X-ray detection system and detection method

Abstract

The embodiment of the present invention discloses an X-ray detection system and a detection method. The detection system includes: a light source generator, a first detector, a second detector, a collimator and a processor; the first detector and the second detector are alternately arranged in the transmission direction of the object to be detected; the light source generator is used to emit multiple columns of light beam signals, each column of light beam signals includes multiple light beam signals; the first detector is used to receive multiple columns of transmitted light beam signals after passing through the object to be detected; the collimator is used to specifically select multiple columns of scattered light beam signals after passing through the object to be detected; the second detector is used to receive the scattered light beam signals selected by the collimator; the processor is used to determine the detection result of the object to be detected based on the multiple columns of transmitted light beam signals and the selected scattered light beam signals.

Description

Technical Field

[0001] The present invention relates to the field of X-ray detection, and in particular to an X-ray detection system and a detection method. Background Art

[0002] Accurately detecting contraband is the focus and difficulty of public security inspection. Traditional transmission imaging technology cannot provide molecular structure information and has limitations. X-ray diffraction (XRD) technology can provide structural information at the molecular level of substances and has strong specificity. Therefore, substances can be identified by detecting the diffraction spectrum of substances. The current XRD detection system generally includes: light source, detector and collimation system. Using this XRD technology to detect contraband can make up for the shortcomings of other traditional technologies and help improve the recognition accuracy.

[0003] However, current detection systems have problems such as low collection efficiency of scattered light beam signals. Summary of the invention

[0004] The embodiment of the present invention provides an X-ray detection system, which can improve the collection efficiency of scattered light beam signals, thereby improving the detection efficiency of the detection system.

[0005] According to a first aspect of an embodiment of the present invention, there is provided an X-ray detection system, the detection system comprising:

[0006] A light source generator, a first detector, a second detector, a collimation device, and a processor;

[0007] The first detector and the second detector are arranged alternately in the transmission direction of the object to be detected;

[0008] The light source generator is used to emit multiple columns of light beam signals, each column of light beam signals includes multiple light beam signals;

[0009] The first detector is used to receive a plurality of transmission light beam signals after passing through the object to be detected;

[0010] The collimating device is used to specifically select multiple columns of scattered light beam signals after passing through the object to be detected;

[0011] The second detector is used to receive the scattered light beam signal selected by the collimation device;

[0012] The processor is used to determine the detection result of the object to be detected based on the multiple columns of transmitted light beam signals and the selected scattered light beam signals.

[0013] According to another aspect of an embodiment of the present invention, there is provided a method for detecting an X-ray, the method comprising:

[0014] The light source generator emits a plurality of beam signals, each beam signal comprising a plurality of beam signals;

[0015] The first detector receives a plurality of transmission light beam signals after passing through the object to be detected;

[0016] The collimating device specifically selects the multiple columns of scattered light beam signals after passing through the object to be detected;

[0017] The second detector receives the scattered light beam signal selected by the collimation device;

[0018] The detection result of the object to be detected is determined according to the multiple columns of transmitted light beam signals and the selected scattered light beam signals.

[0019] According to the detection system and detection method in the embodiments of the present invention, since multiple columns of light beam signals are used and the first detector and the second detector are alternately arranged in the transmission direction of the object to be detected, the number of photons in the scattered light beam signal collected per unit time is greatly increased, that is, the collection efficiency of the scattered light beam signal is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the following briefly introduces the drawings required for use in the embodiment of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 is a schematic diagram showing the architecture of an X-ray detection system according to an embodiment of the present invention;

[0022] Figure 2 is a schematic diagram showing a plane of incident points of a light beam signal of a light source generator according to an embodiment of the present invention;

[0023] Figure 3 is a schematic diagram showing the arrangement of the first detector and the second detector in an embodiment of the present invention;

[0024] Figure 4 is a schematic diagram showing a scattered light beam signal in an embodiment of the present invention;

[0025] Figure 5 is a schematic diagram showing the position of an object to be detected in an embodiment of the present invention;

