CN106908746A - Head NMR zeugmatographic imaging equipment and its head gradient coil block - Google Patents
Head NMR zeugmatographic imaging equipment and its head gradient coil block Download PDFInfo
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- CN106908746A CN106908746A CN201510971932.5A CN201510971932A CN106908746A CN 106908746 A CN106908746 A CN 106908746A CN 201510971932 A CN201510971932 A CN 201510971932A CN 106908746 A CN106908746 A CN 106908746A
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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
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Abstract
The present invention discloses a kind of head NMR zeugmatographic imaging equipment.Head NMR zeugmatographic imaging equipment includes：Main magnet, with central cavity；And head gradient coil block, in the central cavity, and main line ring layer including head size, shielding line ring layer and insulating support, the main line ring layer is used for producing main gradient fields to produce the imaging viewing field of a size, the shielding line ring layer is used for producing shielding gradient fields to offset the described main gradient fields outside the head gradient coil block, the insulating support is used for supporting the main line ring layer and the shielding line ring layer, and the shielding line ring layer is sized to can be around the shoulder of patient.The present invention also discloses the head gradient coil block of head NMR zeugmatographic imaging equipment, patients head is scanned and is checked.
Description
Technical field
A kind of relevant MR imaging apparatus of the present invention, more particularly to a kind of head NMR zeugmatographic imaging equipment.
Background technology
Head gradient coil block is widely used to the head of patient imaged.Existing head gradient coil group
Part inserts whole body nuclear magnetic resonance imaging equipment when patients head is scanned.Head gradient coil block is main
Support including main gradient coil, shielded gradient coil and support main gradient coil and shielded gradient coil.
Main gradient coil is used for producing main gradient fields to produce the imaging viewing field of head.Shielded gradient coil is used for producing
It is raw to shield gradient fields to offset the main gradient fields outside head gradient coil block.
The size of support is smaller, such that it is able to be accommodated in whole body nuclear magnetic resonance imaging equipment, and main gradient
Coil and shielded gradient coil are wrapped in closer to the distance on support.So outside head gradient coil block
Main gradient fields it is stronger, therefore shielded gradient coil needs winding support more multi-turn to produce stronger shielding
Gradient fields, so as to be completely counterbalanced by the main gradient fields outside head gradient coil block.Shielded gradient coil is produced
Shielding gradient fields diffuse to imaging viewing field, offset the main gradient fields in imaging viewing field, therefore greatest gradient
Remitted its fury.In order to make up the main gradient fields of counteracting, main gradient coil needs to increase more numbers of turn, such as
This causes overall inductance to increase, and needs further exist for increasing the number of turn of shielded gradient coil and offset main ladder
The main gradient fields that degree coil is produced.The greatest gradient of such main gradient fields reduced again in imaging viewing field is strong
Degree.
Therefore, it is necessary to provide a solution to solve at least one problem mentioned above.
The content of the invention
One aspect of the present invention is to provide a kind of head NMR zeugmatographic imaging equipment.Head NMR zeugmatographic imaging
Equipment includes：Main magnet, with central cavity；And head gradient coil block, positioned at the center cavity
In body, and the main line ring layer including head size, shielding line ring layer and insulating support, the main line ring layer use
To produce main gradient fields to produce the imaging viewing field of a size, the shielding line ring layer is used for producing shielding ladder
To offset the described main gradient fields outside the head gradient coil block, the insulating support is used for branch for degree field
The main line ring layer and the shielding line ring layer are supportted, the shielding line ring layer is sized to can be around trouble
The shoulder of person.
Another aspect of the present invention is to provide a kind of head gradient coil block.Head gradient coil group
Part includes：The main line ring layer of head size, for producing main gradient fields to produce the imaging viewing field of a size；
Shielding line ring layer, for producing shielding gradient fields to offset the master outside the head gradient coil block
Gradient fields, the shielding line ring layer is sized to can be around the shoulder of patient；And insulating support, use
To support the main line ring layer and the shielding line ring layer.
Another aspect of the invention is to provide a kind of head gradient coil block.Head gradient coil group
Part includes：Insulating support, including external diameter and internal diameter；Main line ring layer, positioned at the internal diameter of the insulating support,
For producing main gradient fields, the main line ring layer is sized to can be around the head of patient and so that trouble
The shoulder of person is in the outside of main line ring layer；And shielding line ring layer, positioned at the external diameter of the insulating support, use
To produce shielding gradient fields to offset the described main gradient fields outside the head gradient coil block, the screen
Covering that coil layer is sized to can be around the shoulder of patient.
