CN109946747A - A kind of dual intensity CT detection system based on novel detection device - Google Patents
A kind of dual intensity CT detection system based on novel detection device Download PDFInfo
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- CN109946747A CN109946747A CN201910228124.8A CN201910228124A CN109946747A CN 109946747 A CN109946747 A CN 109946747A CN 201910228124 A CN201910228124 A CN 201910228124A CN 109946747 A CN109946747 A CN 109946747A
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- 230000003447 ipsilateral effect Effects 0.000 claims abstract description 6
- 238000009434 installation Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
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- 239000004411 aluminium Substances 0.000 claims description 4
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- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 229910052793 cadmium Inorganic materials 0.000 claims description 4
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims description 4
- XQPRBTXUXXVTKB-UHFFFAOYSA-M caesium iodide Chemical compound [I-].[Cs+] XQPRBTXUXXVTKB-UHFFFAOYSA-M 0.000 claims description 4
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Abstract
A kind of dual intensity CT detection system based on novel detection device, including radiographic source (2), detection device (3), transmission device (4), rotating mechanism (5), structural foundation (6), by the way that traditional dual intensity detection device to be installed on to the low energy detector assembly (302) of substrate two sides, high energy detector component (303) is changed to ipsilateral installation, reduce the loss of useful signal, change the apparatus structure of detection system, while save the cost, the detection performance of detection system is improved.
Description
Technical field
The dual intensity CT detection system based on novel detection device that the present invention relates to a kind of, belongs to Security Inspection Equipments field.
Background technique
X ray computer double Linear Scan Imaging technology (CT technology) has been widely used for the ground pair such as airport and customs at present
In the safety inspection that luggage or cargo carry out, safety check CT system is capable of forming the 3-D image of checking matter, more conducively carries out to it
Accurate judgement.And the dual intensity CT technology of rising in recent years can also design detection by special dual intensity system and obtain the original of checking matter
Sub- ordinal information can be realized accurate judgement to drugs, explosive.General CT system is by radiographic source, slip ring, computer, control
The part such as system, conveyer belt, detection device and data collection system forms.Wherein detection device to the performance of whole CT system and
Cost suffers from tremendous influence.
In traditional dual intensity CT detection system, dual intensity CT detection system is mostly by low energy detector assembly, high energy detector
Component, filter plate between the two and installation components above simultaneously can be by detectable signal extractions based on printed circuit board
Substrate P CB composition, low energy detector assembly therein is positioned close to radiographic source side and high energy detector component is arranged remote
From radiographic source side, filter plate is disposed there between.In this traditional panel detector structure, since ray signal needs are worn
Low energy detector, PCB, filter plate are crossed, end could be really collected there are also a part of high energy detector and be collected into, therefore exist
Many problems, for example penetrating process causes useful signal that can additionally be lost；The big cost of double decker detector packaging technology difficulty compared with
It is high.
Summary of the invention
Technical problem solved by the present invention is in currently available technology, in existing detection system collection process effectively
Ray signal can additionally be lost, double decker detector encapsulation cost performance is low problem proposes a kind of based on novel detection device
Dual intensity CT detection system.
The present invention solves above-mentioned technical problem and is achieved by following technical solution:
A kind of dual intensity CT detection system based on novel detection device, including radiographic source 2, detection device 3, transmission device 4,
Rotating mechanism 5, structural foundation 6, the rotating mechanism 5 are cirque structure, and the rotating mechanism 5 is installed in structural foundation 6
Between position, 4 both ends of transmission device with detection 6 both ends of pedestal roller bearing be connected, perpendicular to 5 plane of rotating mechanism and pass through revolve
It is same that the detection device component of 5 hollow space of rotation mechanism, the radiographic source 2 and multiple detection devices 3 composition is installed on rotating mechanism 5
Side, and installation center position is symmetrical about transmission device 4, in which:
The detection device 3 includes PCB substrate 301, low energy detector assembly 302, high energy detector component 303, filtering
Piece 304, it is ipsilateral that the low energy detector assembly 302, high energy detector component 303 are respectively arranged in PCB substrate 301, installation position
It sets away from radiographic source apart from identical, the filter plate 304 is installed on 303 upper surface of high energy detector component.