[0026] Figure 6 It is a schematic diagram showing the flow of the detection method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0027] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and Examples. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are not configured to limit the present invention. For those skilled in the art, the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0029] There are many kinds of detection systems at present, which generally include: light source generator, detector and collimation system. In the selection of light source generator, generally use X-rays generated by electron beam target hitting bremsstrahlung, that is, to generate X-ray energy spectrum with wide energy distribution. In the selection of detector, photon counting detector or energy integrating detector can be used, among which photon counting detector can distinguish the energy of photons, while energy integrating detector cannot distinguish the energy of photons. Since the spectrum of X-ray diffraction needs to be detected, the corresponding detector needs to be matched. Energy integrating detector must filter the light source generator in the X-ray energy dimension, while photon counting detector does not need to limit the X-ray light source generator. Since the physical process of scattering is distributed smoothly in space, it is easy to have different reconstructed pixel information aliasing in the same detector pixel. In order to be able to solve, a collimation device is added, which can filter out unnecessary signals, reduce aliasing and improve the stability of solution. The commonly used collimation devices now mainly include long straight collimators and encoding plates. Long straight collimators constrain X-rays in two dimensions, and encoding plates constrain X-rays in one dimension.

[0030] However, although the current detection system can detect the diffraction information of a certain pixel point, its imaging time is too long and cannot be applied in practice. In addition, although the use of only photon counting detectors improves the collection efficiency of scattered beam signals, there are still problems such as long scanning time and impractical application. Although the use of energy integrating detectors and encoding plates improves the flux of scattered beam signals, it requires filtering of the light source generator in the energy dimension, which reduces the efficiency of photon use.

[0031] The embodiments of the present invention are improvements made based on the above-mentioned problems.

[0032] In order to better understand the present invention, the detection system and detection method according to the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that these embodiments are not intended to limit the scope of the present invention.

[0033] Figure 1 FIG. 4 is a schematic diagram showing the architecture of an X-ray detection system according to an embodiment of the present invention.

[0034] like Figure 1 As shown, the X-ray detection system 100 in this embodiment includes: a light source generator 110, a first detector 120, a second detector 130, a collimation device 140 and a processor 150.

[0035] The first detectors 120 and the second detectors 130 are arranged alternately in the transmission direction of the object 160 to be detected.

[0036] The light source generator 110 is used to emit multiple columns of light beam signals, each column of light beam signals includes multiple light beam signals.

[0037] The first detector 120 is used to receive a plurality of transmission light beam signals after passing through the object to be detected 160 .

[0038] The collimating device 140 is used to specifically select multiple columns of scattered light beam signals after passing through the object to be detected 160.

[0039] The second detector 130 is used to receive the scattered light beam signal selected by the collimating device 140 .

[0040] The processor 150 is used to determine the detection result of the object to be detected 160 according to the multiple columns of transmitted light beam signals and the selected scattered light beam signals.

[0041] from Figure 1It can be seen that the light beam signal emission direction of the light source generator 110 is the positive direction of the X-axis of the three-dimensional Cartesian coordinate system, and the transmission direction of the object to be detected 160 is the Y-axis of the three-dimensional Cartesian coordinate system. The light source generator 110 generates multiple columns of light beam signals, which will pass through the object to be detected 160, and then the transmitted light beam signal will be received by the first detector 120, while the scattered light beam signal will first be specifically selected by the collimating device 140, and the selected scattered light beam signal will be received by the second detector 130. The processor 150 processes the transmitted light beam signal and the scattered light beam signal to determine the detection result of the object to be detected.

[0042] Through the embodiment of the present invention, due to the use of multiple columns of light beam signals, and the alternating arrangement of the first detector 120 and the second detector 130 in the transmission direction of the object to be detected 160, the number of photons in the scattered light beam signal collected per unit time is greatly increased, that is, the collection efficiency of the scattered light beam signal is improved.

[0043] Figure 2 It is a schematic diagram showing the incident point plane of the light beam signal of the light source generator according to an embodiment of the present invention.

