CN206648976U - Transmission-type radiation image-forming system - Google Patents
Transmission-type radiation image-forming system Download PDFInfo
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- CN206648976U CN206648976U CN201720379844.0U CN201720379844U CN206648976U CN 206648976 U CN206648976 U CN 206648976U CN 201720379844 U CN201720379844 U CN 201720379844U CN 206648976 U CN206648976 U CN 206648976U
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Abstract
The utility model discloses a kind of transmission-type radiation image-forming system.Wherein, radiation source is used to launch the radiation beam for imaging to object to be detected, different detector arrays is suitable to be arranged on different positions, for receiving the radiation beam transmitted with different angle from object to be detected, radiation beam modulating device is used to be modulated the radiation beam of radiation emission, to cause radiation source that there are a variety of emission modes, the incident angle or incident angle combination difference of the radiation beam on object to be detected are incided under different emission modes, and the detector array or detector array combination difference of radiation beam are received under different emission modes.Thus, radiation source, which can be combined with different visual angles or visual angle to object to be detected, under the modulating action of radiation beam modulating device launches flying spot beam, to obtain the transmission image of the object to be detected under different visual angles or visual angle combination, so as to improve overlapped object problem present in transmission-type image.
Description
Technical field
Radiographic imaging arts are the utility model is related to, more particularly to a kind of transmission-type radiation image-forming system.
Background technology
The large-scale target such as vehicle and goods is checked using radiant image be comparative maturity safety check technology, according to
Image-forming principle is different, mainly there is transmission-type radiant image and the major class of scattering formula radiant image two.
In general, transmission-type radiation image-forming system is mainly by radiation source, the detector positioned at scanned object opposite side
Composition, radiation source are used to launch flying spot beam to scanned object, and detector is used to receive the spoke from scanned object transmission
Signal is penetrated, received radiation signal reflects the density of illuminated object, the thickness even information such as material, can show object
Internal structure, therefore the transmission image of object to be detected can be formed according to the radiation signal that detector detects.
The transmission image formed based on transmission-type radiant image principle is shown flying spot beam and worn on propagation path
The projection information of saturating all substances, therefore the inspected object on the propagation path of flying spot beam is multiple superposition objects
When, the transmission image formed based on the transmission signal that detector receives can not differentiate the multiple objects to forward lap well.
At present, CT scan technology can be used to solve above-mentioned overlap problem, but for the inspection of this kind of large-sized object of vehicle, is swept using CT
Retouch technical difficulty and cost is high, and inspection is extremely inefficient, practical application sexual valence is than extremely low.
A kind of thus, it is desirable to transmission-type radiation image-forming system that can easily and effectively solve the problems, such as front and rear overlapped object.
Utility model content
Main purpose of the present utility model is to provide a kind of can be detected with different visual angles to object to be detected
Transmission-type radiation image-forming system, to solve the problems, such as front and rear overlapped object present in transmission-type image.
According to one side of the present utility model, there is provided a kind of transmission-type radiation image-forming system, including：Radiation source, use
In launching the radiation beam for imaging to object to be detected；Multiple detector arrays, each detector array include one or more
Individual detector, different detector arrays is suitable to be arranged on different positions, for receiving with different angle from object to be detected
The radiation beam of transmission；And radiation beam modulating device, for being modulated to the radiation beam of radiation emission, to cause radiation source
With a variety of emission modes, wherein, the incident angle of the radiation beam on object to be detected is incided under different emission modes or is entered
Penetrate angle combinations difference, and received under different emission modes radiation beam detector array or detector array combination not
Together.
Preferably, radiation beam modulating device can include：Shield, shield are provided with slit, the spoke of radiation emission
Beam can go out be shot out by slit；Control device, for controlling shield to be rotated around radiation source, make it that it is more that slit has
Individual location status, multiple location status correspond with multiple detector arrays, from the slit outgoing under each location status
The exit direction of radiation beam is substantially perpendicular to the test surface of corresponding detector array, and substantially excessively described detection
The center in face.