Brief description of the drawings
It is described for embodiments of the present invention by with reference to accompanying drawing, the present invention may be better understood,
In the accompanying drawings：
Fig. 1 show the generalized section of one embodiment of head NMR zeugmatographic imaging equipment of the present invention；
The main line ring layer and shielding line ring layer that Fig. 2 show head NMR zeugmatographic imaging equipment produce gradient fields
The schematic diagram of one embodiment；
Fig. 3 show the generalized section of another embodiment of head NMR zeugmatographic imaging equipment of the present invention；
Fig. 4 show the generalized section of another embodiment of head NMR zeugmatographic imaging equipment of the present invention；
Fig. 5 show the generalized section of another embodiment of head NMR zeugmatographic imaging equipment of the present invention；
Fig. 6 show the generalized section of another embodiment of head NMR zeugmatographic imaging equipment of the present invention；
Fig. 7 show the generalized section of another embodiment of head NMR zeugmatographic imaging equipment of the present invention.
Specific embodiment
Unless otherwise defined, technical term used herein or scientific terminology should be neck belonging to the present invention
The ordinary meaning that the personage with general technical ability is understood in domain.Present patent application specification and power
" first " " second " and similar word used in sharp claim are not offered as any order, quantity
Or importance, and be used only to distinguish different parts.Equally, " one " or " one " etc.
Similar word does not indicate that quantity is limited yet, but expression has at least one.Unless otherwise noted, " front portion "
The similar word such as " rear portion " " bottom " and/or " top " is only to facilitate illustrate, and be not limited to
One position or a kind of spatial orientation.In addition, the similar word such as " connection " or " connected " is not
For distinguishing the direct or indirect connection between two elements.Certainly, unless otherwise specified, this interelement
Can be with direct or indirect connection.
Fig. 1 show the generalized section of the head NMR zeugmatographic imaging equipment 10 of one embodiment.Head magnetic
Resonance image-forming equipment 10 is used for scanning or checking the head 100 of patient.In the present embodiment, head magnetic is total to
The imaging device 10 that shakes can work independently, without inserting whole body nuclear magnetic resonance imaging equipment in.Head magnetic resonance into
As equipment 10 includes main magnet 12, magnet coil 14 and head gradient coil block 16.
Main magnet 12 supports magnet coil 14 and with the center cavity that can house head gradient coil block 16
Body 18.More typically, main magnet 12 is cylindrical shape.Magnet coil 14 is used for producing along central cavity 18
Length direction and Z-direction magnetic field.Magnet coil 14 can be housed in the tank body of low temperature to keep
Magnet coil 14 is under superconducting temperature.
Head gradient coil block 16 is located in central cavity 18.In one embodiment, head gradient
Coil block 16 is fixed in central cavity 18, and head gradient coil block 16 is difficult from central cavity
Removed in 18.In another embodiment, head gradient coil block 16 is removably inserted into center cavity
In body 18.Head gradient coil block 16 is sized to head gradient coil block 16 can be substantially
Ply in the centre whole spaces of cavity 18.
Gradient coil assembly 16 includes main line ring layer 22, the shielding line ring layer of head size (Head-sized)
24 and for supporting the insulating support 26 of main line ring layer 22 and shielding line ring layer 24.Main line ring layer 22 is used
Come the imaging viewing field (Field-of-View, FOV) 30 for producing main gradient fields to produce a size." head is big
It is small " represent that size is slightly larger than head.Main line ring layer 22 is sized to main line ring layer 22 and can surround patient
Head 100 and cause patient shoulder 200 outside main line ring layer 22.Main line ring layer 22 is as much as possible
Near the head 100 of patient, the width of the diameter slightly larger than patients head 100 of main line ring layer 22.It is spherical
Imaging viewing field it is slightly bigger than head 100.
Main line ring layer 22 includes the X-axis gradient main (not shown) of winding insulating support 26, Y-axis ladder
Degree main coil (not shown) and Z axis gradient main (not shown).Z axis gradient main can be right
Claim structure, or unsymmetric structure.Main coil can by the winding of conductive line, rod or plate or
Coil shape is cut into be formed.Main line ring layer 22 is located at the internal diameter of insulating support 26.In one embodiment,
Main line ring layer 22 can include multilayer X-axis gradient main (not shown), Y-axis gradient main (not
Diagram) and/or Z axis gradient main.