[0044] In one embodiment, the incident plane of the multiple-column light beam signals is a YOZ plane, and the incident points on the YOZ plane are distributed in two-dimensional discrete manner. Specifically, the incident points of the multiple-column light beam signals are arranged at equal intervals on the Z axis of the three-dimensional Cartesian coordinate system, and are distributed at equal intervals or at unequal intervals on the Y axis. Specifically, the straight line formed by the incident points of the column light beam signals is parallel to the Z axis.

[0045] It is important to understand that Figure 2 As shown, the light beam signal is incident along the X-axis, and in the YOZ plane, the incident points are distributed in two-dimensional discrete distribution. The straight line formed by the incident points of the column light beam signal is parallel to the Z-axis, and the incident points in the Z-axis direction are arranged at equal intervals. The incident points in the Y-axis direction can be distributed at equal intervals or at unequal intervals. If the distribution is equidistant in the Y direction, the received scattered light beam signal can be used for periodic detection. If the distribution is unequally spaced in the Y direction, it can be ensured that when the object 160 to be detected is moving, the second detector 130 can reuse the scattered light beam signal received before. Therefore, the detection system in the embodiment of the present invention not only improves the receiving efficiency of the scattered light beam signal, but also ensures the accurate solution of the object 160 to be detected.

[0046] In one embodiment, the spacing is a distance determined by a transmission speed of the object to be detected, an exposure time of the first detector, and an exposure time of the second detector.

[0047] It can be understood that, assuming that the spatial sampling interval of the scattered light beam signal of the object to be detected is (p, Q, r), which corresponds to discrete distances in three directions (X, Y, Z), respectively.

[0048] The formula of Q is as follows (1):

[0049] Q=v×T (1)

[0050] Wherein, v is the transmission speed of the object to be detected, and T is the exposure time of the first detector 120 and the exposure time of the second detector 130.

[0051] It should be noted that the spacing between different column beam signals in the Y-axis direction is L, which is an integer multiple of Q. In the case of equal spacing in the Y-axis direction, the discrete spacing of the objects to be detected in the Y-axis direction is Q, and the sampling interval L satisfies the following relationship:

[0052] L=k×Q (2)

[0053] Where k is an integer. When k is a fixed value, the arrangement of the light beam signal is an evenly spaced periodic distribution along the moving direction of the object to be detected 150. In the evenly spaced periodic distribution, the light beam signal detected by the first detector 120 and the second detector 130 each time will detect the same light beam signal after k exposures. Therefore, the light beam signals of the same reconstructed pixel point can be summed to improve the reception efficiency of the scattered light beam signal and reduce noise, thereby realizing the multiplexing of the light beam signal.

[0054] When k is not a fixed value, that is, the intervals between column beam signals are not equal, the beam signals received by the first detector 120 and the second detector 130 at different times can form a set of linear equations. The continuity constraint conditions can be added to solve the set of equations, and the beam signals can also be reused.

[0055] The solution formula used in the embodiment of the present invention is as follows.

[0056] The attenuation law of X-rays can be described by Beer's law:

[0057] I(E)=I0(E)exp(∫-μ(E,x)dx) (3)

[0058] Where E is the photon energy, I0(E) is the incident energy spectrum, and I(E) is the transmitted energy spectrum.

[0059]

[0060] Among them, I L (E) is the low energy equivalent energy spectrum, I H (E) is the high energy equivalent energy spectrum, p L With p H They are low energy detection signal and high energy detection signal respectively.

[0061] The scattered beam signal of X-rays can be described as:

[0062] I(E,θ)=CI0(E)T(E)f xrd (E,θ) (5)

[0063] Where C is a constant factor and T(E) is the attenuation term of the substance to be detected, which is specifically expressed as follows:

[0064] T(E)=exp(∫-μ(E,x)dx) (6)

[0065] The beam signal detected by the second detector 130 is the sum of multiple scattered beam signals, which can be written as follows after being discretized:

[0066]

[0067] Among them, Y represents the pixel coordinate of the second detector 130, s(E, Y) represents the detection energy spectrum of the second detector 130, Ω represents the set of all scattered light beam signals that can hit pixel Y, and A(X, Y) represents the influence of the encoding plate on the scattered light beam signal.

