CN107462850A - Gradient coil assembly - Google Patents
Gradient coil assembly Download PDFInfo
- Publication number
- CN107462850A CN107462850A CN201610389254.6A CN201610389254A CN107462850A CN 107462850 A CN107462850 A CN 107462850A CN 201610389254 A CN201610389254 A CN 201610389254A CN 107462850 A CN107462850 A CN 107462850A
- Authority
- CN
- China
- Prior art keywords
- gradient coil
- shimming
- coil assembly
- protuberance
- cooling component
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- 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
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- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
The invention discloses a kind of gradient coil assembly, including the main part with host cavity, the shimming hole for being arranged on main part and axially extending, the shimming hole is used to accommodate shimming element, also include the cooling component being arranged in juxtaposition with shimming hole, the cooling component includes supporting body, the body being arranged on supporting body；Cooling component and shimming bar disposed adjacent in the present invention, it can ensure that shimming piece is not influenceed by gradient coil temperature change, and then ensure the stable and uniform in magnetic field, stable image quality by directly being cooled down to shimming bar.
Description
【Technical field】
The present invention relates to mr imaging technique field, more particularly to a kind of gradient line for magnetic resonance imaging
Coil assembly.
【Background technology】
Magnetic resonance imaging needs the magnetic field with high intensity and high uniformity, and this magnetic field is generally by superconduction or resistance
Property coil electromagnet provide.At present, although the design to magnet system has put into great effort to cause it
High intensity uniform field can be produced.However, it is designed go out magnet system still can not in actual applications
Produce the magnetic field of substantially uniformity.Main cause have it is following some:Manufacturing tolerance inevitably make coil from its
Design attitude is offset, and the characteristic of used electric wire likely differs from the characteristic assumed in design process；
In addition, when magnet is arranged on operationlocation, its producible magnetic field will be affected by the ambient, lifts
For example, in hospital environment, the structure of building usually contains structural steel, and neighbouring miscellaneous equipment will
Influence magnet system finally caused field.For those reasons, reality is corrected using shimming (shimming)
Field and the deviation of design field, improve actual field, so that actual field is more nearly design field.Known two types
Shimming：Active shimming and passive shimming.Active shimming refers to the increase shimming body coil in magnet system,
By adjusting the electric current in shimming body coil so that it produces the magnetic field for the field for influenceing magnet system on the whole.
Passive shimming is related to places multi-disc magnetic material (being typically steel) so that true field deforms in magnetic field so that
It is closer to being similar to designed magnetic field.
In the magnet system for imaging, many coils carry electric currents are to produce high intensity and relatively uniform
Magnetic field.This can be described as home court or ambient field.In addition, it is necessary to gradient fields, axial direction of the gradient fields along home court
Intensity be varied from, and not be uniform.Generally, gradient coil be arranged in main field coil footpath it is inside
In the tubular space in portion.A kind of known gradient coil assembly includes being embedded in potting material (such as resin)
In wire.In addition, gradient coil assembly is additionally provided with some shimming holes axially extended, some shimming pieces
It is installed in shimming hole.The shimming hole of gradient coil assembly is corresponding even by being set in advance in die cavity
Field bar mould, after encapsulating shaping, shimming bar mould is taken out, you can obtain.Shimming piece is by magnetic material
Plates made of material.It is corresponding even by being increased or decreased in shimming hole under common environment temperature
The quantity of field piece, you can obtain a satisfactory magnetic field.However, after gradient coil operation, coil
Itself heat can be produced, cause the temperature of shimming piece to rise, stabilization, the uniformity in magnetic field can be influenceed, and then
Influence picture quality.
【The content of the invention】
The technical problems to be solved by the invention are to provide a kind of improved gradient coil assembly, and are arranged at
Shimming bar in it can be cooled down more effectively.
The present invention is as follows to solve the technical scheme that above-mentioned technical problem uses：A kind of gradient coil assembly,
It is described even including the main part with host cavity, the shimming hole for being arranged on main part and axially extending
Field hole is used to accommodate shimming element, in addition to the cooling component being arranged in juxtaposition with shimming hole, the cooling component
Including supporting body, the body being arranged on supporting body.