Shielding line ring layer 24 is used for producing shielding gradient fields to offset the master outside head gradient coil block 16
Gradient fields.Shielding line ring layer 24 is sized to can be around the shoulder 200 of patient.Shielding line ring layer 24
Diameter and the shoulder breadth of patient with diameter greater than main line ring layer 22.On the length direction of insulating support 26
Shielding line ring layer 24 is more long than main line ring layer 22.In one embodiment, shielded coil in the longitudinal direction
Layer 24 is grown to cut down or avoid the main gradient fields of the generation of main line ring layer 22 to main magnetic as main magnet 12
The influence of body 12 and magnet coil 14.Shielding line ring layer 24 may extend to patients head in the longitudinal direction
And shoulder, in one embodiment, so whole body.Shielding line ring layer 24 is in main magnet 12 and master
Shielding is formed between coil layer 22.
In the present embodiment, shielding line ring layer 24 is located at the external diameter of insulating support 26, and main line ring layer is located at
The internal diameter of insulating support 26.It is spaced very between shielding line ring layer 24 and main line ring layer 22 in diametric(al)
Big distance.In one embodiment, the spacing between shielding line ring layer 24 and main line ring layer 22 is not small
In 8 centimetres.In a typical embodiment, the spacing is between about 8 centimetres and about 28 centimetres.
Typically, the diameter of main line ring layer 22 is about 44 centimetres, and the diameter of shielding line ring layer 24 is about
74 centimetres, the spacing between shielding line ring layer 24 and main line ring layer 22 is of about 15 centimetres.Shielding line
Spacing, the diameter of main line ring layer 22 and shielding line ring layer 24 between ring layer 24 and main line ring layer 22
Diameter can be adjusted according to the demand of user.
Shielding line ring layer 24 includes X-axis gradient shield coil (not shown), the Y of winding insulating support 26
Axial gradient shielded coil (not shown) and Z axis gradient shield coil (not shown).Z axis gradient shield line
Circle can be symmetrical structure, or unsymmetric structure.Shielded coil can by conductive line,
Rod or plate wind or are cut into coil shape and formed.In one embodiment, X-axis gradient coil folds to be formed
X-axis gradient main and X-axis gradient shield coil, and/or Y-axis gradient coil fold to form Y-axis ladder
Degree main coil and Y-axis gradient shield coil.
The support main line of insulating support 26 ring layer 22 and shielding line ring layer 24.Insulating support 26 is arranged on master
In the central cavity 18 of magnet 12, the external diameter of insulating support 26 meets central cavity 18 and causes insulation branch
Frame 26 can take up the substantially all space of central cavity 18.Insulating support 26 is sized to can be with
The head 100 and shoulder 200 of patient are accommodated, in one embodiment, so that whole body.At one
In embodiment, the length of insulating support 26 is substantially equal to the length of main magnet 12.In one embodiment,
Insulating support 26 is cylindrical shape.In one embodiment, insulating support 26 includes inner chamber 28, inner chamber 28
With the first internal diameter 36 and the internal diameter of ratio first that patient's shoulder 200 can be housed that can house patients head 100
36 the second big internal diameters 38.First internal diameter 36 is head size, and it is slightly larger than head 100, and main coil
Layer 22 is formed on the first internal diameter 36 of insulating support 26.In the illustrated embodiment, insulating support 26
With insulating support 26 patient end 34 formed otch 32 so that formed the second internal diameter 38 and
Hierarchic structure is formed between first internal diameter 36 and the second internal diameter 38, to adapt to the shape of shoulder 200.
In another embodiment, form multiple hierarchic structures in patient end 34 to adapt to the shape of shoulder 200.
Insulating support 26 includes one or more insulating materials, such as glass fibre.In one embodiment,
Insulating support 26 further contains at least one in sound dampening material and shock material.At one
In embodiment, insulating support 26 contains sound dampening material, for example some foaming kind materials and flexible resin,
The noise that absorbable coil is produced.In another embodiment, insulating support 26 contains shock material,
Such as some foaming kind materials and flexible resin, can absorb vibration, reduce amplitude.In further embodiment
In, insulating support 26 contains sound dampening material and shock material, and sound dampening material and vibration hinder
Damping material can be two kinds of materials, or a kind of while have the material of acoustic damping and vibration damping,
Such as rubber, some foaming kind materials and flexible resin.In one embodiment, acoustic damping material and/or
Shock material can be blended in insulating materials with graininess.
