被写体の厚さ方向を含めたMTF : (3次元表示と体積)

概要

論文の詳細を見る
The sharpness of a radiograph is evaluated by the total MTF derived as a product of the two MTF curves for the screen-film system and the focal spot of the X-ray tube. Those two MTFs vary depending upon the magnification factor, therefore, total MTF change with the magnification factor. The MTF of such a total system is necessary to be expressed not only as a function of the spatial frequency but only as a combined function with the spatial frequency and the magnification factor or the distance between film and objective layer. In this paper, we express the three dimensional MTF as a function of the distance and calculated the area and volume of the three dimensional MTF. Morever, some radiographic systems in practical use are evaluated using the above methods.
公益社団法人日本放射線技術学会の論文
1984-05-01