CN104768315B - Collimator apparatus and double detection CT systems - Google Patents
Collimator apparatus and double detection CT systems Download PDFInfo
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- CN104768315B CN104768315B CN201410009284.0A CN201410009284A CN104768315B CN 104768315 B CN104768315 B CN 104768315B CN 201410009284 A CN201410009284 A CN 201410009284A CN 104768315 B CN104768315 B CN 104768315B
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Abstract
The present invention discloses a kind of collimator apparatus and double detection CT systems.Collimator apparatus includes base, two drive devices being installed on base and two concave shielding slabs being driven by it with window.Shielding slab has the first arm, the second arm and the recess being formed between the first arm and the second arm, and the first brachium is in the second arm.When two recesses of two shielding slabs are relative to be formed an energy and correspond to the detection mouthful of planar array detector, the second arm that the first arm, the second arm of one of shielding slab can respectively with another shielding slab, the first arm contact coordinate；Form a detection that can correspond to linear array detector after two recesses of two shielding slabs mutually stagger, between two the second arms of two shielding slabs to stitch, detection mouth and detection seam are respectively positioned in window.It is easy to operate using the present invention, labor intensity can be reduced, human cost is saved.
Description
Technical field
The present invention relates generally to one kind and utilizes x-ray tomography imaging technique（CT）The device being imaged, is specifically related to
And a kind of collimator apparatus of double detection CT systems with linear array detector and planar array detector.
Background technology
CT is a kind of advanced non-destructive testing technology.Because CT detection feature is not by test specimen material category, shape knot
The factors such as structure influence, and imaging is directly perceived, high resolution, especially shows distinctive advantage in terms of complicated component is checked.CT skills
Art can be with the defects detection of application product（Including crack detection, stomata differentiates, is mingled with detection etc.）, dimensional measurement, structure and close
Spend inspection and the reverse-engineering of distribution.Therefore, in space flight, aviation, weapons, electronics, automobile making, investigation of materials, customs, examine
It is used widely in the fields such as Gu.
General CT system is equipped with a set of detector system such as linear array detector or planar array detector.For being visited using linear array
The CT system of survey device, due to that can add rear collimater before radiographic source outlet plus preceding collimater, linear array detector, is effectively limited
Scattered rays is made, so as to improve the quality of image.Ray is formed by a thin fan-ray beam by forward and backward collimater, from
And the thickness that ray penetrates imaged cross-section after object is reduced, improve vertical cross-section direction（That is Z-direction）Resolution ratio.Typically
Linear array detector CT system scans one layer of time substantially 1~3 minute, if the larger workpiece of one length of scanning, typically
Need several hours or even could complete for several days, greatly reduce the service efficiency of radiographic source.In order to improve the inspection of CT system
Efficiency is surveyed, the selection of some CT systems uses planar array detector.For the CT system using planar array detector, except in ray
Outside source outlet plus preceding collimater, typically also need to carry out necessary shielding to planar array detector, to protect the electricity inside detector
Road system.
Traditional double detection CT systems, typically set two collimaters, one applies to line in radiographic source exit
Array detector, another is applied to planar array detector.But artificial frequent switching collimater is needed during use, this is used
The operating personnel of double detection CT systems bring very big inconvenience, reduce the service efficiency of double detection CT systems.
Above- mentioned information is only used for strengthening the understanding of the background to the present invention, therefore it disclosed in the background section
It can include not constituting the information to prior art known to persons of ordinary skill in the art.
The content of the invention
It is an object of the present invention to overcome above-mentioned the deficiencies in the prior art, there is provided a kind of easy to operate collimation dress
Put；
It is another object of the present invention to provide a kind of double detection CT systems for being provided with collimator apparatus of the present invention.
The additional aspect and advantage of the present invention will be set forth in part in the description, and partly will be from description
It is apparent from, or can the acquistion by the practice of the present invention.
According to an aspect of the present invention, the present invention provides a kind of collimator apparatus, for being visited with planar array detector and linear array
Survey device switching to coordinate, wherein the collimator apparatus includes the base with window, two be installed on the base driving dress
The two concave shielding slabs put and driven respectively by described two drive devices, each shielding slab has the first arm, the
Two arms and the recess being formed between the first arm and the second arm, the first brachium is in the second arm, and the width of second arm is not small
In the width of the window, the spy that an energy corresponds to the planar array detector is formed when two recesses of two shielding slabs are relative
When surveying mouth, the second arm that the first arm, the second arm of one of shielding slab can respectively with another shielding slab, the first arm contact are matched somebody with somebody
Close, institute can be corresponded to by being formed after two recesses of two shielding slabs mutually stagger, between two the second arms of two shielding slabs
The detection seam of linear array detector is stated, the detection mouth and detection seam are respectively positioned in the window.