Preferably, the cooling component, shimming element are arranged in the axle centered on the axis of host cavity
On the face of cylinder.
Preferably, the gradient coil assembly includes several shimming holes and cooling component, the shimming hole,
Cooling component arranged for interval.
Preferably, the cooling component is together with main part shaping.
Preferably, the supporting body is strip, and the both sides of the supporting body set accepting groove, described
Body is fixed in accepting groove.
Preferably, the upper interior lateral margin of institute's accepting groove, lower interior lateral margin be provided with relative extension the first protuberance,
Second protuberance.
Preferably, the body is wound in the accepting groove, and by the first protuberance, the second protuberance
Pre-determined bit.
Preferably, the left inside lateral margin of institute's accepting groove, Right Inboard edge be provided with extend opposite to each other the 3rd protuberance,
4th protuberance, and the 3rd protuberance, the 4th protuberance contact with body.
Preferably, the cooling component includes tabular supporting body, some groups be arranged on tabular supporting body
Setting element and some groups of bodys through setting element.
Preferably, the setting element includes two groups of locating slots on above-below direction, and the body passes through
Wear locating slot.
Present invention contrast prior art has following beneficial effect：Cooling component and shimming bar in the present invention
Disposed adjacent, by directly being cooled down to shimming bar shimming piece can be ensured not by gradient coil temperature change
Influence, and then ensure magnetic field stable and uniform, stable image quality.
【Brief description of the drawings】
Fig. 1 is the side view of gradient coil assembly of the present invention；
Fig. 2 is profile of the gradient coil assembly along A-A directions in Fig. 1；
Fig. 3 is the structural representation of cooling component；
Fig. 4 is the enlarged drawing of Fig. 3 front view；
Fig. 5 is the structural representation of bearing part；
Fig. 6 is the structural representation of another cooling component；
Fig. 7 is the schematic diagram that shimming bar mould is arranged in cooling component；
Fig. 8 is the structural representation of setting element；
Fig. 9 is shimming bar structural representation；
Figure 10 is the structural representation of superconducting magnet component.
【Embodiment】
The invention will be further described with reference to the accompanying drawings and examples.
Refer to Fig. 1-5 and Fig. 9-10, the gradient coil assembly 4 in the embodiment of the present invention one is to be used for magnetic
The part of the magnet system of resonance image-forming, gradient coil assembly 4 are installed in the inner side of main magnet 8,
And both are substantially coaxially arranged.Gradient coil assembly 4 in the embodiment of the present invention includes：It includes cylindrical shape
Wall portion (main part) 41 and formed host cavity 42 is surrounded by wall portion 41.In the circumference of wall portion 41
It is upper that several shimming holes 411 are set, and shimming hole 411 is along the rear end from the front end of gradient coil to gradient coil
Direction extension.Further, two or more shimmings can be assembled at one or in several shimming holes 411
Component (shimming part, shimming bar) 1.
Gradient coil assembly 4 includes some coils by metallic conductor coiling and (is used to produce X, Y, Z side
To gradient fields) and the main part that is formed of the resin material that is molded over above coil.
Further, gradient coil assembly 4 also includes the cooling component 5 being arranged in juxtaposition with shimming hole 411,
The cooling component 5 includes supporting body 50, the body 52 being arranged on supporting body 50.
Supporting body 50 is strip structure, and its length is slightly shorter than the axial length of gradient coil assembly 4.Hold
Carrier 50 is made up of insulating rigid material, such as epoxy plate.The cross section of supporting body 50 can be " H "
Type or " work " type.The left and right sides of supporting body 50 is provided with the accepting groove 51 extended along longitudinally, institute
Body 52 is stated to be fixed in accepting groove 51.The pars intermedia of supporting body 50 is provided with along the logical of longitudinally extension
Hole 53, in the present embodiment, including two through holes 53 being set up in parallel in the vertical direction, in other implementations
In example, a through hole can also be only set.