Fig. 1 only shows an example of head NMR zeugmatographic imaging equipment 10.Fig. 1 only shows that head magnetic is total to
Shake the subelement of imaging device 10, head NMR zeugmatographic imaging equipment 10 is also included except the unit shown in Fig. 1
Other elements outside part, such as radio frequency (Radio Frequency, RF) coil.Radio-frequency coil is arranged on
The inner side of head gradient coil block 16 produces radio-frequency pulse.
The main line ring layer 22 and shielding line ring layer 24 that Fig. 2 show head NMR zeugmatographic imaging equipment 10 are produced
The schematic diagram of one embodiment of gradient fields.Main gradient fields 40 shown in figure are main gradient coil layer 22
The gradient coil of generation, shielding gradient fields 42 are the gradient coil that shielding line ring layer 24 is produced.Further away from
Main line ring layer 22, the amplitude of main gradient fields 40 is greatly reduced.Further away from shielding line ring layer 24, shielding ladder
The amplitude for spending field 42 is obviously reduced.Because the interval between main line ring layer 22 and shielding line ring layer 24 is larger,
Therefore the main gradient fields 40 that the main line ring layer 22 at shielded coil 24 and main field 12 is produced are weaker,
Such shielding line ring layer 24 is designed as that corresponding weaker shielding gradient fields 42 can be produced to offset main magnet
Main gradient fields 40 at 12, to minimize influence of the main line ring layer 22 to main magnet 12.Shielding line ring layer
24 can have the less number of turn to produce weaker shielding gradient fields 42.And, shielding gradient fields 42 exist
Substantially weaken at imaging viewing field 30, the shielding gradient fields 42 at this can be offset by main gradient fields 40, because
This main line ring layer 22 offsets the shielding gradient fields 42 at imaging viewing field 30 by increasing the less number of turn.Cause
This, the overall inductance reduction of head gradient coil block 16, the negative influence reduction to imaging viewing field 30.
In this way, the gradient field strength of main gradient fields 42 and switching rate are improved.
Fig. 3 show the generalized section of the head NMR zeugmatographic imaging equipment 10 of another embodiment.Fig. 3
Shown head NMR zeugmatographic imaging equipment 10 is similar with the head NMR zeugmatographic imaging equipment 10 shown in Fig. 1.
The head NMR zeugmatographic imaging equipment 10 shown in Fig. 1 is compared to, the head NMR zeugmatographic imaging shown in Fig. 3 sets
Standby 10 insulating support 26 has the otch 44 of taper type, opening outside insulating support 26 in patient end 34
Mouth is bigger than the opening in insulating support 26, and there is such insulating support 26 larger receiving space to accommodate
The shoulder and arm of patient.Fig. 1 and Fig. 3 only show the example of the structure of unrestricted insulating support 26,
In certain embodiments, insulating support 26 can provide shoulder of the big space to patient with other structures
Portion, arm, even whole body.
Fig. 4 show the generalized section of the head NMR zeugmatographic imaging equipment 10 of another embodiment.Fig. 4
Shown head NMR zeugmatographic imaging equipment 10 is similar with the head NMR zeugmatographic imaging equipment 10 shown in Fig. 1.
The head NMR zeugmatographic imaging equipment 10 shown in Fig. 1 is compared to, the head NMR zeugmatographic imaging shown in Fig. 4 sets
Standby 10 have more main line ring layers 50.The main line ring layer 50 is supported by insulating support 26, is used
To produce main gradient fields.Main line ring layer 22 and 50 produces main gradient fields jointly, improves the strong of main gradient fields
Degree.Main line ring layer 50 has interval near main line ring layer 22 between shielding line ring layer 24.One
In individual embodiment, the interval is not less than 8 centimetres.The shielding gradient fields that shielding line ring layer 24 is produced also are offset
The main gradient fields outside head NMR zeugmatographic imaging equipment 10 that main line ring layer 50 is produced.In one embodiment
In, main line ring layer 50 can have the structure similar to main line ring layer 22.In one embodiment, three
Or more a main line ring layer be used to produce main gradient fields.
Fig. 5 show the generalized section of the head NMR zeugmatographic imaging equipment 10 of another embodiment.Fig. 5
Shown head NMR zeugmatographic imaging equipment 10 is similar with the head NMR zeugmatographic imaging equipment 10 shown in Fig. 1.
