CN202217062U

CN202217062U - Double energy X-ray array detector

Info

Publication number: CN202217062U
Application number: CN2011203149306U
Authority: CN
Inventors: 刘笠浩
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-08-26
Filing date: 2011-08-26
Publication date: 2012-05-09
Anticipated expiration: 2021-08-26

Abstract

The utility model discloses a double energy X-ray array detector, comprising, in the X-ray incidence direction, a first scintillator array, a first photodiode array, a first filter array, a PCB board, a second filter array, a second photodiode array, and a second scintillator array, wherein above functional devices are integrated into a component. The double energy X-ray array detector can be used for detecting the relative difference between middle energy portion and high energy portion in X-ray energy spectrum passing through objects, and further provides basis for material identification.

Description

A kind of dual-energy x-ray detector array

Technical field:

The utility model relates to the radiation image-forming system detector, particularly is applied to a kind of dual-energy x-ray detector array in the X-radiation imaging systemization.

Background technology:

X ray penetrates after the seized object; Its power spectrum can change; It changes relevant with the material composition of seized object, and traditional dual-energy x-ray detector is made up of two detectors of high and low ability, and wherein each detector comprises a scintillator arrays and a photodiode array again.The low energy detector array is arranged in the side near seized object, mainly absorbs the low energy part in the X-ray energy spectrum, and the high energy detector array is arranged in low energy detector array back, mainly absorbs the high energy part in the X-ray energy spectrum.Generally between low energy array survey device and high energy detector array, also dispose a filter plate and absorb the low energy part in the X-ray energy spectrum.Traditional dual-energy x-ray detector is unfavorable for accomplishing high and low can the sampling at same ray position by passage in the dual-energy x-ray detector array, and then influences the capabilities for material recognition of scanning system.

Summary of the invention:

The purpose of the utility model is in order to address the above problem; A kind of dual-energy x-ray detector array is provided; Utilize this dual-energy x-ray detector can measure low energy part and high energy relative difference partly in the X-ray energy spectrum that penetrates object, and then the foundation of identification material.

In order to achieve the above object; The technical scheme that the utility model provides is: the dual-energy x-ray detector array is along comprising primary scintillator array, first photodiode, first filter plate, pcb board, second filter plate, second photodiode array and secondary fluor array in regular turn on the incident direction of X ray, said primary scintillator array, first photodiode array, first filter plate, second filter plate, second photodiode array and secondary fluor array all are integrated on institute's pcb board with welding or bonding mode.

Before the primary scintillator array, also comprise collimator array.

Also be integrated with data acquisition circuit on the described pcb board with welding or bonding mode.

Corresponding components and parts between all identical and each array of the component number that is comprised in said each array are aligned with each other.

Described primary scintillator array and secondary fluor array are made up of identical or different scintillator material.

The optional CsI of described scintillator material (T1), CdWO ₄, GOS, ZnSe, YAG.

The material of described first filter plate and second filter plate is the alloy material of copper, silver, gold or cupric, silver, gold.

The energy of the x-ray photon of deposition energy is lower than the energy of the x-ray photon of deposition energy in the secondary fluor array in the primary scintillator array.

A kind of dual-energy x-ray detector array that the utility model proposes is integrated in low energy detector array, filter plate and high energy detector array on the parts, the convenient manufacturing and use.Simultaneously because low energy detector array and the contraposition of high energy detector array are accurate, so help improving the recognition capability of ray scanning system to material.

Description of drawings:

Fig. 1 is the synoptic diagram of a kind of dual-energy x-ray detector array of the utility model embodiment 1.

Fig. 2 is the synoptic diagram of a kind of dual-energy x-ray detector array of the utility model embodiment 2.

Fig. 3 is the synoptic diagram of a kind of dual-energy x-ray detector array of the utility model embodiment 3.

Among the figure: 1, low energy scintillator arrays, 2, the high energy scintillator arrays, 3, first photodiode array, 4, second photodiode array, 5, first filter plate, 6, second filter plate, 7, pcb board, 8, collimator array, 9, Acquisition Circuit.

Embodiment:

Embodiment 1:

Fig. 1 is the synoptic diagram of a kind of dual-energy x-ray detector array of the utility model embodiment 1.As shown in the figure, 1 is that low energy scintillator arrays, 2 is the high energy scintillator arrays, and 3 is that first photodiode array, 4 is that second photodiode array, 5 is that first filter plate, 6 is that second filter plate, 7 is pcb board.As shown in the figure, above-mentioned low energy scintillator arrays 1, high energy scintillator arrays 2, first photodiode array 3, second photodiode array 4, first filter plate 5, second filter plate 6 are integrated on the pcb board 7 through welding or bonding mode.

As X ray A during from 1 incident of low energy scintillator arrays, it excites passage of scintillation light earlier at low energy scintillator arrays 1 internal precipitate energy, converts blinking light to low energy by first photodiode array 3 and surveys electric signal.Afterwards, X ray continues across first filter plate 5, pcb board 7, second filter plate 6 and second photodiode array 4, finally gets into high energy scintillator arrays 2, and sinks to the bottom energy in scintillator inside and discharge passage of scintillation light.Collect blinking light and convert thereof into the high energy detector electric signal by second photodiode array 4.Then.Above-mentioned high and low ability detector electric signal provide follow-up data acquisition circuit through circuit on the pcb board 7 and plug connector output.