The upper and lower surface of supporting body 50 can be the arc surface or indent of plane or evagination
Arc surface.In addition, the both sides of supporting body 50 are additionally provided with several breach 54, breach 54 and accepting groove
51 connections.
Upper interior lateral margin, the lower interior lateral margin of accepting groove 51 are provided with the first protuberance 511, second of relative extension
Protuberance 512.The left inside lateral margin of accepting groove 51, Right Inboard edge be provided with extend opposite to each other the 3rd protuberance 513,
4th protuberance 514.Body 52 is flexible pipe, and the optional scope of diameter is 4mm-10mm, preferably a diameter of 6mm.
Body 52 is wound in the accepting groove 51.In the present embodiment, body 52 is in accepting groove 51 by winding
Four circles (circle), and positioned at inner side two circle bodys first by the first protuberance 511, the second protuberance 512 with
Pre-determined bit after 3rd protuberance 513, the clamping of the 4th protuberance 514.Body 52 has entrance point 521, gone out
Mouth end 522, and the entrance point 521, the port of export 522 are located at homonymy, in other embodiments, two
Person can also be located at heteropleural.Further, when positioned at homonymy, the entrance point 521, the port of export 522
On different horizontal planes.
During assembling, cooling component 5, shimming mould are first arranged in the axle centered on the axis of host cavity 42
The face of cylinder on, then will carry out encapsulating, and make the wall portion (main body of cooling component 5 and gradient coil assembly 4
Portion) 41 shapings are together.Breach 54 can be easy to colloid to enter in the accepting groove 51 of cooling component 5, make
Gradient coil assembly has preferable integrally-built stability.Subsequently, shimming mould is removed, formation pair
The shimming hole 411 answered.
Refer to Fig. 6-8, the cooling component 6 in another embodiment of the present invention, including supporting body 60, cloth
The body 62 and setting element 63 being placed on supporting body 60.
Supporting body 60 is soft board, and it can surround and be arranged at gradient coil periphery, the size of its fore-and-aft direction with
Axial length compared with gradient coil assembly 4 is slightly less, the size of its left and right directions preferably with by circular gradient
The outer peripheral face of coil is roughly the same.
The body 52 of body 62 and previous embodiment can be will not be repeated here with identical.
Setting element 63 includes the first setting element 631, the second setting element 632, the first setting element
631st, the second setting element 632 stacks together along the vertical direction.First setting element 631 includes strip
The main part 6310 of shape, four locating slots 6311,6312,6313,6314 being arranged on main part 6310.
The upper surface of locating slot 6311-6314 insertion main parts 6310 and front and rear surfaces.Locating slot 6311-6314
Extend along the longitudinal direction, and (length direction of main part 6310) arranged for interval successively in left-right direction.
Second setting element 632 includes the main part 6320 of strip, four be arranged on main part 6320 determine
Position groove 6321,6322,6323,6324.Locating slot 6321-6324 penetrates the upper surface of main part 6320
And front and rear surfaces.Locating slot 6321-6324 extends along the longitudinal direction, and (main part 6320 in left-right direction
Length direction) arranged for interval successively.In other embodiments, the quantity of locating slot can also be two,
Six, seven, eight etc..
Body 62 positions in such a way：
First, it is spaced along the longitudinal direction on supporting body 60 and fixes several first setting elements 631, and the
One setting element 631 aligns successively along the longitudinal direction, then by four body sections 62a, 62b, 62c, 62d
Extend through along the longitudinal direction respectively the first setting element 631 four locating slots 6311,6312,6313,
6314；Then, several second setting elements 632 are individually fixed in on the first setting element 631
Face, such as corresponding first setting element 631, second can be positioned by member by modes such as glue, screws
Part 632 is fixed together along the vertical direction；Again, locating slot 6323 will be placed in after body section 62a bendings
It is interior, it will be placed in locating slot 6324, will be placed in after body section 62c bendings after body section 62b bendings
In locating slot 6321, it will be placed in after body section 62d bendings in locating slot 6322, so that body section
62a, 62b bending transition part and the bending transition part cross arrangement of body section 62c, 62d, pass through this kind
Mode, bending transition part is set to have relatively large radius of curvature, so that body section 62a-62d cooling is situated between
Matter conveying is smooth.