It further include computer system 7, the low energy detector assembly 302, high energy detector component 303 are received respectively through filtering
Projection image information after the filtering processing of wave plate 304, and computer system 7 is sent to by rotating mechanism 5, in which:
Gained projection image information is carried out three-dimensional reconstruction and image co-registration by the computer system 7, by low energy detector
The longer projection image information's conduct of length in the projection image information that component 302, high energy detector component 303 are respectively received
Principal view, while the projection image information of length shorter part is integrated into principal view, then pass through sill decomposition method and economic benefits and social benefits
Decomposition method is answered to calculate the atomic number of checking matter and density and be shown.
The radiographic source 2 is X-ray machine or ray accelerator.
The detection device component is arc-shaped.
It is one circle/second to 6 circles/second that the rotating mechanism 5, which drives radiographic source 2, detection device 3 to carry out unilateral velocity of rotation,.
The low energy detector assembly 302, high energy detector component 303 are of same size, and length may be the same or different.
4 transmitting range of conveyer belt is visited no more than low energy detector assembly 302, high energy when the rotation of rotating mechanism 5 is turned around
Survey the half of projected length the larger value in device assembly 303.
The low energy detector assembly 302 includes for converting ray signal to the scintillator of visible light, it will be seen that light
Signal is converted into the photodiode of electric signal, and scintillator material is cesium iodide or cadmium tungstate, dodges in low energy detector assembly 302
Bright body thickness is 0.2-1.5mm.
The high energy detector component 303 includes for converting ray signal to the scintillator of visible light, it will be seen that light
Signal is converted into the photodiode of electric signal, and scintillator material is cesium iodide or cadmium tungstate, dodges in high energy detector component 303
Bright body thickness is 2-5mm.
304 material of filter plate is aluminium, iron, copper, lead or combinations thereof.
The advantages of the present invention over the prior art are that:
A kind of dual intensity CT detection system based on novel detection device provided by the invention, by detecting traditional bilayer
Device assembly is changed to be installed on substrate, reduces loss of the useful signal in detection process, while being set to substrate for original
Low energy detector assembly, the high energy detector component of two sides are set to the ipsilateral both ends of substrate.
Detailed description of the invention
Fig. 1 is the CT dual intensity system structure diagram that invention provides；
Fig. 2 is the detection device structural schematic diagram that invention provides；
Fig. 3 is that multiple detection devices splice schematic diagram；
Specific embodiment
A kind of dual intensity CT detection system based on novel detection device, as shown in Fig. 2, including by radiographic source 2, detection device
3, transmission device 4, rotating mechanism 5, structural foundation 6, computer system 7 are constituted.Wherein radiographic source 2 is fixed on rotating mechanism 5,
Can be X-ray machine or accelerator etc. can be generated the device of ray by electrical energy drive；As shown in figure 3, complete double at one
In energy CT system, needs multiple detection devices 3 to be spliced into arc-shaped detection device component, be mounted on face on rotating mechanism 5
The other side of radiographic source 2；Rotating mechanism 5 is circular ring type structure, is able to drive radiographic source 2 and detection device component high speed rotation,
Reliable signal communication and electric energy supply are provided simultaneously for all rotary devices；Transmission device 4 can be transmitted checking matter along rotation
The movement in vertical direction of 5 Plane of rotation of mechanism；Computer system 7 can be a computer and be also possible to multiple stage computers group,
It can receive the high and low energy picture signal that detection device 3 detects and carry out three-dimensional reconstruction and high and low energy image based on this signal
The 3-D image that fusion treatment forms dual intensity is alarmed for user's interpretation dangerous material or intelligent interpretation, while it also can control complete machine
Mechatronic Systems simultaneously is responsible for interacting with user；Structural foundation 6 then provides reliable structural support for all components of complete machine.
