CN208399666U - A kind of radio frequency coil assemblies - Google Patents
A kind of radio frequency coil assemblies Download PDFInfo
- Publication number
- CN208399666U CN208399666U CN201821111609.6U CN201821111609U CN208399666U CN 208399666 U CN208399666 U CN 208399666U CN 201821111609 U CN201821111609 U CN 201821111609U CN 208399666 U CN208399666 U CN 208399666U
- Authority
- CN
- China
- Prior art keywords
- wire body
- arc
- radio frequency
- interior loop
- coil
- 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
Landscapes
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
The utility model relates to a kind of radio frequency coil assemblies, and including Helmholtz coil and the interior loop being placed in Helmholtz coil, interior loop is with Helmholtz coil with central axis and center is overlapped.The utility model passes through in an interior loop built in Helmholtz coil, the interior loop is with Helmholtz coil with central axis and center is overlapped, the magnetic field of interior loop is mutually perpendicular to Helmholtz coil magnetic field, using Helmholtz coil as transmitting coil and receiving coil, interior loop eliminates the magnetic field coupling between Helmholtz coil and interior loop, improves signal-to-noise ratio as receiving coil, to provide the reception magnetic field and more uniform transmitting magnetic field of more high receiving efficiency, image quality is improved.
Description
Technical field
The utility model relates to magnetic resonance radio frequency coils, more specifically refer to a kind of radio frequency coil assemblies.
Background technique
MRI (i.e. magnetic resonance imaging) is to utilize for human body to be placed in magnet, and emit a radiofrequency signal, intracorporal to people
Atomic nucleus is motivated, to generate covibration, closes after pumping signal, the intracorporal faint resonance signal of people can be released
It puts and is received, after receiving amplification, in conjunction with the location technology of gradient, to carry out signal reconstruction, obtain tissue
Magnetic resonance imaging.Front end of the radio-frequency coil as signal reception chain, very important effect is played to image quality, at present
Radio-frequency coil, be mostly used in the imaging at each position of human body, improve with the development of technology, mr imaging technique is also opened
Beginning is used for animal, but the radio-frequency coil of few animal specifics.
Existing horses joint coil uses the structure of basic solenoid coil, as shown in Figure 1 and Figure 2, one
Solenoid coil is simultaneously as transmitting and receiving unit, and magnetic field strength and uniformity are bad, and signal-to-noise ratio is low, and image quality is poor.Separately
Outside, copper sheet inside the solenoid coil, outside use plastic shell, and plastic shell is often trampled on by horse, and the service life is short；It must when scanning
Must be put on the ground or other third party's objects on, convenience is poor, and coil can not be bonded horse leg, poor image quality, and coil is effective
Coverage area is small.
Therefore, it is necessary to design a kind of new radio frequency coil assemblies, realize that uniformity is good, signal-to-noise ratio is high, imaging clearly
Effect.
Utility model content
The purpose of the utility model is to overcome the defects of the prior art, provide a kind of radio frequency coil assemblies.
To achieve the above object, the utility model uses following technical scheme: a kind of radio frequency coil assemblies, including Hai Muhuo
Hereby coil and the interior loop being placed in Helmholtz coil, the interior loop and the Helmholtz coil with central axis and in
The heart is overlapped.
Its further technical solution are as follows: the axial direction that the axial length of the interior loop is shorter than the Helmholtz coil is long
Degree.
Its further technical solution are as follows: the body cross-section diameter of the interior loop is less than the sheet of the Helmholtz coil
Body cross-sectional diameter.
Its further technical solution are as follows: the interior loop is in outer gibbosity arrangement along central axis outwardly, the interior loop difference
Including the first arc wire body group and the second arc wire body group, the first arc wire body group and the second arc wire body component
Not Bao Kuo upper arc wire body and arc lower wire body, the upper arc wire body and the first arc wire body of the first arc wire body group
Adjacent wherein one end of the arc lower wire body of group is connected by first connecting portion；The upper curved line of the second arc wire body group
Body is connected with adjacent wherein one end of the arc lower wire body of the second arc wire body group by second connecting portion.
Its further technical solution are as follows: the other end of the upper arc wire body of the first arc wire body group is equipped with curved on first
Pars convoluta, the other end of the arc lower wire body of the first arc wire body group are equipped with the first lower bending section；The second arc wire body
The other end of the upper arc wire body of group is equipped with bending section on second, the other end of the arc lower wire body of the second arc wire body group
Equipped with the second lower bending section；Bending section is connect with the described second lower bending section by transition part on described first, the transition part,
Bending section and the second lower bending section are integrally formed on first.
Its further technical solution are as follows: on the described first lower bending section and described second bending section respectively with the transition
Portion is tangent.
Its further technical solution are as follows: the radio frequency coil assemblies further include support protective layer, the Helmholtz coil
And interior loop is embedded in the support protective layer.
Its further technical solution are as follows: the buffering that the support protective layer includes protective shell and connect with the protective shell
Part, the Helmholtz coil and interior loop are embedded in the bolster.
