CN108241134A - A kind of gradient coil using composite material cooling water pipe - Google Patents
A kind of gradient coil using composite material cooling water pipe Download PDFInfo
- Publication number
- CN108241134A CN108241134A CN201810232699.2A CN201810232699A CN108241134A CN 108241134 A CN108241134 A CN 108241134A CN 201810232699 A CN201810232699 A CN 201810232699A CN 108241134 A CN108241134 A CN 108241134A
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- Prior art keywords
- coils
- shielded
- water pipe
- coil
- circle
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- 239000002131 composite material Substances 0.000 title claims abstract description 22
- 239000000498 cooling water Substances 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 abstract description 7
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 5
- 238000002595 magnetic resonance imaging Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000003384 imaging method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
- G01R33/385—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using gradient magnetic field coils
- G01R33/3856—Means for cooling the gradient coils or thermal shielding of the gradient coils
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
- G01R33/3804—Additional hardware for cooling or heating of the magnet assembly, for housing a cooled or heated part of the magnet assembly or for temperature control of the magnet assembly
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/42—Screening
- G01R33/421—Screening of main or gradient magnetic field
- G01R33/4215—Screening of main or gradient magnetic field of the gradient magnetic field, e.g. using passive or active shielding of the gradient magnetic field
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/42—Screening
- G01R33/422—Screening of the radio frequency field
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
The invention discloses a kind of gradient coils using composite material cooling water pipe, including gradient coil main body, the coil main body is from inside to outside successively by radio shielding layer, primary coil portion, water main, shimming space, shield water pipe and shielded coil part composition, the primary coil portion is from inside to outside respectively by x-ray circle, Y coils, Z-line ring layer is stacked, the shielded coil part is from inside to outside respectively by Z shielded coils, composition is laminated in X shielded coils and Y shielded coils, this structure has taken into account X, Y, the balancing performance of Z-line circle, composite material water pipe is used, improve the capacity of heat transmission of cooling system, wherein shimming is spatially located among water-cooling system, it ensure that the stability of shimming material temperature, so as to ensure that magnetic field's regularity.
Description
Technical field：
The invention belongs to MRI gradient coil technical field more particularly to a kind of gradient coils using composite material cooling water pipe.
Background technology：
Gradient coil is MRI（Magnetic resonance imaging, English full name are：Magnetic Resonance Imaging）The core of system
One of component, the main frequency coding realized during MRI scan, phase code and selects layer.
Existing traditional gradient coil structures are to be as cooling duct using hollow Z main coils and Z shielded coils
Reduce the influence of vortex, the bore of coil cannot be excessive, influence heat dissipation effect, is dissipated if met using different connection methods
Heat demand can form excessive connector, increase the probability of leak, while the coil greatest problem is can not to realize water power point
From, it is ensured that the safety of patient must just use deionized water, increase the difficulty and cost of maintenance.Patent is
ZL201420289868.3《A kind of active shielded gradient coil structure》, the structure which proposes is by sacrificing a part of Z-line
The performance of circle improves the heat-sinking capability of gradient coil, but this is designed without considering many difficulty in process in manufacturing process, does not have
Have and consider that demand of the application person for radio shielding and shimming space and the coil based on the structure cause magnetic field homogeneity
Influence.
Invention content：
In view of the above-mentioned problems, the technical problem to be solved in the present invention is to provide a kind of gradient lines using composite material cooling water pipe
Circle.
A kind of gradient coil using composite material cooling water pipe of the present invention, including gradient coil main body, the coil
Main body is from inside to outside successively by radio shielding layer, primary coil portion, water main, shimming space, shielding water pipe and shielded coil portion
It is grouped as, the primary coil portion is stacked from inside to outside by x-ray circle, Y coils, Z-line ring layer respectively, the shielded coil part
From inside to outside respectively by Z shielded coils, X shielded coils and Y shielded coils stacking form, the x-ray circle include the first x-ray circle,
First corresponds to X shielded coils, the second x-ray circle and second corresponds to X shielded coils, the first x-ray circle X shielding lines corresponding with first
Circle is connected by the first connector, and the second x-ray circle X shielded coils corresponding with second are connected by the second connector, and described first
It is connected between corresponding X shielded coils and the second correspondence X shielded coils by third connector, the Y coils are assemblied in x-ray circle just
On the direction of friendship, the Y coils include the first Y coils, the first correspondence Y shielded coils, the 2nd Y coils and second and correspond to Y shieldings
Coil, Y coils connection mode is identical with x-ray circle, and one end of described Z-line circle one end and shielded coil part passes through the 4th connector phase
Connection, and the electric current of Z-line circle and shielded coil part corresponding part is on the contrary, the gradient coil main body innermost layer is additionally provided with one layer
Stainless (steel) wire.
Preferably, the water main and shielding water pipe are composite material cooling water pipe.
Preferably, the water main can be connected by more composite material cooling water pipes in parallel with shielding water pipe and be formed.
