CN210639271U - Shimming ring for magnetic resonance - Google Patents
Shimming ring for magnetic resonance Download PDFInfo
- Publication number
- CN210639271U CN210639271U CN201921070029.1U CN201921070029U CN210639271U CN 210639271 U CN210639271 U CN 210639271U CN 201921070029 U CN201921070029 U CN 201921070029U CN 210639271 U CN210639271 U CN 210639271U
- Authority
- CN
- China
- Prior art keywords
- silicon steel
- magnetic resonance
- steel sheet
- shimming
- ring
- 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.)
- Active
Links
Images
Landscapes
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
The utility model discloses a shimming ring for magnetic resonance belongs to open magnetic resonance field, is formed by the concatenation of 12 arc uniform field pieces that the structure is the same, the shimming piece is including the insulating piece of locating the bottom, locates the silicon steel sheet lamination of medial different thickness and locates the clamp plate of top layer, insulating piece, silicon steel sheet and clamp plate pass through fixing bolt fixed connection in extremely overhead. The utility model adopts the above structure shimming ring for magnetic resonance processing simple process, convenient operation and can effectively reduce the influence of response vortex to the regional image quality of magnetic resonance imaging.
Description
Technical Field
The utility model relates to a medical magnetic resonance field especially relates to a shimming ring for magnetic resonance.
Background
The shimming ring is a main component of a pole head in a magnetic resonance magnet, the shimming ring of the magnetic resonance product on the market at present mainly comprises a segmented arc-shaped thick iron plate, and a sheet-shaped silicon steel sheet is distributed between the shimming ring and the pole head and used for adjusting the uniformity of a magnetic field. Because the shimming ring is positioned at the position of the gradient coil, under the action of a magnetic field of the gradient coil, the blocky shimming ring is a good conductor, has small self resistance, can generate larger induced current-eddy current and has certain influence on the image quality of the magnetic resonance system.
Disclosure of Invention
The utility model aims at providing a shimming ring for magnetic resonance solves the problem that the induced-current that shimming ring of current magnetic resonance equipment produced is big, develops an easy operation, convenient to use and can effectively reduce the produced vortex of shimming ring to the influence of magnetic resonance image.
In order to achieve the above object, the utility model provides a shimming ring for magnetic resonance is formed by 12 arc shim concatenations that the structure is the same, shim locates the silicon steel sheet lamination of medial different thickness and locates the clamp plate of top layer including the insulating piece of locating the bottom, insulating piece, silicon steel sheet and clamp plate pass through fixing bolt fixed connection in the utmost point overhead.
Preferably, the insulation sheet is a non-magnetic material-permeable highland barley paper sheet and is used for realizing insulation between the silicon steel sheet and the pole head.
Preferably, the pressing plate is made of a non-magnetic conductive structural material, the thickness of the pressing plate is 10mm, and two positioning holes are formed in the pressing plate.
Preferably, the silicon steel sheet is formed by cutting a silicon steel sheet with oriented low iron loss by laser, the specification and model of the silicon steel sheet is 27QG100, and the thickness of the silicon steel sheet is divided into 0.5mm and 0.27 mm.
Preferably, the silicon steel sheet is an oriented silicon steel sheet, the orientation direction is a horizontal direction, and the electromagnetic property of the silicon steel sheet in the orientation direction is superior to that of other directions.
Has the advantages that:
the shimming ring for magnetic resonance is simple to operate and convenient to use, and can effectively reduce the influence of eddy current generated by the shimming ring on a magnetic resonance image.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic view of a magnetic resonance magnet structure to which the present invention is applied.
Fig. 2 is a schematic structural diagram of a shimming ring for magnetic resonance in the present invention.
Fig. 3 is a schematic view of a shim ring assembly shim block for magnetic resonance.
Wherein: 1-a magnet frame; 2-a coil; 3-an iron core; 4-pole shoe; 5-pole head; 6-shimming rings; 7-pressing a plate; 8-silicon steel sheet; 9-an insulating sheet.