Wherein, detection device 3 includes PCB substrate 301, low energy detector assembly 302, high energy detector component 303, filtering
Piece 304.As shown in Figure 1, low energy detector assembly 302 and the setting of high energy detector component are ipsilateral in PCB substrate 301, and locate
In the both ends of machine system direction of transfer；Low energy detector assembly 302 is made of scintillator and diode, and imaging pixel can be with
It is that face battle array pixel is also possible to single row or multiple rows pixel, the close-range shot line source side of PCB substrate 301 is set；High energy detector component
303 are made of scintillation material and diode, and imaging pixel can be face battle array pixel and be also possible to single row or multiple rows pixel, are arranged
In the close-range shot line source side of PCB substrate 301, high energy detector component 303 and the width of low energy detector assembly 302 are essentially identical,
Length can be the same or different；The top of high energy detector component 303 is arranged in filter plate 304, and material is radiation absorption
Material, can be that aluminium, iron, copper, the alloy of at least one of a kind of or aluminium, iron, copper, lead is made in lead.
Wherein, high energy detector component 303 and low energy detector assembly 302 are respectively received article to be detected through filter plate
The image information projected after 304 filtering processings, and computer system 7 is transferred to by rotating mechanism 5；
Meanwhile the computer system 7 of this system carries out three-dimensional reconstruction and height according to the image information that article to be detected projects
Low energy image co-registration, wherein three-dimensional rebuilding method uses iterative method or filtered back-projection, utilizes high energy detector component
303 and low energy detector assembly 302 in length compared with elder image information by as principal view and determine fused image figure
As resolution ratio, the image information of length shorter one will be integrated into principal view, should be decomposed by sill decomposition method or economic benefits and social benefits
Method calculates the atomic number of checking matter and density and is shown.
It is further described combined with specific embodiments below:
In detection device 3, the high energy detector component 303 and 302 length of low energy detector assembly of selection are 300 millis
Rice, width are 80 millimeters, and 5 revolving speed of rotating mechanism is that 4 circles are per second, and 304 material of filter plate is tungsten nickel.
When double-energy CT system 1 is run, beam is persistently emitted by radiographic source 2, and rotating mechanism 5 drives radiographic source 2 and visits
Device 3 is surveyed along one direction uniform rotation, velocity of rotation is generally 1 circle/second to 6 circles/second.Simultaneously transmission device 4 drives quilt
Examine article height along the movement in vertical direction and through its center of 5 Plane of rotation of rotating mechanism, speed V and detector assembly 3
Energy detector assembly 303 is related compared with the length L of elder to length in low energy detector assembly 302, the theoretically every rotation of rotating mechanism 5
The half of the projector distance of L covering is not to be exceeded in the distance that transmission device 4 moves in the time turned around.Work as inspected object
Projection when entering in the overlay area of detection device 3, high energy detector component 303 and low energy detector assembly 302 will be respectively
The image information of its projection is received, this information can be transferred to computer system 7 by rotating mechanism 5, and carry out three-dimensional reconstruction
With high and low energy image co-registration, wherein three-dimensional rebuilding method can be iterative method or filtered back-projection etc., and high energy detects at this time
Length will determine fused image as principal view compared with the image information of elder in device assembly 303 and low energy detector assembly 302
Image resolution ratio, and the image information of length shorter one will be integrated into principal view, be answered by sill decomposition method or economic benefits and social benefits
The dual-energy images Processing Algorithm such as decomposition method accurately calculates the atomic number and density and by three-dimensional pseudocolour picture of checking matter
Shape shows user.It should be noted that needing to measure high energy detector when high energy image information and low energy image information fusion
The imaging spacing of component 303 and low energy detector assembly 302, because the two is not to send out simultaneously to the detection of checking matter same position
Raw.
After obtaining the 3-D image of dual intensity, user can interact with computer system 7, cut to this image
It cuts, count, check slice, change the operation such as transparency and dyeing；Also the dangerous material based on artificial intelligence can be used to know automatically
Other technology allows computer system 7 to carry out intelligent recognition, the dangerous material interpretation speed and man efficiency of raising to image.
The content that description in the present invention is not described in detail belongs to the well-known technique of those skilled in the art.
