Improvement in Radiographic Image Quality by Reduction in Scattered X-Rays: A New Concept in Improving Image Quality : Techniques, Instrumentations and Measurement

概要

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A new concept which has been successful in improving the radiographic image quality using high-speed screen-film (SF) systems is presented. It is shown theoretically and experimentally that the image contrast and sharpness in low frequency can be improved by the reduction in scattered X-rays without increasing the patient exposure. Two radiographic imaging systems with the same sensitivity: High-speed S-F systems combined with high-ratio antiscatter grids (the Low-Scatter Systems) and medium-speed S-F systems combined with low-ratio antiscatter grids (the High-Scatter Systems); were used in this study. The radiographic contrast of the Low-Scatter Systems can be increased by a factor of 1.3-1.6 and the response can also be increased in low frequency below 1 cycle/nm compared to the High-Scatter Systems. This new method has the advantage of having no use for special devices like the moving slit assembly.
社団法人応用物理学会の論文
1988-07-20