Preferably, radiation beam modulating device can include：Shield, shield are provided with multiple detector arrays one by one
Corresponding slit, the radiation beam of radiation emission can go out be shot out by slit, and the radiation beam being emitted from each slit goes out
Penetrate the test surface that direction is substantially perpendicular to corresponding detector array, and the center of substantially excessively described test surface；
Radical occlusion device, for controlling the occlusion state of the radiation beam from the slit outgoing on shield.
Preferably, radical occlusion device can include：Collimater, collimater are provided with one or more collimating slits, pass through movement
Collimater, change the alignment of the slit on the collimating slit and shield in collimater, wherein, from the radiation of radiation source outgoing
Beam can go out to be shot out from the slit in alignment and collimating slit successively.
Preferably, collimater includes one or more fixed parts and one or more movable parts, by mobile one
Or multiple movable parts, formed between one or more movable parts and one or more fixed parts and one on shield
The collimating slit of individual or multiple slit alignments.
Preferably, radical occlusion device can include：Block, by mobile block, control from the slit outgoing on shield
The occlusion state of radiation beam.
Preferably, radiation image-forming system can also include：Collimater, collimater are provided with the slit on shield one by one
Corresponding collimating slit, block are arranged between shield and collimater.
Preferably, radiation image-forming system can also include：Secondary shield, the block both sides are arranged on, for shielding spoke
Beam incides caused scattering radiation beam after the block.
Preferably, under the modulating action of radiation beam modulating device, radiation source has two kinds of emission modes, the first transmitting
It is vertical with the length direction of object to be detected that the incident angle of the first radiation beam on object to be detected is incided under pattern, second
5 °≤α≤10 ° of angle between the second radiation beam on object to be detected and the first radiation beam are incided under kind emission mode.
Preferably, transmission-type radiation image-forming system can also include image processing apparatus, for multiple detector arrays
The radiation beam that middle different detector arrays receive is handled to form the scan image under different visual angles.
Preferably, radiation source can be rotated around predetermined rotating shaft in predetermined angular range, to cause radiation source
The radiation beam suitable for being received by different detector arrays can be launched in rotary course.
Transmission-type radiation image-forming system of the present utility model can cause spoke under the modulating action of radiation beam modulating device
Penetrate source and flying spot beam is launched to object to be detected with different emission modes, wherein, incided under different emission modes tested
It is different to survey incident angle or the incident angle combination of the radiation beam of object, it is possible thereby to obtain object to be detected in different visual angles or
Transmission image under the combination of visual angle, by analyzing the transmission image under different visual angles or visual angle combination, it can tell
The multiple objects to be forward lapped in transmission image.
Brief description of the drawings
Disclosure illustrative embodiments are described in more detail in conjunction with the accompanying drawings, the disclosure above-mentioned and its
Its purpose, feature and advantage will be apparent, wherein, in disclosure illustrative embodiments, identical reference number
Typically represent same parts.
Fig. 1 is the schematic block diagram for the basic structure for showing transmission-type radiation image-forming system of the present utility model.
Fig. 2A to Fig. 2 D is structure and the modulation for showing the radiation beam modulating device under the embodiment of the utility model one
The schematic diagram of process.
Fig. 3 A to Fig. 3 C are the structure and tune for showing the radiation beam modulating device under another embodiment of the utility model
The schematic diagram of process processed.
Fig. 4 A to Fig. 4 C are the structure and tune for showing the radiation beam modulating device under another embodiment of the utility model
The schematic diagram of process processed.
Fig. 5 A to Fig. 5 C are the structure and tune for showing the radiation beam modulating device under another embodiment of the utility model
The schematic diagram of process processed.
Fig. 6 A, Fig. 6 B are structure and the modulation for showing the radiation beam modulating device under another embodiment of the utility model
The schematic diagram of process.
Fig. 7 A to Fig. 7 C are the structure and tune for showing the radiation beam modulating device under another embodiment of the utility model
The schematic diagram of process processed.
Embodiment
The preferred embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although the disclosure is shown in accompanying drawing
Preferred embodiment, however, it is to be appreciated that may be realized in various forms the disclosure without the embodiment party that should be illustrated here
Formula is limited.On the contrary, these embodiments are provided so that the disclosure is more thorough and complete, and can be by the disclosure
Scope is intactly communicated to those skilled in the art.
