2438278-A is referenced by 7 patents and cites 3 patents.

An energy spectrum modulation apparatus and a material discrimination method and device are disclosed which can discriminate the material in large- and medium-sized objects (7) such as cargo containers, air cargo containers, etc. by using X-rays having different energy levels. The energy spectrum modulation comprises a rotating disc carrying two filters which filter the radiation beam alternately. The beam energy is also varied cyclically respectively between two discrete levels by varying the acceleration voltage. The invention is thus able to obtain different images using different radiation spectra to distinguish or identify materials in objects being imaged.

Title
Energy spectrum modulation and image processing method
Application Number
GB20070007191 20070413
Publication Number
2438278 (A)
Application Date
April 13, 2007
Publication Date
November 21, 2007
Inventor
Chen Zhiqiang
CN
Liu Yinong
CN
Wang Xuewu
CN
Assignee
Nuctech
CN
Univ Tsinghua
CN
IPC
G01V 05/00
G01N 23/02
G01V 05/00
G01N 23/087
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