Cohen G, Wagner L K, McDaniel D L, Robinson L H
Radiology. 1984 Jul;152(1):187-93. doi: 10.1148/radiology.152.1.6729110.
Twenty-one screen-film systems were examined using contrast-detail-dose methods in order to determine which were most dose-efficient for use in pediatric radiography. With a given screen, dose efficiency in the noise-limited region (contrast approximately equal to 0.05) was more or less constant (within the range of experimental error) with changes in film speed. When screens with decreased phosphor thickness were used, dose efficiency deteriorated markedly. For a given speed of up to two times Par, rare-earth phosphors offered no advantage over calcium tungstate systems with regard to low-contrast dose efficiency; however, they did increase the speed of the system. Anti-crossover film proved to be an effective means of improving high-contrast detail while maintaining low-contrast dose efficiency.
使用对比细节剂量方法对21种屏-片系统进行了检查，以确定哪些系统在儿科放射摄影中最具剂量效率。对于给定的增感屏，在噪声受限区域（对比度约等于0.05），剂量效率随胶片速度的变化或多或少保持恒定（在实验误差范围内）。当使用磷光体厚度减小的增感屏时，剂量效率显著下降。对于高达两倍Par的给定速度，在低对比度剂量效率方面，稀土磷光体相对于钨酸钙系统没有优势；然而，它们确实提高了系统的速度。防交叉胶片被证明是在保持低对比度剂量效率的同时提高高对比度细节的有效手段。
