Energy spectrum modulator, method and apparatus for discriminating material and image processing method
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- TSINGHUA UNIV
- Publication Date
- 2007-11-21
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Abstract
Description
Technical field
[0001] The present invention relates to radiographic imaging inspection of large objects, in particular to an energy spectrum modulation device, a material identification method and equipment, and an image processing method, which can use radiation of different energy to identify materials in large and medium-sized objects such as shipping and air containers. material. technical background
[0002] Existing cargo inspection systems that use radiation imaging generally allow single-energy rays to interact with the inspected object, and then detect the rays that penetrate the inspected object to obtain an image. This system can reflect changes in the shape and mass thickness of the object to be inspected, but it cannot identify the material.
[0003] The dual-energy detection method to realize the distinction of object material properties was proposed a long time ago, such as US Patent US5,044,002, and has been widely used in various fields in the low-energy range, ...