蛍光量計の計測開口角が散乱係数に与える影響 : モンテカルロ計算による

概要

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The effect of the aperture angle of a fluorescence meter on the scatter-to-primary ratio (SPR) was examined. The Monte Carlo program was developed and implemented to simulate an x-ray photon transport. We simulated a situation with divergent beam and x-ray spectra between 40 kV and 150 kV incident on water stabs. The dependence of SPR on tube potential, scatter thickness, and aperture angle was reported as energy-deposition in the phosphor layer. In addition, the average exit angle of scattered photons reaching the phosphor plane was scrutinized. Results indicated that the aperture angle of a fluorescence meter had an effect on SPR. Further, SPR was found to depend on the type of screen phosphor, whereas aperture angle made less difference.
公益社団法人日本放射線技術学会の論文
1999-05-20