CN108469444A - Metal injection molded two-dimensional ct X ray two-dimensional collimators and preparation method thereof - Google Patents
Metal injection molded two-dimensional ct X ray two-dimensional collimators and preparation method thereof Download PDFInfo
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- CN108469444A CN108469444A CN201810557544.6A CN201810557544A CN108469444A CN 108469444 A CN108469444 A CN 108469444A CN 201810557544 A CN201810557544 A CN 201810557544A CN 108469444 A CN108469444 A CN 108469444A
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 51
- 239000002184 metal Substances 0.000 title claims abstract description 51
- 238000002347 injection Methods 0.000 title claims abstract description 36
- 239000007924 injection Substances 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 239000000843 powder Substances 0.000 claims abstract description 16
- 239000011230 binding agent Substances 0.000 claims abstract description 10
- 238000001746 injection moulding Methods 0.000 claims abstract description 10
- 239000002002 slurry Substances 0.000 claims abstract description 10
- 238000013461 design Methods 0.000 claims abstract description 6
- 238000004026 adhesive bonding Methods 0.000 claims abstract description 5
- 238000012937 correction Methods 0.000 claims abstract description 5
- 238000000465 moulding Methods 0.000 claims abstract description 5
- 239000000758 substrate Substances 0.000 claims description 12
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims description 4
- 239000011733 molybdenum Substances 0.000 claims description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052721 tungsten Inorganic materials 0.000 claims description 4
- 239000010937 tungsten Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 description 4
- 239000000523 sample Substances 0.000 description 4
- 238000002591 computed tomography Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005251 gamma ray Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000002603 single-photon emission computed tomography Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
- G01N23/046—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material using tomography, e.g. computed tomography [CT]
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/06—Diaphragms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
- B22F3/225—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip by injection molding
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/03—Investigating materials by wave or particle radiation by transmission
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/30—Accessories, mechanical or electrical features
- G01N2223/316—Accessories, mechanical or electrical features collimators
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- Engineering & Computer Science (AREA)
- Pathology (AREA)
- General Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Medical Informatics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Surgery (AREA)
- Veterinary Medicine (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
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- High Energy & Nuclear Physics (AREA)
- Animal Behavior & Ethology (AREA)
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
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Abstract
The invention discloses metal injection molded two-dimensional ct X-ray two-dimensional collimators and preparation method thereof：It is made of several collimator elements 1, the preparation method of the metal injection molded two-dimensional ct X-ray two-dimensional collimator of the present invention includes the following steps：S1：Prepared by slurry, prepare metal powder, metal powder is made to the slurry of injectable using organic gluing；S2：Injection moulding, designs metal injection molded mold, and monolithic or one layer of collimator element are injection moulded using metal injection molding machine；S3：Overlapping member, the collimator element that overlapping is manufactured by S2 to required the piece number；S4：The two-dimensional collimator component being overlapped is put into binder, is bonded by molding bonded, forms two-dimensional collimator idiosome；S5：Above-mentioned two-dimensional collimator idiosome is put into constant temperature oven, cures entire collimator according to the curing characteristics of binder by baking and curing；S6：Dimension correction is modified the physical size of two-dimensional collimator, completes whole preparation process.
Description
Technical field
The present invention relates to CT equipment technical field more particularly to metal injection molded two-dimensional ct X ray two-dimensional collimators
And preparation method thereof.
Background technology
Needed in CT system to reach detector X-ray be effectively separated so that its accurately reflect leading member at
Picture, in order to reach this purpose, X-ray collimator is used and is given birth to, can be reduced using X ray collimators because stray radiation is to adjacent
The interference of pixel, to improve image image quality.Due to being detected the complexity of object structure and composition ingredient, it is very difficult to resonable
By the upper influence for eradicating scattering, collimator is improved after generally use, another aspect, in practical applications rear collimator
Often determine the detecting window size of each probe unit in CT detector arrays, single-element detector window size is smaller, more advantageous
In the spatial resolution for improving CT systems.
