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Development of skeletal substitute materials

骨格等価材の開発

木名瀬 栄   ; 木村 雅哉*; 野口 宏

Kinase, Sakae; Kimura, Masaya*; Noguchi, Hiroshi

体外計測装置校正用ファントムの骨格等価材開発において、ベーシックデータ法に基づく、主材に対する添加材の最適量評価式を開発した。また、エポキシ樹脂を主材とした骨格等価材を開発した。開発したエポキシ樹脂材は、93mNbのKX線16.6keV及び241Amの$$gamma$$線59.5keVを用いて透過率を評価した。その結果、実測値は理論値とよく一致し、添加剤最適量評価式の妥当性が検証された。また、本研究で開発したエポキシ樹脂材はICRP Publ.23の骨格等価材として適切であることがわかった。

We have studied the formulation of skeletal substitutes for a in vivo calibration phantom using the basic data method. An equation for calculating the optimum relative mass of the corrective additives was developed. Also, epoxy resin based tissue substitutes simulating the skeleton were developed. The substitutes were examined for the photon transmissions using 16.6keV KX-rays from 93mNb and 59.5keV gamma rays from 241Am. It was found that the experimental transmission curves of the substitutes are in good agreement with the calculated ones. The equation for the corrective additive was validated. The skeletal substitutes were found to be suitable as the corresponding tissues defined in ICRP Publication.23.

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