X线照片的密度是影像形成的基础,也是保证X线照片质量的基本因素之一,密度的高低受多种因素影响。本文着重分析了自动洗片机冲洗套药效力变化对照片密度的影响,探讨如何利用电离室的补偿功能,使曝光量与药效的变化相匹配,实现最佳冲洗效果,保证X线照片密度的最小波动,提高X线照 X-ray density is the basis of image formation, but also to ensure the quality of X-ray one of the basic factors, the level of density by a variety of factors. This paper focuses on the analysis of the impact of changes in the efficacy of the automatic washing machine flushing sets of photos on the density of the film to explore how to use the compensation function of the ionization chamber to match the changes in exposure and efficacy to achieve the best washing results to ensure X-ray density The minimum fluctuation, improve X-ray