As it was previously stated, radiation beam, which is shown, in the transmission image that the principle based on transmission-type radiant image is formed is propagating road
The projection information of all substances penetrated on footpath, it is unfavorable for differentiating the multiple objects to forward lap.This is directed to, the utility model
People has found after extensive studies it, can launch flying spot beam to object to be detected with different visual angles, to obtain under different visual angles
Object to be detected transmission image, while the picture quality at each visual angle can not be reduced, safety and environmental protection, can solved well
Overlapped object problem present in transmission-type image.
Based on above-mentioned thinking, the utility model proposes a kind of variable transmission-type radiation image-forming system in visual angle.Lead below
The variable specific implementation of the structure of transmission-type radiation image-forming system of the present utility model and visual angle is illustrated, its
In, image-forming principle, detection process on transmission-type radiation image-forming system are no longer described in detail.
Fig. 1 is the schematic block diagram for the basic structure for showing transmission-type radiation image-forming system of the present utility model.
Referring to Fig. 1, transmission-type radiation image-forming system 100 includes radiation source 1, radiation beam modulating device 2 and multiple detections
Device array 3.
Radiation source 1 is used to launch the radiation beam for imaging to object to be detected.Wherein, radiation beam can be penetrated for gamma
Line, X ray or neutron, correspondingly, radiation source 1 can be that radio isotope, electron accelerator, X-ray production apparatus or neutron occur
Device.Radiation source 1 removes the core that includes for radiation-emitting, and (such as the accelerating tube of electron linear accelerator, electronic induction add
The sourcehead of fast device, the X-ray tube of X-ray production apparatus) outside, the parts such as power supply, the cooling of periphery auxiliary can also be included.On radiation
The concrete structure that source 1 can have is known to those skilled in the art, repeats no more here.
Each detector array 3 can include one or more detectors, and different detector arrays 3 is suitable to be arranged on not
Same position, for receiving the radiation beam transmitted with different angle from object to be detected.
As an alternative embodiment of the present utility model, under the modulating action of radiation beam modulating device 2, radiation source 1
There can be two kinds of emission modes.The incidence of the first radiation beam on object to be detected is wherein incided under the first emission mode
Angle angle can be vertical with the length direction of object to be detected, and second on object to be detected is incided under second of emission mode
There can be certain angle α between radiation beam and the first radiation beam, the size of angle α can be set according to actual conditions, example
Such as 5 °≤α≤10 °.Now, multiple detector arrays can include the first detector array and the second detector array, the first hair
The radiation beam launched under emission mode can be received by the first detector array, and the radiation beam launched under the second emission mode can be by
Second detector receives.
Radiation beam modulating device 2 is used to be modulated the radiation beam that radiation source 1 is launched, make it that it is more that radiation source 1 has
Kind of emission mode, wherein, the incident angle or incident angle of the radiation beam on object to be detected are incided under different emission modes
Combination is different, and the detector array or detector array combination difference of radiation beam are received under different emission modes.Herein
" incident angle " addressed refers to the direction of propagation and object to be detected and the transmission-type spoke for the radiation beam for inciding object to be detected
The angle penetrated between the direction of relative movement between imaging system.
Thus, at the radiation beam received to detector array under different emission modes or detector array set splice grafting
Reason, can obtain transmission image under different emission modes or transmission image combination, transmission image under different emission modes or
Transmission image combination can be considered as the transmission image under different visual angles or visual angle combination.
When carrying out radiant image to object to be detected using transmission-type imaging system 100 of the present utility model, Ke Yili
Radiation source 1 is controlled to irradiate object to be detected with different emission modes with radiation beam modulating device 2, to obtain different visual angles or difference
The transmission image of the lower object to be detected of visual angle combination, so as to improve overlapped object problem present in transmission-type image.
