CN107544041A - Die body component is tested in magnetic resonance imaging - Google Patents
Die body component is tested in magnetic resonance imaging Download PDFInfo
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- CN107544041A CN107544041A CN201610489511.3A CN201610489511A CN107544041A CN 107544041 A CN107544041 A CN 107544041A CN 201610489511 A CN201610489511 A CN 201610489511A CN 107544041 A CN107544041 A CN 107544041A
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Abstract
The present invention proposes a kind of magnetic resonance imaging test die body component, including several spaced apart modules successively on axial direction (above-below direction), and image quality test of each module for completing one or more magnetic resonance imaging systems, including the first module for testing geometric distortion, first vector including platy structure, the first conduit extended in a first direction is provided with above, the second conduit extended in a second direction, and first conduit, second conduit intersects and forms network, first conduit, the intersection of second conduit is provided with the pass structure extended along third direction.Compared with prior art, test die body provided by the invention can be used in any combination with one or more, multiple to be applied in combination to form so-called integration test die body.Integration test die body in a die body, convenient test, carries each test module organic combination, is also convenient for quality control and quality assurance that hospital carries out magnetic resonance equipment.Integration test die body makes the environment of the solution residing for each test module be unified, has unified test condition, test data is had comparativity.
Description
Technical field
The present invention relates to magnetic resonance imaging arts, and die body component is tested more particularly, to a kind of magnetic resonance imaging.
Background technology
Performance test and quality control (QC) and quality assurance of the die body in magnetic resonance system are tested in magnetic resonance imaging
(QA) have very important effect in, presently, there are miscellaneous magnetic resonance test die body, for different test items and
Method of testing.
In general test die body is often just for a certain specific test item or method of testing, therefore to complete to a certain
The comprehensive assessment of magnetic resonance equipment, generally require to use multiple die bodys, it is all not convenient for testing and carrying, and due to die body
It is not of uniform size, formula is different, and the change of the load brought can also introduce error, or even mistake in test result.Will
Such issues that integration test die body that various test modules combine can solve.
There are United States Medicine physical society (American Association of Physicists at present in the world
Medicine, AAPM) Magphan SMR series die bodys, and the U.S. radiation institute (American College of
Radiology, ACR) ACR MRI phantom die bodys, the two die bodys are all and their respective magnetic resonance testing standards
It is corresponding, but the standard of the two mechanisms is all also complete to introduce the country.
Standard --- the YY/T0482-2010 of the image quality parameter measure of the magnetic resonance equipment of domestic current at present《Doctor
With the measure of imaging magnetic resonance equipment primary picture mass parameter》It is to convert from International Electrotechnical Commission (International
Electrotechnical Commission, IEC) IEC62464-1:2007, mainly measure signal to noise ratio, the uniformity, two dimension
The thickness of scanning, spatial resolution, two-dimensional geometry distortion, ghost this six big parameter, and lack one kind for this standard at present
Or a variety of integrative test die body.
The content of the invention
In order to solve the above problems, the present invention proposes a kind of magnetic resonance imaging test die body component.
Die body component is tested in a kind of magnetic resonance imaging, including several spaced apart moulds successively on axial direction (above-below direction)
Block, and image quality test of each module for completing one or more magnetic resonance imaging systems, including for testing geometry
First module of distortion, include the first vector of platy structure, be provided with above extend in a first direction the first conduit, along second
Second conduit of direction extension, and the first conduit, the second conduit intersect and form network, the first conduit, the second conduit
Intersection is provided with the pass structure extended along third direction.
Preferably, the first direction, second direction are perpendicular.
Preferably, the above and below of the pass structure insertion first vector.
Preferably, first conduit, the width range of the second conduit are 1mm-2mm, depth bounds 5mm-15mm.
Preferably, the third direction is mutually perpendicular to first direction, second direction.
Preferably, size of the grid cell in the network in a first direction, in second direction is identical.
Preferably, including for testing the second module of ghost, second module includes Second support, and described second carries
One or more pass structure is provided with body.
Preferably, the diameter of the pass structure on the Second support is more than or equal to 50mm.
Preferably, including the 3rd module for test space resolving power, the 3rd module includes the 3rd carrier, described
Array of orifices is provided with 3rd carrier.
Preferably, at least 5 groups 4*4 array of orifices is included.
Preferably, the aperture is circular port, a diameter of 0.4mm-2mm of aperture.
Preferably, in addition to for test space resolving power the 4th die body, the 4th die body include the 4th carrier with
And some groups of modules, every group of module are fixedly installed on the 4th carrier.
