Dual-energy radiation flat panel detector, preparation method and detection system

Abstract

The invention provides a dual-energy radiation flat panel detector, a preparation method and a detection system. The detector sequentially comprises a first scintillator layer, a photoelectric sensor array, a transparent substrate, a ray filtering layer and a second scintillator layer in the X-ray incident direction; and a photoelectric sensor array layer comprises first photosensitive pixels and second photosensitive pixels, the first photosensitive pixels and the second photosensitive pixels are distributed alternately, the first photosensitive pixels and the second photosensitive pixels have opposite photosensitive directions and are used for achieving low-energy X-ray imaging and high-energy X-ray imaging respectively, and the ray filtering layer is used for filtering low-energy X-rays and preventing the second scintillator layer from emitting light and scattering. According to the invention, the single-layer photoelectric sensor array is used for simultaneously acquiring low-energy and high-energy dual-energy-spectrum object images, and the ray filtering layer is used for filtering low-energy rays and preventing the second scintillator from emitting light and scattering, so that the material resolution capability of the detector is improved, the image quality is improved, and the diagnosis accuracy is improved. Besides, the structure is greatly simplified, the size can be greatly reduced, and the system cost can be reduced.

Description

technical field [0001] The invention relates to the technical field of X-ray detection, in particular to a dual-energy radiation flat panel detector, a preparation method and a detection system. Background technique [0002] Flat-panel digital X-ray detectors are usually used in medical radiation imaging, industrial inspection and security inspection and other fields. A complete radiation image chain mainly includes the following components: ray source, object to be measured, radiation detector, rack and back-end display system. Among them, the ray source and radiation detector are the two core components in the image chain, which play a vital role in the imaging quality, and also determine whether the imaging system can meet the needs of certain specific scenarios. For example, in the field of crystal structure analysis, it is necessary to use a monochromatic ray source, such as the ray produced by a synchrotron radiation source or the characteristic ray of a metal target,...

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Problems solved by technology

[0006] In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a dual-energy radiation flat panel detector and its preparation method, as well as a detection system, which are used to solve the problem that the dual-energy radiation detector in the prior art consists of two The composition of a set of detection systems increases the cost of the detector system, and there are problems such as complex structure and large volume that limit its application scenarios, and the alignment accuracy of the upper and lower sets of detectors will also have a great impact on data analysis. , misalignment often leads to measurement deviation, which in turn leads to problems such as degradation of imaging quality

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