For example, during object to be detected is checked using transmission-type imaging system 100 of the present utility model, Ke Yibao
It is motionless to hold multiple detector arrays 3, first in the presence of radiation beam modulating device 2, control radiation source 1 is with the first emission mode
Launch radiation beam to object to be detected, can be received under the pattern by the first detector array or the first detector array set splice grafting
From the radiation beam of object to be detected transmission, the radiation beam received based on the first detector array or the first detector array set splice grafting
Transmission image or the transmission image combination of formation can be considered as the transmission image under the first visual angle or the combination of the first visual angle.Then may be used
So that in the presence of radiation beam modulating device 2, control radiation source 1 launches radiation beam with the second emission mode to object to be detected,
The radiation from object to be detected transmission can be received under the pattern by the second detector array or the second detector array set splice grafting
Beam, the transmission image formed based on the radiation beam that the second detector array or the second detector array set splice grafting receive or transmission plot
As combination can be considered as the transmission image under the second visual angle or the combination of the second visual angle.Thus, it is possible to object to be detected is obtained not
, can by analyzing the transmission image under different visual angles or visual angle combination with the transmission image under visual angle or visual angle combination
The multiple objects to be forward lapped with telling in transmission image.
Further, since the radiation beam under different emission modes is being launched at different moments, therefore new using this practicality
The transmission-type radiation image-forming system of type obtain different visual angles or visual angle combination under transmission image while, different emission modes it
Between radiation beam will not produce interference, it is ensured that the quality of resulting transmission image.
As an alternative embodiment of the present utility model, transmission-type radiation image-forming system of the present utility model can also wrap
Image processing apparatus is included, the radiation beam for being received to different detector arrays in multiple detector arrays is handled with shape
Scan image under into different visual angles.Specifically, image processing apparatus can include image collection module, image processing module with
And image display.Image collection module can obtain the radiation beam signal of the reception of detector array 3, and image processing module can
Handled with the radiation beam signal obtained to image acquiring device to form the scan image checked for user, image shows mould
The scan image that block can be formed with display image processing unit.Image collection module, image processing module and image display
Any existing known technology in the art can be used, is that those skilled in that art are readily appreciated that, it is no longer detailed here
State.
It should be noted that in the transmission image under showing the multiple emission modes obtained using the utility model, can
It has been shown that, can also be shown on different displays with the different windows in same display, preferably can be aobvious at same
Show that the same window of device is shown, and a variety of 3D such as aberration formula, polarization type, active-shutter or naked eye type can be used
Display mode is shown.
So far the basic structure and operation principle that Fig. 1 schematically illustrates transmission-type radiation image-forming system are combined.According to above
Description to transmission-type radiation image-forming system of the present utility model understands that key point of the present utility model is how to utilize radiation
Beam modulating device 2 controls the angle of flow of the radiation beam of the transmitting of radiation source 1, to form above-mentioned a variety of emission modes.With reference to tool
The concrete structure that body embodiment can have with regard to radiation beam modulating device 2 schematically illustrates, it should be appreciated that the spoke hereafter addressed
The structure of beam modulation device 2 should not be construed as to have hereafter limitation of the present utility model, radiation beam modulating device 2
The other structures form addressed.
Embodiment one
Referring to Fig. 2A, Fig. 2 B, radiation beam modulating device can be made up of shield 4 and control device (not shown).
Wherein, associated description above is can be found on radiation source 1 and detector array 3, repeated no more here.
Shield 4 is provided with slit 41, and the exit direction for the radiation beam that shield 4 is mainly used in launching radiation source 1 is entered
Row constraint so that the radiation beam that radiation source 1 is launched only can go out be shot out by slit 41.Wherein, it is arranged on shield 4
Slit 41 can have certain height and width, can be used for subtended angle of the radiation beam in short transverse that limitation passes through slit 41
And the width on scanning direction (direction of relative movement between transmission-type radiation image-forming system and object to be detected).
Control device can control shield 4 to be rotated around radiation source 1, to cause slit 41 that there are multiple location status, and
And multiple location status correspond with multiple detector arrays.Here the correspondence addressed refers to from narrow under each location status
The radiation beam of seam outgoing can be received by corresponding detector array, i.e. the radiation from the slit outgoing under each location status
The exit direction of beam is substantially perpendicular to the test surface of corresponding detector array, and substantially crosses in test surface
The heart.Thus, a location status can be considered as a kind of emission mode, and the radiation beam being emitted under different location status can be by not
Same detector array receives.