According to an embodiment of the present invention, wherein, two drive devices are symmetrically arranged on the two opposite sides of the window.
According to an embodiment of the present invention, wherein, the window is circle, and located at the base middle position；Institute
Drive device is stated for motor, the center line of the output shaft of two motors is overlapped, and be located at the vertical diameter of the window same
It is individual in the plane of the window.
According to an embodiment of the present invention, wherein, gear, described two shieldings are installed on the output shaft of the motor
The rack coordinated with gear is separately installed with block.
According to an embodiment of the present invention, wherein, the another side opposite with the shielding slab is provided with the base
Pre-collimated element, the pre-collimated element is set around the window.
According to an embodiment of the present invention, wherein, the pre-collimated element includes being fixed on the cylinder of the base.
According to an embodiment of the present invention, wherein, the pre-collimated element also include be fixed on the cylinder end
There are two light penetrating slits positioned opposite, the light penetrating slit can be corresponding with the detection seam on taper cone barrel, the taper cone barrel.
According to an embodiment of the present invention, wherein, the width of the second arm of the shielding slab is not less than the taper cone barrel
Smallest end internal diameter.
According to an embodiment of the present invention, wherein, the shielding slab includes iron block and being wrapped in outside the iron block
Lead layer.
According to an embodiment of the present invention, wherein, the shielding slab is made up of tungsten-copper alloy material or lead material.
According to an embodiment of the present invention, wherein, the base includes bottom plate and is fixed on enclosing around the bottom plate
Frame, the window is located at the bottom plate, and the drive device and shielding slab are installed on the bottom plate, and positioned at the peripheral frame
It is interior.
According to another aspect of the present invention, the present invention provides a kind of double detection CT systems, including support and installation
In on support be used for produce light ray machine, be installed on the collimator apparatus of the ray machine and be installed on the support and with institute
State collimator apparatus relative planar array detector and linear array detector.Wherein, the collimator apparatus is collimation dress of the present invention
Put.
According to an embodiment of the present invention, wherein, the ray machine is provided with installing port, the pre- standard in the collimator apparatus
The outer contour shape of straight element coincide with the installation mouth-shaped, and can be matched with the installing port.
As shown from the above technical solution, advantages and positive effects of the present invention are：
The collimator apparatus of the present invention includes base, two shielding slabs and two drive devices with window.At two
Under the driving of drive device, two shielding slabs move to form the detection that can apply to planar array detector mouthful and can correspond to described
The detection seam of linear array detector, the ray that two shielding slabs are exported to radiographic source limits so that meet planar array detector and
The use requirement of linear array detector.Therefore, using the collimator apparatus of the present invention, when switching different types of detector, it can lead to
Detection mouth or detection seam required for over-driving device driving shielding slab is formed, handoff procedure need not be carried out manually, therefore this
Invention is easy to operate, can reduce labor intensity, saves human cost, and increase substantially efficiency.
Brief description of the drawings
Its example embodiment is described in detail by referring to accompanying drawing, above and other feature of the invention and advantage will become
It is more obvious.
Fig. 1 is the dimensional structure diagram of collimator apparatus of the present invention, represents the state used cooperatively with line detector；
Fig. 2 is the front view of the collimator apparatus shown in Fig. 1；
Fig. 3 is Fig. 2 left view；
Fig. 4 is 2 top view；
Fig. 5 is the front view of collimator apparatus of the present invention, represents the state used cooperatively with surface detector；
Fig. 6 is 5 left views；
Fig. 7 is top view.
Embodiment
Example embodiment is described more fully with referring now to accompanying drawing.However, example embodiment can be with a variety of shapes
Formula is implemented, and is not understood as limited to embodiment set forth herein；On the contrary, thesing embodiments are provided so that the present invention will
Fully and completely, and by the design of example embodiment those skilled in the art is comprehensively conveyed to.Identical accompanying drawing in figure
Mark represents same or similar structure, thus will omit their detailed description.