[0068] In the subsequent processing, the attenuation term T(E) of the material to be detected is calculated according to the relevant technology of the first detector 120, and the incident energy spectrum I0(E) of the light beam signal can be obtained by software simulation. Therefore, after correcting the attenuation term T(E) and the incident energy spectrum I0(E), the following formula (8) can be obtained:

[0069]

[0070] Among them, S(q, y) represents the corrected scattering spectrum, and q is the vector of the scattered beam signal, which is the core variable of the coherent scattered beam signal:

[0071]

[0072] Where E is energy, c is the speed of light, and h is the wavelength. Formula (8) is the physical model and solution core of the scattering field. The physical model is a linear superposition model. Therefore, it can be solved using ART and other solution algorithms.

[0073] Among them, A(X, Y) affects the stability of the solution of the equation, and S(q, Y) is closely related to the noise level of the equation. The purpose of the embodiment of the present invention is to improve the receiving rate S(q, Y) of the scattered light beam signal while ensuring the stability of the solution.

[0074] For example, when the first row is detected using the first second detector 130:

[0075]

[0076]

[0077] Among them, S 1，1 It represents the first detection of the second detector 130 in the first row, the first subscript represents the row number of the second detector 130, and the second subscript represents the number of detections. k represents the scattered beam signal of the kth row. Since the arrangement is periodic, it satisfies

[0078] S 1，1 (q, Y) = S 2，k+1 (q, Y) = S 3，2k+1 (q, Y) = ... (11)

[0079] The same detection signals as above are accumulated to increase the counting rate.

[0080] When k is not a fixed value, that is, the intervals between the columns of light sources are not equal, the beam signals detected at different times can form a linear equation group, and the continuity constraint conditions can be added to solve the equation group, which can also achieve the reuse of beam signals. For example:

[0081]

[0082]

[0083]

[0084] Although the above equations cannot be superimposed for denoising, the purpose of multiplexing beam signals and reducing noise can still be achieved due to the increase in the number of detection groups.

[0085] The spacing determined by the transmission speed of the object to be detected, the exposure time of the first detector and the exposure time of the second detector can improve the receiving efficiency of the scattered light beam signal, while also ensuring the accurate solution of the object to be detected 160.

[0086] Figure 3 Schematic diagram showing the arrangement of the first detector and the second detector in an embodiment of the present invention.

[0087] In one embodiment, in order to improve the receiving efficiency of the scattered light beam signal and minimize the cost of the detection system, the first detector 120 includes at least two dual-energy transmission detectors and the second detector 130 includes at least one photon counting scattering detector.

[0088] It should be understood that, in addition to receiving scattered beam signals of multiple object points of a single beam signal, the photon counting scattering detector can also simultaneously receive scattered beam signals generated by different beam signals in the same column of beam signals and scattered beam signals generated by different beam signals in different columns of beam signals. In addition, since multiple photon counting scattering detectors are arranged along the transmission direction of the object to be detected, multiple detections of multiple columns of beam signals can be summed, thereby increasing the accuracy of detection and improving the efficiency of detection.

[0089] like Figure 3 As shown, the dual-energy transmission detector and the photon counting scattering detector are arranged alternately along the transmission direction of the object to be detected. The dual-energy transmission detector receives multiple columns of transmission light beam signals after passing through the object to be detected. The photon counting scattering detector receives the scattered light beam signal.

[0090] exist Figure 3 It can be seen that the photon counting scattering detector 1 can detect the scattered beam signal 1 of the column beam signal 1, and the dual-energy transmission detector 1 can detect the transmitted beam signal 1 of the column beam signal 1; Figure 3 It can be seen that the photon counting scattering detector 1 can detect the scattered beam signal 2 of the column beam signal 2, and the dual-energy transmission detector 2 can detect the transmitted beam signal 2 of the column beam signal 2, and these two processes occur simultaneously. Since the designed pass coding plate corresponds to the photon counting scattering detector, the photon counting scattering detector 1 is limited to only detect the scattered beam signal 1 and the scattered beam signal 2. The scattered beam signals generated by two adjacent column beam signals can be detected simultaneously through alternating distribution, which improves the utilization efficiency of the photon counting scattering detector in detecting the scattered beam signals. A coding plate is placed in front of the photon counting scattering detector to improve the stability in the process of solving the beam signal.