In large-scale CT, detector array is often made of thousands of road probe units, and rear collimator mostly uses two-dimensional collimation
Mode, to eliminate the interference of the scattered photon in all directions, still, for array imaging detectors, two-dimensional collimator
Not only to consider the collimation for single channel probe unit and shielding, to consider the mutual crosstalk between adjacent detector unit, add
Work make with it is difficult in material selection, generally use increases neighboring collimator pitch of holes simultaneously in conjunction with collimator entirety micro-creep
Mode come realize complete data acquire, so that CT scan is more complicated, the CT scan time is multiplied.Currently, not having also in the world
There is a company that there is ideal two-dimensional ct collimator, PHILIP has the two-dimensional collimator focused, but its cost is very high, general
Electric corporation also has the two-dimensional collimator of oneself, cost also to remain high, it is difficult to meet the needs of large-scale production.Two-dimensional collimation
Device development ＆ production cost superelevation, there are no the two-dimensional collimators that oneself is developed for domestic medical company, and it is ready-made to place hope on purchase
Two-dimensional collimator, with the system support with them.
Invention content
Goal of the invention：Two-dimensional collimator processing and fabricating to be solved by this invention, material selection difficulty are big, and R＆D costs are high
The technical issues of with production technology vacancy, the present invention provide metal injection molded two-dimensional ct X rays two-dimensional collimator and its system
Preparation Method.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：Metal injection molded two-dimensional ct X rays
Two-dimensional collimator, including：It is made of several collimator elements.
Wherein, the collimator element includes：Part substrate, link block, rat tail, round bump, circular groove, institute
The both ends for stating substrate element are equipped with link block, and the middle side of the part substrate is equipped with rat tail, and the upper end of the link block is set
There are round bump, the lower end of the link block to be equipped with circular groove.
Wherein, the round bump is connected with circular groove.
Wherein, the upper end spacing of the rat tail（h）Less than lower end spacing（H）.
Wherein, the width of the link block（L）Become smaller from bottom to top.
Wherein, the lower end spacing of the rat tail（H）With under special circumstances with the width of link block（L）Size can one
It causes.
The present invention also provides the preparation method of metal injection molded two-dimensional ct X ray two-dimensional collimators, including it is following
Step：S1：Prepared by slurry, prepare metal powder, metal powder is made to the slurry of injectable using organic gluing；
S2：Injection moulding, designs metal injection molded mold, and monolithic or one layer are injection moulded using metal injection molding machine
Collimator element；
S3：Overlapping member, the collimator element that overlapping is manufactured by S2 to required the piece number；
S4：The two-dimensional collimator component being overlapped is put into binder, is bonded by molding bonded, forms two-dimensional collimator
Idiosome；
S5：Above-mentioned two-dimensional collimator idiosome is put into constant temperature oven by baking and curing, will be entire accurate according to the curing characteristics of binder
Straight device is cured；
S6：Dimension correction is modified the physical size of two-dimensional collimator, completes whole preparation process.
Further, metal powder is one kind in tungsten or molybdenum in the S1.
The invention has the advantages that：
（1）Under low temperature preparation process, it is only necessary to by metal powder and bond the mixed object of adhesive, metal powder need not be melted
Solution, therefore simple process and low cost；
（2）The line thickness of two-dimensional collimator depend on metal injection mold design size, generally can in 0.1-0.2mm,
The preparation requirement of collimator can be met；
（3）It is injection moulded sample surfaces smoother, does not need the polishing process in later stage；
（4）Preparation efficiency is high, equipment input cost is low, therefore the cost for preparing two-dimensional collimator is also relatively low；
（5）This two-dimensional collimator could be applicable to the application scenario of high-energy ray, such as x light, gamma ray neutron, beta rays
Deng detection；
（6）This two-dimensional collimator can be applied to large-sized activity-sensing equipment, such as large-scale Medical Instruments, such as CT, monochromatic light
Sub- emission computed tomography（SPECT）And safety check CT etc..
Description of the drawings
Fig. 1 is the structural representation of the collimator element of the metal injection molded two-dimensional ct X ray two-dimensional collimators of the present invention
Figure.
Fig. 2 is the structural representation of the collimator element of the metal injection molded two-dimensional ct X ray two-dimensional collimators of the present invention
Figure.
Fig. 3 is the partial structural diagram of Fig. 2.
Fig. 4 is the structural representation of the collimator element of the metal injection molded two-dimensional ct X ray two-dimensional collimators of the present invention
Figure.
Fig. 5 is the stereoscopic schematic diagram of the two-dimensional collimator of the present invention.
In figure：1, collimator element, 11, part substrate, 12, link block, 13, rat tail, 14, round bump, 15, circle
Connected in star.
Specific implementation mode
It is further elaborated below in conjunction with attached drawing and by specific embodiment to the present invention, it should be pointed out that：For this technique
For the common process personnel in field, without departing from the principle of the present invention, to repairing for various equivalent forms of the invention
Change and falls within the application range as defined in the appended claims.