Collimator apparatus
Collimator apparatus of the present invention, for coordinating with planar array detector and linear array detector switching, such as present invention collimation dress
Put and can be used for double detection CT systems, and coordinate with the planar array detector in double detection CT systems and linear array detector switching
Use.
Referring to Fig. 1 to Fig. 4 and Fig. 5 to Fig. 7.Fig. 1 to Fig. 4, which represents that collimator apparatus of the present invention coordinates with linear array detector, to be made
State；Fig. 5 to Fig. 7 represents the state that collimator apparatus of the present invention is used cooperatively with planar array detector.
Collimator apparatus of the present invention includes base, two drive devices and two shielding slabs.
Base includes bottom plate 11 and the peripheral frame 12 being fixed on around bottom plate 11.Bottom plate 11 can be a square plate, but not with
This is limited, and it can also be rectangular slab, circular slab etc.；Correspondingly, peripheral frame 12 is square box, rectangle frame, circular frame etc..Bottom
Seat can be made up of light materials such as aluminium, to save cost of material, and mitigate deadweight.
The bottom plate 11 of base is provided with the window of insertion, in one embodiment, and the window can be located at the center of bottom plate 11, when
So can also offset from center position, the shape of window can be circular or other shapes.
Two drive devices are symmetrically arranged on bottom plate 11, and are located at the upper side and lower side of window, two driving dresses respectively
Put and be respectively used to drive two shielding slabs traversing along left and right directions.Certain two drive devices can also be symmetrically arranged on window
Left side and right side, at this moment two drive devices be respectively used to driving two shielding slabs moved along above-below direction.In fact, two
Individual drive device need not can also be symmetrical arranged, and be arranged according to actual conditions such as base shape and site spaces.
Shielding slab is in concave shape, with one first arm 31, one second arm 32 and is formed at the first arm 31 and second
Recess 33 between arm 32, the width of the second arm 32 is more than or equal to the width of window, can shield light.The first of shielding slab
Arm 31 is longer than the second arm 32.Two shielding slabs are symmetrical on bottom plate 11 and are staggeredly arranged up and down, therefore, when two screens
Cover block two recesses 33 mutually stagger after, between two the second arms 32 of two shielding slabs formed one detection seam 100, detection seam
100 shape is consistent with the shape required for linear array detector.Detection seam 100 is located in the window of base, and the detection is stitched
100 can correspond to linear array detector.A square detection mouth 200 is formed when two recesses 33 of two shielding slabs are relative（See figure
5）When, the second arm 32, the first arm 31 that the first arm 31, the second arm 32 of one of shielding slab can respectively with another shielding slab
It is engaged.Mouth 200 is detected to be located in the window of base, and detection mouthful 200 can correspond to planar array detector.Detect mouth 200
Shape it is consistent with the shape required for planar array detector.
Drive device can be motor 20 or other types of power set.Two are symmetrically installed on bottom plate 11
Motor mount 50, motor 20 is arranged in motor mount 50, and the output shaft of motor 20 stretches out motor mount 50.
The center line of the output shaft of two motors 20 overlaps, and with the vertical diameter of window be located at it is same perpendicular to
In the plane of window.In one embodiment, two motors 20 and window are centrally arranged on base.Two motors 20
Output is solid respectively by being respectively mounted a gear 41, shielding slab upper end located above and the shielding slab bottom being located below
Determine a rack 42 engaged with gear 41.Therefore, coordinated by rack-and-pinion, two motors 20 can drive two shielding slabs
Relatively move, so that detection seam 100 or detection mouth 200 are formed between two shielding slabs, to adapt to linear array detector respectively
Or planar array detector.
Above-mentioned shielding slab can be made up of high density material such as tungsten-copper alloy material or lead material.In addition, shielding slab also may be used
To be made from a different material, for example shielding slab includes iron block and the lead layer being wrapped in outside iron block.High density material has stronger
Prevention ray ability, can effectively limit radiation exposure in effective region, preferably play collimater effect.Screen
The optimization of thickness can specifically be carried out in 20mm~100mm according to the energy size of radiographic source by covering the thickness of block.
More than, two motors 20, two shielding slabs and motor mount 50 etc. are respectively positioned in peripheral frame 12, i.e., not higher than enclose
Frame 12, so makes one integral module of the formation of collimator apparatus peripheral frame 12 of the present invention, while peripheral frame 12 can be played to each parts
Protective effect.