As shown in Figure 2 A, radiation source 1 can be considered as a point source, and control device can control the shield 4 to be with radiation source 1
Center is rotated, and when shield 4 to be rotated to the position shown in figure, the radiation beam 1a launched from radiation source 1 can lead to
Cross slit 41 to go out to be shot out, and received by detector array 3a.And from radiation beam 1b then shielded body 4 that radiation source 1 is launched
Block, can not be received by detector array 3b.
In direction rotating shield 4 shown in the arrow shown along in Fig. 2A, shield 4 is rotated into the position shown in Fig. 2 B
When putting, the radiation beam 1b launched from radiation source 1 can go out be shot out by slit 41, and be received by detector array 3b, and
The radiation beam 1a launched from radiation source 1 then block by shielded body 4, can not be received by detector array 3a.
Thus, rotating shield 4 is passed through, thus it is possible to vary the location status of the slit 41 on shield 4 so that from slit 41
The radiation beam of outgoing can be received by different detector arrays.
Alternatively, shield 4 can be made up of radiation shielding material, can be used for radioactive source shielding 1 transmitting without screen
Cover the radiation beam that the slit 41 on body 4 is emitted, you can for the close rate of shielding unwanted radiation beam leakage.
As shown in Fig. 2 C, 2D, collimater 5 can also be provided with the outside of shield 4.Collimater 5 be provided with shield 4
Slit 41 be aligned collimating slit 51, from shield 4 slit 41 be emitted radiation beam can pass through the collimation in collimater 5
Seam 51 goes out to be shot out.Now, control device can control shield 4 and collimater 5 together to be rotated around radiation source 1, with formation
Multiple location status that text is addressed.
Embodiment two
Radiation beam modulating device can be made up of shield and radical occlusion device.
Unlike the shield in embodiment one, multiple slits can be provided with the shield in the present embodiment, from
The shooting angle of the radiation beam of different slit outgoing is different, and multiple slits correspond with multiple detector arrays.Here pair
It should refer to, the detection of corresponding detector array is substantially perpendicular to from the exit direction of the radiation beam of each slit outgoing
Face, and substantially cross test surface center, with allow never with slit outgoing radiation beam by corresponding detector array
Row receive.
Radical occlusion device can be used for control from the occlusion state of the radiation beam of the slit outgoing on shield.By to never
Radiation beam with slit outgoing is blocked, thus it is possible to vary the distribution of the detector array of radiation beam is received, so as to shape
Into different emission modes.
The structure that can have with regard to radical occlusion device below in conjunction with the accompanying drawings is described further.
1st, radical occlusion device is made up of block
Referring to Fig. 3 A, Fig. 3 B, multiple detector arrays can include the first detector array 3a and the second detector array
3b, two slit 41a and 41b can be provided with shield 4, and slit 41a corresponds to the first detector array 3a, 41b pairs of slit
Should be in the second detector array 3b.
When block 6 is located at the position shown in Fig. 3 A, slit 41a is blocked, can not from the radiation beam 1a of slit 41a outgoing
Received by the first detector array 3a；Slit 41b is not blocked, can be by the second detection from the radiation beam 1b of slit 41b outgoing
Device 3b is received.
When block 6 to be rotated to the position shown in Fig. 3 B, slit 41b is blocked, from the radiation beam 1b of slit 41b outgoing
It can not be received by the second detector array 3b；Slit 41a is not blocked, can be by first from the radiation beam 1a of slit 41a outgoing
Detector 3a is received.
When block 6 to be rotated to the position shown in Fig. 3 C, slit 41a and slit 41b are not blocked, therefore from slit
The radiation beam 1a of 41a outgoing can be received by the first detector 3a, can be by the second detection from the radiation beam 1b of slit 41b outgoing
Device array 3b is received.
Thus, it is possible to by moving block, to control the occlusion state of the radiation beam from the slit outgoing on shield, with
Form different emission modes.
Referring to Fig. 4 A, Fig. 4 B, Fig. 4 C, collimater 5, collimater can also be provided with the side of the remote shield 4 of block 6
5 are provided with and the one-to-one collimating slit (5a, 5b) of slit (41a, 41b) on shield 4.And can also be in block 6
Both sides are provided with secondary shield 7, can be used for radiation-screening beam and incide caused scattering radiation beam after block 6.