In the present embodiment, the quantity of body section is four, and in other embodiment, its quantity can also be two
It is individual, six, eight etc..
Further, adhesive can be applied in locating slot, be that body section is fixed together with locating slot,
By physical interference mode body section can also be made to be mechanically fixed with locating slot.
Further, multigroup setting element and body can be arranged on supporting body 60, is determined positioned at different
A shimming bar mould 61 is arranged between two groups of bodys on bit unit.The body section of difference group can be connected
It is joined together to form one or more cooling circuits.
It will be positioned over after the bending of supporting body 60 outside gradient coil, process for filling colloid then carried out, by supporting body
60th, body 62, setting element 63 are taken shape on gradient coil, after then shimming bar mould 61 is removed,
Corresponding shimming hole is formed, for accommodating shimming bar, the body 62, can be with adjacent to corresponding shimming hole
Shimming bar is cooled down.
Cooling component in the present invention and shimming bar disposed adjacent, can by directly being cooled down to shimming bar,
Ensure that shimming piece is not influenceed by gradient coil temperature change, and then ensure the stable and uniform in magnetic field, image matter
Amount is stable.The present invention is when assembling gradient coil, you can so that shimming cooling component is arranged in gradient coil
Portion, rear encapsulating form an entirety, and the present invention is simple in construction, easy to operation, be not take up exceptional space, no
Increase gradient coil thickness, gradient coil original function and structure are not destroyed.
Although the present invention is disclosed as above with preferred embodiment, so it is not limited to the present invention, any
Those skilled in the art, without departing from the spirit and scope of the present invention, when a little modification and perfect can be made,
Therefore protection scope of the present invention is worked as and is defined by what claims were defined.
Claims (10)
1. a kind of gradient coil assembly, including the main part with host cavity, be arranged on main part and
The shimming hole axially extended, the shimming hole are used to accommodate shimming element, it is characterised in that：Also include with
The cooling component that shimming hole is arranged in juxtaposition, the cooling component include supporting body, the pipe being arranged on supporting body
Body.
2. gradient coil assembly as claimed in claim 1, it is characterised in that the cooling component, even
Field element is arranged in centered on the axis of host cavity on the face of cylinder of axle.
3. gradient coil assembly as claimed in claim 1, it is characterised in that the gradient coil assembly
Including several shimming holes and cooling component, the shimming hole, cooling component arranged for interval.
4. gradient coil assembly as claimed in claim 1, it is characterised in that the cooling component and master
Body portion is molded together.
5. gradient coil assembly as claimed in claim 1, it is characterised in that the supporting body is strip
Shape, and the both sides of the supporting body set accepting groove, the body is fixed in accepting groove.
6. gradient coil assembly as claimed in claim 5, it is characterised in that the upper inner side of institute's accepting groove
Edge, lower interior lateral margin are provided with the first protuberance, the second protuberance of relative extension.
7. gradient coil assembly as claimed in claim 6, it is characterised in that the body is wound in institute
State in accepting groove, and by the first protuberance, the second protuberance pre-determined bit.
8. gradient coil assembly as claimed in claim 7, it is characterised in that the left inside side of institute's accepting groove
Edge, Right Inboard edge are provided with the 3rd protuberance, the 4th protuberance extended opposite to each other, and the 3rd protuberance, the 4th
Protuberance contacts with body.
9. gradient coil assembly as claimed in claim 1, it is characterised in that the cooling component includes
Tabular supporting body, some groups of setting elements being arranged on tabular supporting body and through some of setting element
Group body.