In other embodiments, another side opposite with shielding slab on the bottom plate 11 of base is provided with pre-collimated element,
The pre-collimated element is set around window.Pre-collimated element is used to limit light in advance within the specific limits, and its structure can be with
Varied, such as in an embodiment, pre-collimated element includes the cylinder 61 for being fixed on bottom plate 11, further, pre-collimated
Element also includes having two light penetrating slits 621 positioned opposite on the taper cone barrel 62 for being fixed on the end of cylinder 61, taper cone barrel 62, should
Light penetrating slit 621 can be corresponding with detection seam 100, i.e., the center line of light penetrating slit 621 is overlapped with the center line of detection seam 100.Now
The width of second arm of shielding slab is more than or equal to the smallest end internal diameter of taper cone barrel, can shield the light for needing to block.It is this
The pre-collimated element of structure can match with the installing port on the ray machine in double detection CT systems just, facilitate the present invention
Installation of the collimator apparatus on ray machine.Pre-collimated element can also be other structures, at this moment need extra mounting assembly by its
It is installed on ray machine.
The peripheral frame 12 of base may be provided for connecting the interface 70 of peripheral control unit.
Referring to Fig. 1 to Fig. 4 and Fig. 5 to Fig. 7.Collimator apparatus of the present invention is mainly used in double detection CT systems.Work as needs
Using it is double detection CT systems in linear array detector when, start motor 20, pass through the gear 41 being installed on motor output shaft
With the cooperation for the rack 42 being fixedly installed on shielding slab, shielding slab transverse shifting is driven, when two second of two shielding slabs
Motor 20 is closed when a detection seam 100 is formed between arm 32, detection seam 100 may correspond to linear array detector, play collimation
Effect；When needing to use the planar array detector in double detection CT systems, motor 20 is again started up, when the two of two shielding slabs
Individual recess 33 closes motor 20 when forming square detection mouth 200 relatively, detection mouthful 200 is that may correspond to planar array detector, is shielded
Cover block and play shielding action, reduce influence of the scattered rays to planar array detector, useful ray is concentrated on planar array detector
Region where receiving plane, so as to improve the image quality of double detection CT systems.Therefore in the present invention, without manually switching
Collimator apparatus, reduces labor intensity.
Double detection CT systems
The double detection CT systems of the present invention, including support and being installed on support are penetrated for producing the ray machine of light
Source application, the collimator apparatus for being installed on ray machine and it is installed on planar array detector and line on support and relative with collimator apparatus
Array detector.Wherein collimator apparatus is the collimator apparatus that the present invention is stated.
Further, the outer contour shape of the pre-collimated element in collimator apparatus coincide with installing mouth-shaped, can be matched with
It is easy for installation in the installing port, and be conducive to reducing the volume of double detection CT systems.
In double detection CT systems of the present invention, control two shielding slabs to move by rack-and-pinion by motor and form adaptation
In the detection mouth or the detection seam of linear array detector of planar array detector.That is, planar array detector and linear array detection it is frequent
During being used alternatingly, without collimator apparatus is manually switched, therefore, using double detection CT systems of the present invention, improve
The automaticity of equipment, labor intensity is low, easy to use, and efficiency is greatly improved.
The illustrative embodiments of the present invention are particularly shown and described above.It should be understood that the invention is not restricted to institute
Disclosed embodiment, on the contrary, it is intended to cover comprising various modifications in the spirit and scope of the appended claims
And equivalent arrangements.
Claims (13)
1. a kind of collimator apparatus, for coordinating with planar array detector and linear array detector switching, it is characterised in that the collimation dress
Put including：Base with window, two drive devices being installed on the base and respectively by it is described two driving fill
Two concave shielding slabs of driving are put, each shielding slab has the first arm, the second arm and is formed at the first arm and second
Recess between arm, the first brachium is in the second arm, and the width of second arm is not less than the width of the window, when two shieldings
When relative one energy of formation of two recesses of block corresponds to the detection mouthful of the planar array detector, the first of one of shielding slab
Arm, the second arm can respectively with another shielding slab the second arm, the first arm contact coordinate, when two recess phases of two shielding slabs
The detection seam of the linear array detector can be corresponded to by being formed after mutually staggering, between two the second arms of two shielding slabs, described to visit
Survey mouth and detection seam is respectively positioned in the window.
