軟X線の線量測定について

概要

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The X-ray dosimetry has been established so far as in the conventional therapy. However, the standard of the high energy X-ray dosimetry and the low energy X-ray dosimetry has not been decided. Therefore, the problems of low energy X-ray dosimetry were investigated through the experiments. In this experiment, soft X-ray tube of mice window was used under 10kVp-25kVp. 1) In order to measure the air absorption which has influence on the soft X-ray range, the authors, first of all, calculated Al H.V.L. of each kVp, measured the change of X-ray quality and examined the degree of attenuation of the air based on the invers squeer low. 2) On the basis of the data mentioned above, the authors measured the length of the dosimeter ionizing part toward X-ray incident direction by using the extrapolation chamber manufactured for trial. 3) As for the measurement of the depth dose, the proper quantity of inonization volume of the chamber were calculated using the function of kVp and Phantom depth.
公益社団法人日本放射線技術学会の論文
1963-03-30