CN209215261U - A kind of scanner for X-ray transmission and back scattering integral imaging system - Google Patents
A kind of scanner for X-ray transmission and back scattering integral imaging system Download PDFInfo
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- CN209215261U CN209215261U CN201821910446.8U CN201821910446U CN209215261U CN 209215261 U CN209215261 U CN 209215261U CN 201821910446 U CN201821910446 U CN 201821910446U CN 209215261 U CN209215261 U CN 209215261U
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- back scattering
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Abstract
The utility model relates to a kind of scanners for X-ray transmission and back scattering integral imaging system, including X-ray tube, fixed platform shell and collimator；The fixed platform shell is connected with collimator；The X-ray tube protrudes into the fixed platform shell installation；The circumferential direction of the collimator is provided with transmission scan slot and back scattering scanning holes and can rotate so that the x-ray of X-ray tube transmitting passes through the transmission scan slot or back scattering scanning holes, or the x-ray interval of the X-ray tube transmitting is made to pass through the transmission scan slot and back scattering scanning holes.The beneficial effects of the utility model are as follows: (1) by the rotation of collimator, can alternately provide transmission and back scattering flying spot beam using an x-ray source, can be effectively reduced equipment cost；(2) X-ray transmission and back scattering integral imaging system use a radiographic source, can effectively reduce equipment volume.
Description
Technical field
The utility model relates to nuclear industry fields, and in particular to one kind is integrally imaged for X-ray transmission and back scattering is
The scanner of system.
Background technique
X-ray imaging system may be implemented as a kind of widely accepted main safety check technological means to objects such as row packets
The quick inspection of product and the examination of cargo at various land, sea, air ports.X-ray imaging system mainly has transmission and back scattering at present
Two ways is imaged.Transmission imaging mainly shows the image of heavy substance, is the strong hand for detecting the contrabands such as gun, metal knife
Section, back scattering imaging can effectively provide checking matter surface layer compared with low atomic number and the geometry of the higher checking matter of density and
Spatial distribution characteristic, can effectively check the contrabands such as explosive, liquid, drugs, and back scattering imaging is combined with transmission imaging can be with
Obtain comprehensive detection information.
Transillumination imaging system generallys use line scanning mode, and transmission detectors use linear array, can meet high frequency scan, schemes
As high resolution；Back scattering imaging system generally takes spot scan mode, and backscatter detector is brilliant using the scintillator of large area
Body (group), since backscatter signal is small and weak, to guarantee that certain signal-to-noise ratio is difficult to realize high-frequency scanning, backscatter images are empty
Between resolution ratio it is more compared with transmission plot aberration.
Currently, towards safety check application preferably while having the function of X-ray transmission imaging and two kinds of functions of back scattering imaging.One
As combine two kinds of functions equipment take cascade, X-ray transmission and back scattering imaging system are needed using X independent of each other
Ray machine, collimator and detector complete substance Scanning Detction, generate transmission respectively and backscatter images, feature are imaging times
Long, transmission image and backscatter images spatial resolution are inconsistent, and the big deployment of equipment volume is difficult.
In view of this, special propose the utility model.
Utility model content
In view of the deficiencies in the prior art, the purpose of the utility model is to provide one kind for X-ray transmission and back
The scanner for scattering integral imaging system, can be realized using an X-ray machine while having both transmission and back scattering imaging function.
The technical solution of the utility model is as follows:
A kind of scanner for X-ray transmission and back scattering integral imaging system, including X-ray tube, fixed platform shell
And collimator；The fixed platform shell is connected with collimator；The X-ray tube protrudes into the fixed platform shell installation；It is described
The circumferential direction of collimator is provided with transmission scan slot and back scattering scanning holes and can rotate so that the X-ray of X-ray tube transmitting is penetrated
Line passes through the transmission scan slot or back scattering scanning holes, or makes the x-ray interval of the X-ray tube transmitting across described
Penetrate scanning slot and back scattering scanning holes.