Detailed Description
The following describes embodiments of the present invention with reference to the accompanying drawings.
Fig. 1 is an application of the utility model discloses a magnetic resonance magnet structure schematic diagram, fig. 2 is the utility model relates to a shimming ring structure schematic diagram for magnetic resonance, fig. 3 is the utility model relates to a shimming ring subassembly shimming block structure schematic diagram for magnetic resonance. As shown in the figure, a shimming ring for magnetic resonance is formed by 12 arc shimming blocks with the same structure in a splicing mode, the shimming block comprises an insulating sheet 9 arranged on the bottom layer, a silicon steel sheet 8 lamination arranged on the middle layer and different in thickness and a pressing plate 7 arranged on the top layer, and the insulating sheet 9, the silicon steel sheet 8 and the pressing plate 7 are fixedly connected to the pole head 5 through fixing bolts.
The utility model relates to a shimming ring assembly shim block for magnetic resonance, which consists of a pressing plate 7, a silicon steel sheet 8 and an insulating sheet 9, wherein the insulating sheet 9 is made of highland barley paper and is positioned between the silicon steel sheet 8 and a pole head 5, so that the mutual transmission of induction eddy currents between the pole head and the silicon steel sheet can be prevented; the silicon steel sheets 8 are formed by cutting and processing oriented silicon steel sheets with low iron loss by laser, the specification and model of the silicon steel sheets 8 are 27QG100, the thickness of the silicon steel sheets 8 is divided into 0.5mm and 0.27mm, and the shim ring is mainly used for adjusting the height of the shim ring and is convenient for shimming; the pressing plate 7 is formed by processing a non-magnetic-conductive structural material, the thickness of the pressing plate 7 is 10mm, 2 positioning holes are formed in the pressing plate 7 and used for tightly pressing the silicon steel sheet, the silicon steel sheet is prevented from deforming under the action of a magnetic field, and induced current cannot be generated when the pressing plate is made of a non-magnetic-conductive insulating material.
When the magnetic resonance device is used, the magnetic resonance system is assembled according to the figure 1, the number of the silicon steel sheets 8 is increased or decreased to adjust the uniformity of the magnetic field, and the shimming ring is fastened on the pole head 5 by using the fixing bolt after the uniformity of the magnetic field is adjusted.
The utility model provides a shimming ring for magnetic resonance adopts layered high resistance sheet silicon steel sheet to replace traditional shimming ring, because sheet silicon steel sheet self resistance is big and induced-current only exists in the piece, vortex conduction phenomenon can not take place between the piece, can effectively reduce the influence of induced vortex to the regional image quality of magnetic resonance imaging and can adjust magnetic field homogeneity.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it, although the technical solution of the present invention is described in detail with reference to the preferred embodiments, the skilled person of the present invention should understand that: the technical solution of the present invention can still be modified or replaced by other equivalent means, and the modified technical solution can not be separated from the spirit and scope of the technical solution of the present invention.
Claims (5)
1. A shimming ring for magnetic resonance is characterized in that: the shimming ring for magnetic resonance is formed by 12 arc shimming blocks with the same structure in a splicing mode, the shimming blocks comprise insulating sheets arranged on the bottom layer, silicon steel sheet laminations arranged on the middle layer and different in thickness and pressing plates arranged on the top layer, and the insulating sheets, the silicon steel sheets and the pressing plates are fixedly connected to the pole heads through fixing bolts.
2. A shim ring for magnetic resonance as claimed in claim 1, wherein: the insulation sheet is a non-magnetic material highland barley paper sheet and is used for realizing insulation between the silicon steel sheet and the pole head.
3. A shim ring for magnetic resonance as claimed in claim 1, wherein: the pressing plate is made of a non-magnetic conductive structural material, the thickness of the pressing plate is 10mm, and two positioning holes are formed in the pressing plate.
