用数字滤波技术测定滤线栅密度

Grid density test using digital filtration technique

本文介绍一种采用数字滤波技术，微机实时处理，实现滤线栅密度测试的新方法。实测结果表明。比现用的照像测试法客观准确，工作效率提高数十倍以上。

A new method for measuring the density of the anti-scatter grid using digital filtration technique was introduced in this paper. In the technique, a computer was applied to process all the data in real time. The practical results showed that this method is more objective and accurate than the X-ray projection measuring method, and further, the testing efficiency is enhanced tenfold.