Preferably, every group of module is equidistant lamellar structure, and the spacing is between 1mm-3mm, the lamella
Thickness for 0.5 between 2mm.
Preferably, in addition to it is used for the 5th die body for testing thickness, the 5th die body includes the 5th carrier and wedge
Shape structure, the wedge structure are fixedly installed on the 5th carrier.
Preferably, including two wedge structures, between the inclined-plane and bottom surface of described two wedge structures angle be 10 °-
12°。
Preferably, in addition to for testing signal to noise ratio and/or the 6th die body of uniformity, the 6th die body includes inside
Region, the interior zone are filled with the solution for being used for producing magnetic resonance signal.
Preferably, the internal diameter of the interior zone of the 6th die body is 180mm-220mm.
Compared with prior art, the test die body of above-mentioned offer can be used in any combination with one or more, multiple groups
Close use and form so-called integration test die body.Integration test die body by each test module organic combination in a die body,
Convenient test, carry, be also convenient for quality control and quality assurance that hospital carries out magnetic resonance equipment.Integration test die body makes each
The environment of solution residing for test module is unified, has unified test condition, test data is had comparativity.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art and advantage, below will be to implementing
The required accompanying drawing used is briefly described in example or description of the prior art, it should be apparent that, drawings in the following description are only
Only it is some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work,
Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation that the present invention is used for magnetic resonance imaging test die body component；
Fig. 2 is the structural representation of the first die body of the present invention；
Fig. 3 is the structural representation of the second die body of the present invention；
Fig. 4 is the structural representation of the 3rd die body of the present invention；
Fig. 5 is the structural representation of the 4th die body of the present invention；
Fig. 6 is the structural representation of the 5th die body of the present invention；
Fig. 7 is the structural representation of the 6th die body of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art obtained on the premise of creative work is not made it is all its
His embodiment, belongs to the scope of protection of the invention.
As shown in figure 1, a kind of magnetic resonance imaging test die body component 900, including it is several on axial direction (above-below direction) according to
The module of minor tick arrangement, and image quality test of each module for completing one or more magnetic resonance imaging systems.
As shown in Fig. 2 the magnetic resonance imaging test die body component 900 includes being used for the first module for testing geometric distortion
10, first die body 10 includes the first vector 101 of platy structure, is provided with the first conduit extended in a first direction above
1011st, the second conduit 1012 extended in a second direction, and the first conduit, the second conduit intersect and form network, it is described
First direction is perpendicular with second direction.In one embodiment, first conduit, the width range of the second conduit are 1mm-
2mm, depth bounds 5mm-15mm.In one embodiment, the grid cell in the network in a first direction, second
Size on direction is identical.The thickness of the carrier is 10mm-30mm.
The pass structure 1013 extended along third direction is provided with the intersection of first conduit, the second conduit.Institute
The above and below of pass structure insertion first vector is stated, the third direction is mutually perpendicular to first direction, second direction.
In actual applications, above-mentioned first die body 10, using processing one on the material for not producing magnetic resonance signal
Chessboard sample square net, the side of grid is half logical groove, and summit is the hole of all-pass, so can clearly be distinguished in scanning
Go out the side and summit of grid, be easy to measure.
As shown in figure 3, the magnetic resonance imaging test die body component 900 includes being used for the second module 20 for testing ghost,
Second module includes Second support 201, is provided with one or more pass structure on the Second support, and described second
The diameter of pass structure on carrier is more than or equal to 50mm.As shown in figure 3, in the present embodiment, set on the Second support
There are 2 pass structures, the pass structure is through hole or non through hole.
As shown in figure 4, the magnetic resonance imaging test die body component 900 includes the 3rd mould for test space resolving power
Block 30, the 3rd module 30 include the 3rd carrier 30 as one kind 1, array of orifices 302 are provided with the 3rd carrier.In an implementation
In example, array of orifices of the 3rd carrier 30 as one kind 1 at least provided with 5 groups of 4*4.In one embodiment, the aperture is circular port,
A diameter of 0.4mm-2mm of aperture.In one embodiment, every group of pitch of holes is equal to hole diameter.
, it is necessary to which the theoretical pixel size of MRI is set smaller than or equal to hole diameter during test, if
Same group can be told in the image of scanning and is separated by two apertures, then thinks that the resolution ratio of the magnetic resonance system is parity with or superiority over
The diameter of this group of aperture.Purpose using square formation is in single pass, measure in two orthogonal directions
Spatial resolution.Method of testing using array of orifices is a kind of very useful method, adds the wide of die body test suite
General applicability.