[0091] Figure 4 is a schematic diagram showing a scattered light beam signal in an embodiment of the present invention.

[0092] like Figure 4 As shown, Figure 4 The solid line in the middle is the transmitted beam signal, and the dotted line is the scattered beam signal received by the second detector 130 through the collimation device 140. The first scattered beam signal indicates the scattered beam signal from different voxel points of the same beam signal, the second scattered beam signal indicates the scattered beam signal from different beam signals of the same column of beam signals, and the third scattered beam signal indicates the scattered beam signal from different column beam signals. By alternately distributing the first detector 120 and the second detector 130, the scattered beam signals generated by two adjacent columns of beam signals can be detected simultaneously, thereby improving the utilization efficiency of the scattered beam signal detected by the photon counting scattering detector. In front of the photon counting scattering detector, a coding plate is placed to improve the stability of the solution detection process.

[0093] Figure 5 Schematic diagram showing the position of an object to be detected in an embodiment of the present invention.

[0094] The following are specific experimental examples.

[0095] The signals cited in the embodiments of the present invention are all typical values ​​of the detection system. For the case where k is a fixed value of periodic distribution, the analysis and implementation process is similar for the case where k is not a fixed value.

[0096] For example: Figure 5 As shown, the height of the object to be detected is 200 millimeters (mm), the front surface is 1200 mm away from the plane where the first detector 120 and the second detector 130 are located, and the rear surface is 600 mm away from the plane where the first detector 120 and the second detector 130 are located. Due to the limitation of the coding plate / collimator, the scattered light beam signal with a scattering angle of 3° is detected. Most of the scattered light beam signals are distributed in the range of 30 mm to 60 mm on both sides of the first detector 120. The spacing between every two first detectors 120 is 90 mm, and a total of 10 columns of light beam signals are placed. Correspondingly, the spacing L of the first detectors 120 is also 90 mm, and each second detector 130 is distributed in the middle of two adjacent first detectors 120, with a width of 30 mm to ensure that most of the required scattered photons are collected.

[0097] Since the reconstruction accuracy requirement for the spatial scattered beam signal of the object to be detected is 10mm×10mm×10mm. Therefore, p=Q=r=10mm, it can be calculated that each column of beam signals contains 20 beam signals, and the multiple k=9, so each column of beam signals in the XOZ plane will be re-detected after 9 detections, meeting the basic requirements of detector multiplexing. The same detection results are summed. Since there are 10 columns of beam signals and detectors, if the detection results with the same signal-to-noise ratio as before are to be obtained, the time required is only 1 / 10 of the original. Since the first detector 120 and the second detector 130 are arranged at intervals, for a column of beam signals, the left and right second detectors 130 can detect symmetrically, and the time can be reduced by 1 / 2 compared to the second detector 130 distributed on one side. A column of beam signals contains 20 beam signals, so the efficiency is improved by 20 times.

[0098] The above detection system can greatly reduce the detection time and improve the detection efficiency.

[0099] The method according to the embodiment of the present invention is described in detail below with reference to the accompanying drawings.

[0100] Figure 6 is a schematic diagram showing a flow chart of a detection method provided by an embodiment of the present invention. Figure 6 As shown, the detection method 600 includes:

[0101] In step S610, a light source generator emits a plurality of columns of light beam signals, each column of light beam signals including a plurality of light beam signals.

[0102] Step S620: the first detector receives a plurality of columns of transmission light beam signals after passing through the object to be detected.

[0103] In step S630, the collimating device specifically selects multiple columns of scattered light beam signals after passing through the object to be detected.

[0104] Step S640, the second detector receives the scattered light beam signal selected by the collimation device;

[0105] Step S650, determining the detection result of the object to be detected according to the multiple columns of transmitted light beam signals and the selected scattered light beam signals.

[0106] According to the detection method of an embodiment of the present invention, since multiple columns of light beam signals are used and the first detector 120 and the second detector 130 are alternately arranged in the transmission direction of the object to be detected 160, the number of photons in the scattered light beam signal collected per unit time is greatly increased, that is, the collection efficiency of the scattered light beam signal is improved.

