose function'': How the radiation will interact with the material surrounding the seed, denoted by $F(r,\backslash theta)$ The equation which links these parameters is, $D(r,\backslash theta)=S\_k\; \backslash Lambda\; \backslash fracg(r)F(r,\backslash theta)t$ ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Dose from radioactive seeds」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.