Research on scatter impact between two cobalt-60 radiation sources in a dual-projection digital radiography system.

A gantry-moving dual-projection inspection system was successfully invented by Institute of Nuclear and new Energy Technology (INET), Tsinghua University. This system can provide two projected images from two different views at the same time. Comparing with traditional single-projection systems, a special feature of this system is that two cobalt-60 radiation sources are adopted, and there are two high-voltage gas ionization chamber arrays corresponding to the two sources, respectively. By examining the two images rather than one, more information can be trapped. However, there will be inter scatter effect between the two sources, which will decrease the image quality. This paper provides research of measurement and analysis on this issue, and provides effective solution to reduce inter scatter, and the result proves to be good. [ABSTRACT FROM AUTHOR]