[0107] Other details of the detection method according to the embodiment of the present invention are combined with the above Figures 1 to 5 The detection system according to the embodiment of the present invention described is similar and will not be described in detail here.

[0108] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product or a computer-readable storage medium. The computer program product or computer-readable storage medium includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present invention is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions can be transmitted from a website site, computer, server or signal center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or signal center. The computer-readable storage medium can be any available medium that a computer can access or a signal storage device such as a server, signal center, etc. that contains one or more available media integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)).

[0109] It should be clear that the present invention is not limited to the specific configuration and processing described above and shown in the figure. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiment, several specific steps are described and shown as examples. However, the method process of the present invention is not limited to the specific steps described and shown. After understanding the spirit of the present invention, those skilled in the art can make various changes, modifications and additions, or change the order between the steps. The above is only a specific embodiment of the present invention. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working process of the system, module and unit described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here. It should be understood that the protection scope of the present invention is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be covered within the protection scope of the present invention.

Claims

1. An X-ray detection system, characterized in that: The detection system comprises: A light source generator, a first detector, a second detector, a collimation device, and a processor; The first detector and the second detector are arranged alternately in a transmission direction of the object to be detected; The light source generator is used to emit multiple columns of light beam signals, each column of light beam signals includes multiple light beam signals; The first detector is used to receive a plurality of transmission light beam signals after passing through the object to be detected; The collimating device is used to specifically select multiple columns of scattered light beam signals after passing through the object to be detected; The second detector is used to receive the scattered light beam signal selected by the collimation device; The processor is used to determine the detection result of the object to be detected according to the multiple columns of transmitted light beam signals and the selected scattered light beam signals; Wherein, the second detector is arranged between two adjacent first detectors; the light beam signal emission direction of the light source generator is the positive direction of the X-axis of the three-dimensional Cartesian coordinate system, and the transmission direction of the object to be detected is the Y-axis of the three-dimensional Cartesian coordinate system.

2. The detection system according to claim 1, characterized in that: The incident plane of the multiple-column light beam signals is a YOZ plane, and the incident points on the YOZ plane are distributed in two-dimensional discrete manner.

3. The detection system according to claim 2, characterized in that: The incident points of the multiple columns of light beam signals are arranged at equal intervals on the Z axis of the three-dimensional Cartesian coordinate system, and are distributed at equal intervals or unequal intervals on the Y axis.

4. The detection system according to claim 3, characterized in that: The Y-axis spacing is a distance determined by the transmission speed of the object to be detected, the exposure time of the first detector, and the exposure time of the second detector.

5. The detection system according to claim 3, characterized in that: The straight line formed by the incident points of the column beam signals is parallel to the Z axis.

6. The detection system according to claim 1, characterized in that: The number of the first detectors is at least 2, and the first detectors are dual-energy transmission detectors.

7. The detection system according to claim 1, characterized in that: The number of the second detectors is at least one, and the second detector is a photon counting scattering detector.

8. The detection system according to claim 1, characterized in that: The first detector is directly opposite to the light source generator.

9. The detection system according to claim 1, characterized in that: The collimation device comprises: a collimator or a coding plate, and the coding plate or the collimator is directly opposite to the second detector.

10. A method for detecting X-rays, characterized in that: The detection method comprises: The light source generator emits a plurality of beam signals, each beam signal comprising a plurality of beam signals; The first detector receives a plurality of transmission light beam signals after passing through the object to be detected; The collimating device specifically selects the multiple columns of scattered light beam signals after passing through the object to be detected; The second detector receives the scattered light beam signal selected by the collimation device; Determining the detection result of the object to be detected according to the multiple columns of transmitted light beam signals and the selected scattered light beam signals; In which, the first detector and the second detector are alternately arranged in the transmission direction of the object to be detected, and the second detector is arranged between two adjacent first detectors; the light beam signal emission direction of the light source generator is the positive direction of the X-axis of the three-dimensional Cartesian coordinate system, and the transmission direction of the object to be detected is the Y-axis of the three-dimensional Cartesian coordinate system.

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