Novel dual-energy X-ray imaging detector

Abstract

The invention discloses a novel dual-energy X-ray imaging detector. The novel dual-energy X-ray imaging detector comprises a composite flicker body, wherein the composite flicker body is composed of two different sheet flicker bodies. One kind of flicker body is used for absorbing high-energy X-rays in a dual-energy X-ray and producing flickering light. The other kind of flicker body is used for absorbing low-energy X-rays in the dual-energy X-ray and producing flickering light. An optical module is located between the composite flicker body and an imaging sensor. The flicker light produced by the composite flicker body is enabled to form an image on the imaging sensor. The imaging sensor is used for detecting optical field distribution of the image formed on the light-sensitive surface of the imaging sensor and converting the image into a digital image. Three-dimensional spatial distribution information of flicker lighting points is obtained after arithmetic processing is carried out on the digital image. According to the novel dual-energy X-ray imaging detector, image formation of flicker light produced in a flicker body of a continuous structure is available, and the problems that high system complexity and low detection efficiency and the like caused by an independent flicker body array structure are solved.

Description

technical field [0001] The invention relates to the technical field of radiography, in particular to a novel dual-energy X-ray imaging detector. Background technique [0002] At present, dual-energy X-ray imaging systems can distinguish the density difference of materials transmitted by X-rays, and are widely used in non-destructive testing where internal materials need to be distinguished, such as bone density measurement, safety testing, container testing, etc. The working principle of the dual-energy X-ray imaging system is based on the physical law that the same substance has different mass absorption coefficients for different energy X-rays, and different substances have different mass absorption coefficients for the same energy X-rays. During the imaging process, the X-ray source produces two groups of rays with a high energy distribution and a low energy distribution. After the dual-energy X-ray passes through the measured substance, its ray intensity and energy spect...

AI Technical Summary

Problems solved by technology

However, due to the inevitable gap between the discrete scintillator unit arrays, the existing technical solutions increase the detection blind area of ​​the X-ray detector while suppressing the degradation of the spatial resolution, reducing the detection efficiency of the X-ray detector.

At the same time, the scintillator array structure composed of discrete units increases the complexity of system integration. Inconsistencies caused by differences in scintillator performance, crystal cutting, positioning, coupling and other factors in each discrete unit increase the manufacturing cost of the detector on the one hand. , on the other hand reduces the detection accuracy and stability of the detector

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