As shown in Fig. 4 A, Fig. 4 B, Fig. 4 C, the spoke being emitted from the slit on shield can be controlled by mobile block 6
The occlusion state of beam, to form different emission modes.Wherein, specific move mode may refer to saying for Fig. 3 A to Fig. 3 C
It is bright, repeat no more here.
2nd, radical occlusion device is made up of collimater
One or more collimating slits can be provided with collimater, the standard in collimater can be changed by mobile collimater
The alignment of vertical masonry joint and the slit on radical occlusion device, can be from the collimation in alignment from the radiation beam of radiation source outgoing
Seam and slit go out to be shot out.Wherein, movement described herein can include translation and rotation.
Referring to Fig. 5 A, Fig. 5 B, Fig. 5 C, multiple detector arrays can include the first detector array 3a and the second detector
Array 3b, two slit 41a and 41b can be provided with shield 4, and slit 41a corresponds to the first detector array 3a, slit
41b corresponds to the second detector array 3b.The direction for the radiation beam being emitted from slit 41a is perpendicular to the first detector array 3a's
Test surface, from slit 41b outgoing radiation beam direction perpendicular to the second detector array 3b test surface.
Four collimating slits can be provided with collimater 5, for the ease of distinguishing, are properly termed as the first collimating slit 51a, the second standard
Vertical masonry joint 51b, the 3rd collimating slit 51c, the 4th collimating slit 51d.
The alignment of the collimating slit and the slit on shield 4 in collimater 5 by mobile collimater 5, can be changed,
Form different emission modes.
Specifically, collimater 5 can be moved to the position shown in Fig. 5 A so that the first collimating slit 51a and slit 41a
In alignment, the radiation beam 1a launched from radiation source 1 can go out be shot out from slit 41a and the first collimating slit 51a, by the
One detector array 3a is received.Now, collimated device 5 is hidden after slit 41b outgoing from the radiation beam 1b that radiation source 1 is launched
Gear, the second detector array 3b can not receive radiation beam.Scan pattern under the state is properly termed as the scanning of the first visual angle.
When collimater 5 can also be moved into the position shown in Fig. 5 B so that the second collimating slit 51b and slit 41b is in
Alignment, the radiation beam 1b launched from radiation source 1 can go out be shot out, visited by second from slit 41b and the second collimating slit 51b
Device array 3b is surveyed to receive.Now, collimated device 5 is blocked after slit 41a outgoing from the radiation beam 1a that radiation source 1 is launched, the
One detector array 3a can not receive radiation beam.Scan pattern under the state is properly termed as the scanning of the second visual angle.
When collimater 5 to be moved to the position shown in Fig. 5 C, slit 41a is aligned with the 3rd collimating slit 51c, slit 41b
It is aligned with the 4th collimating slit 51d.The radiation beam 1b now launched from radiation source 1 can go out from slit 41b and the 4th collimating slit 51d
It is shot out, is received by the second detector array 3b.The radiation beam 1a launched from radiation source 1 can collimate from slit 41a and the 3rd
Seam 51c goes out to be shot out, and is received by the first detector array 3a.Scan pattern under the state is properly termed as double-view angle scanning.
Thus, can also be by being provided with one or more collimating slits in collimater 5, by mobile collimater 5, to change
The alignment of collimating slit in collimater 5 and the slit on shield 4, to form different emission modes.
Fig. 6 A, Fig. 6 B show another mobile collimater 5 to change on collimating slit and shield 4 in collimater 5
The schematic diagram of the alignment of slit.
Referring to Fig. 6 A, Fig. 6 B, a collimating slit 51 can be provided with collimater 5, can be changed by rotary collimator 5
The slit being aligned with collimating slit 51, to allow the radiation beam that radiation source 1 is launched to be received by different detector arrays.
Above in association with situation when having illustrated collimater 5 provided with fixed collimating slit.In addition, collimater can also be by
One or more fixed parts and one or more movable parts are formed, can by the one or more movable parts of movement,
Formed between one or more movable parts and one or more fixed parts and be aligned with one or more slits on shield
Collimating slit.