4. A shim ring for magnetic resonance as claimed in claim 1, wherein: the silicon steel sheet is formed by cutting a silicon steel sheet with orientation and low iron loss by laser, the specification and model of the silicon steel sheet is 27QG100, and the thickness of the silicon steel sheet is divided into 0.5mm and 0.27 mm.
5. A shim ring for magnetic resonance as claimed in claim 1, wherein: the silicon steel sheet is an oriented silicon steel sheet, the orientation direction is the horizontal direction, and the electromagnetic property of the silicon steel sheet in the orientation direction is superior to that of other directions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921070029.1U CN210639271U (en) | 2019-07-10 | 2019-07-10 | Shimming ring for magnetic resonance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921070029.1U CN210639271U (en) | 2019-07-10 | 2019-07-10 | Shimming ring for magnetic resonance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210639271U true CN210639271U (en) | 2020-05-29 |
Family
ID=70794426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921070029.1U Active CN210639271U (en) | 2019-07-10 | 2019-07-10 | Shimming ring for magnetic resonance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210639271U (en) |
-
2019
- 2019-07-10 CN CN201921070029.1U patent/CN210639271U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3548240B2 (en) | Magnetic resonance imaging (MRI) magnet | |
| US10978237B2 (en) | Core for stationary induction apparatus | |
| EP0192331A1 (en) | Electromagnet | |
| CN111172823A (en) | Halbach type permanent magnet track | |
| CN101598775B (en) | Medical magnetic resonance imager monohedral magnet device | |
| CN102412051A (en) | Permanent magnet assembly with high-intensity magnetic field and high uniformity | |
| US10622130B2 (en) | Superconducting magnet and magnetic resonance imaging apparatus | |
| CN210639271U (en) | Shimming ring for magnetic resonance | |
| WO2015180632A1 (en) | Light-weight alternating-current contactor iron core and manufacturing method therefor | |
| CN109967591B (en) | Device and method for realizing electromagnetic forming radial thrust of plate by adopting axial constant magnetic field and induced eddy current | |
| CN110459378A (en) | A kind of permanent magnetic device generating space uniform magnetic field | |
| CN103680855A (en) | Built-in converter transformer core pulling plate column ring-current bypass structure | |
| CN100434928C (en) | Magnetic field generating system used for magnetic resonance equipment | |
| CN107146684B (en) | Non-converging reactor hanging bracket device and reactor | |
| CN113963921B (en) | Single-phase iron core reactor with uniform magnetic density | |
| CN101256221B (en) | Method for reducing eddy due to gradient magnetic field | |
| CN211689694U (en) | Halbach type permanent magnet track | |
| CN109946180B (en) | Pulse force loading device and method suitable for unidirectional tensile test of metal pipe fitting | |
| JPH10146326A (en) | Magnetic field generator for mri | |
| JPH07100058B2 (en) | Magnetic resonance imaging device | |
| EP2673790A1 (en) | Amorphous metal transformer | |
| CN204515111U (en) | The anti-eddy current assemblies of a kind of permanent magnet | |
| CN2534973Y (en) | Magnetic resonance imaging magnet compensated by thermomagnetic alloy | |
| CN101345115A (en) | Open type permanent magnet module used for magnetic resonance wave spectrum analyzer | |
| CN215955039U (en) | Amorphous alloy transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201117 Address after: 071000 commercial, Room 202, Shenzhen Garden Exhibition Center, 299 Dongsanhuan, Lianchi District, Baoding City, Hebei Province Patentee after: HEBEI HUIREN MEDICAL EQUIPMENT TECHNOLOGY Co.,Ltd. Address before: 072450 No. 1 Ziqiang Street, Wangdu County Economic Development Zone, Baoding City, Hebei Province Patentee before: HUIREN WANGDU MEDICAL EQUIPMENT SCIENCE & TECHNOLOGY Co.,Ltd. |