Claims (10)
1. a kind of dual intensity CT detection system based on novel detection device, it is characterised in that: including radiographic source (2), detection device
(3), transmission device (4), rotating mechanism (5), structural foundation (6), the rotating mechanism (5) are cirque structure, the rotation
Mechanism (5) is installed on structural foundation (6) middle position, the roller bearing phase at transmission device (4) both ends and detection pedestal (6) both ends
Even, perpendicular to rotating mechanism (5) plane and across rotating mechanism (5) hollow space, the radiographic source (2) and multiple detection devices
(3) it is ipsilateral to be installed on rotating mechanism (5) for the detection device component formed, and installation center position about transmission device (4) symmetrically,
Wherein:
The detection device (3) include PCB substrate (301), low energy detector assembly (302), high energy detector component (303),
Filter plate (304), the low energy detector assembly (302), high energy detector component (303) are respectively arranged in PCB substrate (301)
Ipsilateral, for installation site away from radiographic source apart from identical, the filter plate (304) is installed on high energy detector component (303) upper surface.
2. a kind of dual intensity CT detection system based on novel detection device according to claim 1, it is characterised in that: also wrap
It includes computer system (7), the low energy detector assembly (302), high energy detector component (303) are received respectively through filter plate
(304) projection image information after being filtered, and computer system (7) are sent to by rotating mechanism (5), in which:
Gained projection image information is carried out three-dimensional reconstruction and image co-registration by the computer system (7), by low energy detector group
The longer projection image information of length makees in the projection image information that part (302), high energy detector component (303) are respectively received
For principal view, while the projection image information of length shorter part is integrated into principal view, then passes through sill decomposition method and double
The atomic number and density of effect decomposition method calculating checking matter are simultaneously shown.
3. a kind of dual intensity CT detection system based on novel detection device according to claim 1, it is characterised in that: described
Radiographic source (2) is X-ray machine or ray accelerator.
4. a kind of dual intensity CT detection system based on novel detection device according to claim 1, it is characterised in that: described
Detection device component is arc-shaped.
5. a kind of dual intensity CT detection system based on novel detection device according to claim 1, it is characterised in that: described
It is one circle/second to 6 circles/second that rotating mechanism (5), which drives radiographic source (2), detection device (3) to carry out unilateral velocity of rotation,.
6. a kind of dual intensity CT detection system based on novel detection device according to claim 1, it is characterised in that: described
Low energy detector assembly (302), high energy detector component (303) are of same size, and length may be the same or different.
7. a kind of dual intensity CT detection system based on novel detection device according to claim 1, it is characterised in that: described
Conveyer belt (4) transmitting range is no more than low energy detector assembly (302), high energy detector group when rotating mechanism (5) rotation is turned around
The half of projected length the larger value in part (303).
8. a kind of dual intensity CT detection system based on novel detection device according to claim 1, it is characterised in that: described
Low energy detector assembly (302) includes for converting ray signal to the scintillator of visible light, it will be seen that optical signal is converted into
The photodiode of electric signal, scintillator material are cesium iodide or cadmium tungstate, scintillator thickness in low energy detector assembly (302)
For 0.2-1.5mm.
9. a kind of dual intensity CT detection system based on novel detection device according to claim 1, it is characterised in that: described
High energy detector component (303) includes for converting ray signal to the scintillator of visible light, it will be seen that optical signal is converted into
The photodiode of electric signal, scintillator material are cesium iodide or cadmium tungstate, scintillator thickness in high energy detector component (303)
For 2-5mm.
10. a kind of dual intensity CT detection system based on novel detection device according to claim 1, it is characterised in that: institute
Stating filter plate (304) material is aluminium, iron, copper, lead or combinations thereof.
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| CN111366982A (en) * | 2020-03-10 | 2020-07-03 | 上海英曼尼安全装备有限公司 | Detector device of dual-energy CT system, dual-energy CT system and image reconstruction method |
| CN114527649A (en) * | 2022-01-19 | 2022-05-24 | 苏州雷泰医疗科技有限公司 | Network learning control method and equipment based on large slip ring cone beam dual-source energy spectrum CT |
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