増感紙-フイルム系における濃度のMTF

概要

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Screen-film system is generally used, in radiographic system. Sharpness of screen-film system is frequently measured by means of Modulation Transfer Function (MTF). But it is prospected for the reason of irradiation, that MTF is changed by film density. Therefore, we evaluted the relation of MTF with film density concerning screen-film system. And we intended to know the optimum density of x-ray picture. In the result of experiment, the higher film density, the poorer MTF is. Consequently, X-ray film MTF in low density is better than in high density. It was found that MTF is changed by film density. Therefore, MTF exist as function of density. Many line density function is developed by a line spread function. The study of the irradiation is a task affter this.
公益社団法人日本放射線技術学会の論文
1972-01-20