Advantageous effect of the present invention：1. a kind of gradient coil using composite material cooling water pipe of the present invention, the coil make
With composite material cooling water pipe, the capacity of heat transmission of cooling system ensure that, wherein main coil water pipe is double in shielded coil part,
It ensure that water main has primary coil portion enough heat-sinking capabilities, water pipe does not have connector inside gradient coil, reduces leakage
The risk of water.
2. a kind of gradient coil using composite material cooling water pipe of the present invention, the loop construction is inside-out to penetrate
Frequency shielded layer, primary coil portion, water main, shimming part, shielding water pipe and shielded coil part, wherein primary coil portion sequence
For X, Y, Z, shielded coil part order is Z, X, Y, and this structure has taken into account the balancing performance of X, Y, Z-line circle, while cooling water
Pipe is located at shimming part both sides, the temperature stability of shimming part is ensure that, so as to ensure that magnetic field's regularity.
Description of the drawings：
For ease of explanation, the present invention is described in detail by following specific implementations and attached drawing.
Fig. 1 is the gradient coil structures schematic diagram cooled down in traditional use by Z-line circle.
Fig. 2 is the gradient coil structures schematic diagram most like with the application.
Fig. 3 is the gradient coil structures schematic diagram of the present invention.
Fig. 4 is the connection diagram of X, Y coil.
Fig. 5 is Z-line circle connection diagram.
Fig. 6 is the sectional view of gradient coil along longitudinal direction；
Fig. 7 is the design result figure of two gradient coil based on the present invention.
In figure：1st, radio shielding layer；2nd, x-ray circle；21st, the first x-ray circle；22nd, the second x-ray circle；3rd, Y coils；4th, Z-line circle；
5th, water main；6th, shimming space；7th, water pipe is shielded；8th, Z shielded coils；9th, X shielded coils；91st, first X shielded coils are corresponded to；
92nd, second X shielded coils are corresponded to；10th, Y shielded coils；11st, imaging region；12nd, the first connector；13rd, the second connector；14th, third
Connector；15th, the 4th connector.
Specific embodiment：
Understand to make the object, technical solutions and advantages of the present invention clearer, below by the specific implementation shown in attached drawing
Example describes the present invention.However, it should be understood that these descriptions are merely illustrative, and it is not intended to limit the scope of the present invention.This
Outside, in the following description, the description to known features and technology is omitted, to avoid idea of the invention is unnecessarily obscured.
As shown in figs. 1-7, a kind of gradient coil using composite material cooling water pipe of the present embodiment, including gradient coil
Main body, gradient coil main body axial section top half structure is as shown in figure 3, lower half portion and its axially symmetric, described line
Main body is enclosed from inside to outside successively by radio shielding layer 1, primary coil portion, water main 5, shimming space 6, shielding water pipe 7 and shielding
Coiler part forms, and the primary coil portion is made of from inside to outside x-ray circle 2, Y coils 3, the stacking of Z-line circle 4 respectively, the screen
It covers coiler part to be made of the stacking of Z shielded coils 8, X shielded coils 9 and Y shielded coils 10 respectively from inside to outside, x-ray circle 2 and Y
Coil 3 is made of two panels main coil and two panels shielded coil, as shown in figure 4, the x-ray circle 2 includes the first x-ray circle 21, the
One corresponds to X shielded coils 91, the second x-ray circle 22 and second corresponds to X shielded coils 92,21 X corresponding with first of the first x-ray circle
Shielded coil 91 is connected by the first connector 12, and the 22 X shielded coils 92 corresponding with second of the second x-ray circle pass through the second connector
13 connections are connected, shape between the first correspondence X shielded coils 21 and the second correspondence X shielded coils 22 by third connector 14
Into a complete x-ray circle 2, by this connection, ensure primary coil portion and corresponding shielded coil portion of electrical current direction phase
Instead, it realizes the shielding action in magnetic field, reduces vortex, the Y coils 3 are assemblied on the direction orthogonal with x-ray circle 2, the Y coils
3, which include the first Y coils, the first correspondence Y shielded coils, the 2nd Y coils and second, corresponds to Y shielded coils, 3 connection mode of Y coils
Identical with x-ray circle 2, Z-line circle 4 and shielded coil part are winding method, as shown in figure 5, described 4 one end of Z-line circle and shielding line
One end of circle part is connected, and the electric current of Z-line circle 4 and shielded coil part corresponding part is on the contrary, institute by the 4th connector 15
It states gradient coil main body innermost layer and is additionally provided with one layer of stainless (steel) wire, realize the shielding to radiofrequency signal, gradient signal is avoided to interfere
To radio frequency reception.Since the structure of the gradient coil involved by the invention fully takes into account gradient performance, the cooling of gradient coil
Ability, the stability in magnetic field and user demand, in addition the gradient coil temperature controlled in full power operation 45 degrees Celsius with
Under, fully meet system requirements.
