診断領域における増感紙-フィルム系の物理特性の計測と解析

概要

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We have measured the physical imaging properties, such as absolute speeds, modulation transfer functions (MTFs), and Wiener spectra of a large number of screens with calcium tungstate (blue system) and rare earth (green system) phosphor materials used in Japan. We also analyzed systematically the potential of clinical applications of the blue and green systems by taking into account the relationships regarding absolute speed, MTF, and Wiener spectrum. The results have showed that the blue screen systems generally have higher resolution properties than the green systems at the level of comparable speed. However, noise properties were improved by the use of green screen systems at the same speed. These measurement and analysis are very useful in facilitating the proper selection of screen-film system in diagnostic radiology.
社団法人日本放射線技術学会の論文
1992-11-01