As shown in Figure 7 A, collimater can be made up of (30,31,32) left, center, right three parts, left part 30 and right side
Points 32 be fixed part, and center section 31 is movable part, center section 31 can according to control system part 30 to the left or
Right part 32 moves.When the part 30 to the left of center section 31 is moved and is bonded with it, form image-forming radiation beam 1a and pass through
Collimater seam 31a；On the contrary, as shown in Figure 7 B, when center section 31, part 32 is moved and when being bonded with it to the right, is formed into
The collimating slit 31b passed through as radiation beam 1b.
In addition, as seen in figure 7 c, can also be center section 31 is fixed part, left part 30 and right part 32 are
Movable part, left part 30 and right part 32 can be according to control system orders closer or far from center section 31.Work as left side
When part 30 is away from center section 31, collimating slit 31b can be formed, can be with shape when right part 32 is away from center section 31
Into collimating slit 31a.When forming collimating slit 31a, the first detector array 3a can be caused to receive from slit 41a and collimating slit
The radiation beam 1a of 31a outgoing.When forming collimating slit 31b, can cause the second detector array 3b receive from slit 41b and
The radiation beam 1b of collimating slit 31b outgoing, when forming collimating slit 31a and 31b simultaneously, the first detector 3a and second can make it that
Detector 3b can receive radiation beam.
Finally it should be noted that because different detector arrays is suitable to the radiation beam of reception different angle, therefore it is
Radiation source 1 is enabled to provide the radiation beam of enough angular ranges, the radiation source 1 in the various embodiments described above can be configured to
Rotary structure, i.e. radiation source 1 can be rotated (specific angular range around predetermined rotating shaft in predetermined angular range
Can be set according to actual conditions), to cause radiation source to launch in rotary course suitable for being connect by different detector arrays
The radiation beam received.Specifically setting on rotary structure is known to those skilled in the art, repeats no more here.
For example, the radiation source 1 in the various embodiments described above can be rotated with the axle that overshoot is put in a steady stream, to ensure to radiate
Source radiation beam axis direction can be with detector array used in face.Here radiation source source point is radiation emission imaging spoke
The initial position of beam, as the source point of electron linear accelerator refers to the position for the electron bombardment metallic target for accelerating to complete, imaging use
X ray be approximately point source using the position as source point.
Radiation beam axis direction described above is generally the center position of the radiation beam of radiation emission, wherein for adding
Fast device refers to direction of motion during electron bombardment metallic target.The radiation beam 1a and 1b shown in accompanying drawing 2A~7C is radiation beam in width
The center in direction is spent, when without special instruction, the exit direction of above-described radiation beam, the angle of emergence of described radiation beam
Degree, the incident angle of described radiation beam refer both to direction and the angle at radiation beam width center.
The test surface of detector array described above refers to horizontal stroke of the detector sensitive area on radiation beam width
Section, detector sensitive area is cuboid (it is preferred that size of the detector sensitive area in radiation beam direction under normal circumstances
Much larger than the size of radiation beam width, to improve detection efficient and reduce pel spacing), now detector sensitive area is being just
The plane of incidence to radiation source is test surface.Address above " exit direction of radiation beam is substantially perpendicular to corresponding
The " center " of the test surface of detector array and substantially excessively described test surface, it is intended to ensure that detector radiation-sensitive region is use up
It may be completely covered by radiation beam, to improve detection efficient, this is the common knowledge of this area.
Further, the critical piece (shield, collimater, block etc.) for the radiation beam modulating device addressed above can
To be made preferably by steel, lead, tungsten or alloy containing steel, lead or tungsten or composite.
Above it is described in detail by reference to accompanying drawing according to transmission-type radiation image-forming system of the present utility model.
It is described above each embodiment of the present utility model, described above is exemplary, and non-exclusive, and
And it is also not necessarily limited to disclosed each embodiment.In the case of without departing from the scope and spirit of illustrated each embodiment, for
Many modifications and changes will be apparent from for those skilled in the art.The choosing of term used herein
Select, it is intended to best explain the principle, practical application or the improvement to the technology in market of each embodiment, or lead this technology
Other those of ordinary skill in domain are understood that each embodiment disclosed herein.