Embodiment 2:

Fig. 2 is the synoptic diagram of a kind of dual-energy x-ray detector array of the utility model embodiment 2.As shown in the figure; Above-mentioned dual-energy x-ray array explosive, drugs detector can also have collimator array 8; This collimator array 8 is positioned at before the low energy scintillator arrays 1, and it can or bond together with 1 welding of low energy scintillation array, also can prevent in the position near low energy scintillator arrays 1.Among Fig. 21 is that low energy scintillator arrays, 2 is that high energy scintillator arrays, 3 is that first photodiode array, 4 is second photodiode array, and 5 is that first filter plate, 6 is that second filter plate, 7 is the collimator array of pcb board, 8 for being made up of high atomic number material.Above-mentioned low energy scintillator arrays 1, high energy scintillator arrays 2, first photodiode array 3, second photodiode array 4, first filter plate 5, second filter plate 6 also are integrated on the pcb board 7 through welding or bonding mode.In the course of the work through seized X ray A at first incident just get into low energy scintillator arrays 1 then through collimator array 8, reduce the scattering composition among the X ray A with this.X ray excites passage of scintillation light at low energy scintillator arrays 1 internal precipitate energy afterwards, converts blinking light to low energy by first photodiode array 3 and surveys electric signal.Afterwards, X ray continues across first filter plate 5, PCB7, second filter plate 6 and second photodiode array 4, finally gets into high scintillator arrays 2, and sinks to the bottom energy in scintillator inside and discharge passage of scintillation light.Collect blinking light and convert thereof into the high energy detector electric signal by second photodiode array 4.Then.Above-mentioned high and low ability detector electric signal provide follow-up data acquisition circuit through circuit on the pcb board 7 and plug connector output.

Embodiment 3:

Fig. 3 is the synoptic diagram of a kind of dual-energy x-ray detector array of the utility model embodiment 3.As shown in the figure; 31 are low energy detector (comprising low energy scintillator, first photodiode array, first filter plate) and 32 high energy detectors (comprising high energy scintillator, second photodiode, second filter plate); 7 is the PVB plate; Also comprise data acquisition circuit 9 on this pcb board 7, as shown in Figure 3, the X ray A of the seized object of process converts low energy and high energy output signal respectively to through low energy detector 31 and high energy detector 32; The data acquisition circuit 9 that these signals can directly be integrated on the pcb board 7 is further handled signal, perhaps directly passes to change digital signal output into.

Described primary scintillator array and secondary fluor array are made up of identical or different scintillator material.The optional CsI of described in addition scintillator material (T1), CdWO ₄, GOS, ZnSe, YAG etc.

In order to guarantee the accuracy of result of detection, all identical and corresponding components and parts each array spare of the component number that is comprised in said each array are provided with the mode that is aligned with each other.

The above; Be not that the utility model is done any formal and substantial qualification; All technician who is familiar with the industry, in not breaking away from the utility model technical scheme scope, the technology contents that is disclosed more than capable of using; And a little change of making, modify the equivalent variations with differentiation, be the equivalent embodiment of the utility model.

Claims

1. dual-energy x-ray detector array; It is characterized in that: this dual-energy x-ray detector array is along comprising primary scintillator array, first photodiode, first filter plate, pcb board, second filter plate, second photodiode array and secondary fluor array in regular turn on the incident direction of X ray, said primary scintillator array, first photodiode array, first filter plate, second filter plate, second photodiode array and secondary fluor array all are integrated on institute's pcb board with welding or bonding mode.

2. a kind of dual-energy x-ray detector array according to claim 1 is characterized in that: before the primary scintillator array, also comprise collimator array.

3. a kind of dual-energy x-ray detector array according to claim 1 and 2 is characterized in that: also be integrated with data acquisition circuit with welding or bonding mode on the described pcb board.

4. a kind of dual-energy x-ray detector array according to claim 1 and 2 is characterized in that: the corresponding components and parts between all identical and each array of the component number that is comprised in said each array are aligned with each other.

5. a kind of dual-energy x-ray detector array according to claim 1 and 2 is characterized in that: described primary scintillator array and secondary fluor array are made up of identical or different scintillator material.

6. a kind of dual-energy x-ray detector array according to claim 5 is characterized in that: the optional CsI of described scintillator material (T1), CdWO ₄, GOS, ZnSe, YAG.

7. a kind of dual-energy x-ray detector array according to claim 1 and 2 is characterized in that: the material of described first filter plate and second filter plate is the alloy material of copper, silver, gold or cupric, silver, gold.

8. a kind of dual-energy x-ray detector array according to claim 1 and 2 is characterized in that: the energy of the x-ray photon of deposition energy is lower than the energy of the x-ray photon of deposition energy in the secondary fluor array in the primary scintillator array.