Further, the above-mentioned scanner for X-ray transmission and back scattering integral imaging system, the fixed platform
Shell and collimator are taper, and the two big opening end is opposite to be connected.
Further, the above-mentioned scanner for X-ray transmission and back scattering integral imaging system, the collimator are small
Mouth end is provided with inner shaft, and the inner shaft is connect with motor drive by bearing of motor to obtain rotary power.
Further, the above-mentioned scanner for X-ray transmission and back scattering integral imaging system, on the motor
Connect position sensor.
Further, the above-mentioned scanner for X-ray transmission and back scattering integral imaging system, the collimator
The big opening end of big opening end or fixed platform shell is provided with shielding enhancing structure.
Further, the above-mentioned scanner for X-ray transmission and back scattering integral imaging system, the shielding enhancing
Structure includes convenient for overlapped shielding trench.
Further, the above-mentioned scanner for X-ray transmission and back scattering integral imaging system, the transmission scan
Slot and the setting of back scattering scanning holes interval, the transmission scan slot and back scattering scanning holes are coplanar, and the plane and the collimation
The rotation axis of device inner shaft is vertical, and X-ray tube focus is on the rotation axis of the collimator.
Further, the above-mentioned scanner for X-ray transmission and back scattering integral imaging system, between the collimator
Every be provided with 3 transmission scan slots and 3 back scattering scanning holes.
Further, the above-mentioned scanner for X-ray transmission and back scattering integral imaging system, transmission scan slot circle
Heart subtended angle is Δ θ=20 °, and angle is 100 ° between adjacent transmission scan slot, and the middle position of adjacent transmission scan slot is provided with
Back scattering scanning holes；The X-ray tube formation is the fan-ray beam that beam should be that angle is strictly defined as Δ φ=50 °.
The beneficial effects of the utility model are as follows:
(1) by the rotation of collimator, transmission and back scattering flying spot can alternately be provided using an x-ray source
Beam can be effectively reduced equipment cost；
(2) X-ray transmission and back scattering integral imaging system use a radiographic source, can effectively reduce equipment body
Product；
(3) during collimator rotates a circle, 3 radioparent scannings and 3 back scattering spot scans can be completed；It is right
Collimator revolving speed is of less demanding；
(4) collimator and scanner fixed platform shell are made of cupro lead, it is possible to use high strength steel shell
It is collectively formed with lead screen internal layer.X-ray source is enclosed in inside by collimator and scanner fixed platform shell, can will be big absolutely
Most unwanted alpha ray shields are inside scanner.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the scanner being integrally imaged for X-ray transmission and back scattering of the utility model.
Fig. 2 is the collimator of the utility model and the assembling structure schematic diagram of fixed platform shell.
Fig. 3 is the distributed architecture of transmission scan slot and back scattering scanning holes in one embodiment of the utility model.
Fig. 4 is the simplified schematic diagram that the utility model realizes transmission function.
Fig. 5 is the simplified schematic diagram that the utility model realizes back scattering function.
Fig. 6 is that the utility model one embodiment working condition changes over time figure.
In above-mentioned attached drawing, 1, fixed platform shell；2, collimator；3, built-in collimator；5, X-ray tube；6, back scattering scans
Hole；7, transmission scan slot；8, fixed platform；9, inner shaft；10, bearing of motor；11, motor；12, position sensor；14, it carries on the back
Scattering detector；15, measured object；16, transmission detectors.
Specific embodiment
The utility model is described in detail with reference to the accompanying drawings and examples.