The head NMR zeugmatographic imaging equipment 10 shown in Fig. 1 is compared to, the head NMR zeugmatographic imaging shown in Fig. 5 sets
Standby 10 further include the intermediary layer 52 that is supported by insulating support 26, for causing field homogeneity.In figure
In embodiment shown in 5, intermediary layer 52 is located between main line ring layer 22 and shielding line ring layer 24.Intermediary
Layer 52 includes some intermediary's coils.Larger interval between main line ring layer 22 and shielding line ring layer 24 permits
Perhaps intermediary layer 52 inserts the heat that acceptor's coil layer 22 and shielding line ring layer 24 are produced between the two and not
Influence.
Fig. 6 show the generalized section of the head NMR zeugmatographic imaging equipment 10 of another embodiment.Fig. 6
Shown head NMR zeugmatographic imaging equipment 10 is similar with the head NMR zeugmatographic imaging equipment 10 shown in Fig. 5.
The head NMR zeugmatographic imaging equipment 10 shown in Fig. 5 is compared to, the intermediary layer 52 shown in Fig. 6 is near screen
Cover coil layer 24 on its inside.
Fig. 7 show the generalized section of the head NMR zeugmatographic imaging equipment 10 of another embodiment.Fig. 7
Shown head NMR zeugmatographic imaging equipment 10 is similar with the head NMR zeugmatographic imaging equipment 10 shown in Fig. 5.
The head NMR zeugmatographic imaging equipment 10 shown in Fig. 5 is compared to, the intermediary layer 52 shown in Fig. 7 is located at exhausted
The external diameter of edge support 26, shielding line ring layer 24 is located at the inner side of intermediary layer 52 and near intermediary layer 52.
Fig. 5 to Fig. 7 shows the unrestricted example of intermediary layer 52, and in other embodiments, intermediary layer 52 can
Otherwise to arrange.
Although with reference to specific implementation method, the present invention is described, and those skilled in the art can
To understand, can be so that many modifications may be made and modification to the present invention.It is therefore contemplated that, claims
Be intended to cover all such modifications in true spirit of the present invention and scope and modification.
Claims (20)
1. a kind of head NMR zeugmatographic imaging equipment, it is characterised in that the head NMR zeugmatographic imaging equipment
Including：
Main magnet, with central cavity；And
Head gradient coil block, in the central cavity, and the main line ring layer including head size,
Shielding line ring layer and insulating support, the main line ring layer be used for produce main gradient fields with produce a size into
As visual field, the shielding line ring layer is used for producing shielding gradient fields to offset the head gradient coil block
Outer described main gradient fields, the insulating support is used for supporting the main line ring layer and the shielding line ring layer,
The shielding line ring layer is sized to can be around the shoulder of patient.
2. head NMR zeugmatographic imaging equipment as claimed in claim 1, it is characterised in that：The head ladder
Degree coil block includes the multiple described master supported by the insulating support for being used for producing the main gradient fields
Coil layer.
3. head NMR zeugmatographic imaging equipment as claimed in claim 1, it is characterised in that：The insulation branch
Frame includes external diameter and internal diameter, and the main line ring layer is located at the internal diameter of the insulating support, the shielded coil
Layer is located at the external diameter of the insulating support.
4. head NMR zeugmatographic imaging equipment as claimed in claim 1, it is characterised in that：In the insulation
The shielding line ring layer is more long than the main line ring layer on the length direction of support.
5. head NMR zeugmatographic imaging equipment as claimed in claim 1, it is characterised in that：The insulation branch
Frame includes inner chamber, and the inner chamber has can be housed first internal diameter of patients head and can house patient's shoulder
Second internal diameter bigger than the first internal diameter.
6. head NMR zeugmatographic imaging equipment as claimed in claim 1, it is characterised in that：The head ladder
Degree coil block further includes the intermediary layer supported by the insulating support.
7. head NMR zeugmatographic imaging equipment as claimed in claim 1, it is characterised in that：The insulation branch
Frame contains at least one in sound dampening material and shock material.
8. a kind of head gradient coil block, it is characterised in that the head gradient coil block includes：
The main line ring layer of head size, for producing main gradient fields to produce the imaging viewing field of a size；
Shielding line ring layer, for producing shielding gradient fields to offset the institute outside the head gradient coil block
Main gradient fields are stated, the shielding line ring layer is sized to can be around the shoulder of patient；And
Insulating support, for supporting the main line ring layer and the shielding line ring layer.
9. head gradient coil block as claimed in claim 8, it is characterised in that：The head gradient
Coil block includes the multiple described main line supported by the insulating support for being used for producing the main gradient fields
Ring layer.