Embodiment 1
As shown in Figs. 1-3, metal injection molded two-dimensional ct X ray two-dimensional collimators, including：By several collimator elements 1
Composition.
Wherein, the collimator element 1 includes：Part substrate 11, link block 12, rat tail 13, round bump 14, circle
The both ends of connected in star 15, the substrate element 11 are equipped with link block 12, and the middle side of the part substrate 11 is equipped with rat tail 13,
The upper end of the link block 12 is equipped with round bump 14, and the lower end of the link block is equipped with circular groove 15.
Further, the round bump 14 is connect with circular groove cooperation 15.
Further, the upper end spacing of the rat tail 13（h）Less than lower end spacing（H）.
Further, the width of the link block 12（L）Become smaller from bottom to top.
It is described（H）Size it is consistent with the pixel size of detector.
It is described（L）Size it is consistent with the pixel size of detector.
The preparation method of the metal injection molded two-dimensional ct X ray two-dimensional collimators of the present embodiment, includes the following steps：
S1：Prepared by slurry, prepare metal powder, metal powder is made to the slurry of injectable using organic gluing；
S2：Injection moulding, designs metal injection molded mold, and monolithic or one layer are injection moulded using metal injection molding machine
Collimator element；
S3：Overlapping member, the collimator element that overlapping is manufactured by S2 to required the piece number；
S4：The two-dimensional collimator component being overlapped is put into binder, is bonded by molding bonded, forms two-dimensional collimator
Idiosome；
S5：Above-mentioned two-dimensional collimator idiosome is put into constant temperature oven by baking and curing, will be entire accurate according to the curing characteristics of binder
Straight device is cured；
S6：Dimension correction is modified the physical size of two-dimensional collimator, completes whole preparation process.
Further, metal powder is one kind in tungsten or molybdenum in step S1.
Embodiment 2
As shown in figure 4, metal injection molded two-dimensional ct X ray two-dimensional collimators, including：By 1 group of several collimator elements
At.
Wherein, the collimator element 1 includes：Part substrate 11 and rat tail 13, the middle side of the part substrate 11
Equipped with rat tail 13.
Wherein, the upper end spacing of the rat tail 13（h）Less than lower end spacing（H）.
It is described（H）Size it is consistent with the pixel size of detector.
Wherein, the width of the rat tail 13 becomes smaller from bottom to top.
Further, the collimator element 11 directly forms the two-dimensional collimator consistent with detector size, two-dimensional collimation
The shape of device is as shown in Figure 5.
In this case, two-dimensional collimator is directly Nian Jie with following detector.
The preparation method of the metal injection molded two-dimensional ct X ray two-dimensional collimators of the present embodiment, includes the following steps：
S1：Prepared by slurry, prepare metal powder, metal powder is made to the slurry of injectable using organic gluing；
S2：Injection moulding, designs metal injection molded mold, and monolithic or one layer are injection moulded using metal injection molding machine
Collimator element；
S3：Overlapping member, the collimator element that overlapping is manufactured by S2 to required the piece number；
S4：The two-dimensional collimator component being overlapped is put into binder, is bonded by molding bonded, forms two-dimensional collimator
Idiosome；
S5：Above-mentioned two-dimensional collimator idiosome is put into constant temperature oven by baking and curing, will be entire accurate according to the curing characteristics of binder
Straight device is cured；
S6：Dimension correction is modified the physical size of two-dimensional collimator, completes whole preparation process.
Further, metal powder is one kind in tungsten or molybdenum in step S1.
In above-described embodiment, the size of L and H can be equal, i.e. the detector pixel of rectangle.
The upper end spacing of two-dimensional collimator rat tail of the present invention（h）Less than lower end spacing（H）, it is consequently formed for ray
The focusing of the Z-direction of point light source, the width of rat tail（L）Become smaller from bottom to top, forms the focusing to ray X-direction.
The preparation method of the metal injection molded two-dimensional ct X ray two-dimensional collimators of the present invention, simple for process, size essence
Really, it is not necessarily to post-processing, production cost is low, there is vast market prospect.
Claims (8)
1. metal injection molded two-dimensional ct X-ray two-dimensional collimator, which is characterized in that including：By several collimator element groups
At.