As shown in Figure 1, the utility model provides a kind of scanning for X-ray transmission and back scattering integral imaging system
Device, the scanner are mounted in X-ray transmission and back scattering imaging system rack, including X-ray tube 5, fixed platform shell 1 (with
Fixed platform 8 connects) and collimator 2；The fixed platform shell 1 and collimator 2 connect；The X-ray tube 5 protrudes into the fixation
Platform shell 1 is installed；The circumferential direction of the collimator 2 be provided with transmission scan slot 7 and back scattering scanning holes 6 and can rotate so that
The x-ray that the X-ray tube 5 emits passes through the transmission scan slot 7 or back scattering scanning holes 6, or sends out the X-ray tube 5
The x-ray interval penetrated passes through the transmission scan slot 7 and back scattering scanning holes 6.
In the present embodiment, X-ray tube 5 provides X-ray, passes through the built-in collimator 3 and 5 exit window of X-ray tube of X-ray tube 5
X-ray beam is confined to 50 ° of subtended angle of planar fan ray beam, fan-ray beam passes through the transmission scan slot 7 in collimator 2
Generate the small central angle fan-ray beam for transmission；Fan-shaped x-ray beam is obtained scattered for carrying on the back by the scanning holes in collimator 2
The linear beam penetrated.
X-ray source includes the components such as X-ray tube 5, coolant pipe, high voltage power cables, built-in collimator 3, exit window.X
Light pipe 5 issues X-ray, and under the built-in collimator 3 of X-ray tube 5 and the collective effect of exit window, X-ray beam is confined to open
The planar fan ray beam at 50 ° of angle provides flying spot beam for transmission and back scattering integral imaging system.
Small central angle fan-ray beam can be continuously swept to from one end another during collimator 2 at the uniform velocity rotates
End forms periodic line scanning；Linear beam continuously can also be swept to the other end from one end, form periodically point and sweep
It retouches.X-ray tube 5 is located inside scanner, and 5 focus of X-ray tube is in scanner axis, and scanner is transmission and back scattering imaging system
System provides various forms of flying spots respectively.Collimator 2 is rotated around 5 focus of X-ray tube, the fan-ray beam that X-ray tube 5 exports
Alternate transmission scan slot 7 and back scattering scanning holes 6 by 2 circumference of collimator completes the scanning to measured object 15, during which
Transmission detectors 16 and backscatter detector 14 obtain corresponding transmission, backscatter signal respectively, ultimately form measured object 15
Transmission and backscatter images.Specifically as shown in Figure of abstract.In 2 rotary course of collimator, fan-ray beam is alternately through transmission
It scans slot 7 and back scattering scanning holes 6 forms linear rays beam and scans to measured object 15,2 rotation position of collimator is by being installed on
Position sensor 12 at motor 11 obtains location information, can control transmission and backscatter detector 14 obtains corresponding transmission
And backscatter signal, form transmission and the backscatter images of measured object 15.
The fixed platform shell 1 and collimator 2 are taper, and the two big opening end is opposite to be connected.
Collimator 2 is rotatable mode, and one end and one end of fixed platform shell 1 connect together, and the other end is linked in
In rotatable inner shaft 9, the high speed rotation under the drive of external motor.As shown in Fig. 2, in the setting of 2 osculum end of collimator is described
Axis 9, the inner shaft 9 are drivingly connected by bearing of motor 10 and motor 11 to obtain rotary power.On the motor 11
Position sensor 12 is connected, the Angle Position that current collimator 2 rotates is obtained.
In the present embodiment, achievable 3 scanning, each scan period corresponding scanner center of circle in a swing circle
Angle is 360 °/3=120 °.Wherein the corresponding central angle of transmission scan slot 7 is 20 °, and angle is 100 ° between adjacent scanning slot, adjacent
Back scattering scanning holes 6 is opened in middle position between scanning slot, and the scanning angular region of back scattering scanning holes 6 is 100 °/2=50 °.It is swept low
Under the premise of retouching rate, the corresponding central angle of transmission scan slot 7 can be reduced suitably again, to further increase back scattering scanning holes
6 scanning angular region.