As shown in figure 5, the magnetic resonance imaging test die body component 900 includes the 4th mould for test space resolving power
Body 40, the 4th die body include the 4th carrier 401 and some groups of modules 402, and every group of module 402 is fixedly installed on institute
State on the 4th carrier 401.Every group of module 402 is equidistant lamellar structure, and in one embodiment, the spacing is
Between 1mm-3mm, the thickness of the lamella is for 0.5 between 2mm.
Above-mentioned for the 3rd die body of test space resolving power and the 4th die body is respectively poroid model, cycle template mould
Type.According to the degree of modules easy bubbles attached in primer solution, and de-bubble instrument is used for convenience, by space
The poroid module and cycle template module of resolution ratio are placed on the position near from water filling port.
As shown in fig. 6, the magnetic resonance imaging test die body component 900 includes being used for the 5th die body 50 for testing thickness,
5th die body 50 includes the 5th carrier 501 and wedge structure 502, and the wedge structure 501 is fixedly installed on described
On five carriers 501.In one embodiment, the 5th die body includes two wedge structures, described two wedge structures it is oblique
Angle is 10 ° -12 ° between face and bottom surface.
As shown in fig. 7, magnetic resonance imaging test die body 900, including for testing the of signal to noise ratio and/or uniformity
Six die bodys 60, the 6th die body 60 include interior zone 601, and the interior zone 601, which is filled with, to be used to produce magnetic resonance letter
Number solution, in one embodiment, the internal diameter of the interior zone of the 6th die body is 180mm-220mm.
Above-mentioned six die bodys, can be used in any combination with one or more, multiple to be applied in combination to form so-called synthesis
Test die body.Each test module organic combination in a die body, convenient test, is carried, is also convenient for by integration test die body
Hospital carries out the quality control and quality assurance of magnetic resonance equipment.Integration test die body makes the solution residing for each test module
Environment is unified, has unified test condition, test data is had comparativity.
Described above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (17)
1. die body component is tested in a kind of magnetic resonance imaging, including several spaced apart moulds successively on axial direction (above-below direction)
Block, and image quality test of each module for completing one or more magnetic resonance imaging systems, it is characterised in that：Including with
In the first module of test geometric distortion, include the first vector of platy structure, be provided with first extended in a first direction above
Conduit, the second conduit extended in a second direction, and the first conduit, the second conduit intersect and form network, the first conduit,
The intersection of second conduit is provided with the pass structure extended along third direction.
2. die body component is tested in magnetic resonance imaging as claimed in claim 1, it is characterised in that the first direction, second party
To perpendicular.
3. die body component is tested in magnetic resonance imaging as claimed in claim 1, it is characterised in that the pass structure insertion first
The above and below of carrier.
4. die body component is tested in magnetic resonance imaging as claimed in claim 1, it is characterised in that first conduit, the second groove
The width range in road is 1mm-2mm, depth bounds 5mm-15mm.
5. die body component is tested in magnetic resonance imaging as claimed in claim 1, it is characterised in that the third direction and first party
It is mutually perpendicular to, second direction.
6. die body component is tested in magnetic resonance imaging as claimed in claim 1, it is characterised in that the grid in the network
Size of the unit in a first direction, in second direction is identical.
7. die body is tested in magnetic resonance imaging as claimed in claim 1, it is characterised in that including the second mould for testing ghost
Block, second module include Second support, one or more pass structure are provided with the Second support.
8. die body component is tested in magnetic resonance imaging as claimed in claim 7, it is characterised in that the pass on the Second support
The diameter of structure is more than or equal to 50mm.
9. die body component is tested in magnetic resonance imaging as claimed in claim 1, it is characterised in that including being differentiated for the test space
3rd module of power, the 3rd module include the 3rd carrier, array of orifices are provided with the 3rd carrier.
10. die body component is tested in magnetic resonance imaging as claimed in claim 9, it is characterised in that includes at least 5 groups of 4*4's
Array of orifices.
11. die body component is tested in magnetic resonance imaging as claimed in claim 9, it is characterised in that the aperture is circular port, small
A diameter of 0.4mm-2mm in hole.
12. die body is tested in magnetic resonance imaging as claimed in claim 1, it is characterised in that also includes being used for test space resolution
4th die body of power, the 4th die body include the 4th carrier and some groups of modules, and every group of module is fixedly installed on institute
State on the 4th carrier.
13. die body is tested in magnetic resonance imaging as claimed in claim 12, it is characterised in that every group of module is equidistant
Lamellar structure, the spacing is between 1mm-3mm, and the thickness of the lamella is for 0.5 between 2mm.