2. a kind of metal injection molded two-dimensional ct X-ray two-dimensional collimator according to claim 1, which is characterized in that described
Collimator element includes：Part substrate, link block, rat tail, round bump, circular groove, the both ends of the substrate element
Equipped with link block, the middle side of the part substrate is equipped with rat tail, and the upper end of the link block is equipped with round bump, the company
The lower end for connecing block is equipped with circular groove.
3. a kind of metal injection molded two-dimensional ct X-ray two-dimensional collimator according to claim 1, which is characterized in that described
Round bump is connected with circular groove.
4. a kind of metal injection molded two-dimensional ct X-ray two-dimensional collimator according to claim 1, which is characterized in that described
The upper end spacing of rat tail（h）Less than lower end spacing（H）.
5. a kind of metal injection molded two-dimensional ct X-ray two-dimensional collimator according to claim 1, which is characterized in that described
The width of link block（L）Become smaller from bottom to top.
6. according to claim Isosorbide-5-Nitrae, a kind of 5 metal injection molded two-dimensional ct X-ray two-dimensional collimators, which is characterized in that
The lower end spacing of the rat tail（H）With under special circumstances with the width of link block（L）Size can be consistent.
7. according to a kind of preparation method of metal injection molded two-dimensional ct X-ray two-dimensional collimator described in claim 1-6,
It is characterized in that, includes the following steps：
S1：Prepared by slurry, prepare metal powder, metal powder is made to the slurry of injectable using organic gluing；
S2：Injection moulding, designs metal injection molded mold, and monolithic or one layer are injection moulded using metal injection molding machine
Collimator element；
S3：Overlapping member, the collimator element that overlapping is manufactured by S2 to required the piece number；
S4：The two-dimensional collimator component being overlapped is put into binder, is bonded by molding bonded, forms two-dimensional collimator
Idiosome；
S5：Above-mentioned two-dimensional collimator idiosome is put into constant temperature oven by baking and curing, will be entire accurate according to the curing characteristics of binder
Straight device is cured；
S6：Dimension correction is modified the physical size of two-dimensional collimator, completes whole preparation process.
8. the preparation method of metal injection molded two-dimensional ct X ray two-dimensional collimators, feature exist according to claim 6
In metal powder is one kind in tungsten or molybdenum in the S1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810557544.6A CN108469444A (en) | 2018-06-01 | 2018-06-01 | Metal injection molded two-dimensional ct X ray two-dimensional collimators and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810557544.6A CN108469444A (en) | 2018-06-01 | 2018-06-01 | Metal injection molded two-dimensional ct X ray two-dimensional collimators and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN108469444A true CN108469444A (en) | 2018-08-31 |
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| CN201810557544.6A Pending CN108469444A (en) | 2018-06-01 | 2018-06-01 | Metal injection molded two-dimensional ct X ray two-dimensional collimators and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101964217A (en) * | 2009-07-22 | 2011-02-02 | 西门子公司 | Method for producing a 2D collimator element and 2D collimator element |
| US20110158381A1 (en) * | 2009-12-28 | 2011-06-30 | Zhaoping Wu | 2d reflector and collimator structure and method of manufacturing thereof |
| CN102949200A (en) * | 2011-08-26 | 2013-03-06 | 通用电气公司 | Collimator and manufacturing method thereof and special die assembly for manufacturing collimator |
| US20130075630A1 (en) * | 2011-09-26 | 2013-03-28 | Siemens Medical Solutions Usa, Inc. | Collimator for Medical Imaging and Fabrication Method |
-
2018
- 2018-06-01 CN CN201810557544.6A patent/CN108469444A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101964217A (en) * | 2009-07-22 | 2011-02-02 | 西门子公司 | Method for producing a 2D collimator element and 2D collimator element |
| US20110158381A1 (en) * | 2009-12-28 | 2011-06-30 | Zhaoping Wu | 2d reflector and collimator structure and method of manufacturing thereof |
| CN102949200A (en) * | 2011-08-26 | 2013-03-06 | 通用电气公司 | Collimator and manufacturing method thereof and special die assembly for manufacturing collimator |
| US20130075630A1 (en) * | 2011-09-26 | 2013-03-28 | Siemens Medical Solutions Usa, Inc. | Collimator for Medical Imaging and Fabrication Method |
Non-Patent Citations (1)
| Title |
|---|
| 贾辉 等: "二维机械准直器准直光束的衍射", 光学学报, vol. 27, no. 08, pages 1377 - 1381 * |
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Application publication date: 20180831 |