When X-ray beam in the transmission scan slot 7 on 2 circumference of collimator by exporting, transmission detectors 16 are in work
State obtains the transmission signal of measured object 15 and is sent to transmission image processing software, and backscatter detector 14, which is in, at this time closes
Closed state；When X-ray beam is exported by the back scattering scanning holes 6 on 2 circumference of collimator, backscatter detector 14 is in work
State obtains the backscatter signal of measured object 15 and is sent to backscatter images processing software, and transmission detectors 16 are at this time
Closed state；Do not stop to rotate by collimator 2, beam is from the transmission scan slot 7 and back scattering scanning holes 6 in collimator 2
Middle alternately to export, the acquisition transmission at transmission detectors 16 and the interval of backscatter detector 14 and backscatter signal form transmission number
According to column and back scattering data column, transmission data column and back scattering data column reconstruct the transmission and back scattering for generating measured object 15 respectively
Image.The visual effect of transmission image can be kept not reduce using the scanner of the utility model, while generated with preferable
The backscatter images of signal-to-noise ratio and resolution ratio.It, can be with since an X-ray machine is used only in X-ray transmission and back scattering imaging system
It effectively reduces equipment volume and reduces cost.
X-ray source (X-ray tube 5) is fixed on inside scanner by fixed platform 8, and shell can be by unwanted X-ray screen
It covers inside scanner.Collimator 2 and scanner fixed platform shell 1 are made of cupro lead, it is possible to use high strength steel
Shell processed is collectively formed with lead screen internal layer.X-ray source is enclosed in inside by collimator 2 and scanner fixed platform shell 1, can
With by most unwanted alpha ray shields inside scanner.For enhance function of shielding, the big opening end of the collimator 2 or
The big opening end of fixed platform shell 1 is provided with shielding enhancing structure.Specifically, the shielding enhancing structure includes convenient for overlap joint
Shielding trench.In use, (shielding trench is set to for fixed platform shell 1 (when shielding trench is set in collimator 2) or collimator 2
When on fixed platform shell 1) it is inserted into corresponding shielding trench, 2 position of fixed platform shell 1 and collimator on the ray direction of propagation
Upper formation mutually overlaps, to realize maximum X-ray shield ability.
As shown in figure 4, X-ray is by forming the output of linear rays beam after the transmission scan slot 7 on 2 circumference of collimator when,
Transmission detectors 16 are in running order, and backscatter detector 14 is in close state.
As shown in figure 5, X-ray is by forming linear beam output after the back scattering scanning holes 6 on 2 circumference of collimator
When, backscatter detector 14 is in running order, and transmission detectors 16 are in close state.
As shown in fig. 6, collimator 2 rotates a circle, X-ray from 2 circumference of collimator transmission scan slot 7 and back scattering sweep
It retouches in hole 6 and alternately exports, measured object 15 is scanned.Transmission detectors 16 and backscatter detector 14 are spaced accordingly simultaneously
Work receives transmission and backscatter signal.In 2 one swing circles of collimator, t1, t3, t5 moment, in transmission scan slot 7
There is X-ray output, transmission detectors 16 are in running order at this time, receive transmission signal, and backscatter detector 14, which is in, closes
State；There is X-ray output in t2, t4, t6 moment, back scattering scanning holes 6, backscatter detector 14 is in work shape at this time
State, receives backscatter signal, and transmission detectors 16 are in close state.
The linear scanning beam of transmission and back scattering imaging can be obtained using the scanner of the utility model first and back dissipates
The spot scan beam penetrated.Secondly it can make X-ray transmission and back scattering imaging system that an X-ray machine be used only, thus effectively
Reduce equipment volume, reduces system cost.Furthermore transmission and back scattering imaging system can be made while obtaining transmission and back scattering figure
Picture.Under conditions of not reducing transmission image visual effect, preferable backscatter images are obtained.
Obviously, it is practical without departing from this can to carry out various modification and variations to the utility model by those skilled in the art
Novel spirit and scope.If in this way, belonging to the utility model claims to these modifications and variations of the present invention
And its within the scope of equivalent technology, then the utility model is also intended to include these modifications and variations.