14. die body is tested in magnetic resonance imaging as claimed in claim 1, it is characterised in that also includes being used for testing the of thickness
Five die bodys, the 5th die body include the 5th carrier and wedge structure, and the wedge structure is fixedly installed on the described 5th
On carrier.
15. die body is tested in magnetic resonance imaging as claimed in claim 14, it is characterised in that described including two wedge structures
Angle is 10 ° -12 ° between the inclined-plane and bottom surface of two wedge structures.
16. die body is tested in magnetic resonance imaging as claimed in claim 1, it is characterised in that also include being used for testing signal to noise ratio and/
Or the 6th die body of uniformity, the 6th die body include interior zone, the interior zone, which is filled with, to be used to produce magnetic resonance
The solution of signal.
17. die body is tested in magnetic resonance imaging as claimed in claim 16, it is characterised in that the interior zone of the 6th die body
Internal diameter be 180mm-220mm.
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| CN201610489511.3A CN107544041B (en) | 2016-06-29 | 2016-06-29 | Magnetic resonance imaging test phantom assembly |
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|---|---|---|---|
| CN201610489511.3A CN107544041B (en) | 2016-06-29 | 2016-06-29 | Magnetic resonance imaging test phantom assembly |
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| CN107544041B CN107544041B (en) | 2021-07-16 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108828484A (en) * | 2018-05-25 | 2018-11-16 | 中国计量科学研究院 | A kind of Quality Control die body of magnetic resonance imager |
| CN109009114A (en) * | 2018-08-08 | 2018-12-18 | 北京市计量检测科学研究院 | Three-bearing MR imaging apparatus image property detection device |
| CN109350865A (en) * | 2018-11-26 | 2019-02-19 | 泰山医学院 | A kind of radiotherapy system imagery quality controll body mould of guided by magnetic resonance |
| CN109633504A (en) * | 2018-12-14 | 2019-04-16 | 天津大学 | A kind of compound magnetic resonance test body mould system of static-dynamic state |
| CN109709505A (en) * | 2018-12-27 | 2019-05-03 | 潍坊新力超导磁电科技有限公司 | A kind of moisture film for superconducting magnetic resonance equipment |
| CN109782202A (en) * | 2018-12-14 | 2019-05-21 | 天津大学 | A kind of static state magnetic resonance test body modular system |
| CN109782203A (en) * | 2018-12-14 | 2019-05-21 | 天津大学 | A kind of dynamic magnetic resonance test body mould system |
| CN109856174A (en) * | 2018-12-27 | 2019-06-07 | 潍坊新力超导磁电科技有限公司 | A kind of line is to formula high contrast resolution test component and its fixed device of slide |
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| CN111696047A (en) * | 2019-03-14 | 2020-09-22 | 四川中测辐射科技有限公司 | Imaging quality determination method and system for medical imaging equipment |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07327952A (en) * | 1994-06-09 | 1995-12-19 | Hitachi Ltd | Mri photographing method |
| CN201259533Y (en) * | 2008-09-23 | 2009-06-17 | 王国柱 | A magnetic resonance quality control integrated test phantom |
| CN102478650A (en) * | 2010-11-29 | 2012-05-30 | 邱建峰 | Small-sized desktop type magnetic resonance quality control and comprehensive test phantom |
| CN203149106U (en) * | 2013-01-31 | 2013-08-21 | 上海联影医疗科技有限公司 | Testing device used for magnetic resonance imaging |
| CN103356194A (en) * | 2013-08-03 | 2013-10-23 | 南方医科大学 | Positioning component of multi-parameter testing phantom for magnetic resonance quality control and testing phantom |
| CN203365665U (en) * | 2013-08-03 | 2013-12-25 | 康立丽 | Magnetic resonance quality control multiparameter testing phantom |
| CN203591259U (en) * | 2013-09-24 | 2014-05-14 | 西门子(深圳)磁共振有限公司 | Die body of magnetic resonance imaging system |
| CN203720341U (en) * | 2013-12-09 | 2014-07-16 | Ge医疗系统环球技术有限公司 | Test die and magnetic resonance device |
-
2016
- 2016-06-29 CN CN201610489511.3A patent/CN107544041B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07327952A (en) * | 1994-06-09 | 1995-12-19 | Hitachi Ltd | Mri photographing method |