10. head gradient coil block as claimed in claim 8, it is characterised in that：The insulation branch
Frame includes external diameter and internal diameter, and the main line ring layer is located at the internal diameter of the insulating support, the shielded coil
Layer is located at the external diameter of the insulating support.
11. head gradient coil blocks as claimed in claim 8, it is characterised in that：In the insulation
The shielding line ring layer is more long than the main line ring layer on the length direction of support.
12. head gradient coil blocks as claimed in claim 8, it is characterised in that：The insulation branch
Frame includes inner chamber, and the inner chamber has can be housed first internal diameter of patients head and can house patient's shoulder
Second internal diameter bigger than the first internal diameter.
13. head gradient coil blocks as claimed in claim 8, it is characterised in that：The head ladder
Degree coil block further includes the intermediary layer supported by the insulating support.
14. head gradient coil blocks as claimed in claim 8, it is characterised in that：The insulation branch
Frame contains at least one in sound dampening material and shock material.
15. a kind of head gradient coil blocks, it is characterised in that the head gradient coil block includes：
Insulating support, including external diameter and internal diameter；
Main line ring layer, positioned at the internal diameter of the insulating support, for producing main gradient fields, the main coil
Layer be sized to can around the head of patient and cause patient shoulder in the outside of main line ring layer；And
Shielding line ring layer, positioned at the external diameter of the insulating support, for producing shielding gradient fields to offset
The described main gradient fields outside head gradient coil block are stated, the shielding line ring layer is sized to can ring
Around the shoulder of patient.
16. head gradient coil blocks as claimed in claim 15, it is characterised in that：The head ladder
Degree coil block includes the multiple described master supported by the insulating support for being used for producing the main gradient fields
Coil layer.
17. head gradient coil blocks as claimed in claim 15, it is characterised in that：In the insulation
The shielding line ring layer is more long than the main line ring layer on the length direction of support.
18. head gradient coil blocks as claimed in claim 15, it is characterised in that：The insulation branch
Frame includes inner chamber, and the inner chamber has can be housed first internal diameter of patients head and can house patient's shoulder
Second internal diameter bigger than the first internal diameter.
19. head gradient coil blocks as claimed in claim 15, it is characterised in that：The head ladder
Degree coil block further includes the intermediary layer supported by the insulating support.
20. head gradient coil blocks as claimed in claim 15, it is characterised in that：The insulation branch
Frame contains at least one in sound dampening material and shock material.
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| CN201510971932.5A CN106908746B (en) | 2015-12-22 | 2015-12-22 | Head magnetic resonance imaging apparatus and head gradient coil assembly thereof |
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| CN201510971932.5A CN106908746B (en) | 2015-12-22 | 2015-12-22 | Head magnetic resonance imaging apparatus and head gradient coil assembly thereof |
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| CN109696645A (en) * | 2018-12-29 | 2019-04-30 | 佛山瑞加图医疗科技有限公司 | A kind of non-planar gradient coil |
| US20200355768A1 (en) * | 2019-05-10 | 2020-11-12 | Geron BINDSEIL | Coil system with different currents driven through the shield and primary coils |
| JP2020185068A (en) * | 2019-05-10 | 2020-11-19 | ゼネラル・エレクトリック・カンパニイ | Magnetic resonance imaging device and program |
| 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 |
| CN116087849A (en) * | 2023-02-28 | 2023-05-09 | 江苏力磁医疗设备有限公司 | Gradient coil special for MRI |
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| CN109696645A (en) * | 2018-12-29 | 2019-04-30 | 佛山瑞加图医疗科技有限公司 | A kind of non-planar gradient coil |
| US20200355768A1 (en) * | 2019-05-10 | 2020-11-12 | Geron BINDSEIL | Coil system with different currents driven through the shield and primary coils |
| JP2020185068A (en) * | 2019-05-10 | 2020-11-19 | ゼネラル・エレクトリック・カンパニイ | Magnetic resonance imaging device and program |
| 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 |
| EP4242681A1 (en) * | 2022-03-10 | 2023-09-13 | Siemens Healthcare GmbH | Gradient coil unit comprising two hollow cylinder areas for a magnetic resonance imaging system |
| CN116087849A (en) * | 2023-02-28 | 2023-05-09 | 江苏力磁医疗设备有限公司 | Gradient coil special for MRI |
| CN116087849B (en) * | 2023-02-28 | 2023-11-17 | 江苏力磁医疗设备有限公司 | Gradient coil special for MRI |
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