Claims (9)
1. a kind of scanner for X-ray transmission and back scattering integral imaging system, it is characterised in that: including X-ray tube (5),
Fixed platform shell (1) and collimator (2)；The fixed platform shell (1) and collimator (2) connection；The X-ray tube (5) is stretched
Enter fixed platform shell (1) installation；The circumferential direction of the collimator (2) is provided with transmission scan slot (7) and back scattering scanning
It hole (6) and can rotate so that the x-ray of the X-ray tube (5) transmitting passes through the transmission scan slot (7) or back scattering scans
Hole (6), or the x-ray interval for emitting the X-ray tube (5) pass through the transmission scan slot (7) and back scattering scanning holes
(6)。
2. being used for the scanner of X-ray transmission and back scattering integral imaging system as described in claim 1, it is characterised in that:
The fixed platform shell (1) and collimator (2) are taper, and the two big opening end is opposite to be connected.
3. being used for the scanner of X-ray transmission and back scattering integral imaging system as claimed in claim 2, it is characterised in that:
Collimator (2) the osculum end is provided with inner shaft (9), and the inner shaft (9) is driven by bearing of motor (10) and motor (11)
Dynamic connection is to obtain rotary power.
4. being used for the scanner of X-ray transmission and back scattering integral imaging system as claimed in claim 3, it is characterised in that:
Position sensor (12) are connected on the motor (11).
5. being used for the scanner of X-ray transmission and back scattering integral imaging system as claimed in claim 2, it is characterised in that:
The big opening end of the collimator (2) or the big opening end of fixed platform shell (1) are provided with shielding enhancing structure.
6. being used for the scanner of X-ray transmission and back scattering integral imaging system as claimed in claim 5, it is characterised in that:
The shielding enhancing structure includes convenient for overlapped shielding trench.
7. being used for the scanner of X-ray transmission and back scattering integral imaging system as described in claim 1, it is characterised in that:
The transmission scan slot (7) and the setting of back scattering scanning holes (6) interval, the transmission scan slot (7) and back scattering scanning holes (6)
It is coplanar, and the plane is vertical with the rotation axis of inner shaft (9) of the collimator (2), X-ray tube (5) focus is in the collimation
On the rotation axis of device (2).
8. the scanner as claimed in claim 1 for X-ray transmission and back scattering integral imaging system, feature
Be: collimator (2) interval is provided with 3 transmission scan slots (7) and 3 back scattering scanning holes (6).
9. being used for the scanner of X-ray transmission and back scattering integral imaging system as claimed in claim 8, it is characterised in that:
Transmission scan slot (7) center of circle subtended angle is Δ θ=20 °, and angle is 100 ° between adjacent transmission scan slot (7), and adjacent transmission is swept
The middle position for retouching slot (7) is provided with back scattering scanning holes (6)；The beam that the X-ray tube (5) is formed should be angle considered critical
For the fan-ray beam of Δ φ=50 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821910446.8U CN209215261U (en) | 2018-11-20 | 2018-11-20 | A kind of scanner for X-ray transmission and back scattering integral imaging system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821910446.8U CN209215261U (en) | 2018-11-20 | 2018-11-20 | A kind of scanner for X-ray transmission and back scattering integral imaging system |
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| CN209215261U true CN209215261U (en) | 2019-08-06 |
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| CN201821910446.8U Active CN209215261U (en) | 2018-11-20 | 2018-11-20 | A kind of scanner for X-ray transmission and back scattering integral imaging system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109324069A (en) * | 2018-11-20 | 2019-02-12 | 中国原子能科学研究院 | A kind of scanner for X-ray transmission and back scattering integral imaging system |
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2018
- 2018-11-20 CN CN201821910446.8U patent/CN209215261U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109324069A (en) * | 2018-11-20 | 2019-02-12 | 中国原子能科学研究院 | A kind of scanner for X-ray transmission and back scattering integral imaging system |
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