稀土材料增感屏(简称“稀土屏”)是七十年代问世的高效增感屏,在临床应用中能提高影象的动态清晰度。但是,它的静态分辨率与中速钨酸钙屏有一定的差距。国内外有关科技人员正在对这一关键性的课题进行深入研究,以期有所突破而取代钨酸钙屏。一、分辨率的表示方法分辨率是表示增感屏能清晰反映被摄物体细微部分的最大能力。为了使它有可资对比的数字指标,一般习惯用每毫米能显示的平行线对数表示(一条线与一条宽度相等的间隔称为1线对)即:线对数/毫米(LP/m-m)。作者曾用不同直径的金属丝及不同厚 Rare Earth Material Sensitive screen (referred to as “rare earth screen”) is the seventy’s advent of efficient screen, in clinical applications can improve the dynamic image clarity. However, its static resolution and speed of calcium tungstate screen have a certain gap. Relevant scientific and technological personnel at home and abroad are in-depth study of this key issue, with a view to a breakthrough to replace the calcium tungstate screen. First, the resolution of the representation method Resolution is expressed by the sensitization screen can clearly reflect the subtle part of the subject’s maximum capacity. In order to make it comparable to the numerical indicators, the general habit of using per millimeter can show the number of pairs of parallel lines (one line with a width equal to the interval called 1 pair) namely: the number of pairs / mm (LP / mm ). The author used different diameter wire and different thickness