| CN201259533Y (en) * | 2008-09-23 | 2009-06-17 | 王国柱 | A magnetic resonance quality control integrated test phantom |
| CN102478650A (en) * | 2010-11-29 | 2012-05-30 | 邱建峰 | Small-sized desktop type magnetic resonance quality control and comprehensive test phantom |
| CN203149106U (en) * | 2013-01-31 | 2013-08-21 | 上海联影医疗科技有限公司 | Testing device used for magnetic resonance imaging |
| CN103356194A (en) * | 2013-08-03 | 2013-10-23 | 南方医科大学 | Positioning component of multi-parameter testing phantom for magnetic resonance quality control and testing phantom |
| CN203365665U (en) * | 2013-08-03 | 2013-12-25 | 康立丽 | Magnetic resonance quality control multiparameter testing phantom |
| CN203591259U (en) * | 2013-09-24 | 2014-05-14 | 西门子(深圳)磁共振有限公司 | Die body of magnetic resonance imaging system |
| CN203720341U (en) * | 2013-12-09 | 2014-07-16 | Ge医疗系统环球技术有限公司 | Test die and magnetic resonance device |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108828484A (en) * | 2018-05-25 | 2018-11-16 | 中国计量科学研究院 | A kind of Quality Control die body of magnetic resonance imager |
| CN109009114A (en) * | 2018-08-08 | 2018-12-18 | 北京市计量检测科学研究院 | Three-bearing MR imaging apparatus image property detection device |
| CN109009114B (en) * | 2018-08-08 | 2021-04-23 | 北京市计量检测科学研究院 | Image performance detection device of three-azimuth magnetic resonance imaging equipment |
| CN109350865A (en) * | 2018-11-26 | 2019-02-19 | 泰山医学院 | A kind of radiotherapy system imagery quality controll body mould of guided by magnetic resonance |
| AU2019388593B2 (en) * | 2018-11-26 | 2022-08-11 | Shandong First Medical University & Shandong Academy Of Medical Sciences | Radiotherapy system imaging quality control phantom guided by magnetic resonance |
| WO2020108459A1 (en) * | 2018-11-26 | 2020-06-04 | 山东第一医科大学(山东省医学科学院) | Radiotherapy system imaging quality control phantom guided by magnetic resonance |
| CN109782203B (en) * | 2018-12-14 | 2020-07-31 | 天津大学 | Dynamic magnetic resonance test body model system |
| CN109633504A (en) * | 2018-12-14 | 2019-04-16 | 天津大学 | A kind of compound magnetic resonance test body mould system of static-dynamic state |
| CN109782202A (en) * | 2018-12-14 | 2019-05-21 | 天津大学 | A kind of static state magnetic resonance test body modular system |
| CN109782203A (en) * | 2018-12-14 | 2019-05-21 | 天津大学 | A kind of dynamic magnetic resonance test body mould system |
| CN109633504B (en) * | 2018-12-14 | 2020-05-15 | 天津大学 | Dynamic-static composite magnetic resonance test body model system |
| CN109709505A (en) * | 2018-12-27 | 2019-05-03 | 潍坊新力超导磁电科技有限公司 | A kind of moisture film for superconducting magnetic resonance equipment |
| CN109856174B (en) * | 2018-12-27 | 2020-01-31 | 潍坊新力超导磁电科技有限公司 | line pair type high contrast resolution testing assembly and slide fixing device thereof |
| CN109856174A (en) * | 2018-12-27 | 2019-06-07 | 潍坊新力超导磁电科技有限公司 | A kind of line is to formula high contrast resolution test component and its fixed device of slide |
| CN111696047A (en) * | 2019-03-14 | 2020-09-22 | 四川中测辐射科技有限公司 | Imaging quality determination method and system for medical imaging equipment |
| CN111696047B (en) * | 2019-03-14 | 2023-08-22 | 四川中测辐射科技有限公司 | Imaging quality determining method and system of medical imaging equipment |
| WO2020229003A1 (en) * | 2019-05-10 | 2020-11-19 | MRI-STaR - Magnetic Resonance Institute for Safety, Technology and Research GmbH | Test body for analysing and monitoring the image quality from mr tomographs |
| US11933872B2 (en) | 2019-05-10 | 2024-03-19 | MRI-STaR—Magnetic Resonance Institute for Safety, Technology and Research GmbH | Test body for analyzing and monitoring the image quality of MR tomographs |
| CN111257816A (en) * | 2020-04-07 | 2020-06-09 | 江苏力磁医疗设备有限公司 | Gel mold and preparation method and application thereof |
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Address after: 201807 No. 2258 Chengbei Road, Jiading Industrial Zone, Jiading District, Shanghai. Applicant after: Shanghai Lianying Medical Technology Co., Ltd Address before: 201807 No. 2258 Chengbei Road, Jiading Industrial Zone, Jiading District, Shanghai. Applicant before: SHANGHAI UNITED IMAGING HEALTHCARE Co.,Ltd. |
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