2. collimator apparatus as claimed in claim 1, wherein, it is two relative that two drive devices are symmetrically arranged on the window
Side.
3. collimator apparatus as claimed in claim 2, wherein, the window is circle, and located at the base middle position；Institute
Drive device is stated for motor, the center line of the output shaft of two motors is overlapped, the vertical diameter of the center line and the window
Positioned at same in the plane of the window.
4. collimator apparatus as claimed in claim 3, wherein, gear, described two screens are installed on the output shaft of the motor
Cover the rack for being separately installed with and coordinating with gear on block.
5. collimator apparatus as claimed in claim 1, wherein, the another side opposite with the shielding slab is provided with the base
Pre-collimated element, the pre-collimated element is set around the window.
6. collimator apparatus as claimed in claim 5, wherein, the pre-collimated element includes the cylinder for being fixed on the base.
7. collimator apparatus as claimed in claim 6, wherein, the pre-collimated element also includes being fixed on the cylinder end
There are two light penetrating slits positioned opposite, the light penetrating slit can be corresponding with the detection seam on taper cone barrel, the taper cone barrel.
8. collimator apparatus as claimed in claim 7, wherein, the width of the second arm of the shielding slab is more than the taper cone barrel
Smallest end internal diameter.
9. collimator apparatus as claimed in claim 1, wherein, the shielding slab includes iron block and is wrapped in outside the iron block
Lead layer.
10. collimator apparatus as claimed in claim 1, wherein, the shielding slab is made up of tungsten-copper alloy material or lead material.
11. such as collimator apparatus according to any one of claims 1 to 10, wherein, the base includes bottom plate and is fixed on institute
The peripheral frame around bottom plate is stated, the window is located at the bottom plate, and the drive device and shielding slab are installed on the bottom plate, and
In the peripheral frame.
12. a kind of double detection CT systems, including support and it is installed on support and is used to produce the ray machine of light, is installed on institute
State the collimator apparatus of ray machine and be installed on the support and the planar array detector relative with the collimator apparatus and linear array spy
Survey device, it is characterised in that the collimator apparatus is the collimator apparatus as any one of claim 1~11.
13. double detection CT systems as claimed in claim 12, wherein, the ray machine is provided with installing port, the collimation dress
The outer contour shape of pre-collimated element in putting coincide with the installation mouth-shaped, and can be matched with the installing port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410009284.0A CN104768315B (en) | 2014-01-08 | 2014-01-08 | Collimator apparatus and double detection CT systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410009284.0A CN104768315B (en) | 2014-01-08 | 2014-01-08 | Collimator apparatus and double detection CT systems |
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| Publication Number | Publication Date |
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| CN104768315A CN104768315A (en) | 2015-07-08 |
| CN104768315B true CN104768315B (en) | 2017-10-03 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201868118U (en) * | 2010-11-15 | 2011-06-15 | 东软飞利浦医疗设备***有限责任公司 | X-ray collimator |
| CN102768219A (en) * | 2012-07-26 | 2012-11-07 | 清华大学 | Combined nondestructive testing method and combined nondestructive testing system by utilizing rays |
| CN103337275A (en) * | 2013-06-21 | 2013-10-02 | 东软飞利浦医疗设备***有限责任公司 | CT scanner filter switching device and switching method |
| CN203722905U (en) * | 2014-01-08 | 2014-07-16 | 中国科学院高能物理研究所 | Collimating device and double-detection CT system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090196395A1 (en) * | 2008-06-20 | 2009-08-06 | Gendex Corporation | Cephalometric x-ray imaging apparatus |
-
2014
- 2014-01-08 CN CN201410009284.0A patent/CN104768315B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201868118U (en) * | 2010-11-15 | 2011-06-15 | 东软飞利浦医疗设备***有限责任公司 | X-ray collimator |
| CN102768219A (en) * | 2012-07-26 | 2012-11-07 | 清华大学 | Combined nondestructive testing method and combined nondestructive testing system by utilizing rays |
| CN103337275A (en) * | 2013-06-21 | 2013-10-02 | 东软飞利浦医疗设备***有限责任公司 | CT scanner filter switching device and switching method |
| CN203722905U (en) * | 2014-01-08 | 2014-07-16 | 中国科学院高能物理研究所 | Collimating device and double-detection CT system |
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