Specifically, water main 5 and shielding water pipe 7 are composite material cooling water pipe, and foot is provided for gradient coil heat dissipation
The enough capacity of heat transmission.More composite material water pipes may be used in water main 5 and shielding water pipe 7, and use mechanism in parallel, entire line
Circle is final only there are one water inlet, and a water outlet facilitates user to apply.The gradient coil of the present invention has used composite material water
Guan He improves the capacity of heat transmission of cooling system, and wherein shimming space 6 is located among water-cooling system, ensure that shimming material temperature
The stability of degree, so as to ensure that magnetic field's regularity in the imaging region 11 of elliposoidal.The use of composite material, meets ladder
Demand of the coil to heat conduction is spent, the electricity separation of gradient coil is fully achieved, common pure water or distilled water can be used
As refrigerant, without using deionized water, reducing terminal user to the dependence of special material and reducing maintenance cost.It is even
Field is spatially located between two layers of water pipe layer, ensure that the stabilization of shimming iron plate temperature, and then ensure that the field homogeneity of imaging area
Property.
Fig. 7 is the design result of two gradient coil based on the structure, and A is a high field intensity gradient coil, and B is a
Fast Field coil, this two gradient coil is in verification of the different system manufacturers Jing Guo actual imaging.Gradient coil is designing
The gradient performance needed for itself is fully considered in the process and realizes the influence of technique, gradient to system, while should also be special
Pay close attention to the structure and performance of matched magnetic field environment and magnet in ground.
The basic principles, main features and the advantages of the invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (3)
1. a kind of gradient coil using composite material cooling water pipe, it is characterised in that：Including gradient coil main body, the coil
Main body is from inside to outside successively by radio shielding layer, primary coil portion, water main, shimming space, shielding water pipe and shielded coil portion
It is grouped as, the primary coil portion is stacked from inside to outside by x-ray circle, Y coils, Z-line ring layer respectively, the shielded coil part
From inside to outside respectively by Z shielded coils, X shielded coils and Y shielded coils stacking form, the x-ray circle include the first x-ray circle,
First corresponds to X shielded coils, the second x-ray circle and second corresponds to X shielded coils, the first x-ray circle X shielding lines corresponding with first
Circle is connected by the first connector, and the second x-ray circle X shielded coils corresponding with second are connected by the second connector, and described first
It is connected between corresponding X shielded coils and the second correspondence X shielded coils by third connector, the Y coils are assemblied in x-ray circle just
On the direction of friendship, the Y coils include the first Y coils, the first correspondence Y shielded coils, the 2nd Y coils and second and correspond to Y shieldings
Coil, Y coils connection mode is identical with x-ray circle, and one end of described Z-line circle one end and shielded coil part passes through the 4th connector phase
Connection, and the electric current of Z-line circle and shielded coil part corresponding part is on the contrary, the gradient coil main body innermost layer is additionally provided with one layer
Stainless (steel) wire.
2. a kind of gradient coil using composite material cooling water pipe according to claim 1, it is characterised in that：The master
Water pipe and shielding water pipe are composite material cooling water pipe.
3. a kind of gradient coil using composite material cooling water pipe according to claim 1, it is characterised in that：The master
Water pipe can be connected by more composite material cooling water pipes in parallel with shielding water pipe and be formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810232699.2A CN108241134A (en) | 2018-03-21 | 2018-03-21 | A kind of gradient coil using composite material cooling water pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810232699.2A CN108241134A (en) | 2018-03-21 | 2018-03-21 | A kind of gradient coil using composite material cooling water pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108241134A true CN108241134A (en) | 2018-07-03 |
Family
ID=62699059
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810232699.2A Pending CN108241134A (en) | 2018-03-21 | 2018-03-21 | A kind of gradient coil using composite material cooling water pipe |
Country Status (1)
| Country | Link |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111157930A (en) * | 2018-11-07 | 2020-05-15 | 西门子(深圳)磁共振有限公司 | Gradient coil for magnetic resonance imaging device and magnetic resonance imaging device |
| CN112748380A (en) * | 2019-10-29 | 2021-05-04 | 西门子(深圳)磁共振有限公司 | Gradient coil for magnetic resonance imaging device and magnetic resonance imaging device |
| CN113009395A (en) * | 2021-05-24 | 2021-06-22 | 宁波健信核磁技术有限公司 | Gradient coil with parallel structure |
| CN113050005B (en) * | 2019-12-26 | 2024-01-30 | 西门子(深圳)磁共振有限公司 | Gradient coil cooling component and gradient coil |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111157930A (en) * | 2018-11-07 | 2020-05-15 | 西门子(深圳)磁共振有限公司 | Gradient coil for magnetic resonance imaging device and magnetic resonance imaging device |
| CN112748380A (en) * | 2019-10-29 | 2021-05-04 | 西门子(深圳)磁共振有限公司 | Gradient coil for magnetic resonance imaging device and magnetic resonance imaging device |
| CN112748380B (en) * | 2019-10-29 | 2024-03-19 | 西门子(深圳)磁共振有限公司 | Gradient coil for magnetic resonance imaging device and magnetic resonance imaging device |
| CN113050005B (en) * | 2019-12-26 | 2024-01-30 | 西门子(深圳)磁共振有限公司 | Gradient coil cooling component and gradient coil |
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