Claims (11)
- A kind of 1. transmission-type radiation image-forming system, it is characterised in that including：Radiation source, for launching the radiation beam for imaging to object to be detected；Multiple detector arrays, each detector array include one or more detectors, and different detector arrays is suitable to set Put in different positions, for receiving the radiation beam transmitted with different angle from the object to be detected；AndRadiation beam modulating device, for being modulated to the radiation beam of the radiation emission, to cause the radiation source to have A variety of emission modes, wherein, the incident angle of the radiation beam on the object to be detected is incided under different emission modes or is entered Penetrate angle combinations difference, and received under different emission modes radiation beam detector array or detector array combination not Together.
- 2. transmission-type radiation image-forming system according to claim 1, it is characterised in that the radiation beam modulating device bag Include：Shield, the shield are provided with slit, and the radiation beam of the radiation emission can go out project by the slit Go；Control device, for controlling the shield to be rotated around the radiation source, to cause the slit that there are multiple position shapes State, the multiple location status correspond with the multiple detector array, from the slit outgoing under each location status The exit direction of radiation beam is substantially perpendicular to the test surface of corresponding detector array, and substantially excessively described detection The center in face.
- 3. transmission-type radiation image-forming system according to claim 1, it is characterised in that the radiation beam modulating device bag Include：Shield, the shield are provided with and the one-to-one slit of the multiple detector array, the radiation emission Radiation beam can go out be shot out by the slit, substantially hung down from the exit direction of the radiation beam of each slit outgoing Directly in the test surface of corresponding detector array, and the center of substantially excessively described test surface；Radical occlusion device, for controlling the occlusion state of the radiation beam from the slit outgoing on the shield.
- 4. radiation image-forming system according to claim 3, it is characterised in that the radical occlusion device includes：Collimater, the collimater are provided with one or more collimating slits, by the movement collimater, change the collimater On collimating slit and the shield on slit alignment,Wherein, can go out to project from the slit in alignment and collimating slit successively from the radiation beam of radiation source outgoing Go.
- 5. radiation image-forming system according to claim 4, it is characterised in that the collimater includes one or more fixed Part and one or more movable parts,It is described solid in one or more movable parts and one or more by mobile one or more movable parts Determine to form the collimating slit being aligned with one or more slits on the shield between part.
- 6. radiation image-forming system according to claim 3, it is characterised in that the radical occlusion device includes：Block, by the movement block, control the occlusion state of the radiation beam from the slit outgoing on the shield.
- 7. radiation image-forming system according to claim 6, it is characterised in that also include：Collimater, the collimater is provided with to be set with the one-to-one collimating slit of slit on the shield, the block Between the shield and the collimater.
- 8. radiation image-forming system according to claim 7, it is characterised in that also include：Secondary shield, the block both sides are arranged on, caused scatter radiates after inciding the block for radiation-screening beam Beam.
- 9. transmission-type radiation image-forming system according to claim 1, it is characterised in that in the radiation beam modulating device Under modulating action, the radiation source has two kinds of emission modes,The incident angle that the first radiation beam on the object to be detected is incided under the first emission mode is detected with described The length direction of object is vertical,Incided under second of emission mode between the second radiation beam on the object to be detected and first radiation beam 5 °≤α≤10 ° of angle.
- 10. the transmission-type radiation image-forming system according to any one of claim 1 to 9, it is characterised in that also include：Image processing apparatus, at the radiation beam that is received to different detector arrays in the multiple detector array Manage to form the scan image under different visual angles.
- 11. the transmission-type radiation image-forming system according to any one of claim 1 to 9, it is characterised in that the radiation Source can be rotated around predetermined rotating shaft in predetermined angular range, to cause the radiation source can in rotary course Transmitting is suitable to the radiation beam received by different detector arrays.
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| CN201720379844.0U CN206648976U (en) | 2017-04-12 | 2017-04-12 | Transmission-type radiation image-forming system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020198936A1 (en) * | 2019-03-29 | 2020-10-08 | Shenzhen Xpectvision Technology Co., Ltd. | An image sensor with radiation detectors and a collimator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020198936A1 (en) * | 2019-03-29 | 2020-10-08 | Shenzhen Xpectvision Technology Co., Ltd. | An image sensor with radiation detectors and a collimator |
| US11852760B2 (en) | 2019-03-29 | 2023-12-26 | Shenzhen Xpectvision Technology Co., Ltd. | Image sensor with radiation detectors and a collimator |
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