屏-片接触紧密程度与影像对比度关系的实验探讨  

An experimental investigation on the relation between the contact of screen-film and the contrast of X-ray

作　　者：王昌元[1] 李月卿[1] 孙向东 孙勇[1] 王军[3] 

机构地区：[1]泰山医学院放射系,山东泰安271000 [2]泰安市技术监督局,山东泰安271000 [3]济南铁路分局泰安铁路医院,山东泰安271000

出　　处：《泰山医学院学报》2000年第1期25-26,共2页Journal of Taishan Medical College

摘　　要：目的　通过实验 ,对医用暗盒中屏 片接触的紧密程度与X射线影像对比度关系进行探讨。方法　对金属矩形卡按不同的屏 片间隔进行X射线摄影 ,得到 6张X射线照片 ,在显微密度计上对这 6张金属矩形卡像进行扫描得到 6条X射线照片的光学密度曲线 ,根据这 6条曲线计算每张照片的对比度。结果　屏 片接触越紧密 ,光学对比度越大。结论　屏 片之间的紧密接触是保证X射线照片质量的重要因素之一。Objective: To study the relation between the contact of screen film and the contrast of X ray. Methods: 6 X ray films of a metalrectangular test card were obtained with different screen film interval, the contrast of films was calculated according to the curve of the films drawn by micro densitometer. Results: The tighter screen film contact, the higher contrast is. Conclusion: The films of high quality were obtained with small screen film interval.

关 键 词：屏-片接触 光学对比度 X射线屏-片系统 

分 类 号：R814.4[医药卫生—影像医学与核医学]