10. gradient coil assembly as claimed in claim 9, it is characterised in that the setting element bag
Two groups of locating slots on above-below direction are included, the body runs through locating slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610389254.6A CN107462850B (en) | 2016-06-02 | 2016-06-02 | Gradient coil assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610389254.6A CN107462850B (en) | 2016-06-02 | 2016-06-02 | Gradient coil assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107462850A true CN107462850A (en) | 2017-12-12 |
| CN107462850B CN107462850B (en) | 2020-09-22 |
Family
ID=60545548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610389254.6A Active CN107462850B (en) | 2016-06-02 | 2016-06-02 | Gradient coil assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107462850B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109494041A (en) * | 2018-11-27 | 2019-03-19 | 上海联影医疗科技有限公司 | Superconducting magnet and the magnetic resonance imaging system for using the superconducting magnet |
| CN110244244A (en) * | 2019-03-29 | 2019-09-17 | 上海联影医疗科技有限公司 | Cooling device and magnetic resonance system for magnetic resonance system |
| US11766954B2 (en) | 2017-09-29 | 2023-09-26 | Crrc Zhuzhou Locomotive Co., Ltd. | Control method and system of neutral section passing of multi-locomotive short broke trains |
| 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 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101226232A (en) * | 2007-01-17 | 2008-07-23 | 株式会社东芝 | Gradient magnetic field coil unit, gantry for mri apparatus, and mri apparatus |
| US20130038328A1 (en) * | 2008-10-03 | 2013-02-14 | Toshiba Medical Systems Corporation | Magnetic resonance imaging apparatus and gradient coil cooling control method |
| CN203149103U (en) * | 2013-01-15 | 2013-08-21 | 上海联影医疗科技有限公司 | Gradient coil assembly and shimming strip mold |
| EP2887088A1 (en) * | 2013-12-17 | 2015-06-24 | Samsung Electronics Co., Ltd | Magnetic resonance imaging apparatus with a gradient coil unit including a shim tray |
| CN105091656A (en) * | 2014-05-15 | 2015-11-25 | 孙惠芳 | Heat exchange pipe positioning device and heat exchanger |
-
2016
- 2016-06-02 CN CN201610389254.6A patent/CN107462850B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101226232A (en) * | 2007-01-17 | 2008-07-23 | 株式会社东芝 | Gradient magnetic field coil unit, gantry for mri apparatus, and mri apparatus |
| JP2008194449A (en) * | 2007-01-17 | 2008-08-28 | Toshiba Corp | Gradient magnetic field coil unit, gantry for mri apparatus, and mri apparatus |
| US20130038328A1 (en) * | 2008-10-03 | 2013-02-14 | Toshiba Medical Systems Corporation | Magnetic resonance imaging apparatus and gradient coil cooling control method |
| CN203149103U (en) * | 2013-01-15 | 2013-08-21 | 上海联影医疗科技有限公司 | Gradient coil assembly and shimming strip mold |
| EP2887088A1 (en) * | 2013-12-17 | 2015-06-24 | Samsung Electronics Co., Ltd | Magnetic resonance imaging apparatus with a gradient coil unit including a shim tray |
| CN105091656A (en) * | 2014-05-15 | 2015-11-25 | 孙惠芳 | Heat exchange pipe positioning device and heat exchanger |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11766954B2 (en) | 2017-09-29 | 2023-09-26 | Crrc Zhuzhou Locomotive Co., Ltd. | Control method and system of neutral section passing of multi-locomotive short broke trains |
| CN109494041A (en) * | 2018-11-27 | 2019-03-19 | 上海联影医疗科技有限公司 | Superconducting magnet and the magnetic resonance imaging system for using the superconducting magnet |
| CN110244244A (en) * | 2019-03-29 | 2019-09-17 | 上海联影医疗科技有限公司 | Cooling device and magnetic resonance system for magnetic resonance system |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107462850B (en) | 2020-09-22 |
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Address after: 201807 Shanghai city Jiading District Industrial Zone Jiading Road No. 2258 Patentee after: Shanghai Lianying Medical Technology Co., Ltd Address before: 201807 Shanghai city Jiading District Industrial Zone Jiading Road No. 2258 Patentee before: SHANGHAI UNITED IMAGING HEALTHCARE Co.,Ltd. |
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