Its further technical solution are as follows: the material of the protective shell is resin.
Its further technical solution are as follows: the bolster includes sponge and EVA.
The beneficial effect of the utility model compared with prior art is: a kind of radio frequency coil assemblies of the utility model, leads to
It crosses in an interior loop built in Helmholtz coil, the interior loop is with Helmholtz coil with central axis and center is overlapped, interior lines
The magnetic field of circle is mutually perpendicular to Helmholtz coil magnetic field, using Helmholtz coil as transmitting coil and receiving coil, interior lines
Circle is used as receiving coil, eliminates the magnetic field coupling between Helmholtz coil and interior loop, improves signal-to-noise ratio, to provide more
Image quality is improved in the reception magnetic field of high receiving efficiency and more uniform transmitting magnetic field.
The utility model is further described in the following with reference to the drawings and specific embodiments.
Detailed description of the invention
Fig. 1 is the use schematic diagram of the solenoid coil of the prior art；
Fig. 2 is the integrated circuit schematic diagram of the solenoid coil of the prior art；
Fig. 3 is that a kind of three-dimensional structure diagram for radio frequency coil assemblies that the utility model specific embodiment provides (does not include branch
Support protective layer)；
Fig. 4 is a kind of whole circuit diagram for radio frequency coil assemblies that the utility model specific embodiment provides.
Fig. 5 is the three-dimensional structure diagram for the support protective layer that the utility model specific embodiment provides.
Specific embodiment
In order to more fully understand the technology contents of the utility model, combined with specific embodiments below to the skill of the utility model
Art scheme is further described and illustrates, but not limited to this.
It should be appreciated that ought use in this specification and in the appended claims, term " includes " and "comprising" instruction
Described feature, entirety, step, operation, the presence of element and/or component, but one or more of the other feature, whole is not precluded
Body, step, operation, the presence or addition of element, component and/or its set.
It is also understood that mesh of the term used in this present specification merely for the sake of description specific embodiment
And be not intended to limit the application.As present specification and it is used in the attached claims, unless on
Other situations are hereafter clearly indicated, otherwise " one " of singular, "one" and "the" are intended to include plural form.
It will be further appreciated that the term "and/or" used in present specification and the appended claims is
Refer to any combination and all possible combinations of one or more of associated item listed, and including these combinations.
A kind of specific embodiment as seen in figures 3-5, radio frequency coil assemblies provided in this embodiment, can be used in horse
Joint carries out magnetic resonance imaging, realizes that uniformity is good, signal-to-noise ratio is high, the effect of imaging clearly.
Referring to Fig. 3, a kind of radio frequency coil assemblies comprising Helmholtz coil 10 and be placed in Helmholtz coil 10
Interior interior loop, interior loop is with Helmholtz coil 10 with central axis and center is overlapped.
It regard Helmholtz coil 10 as transmitting coil, the magnetic field and 10 magnetic field of Helmholtz coil of interior loop are mutually hung down
Directly, using interior loop as receiving coil, coupling is eliminated, improves signal-to-noise ratio, to provide more high field intensity and more uniform magnetic field.
In one embodiment, the axial length of above-mentioned interior loop is shorter than the axial length of Helmholtz coil 10.
In one embodiment, the body cross-section diameter of above-mentioned interior loop is transversal less than the ontology of Helmholtz coil 10
Face diameter.
Two skies are formed by adjusting the radius size of two coils, copper sheet width, height and spatial relation
Between upper orthogonal magnetic field as uniform as possible；Wherein Helmholtz coil 10 is used as transmitting coil and receiving coil, interior lines
It encloses and is used as receiving coil, after two coil orthogonal synthesis, signal-to-noise ratio is plain solenoid coilTimes.
In one embodiment, above-mentioned interior loop is in outer gibbosity arrangement along central axis outwardly, and interior loop respectively includes first
Arc wire body group 1 and the second arc wire body group 2, the first arc wire body group 1 and the second arc wire body group 2 respectively include arc
Shape wire body and arc lower wire body, the arc lower wire body of the upper arc wire body 20 of the first arc wire body group 1 and the first arc wire body group 1
30 adjacent wherein one end is connected by first connecting portion 70；The upper arc wire body and the second arc of second arc wire body group 2
Adjacent wherein one end of the arc lower wire body of wire body group 2 is connected by second connecting portion 80.
Further, the other end of the upper arc wire body 20 of the first above-mentioned arc wire body group 1 is equipped on first and is bent
Portion 21, the other end of the arc lower wire body 30 of the first arc wire body group 1 are equipped with the first lower bending section 31；First arc wire body group 2
Upper arc wire body 40 the other end be equipped with second on bending section 41, the arc lower wire body 50 of the first arc wire body group 2 it is another
End is equipped with the second lower bending section 51；Bending section 21 is connect with the second lower bending section 51 by transition part 60 on first, transition part 60,
Bending section 21 and the second lower bending section 51 are integrally formed on first.The interior loop can curve around to be formed by a line.
Specifically, bending section 41 is tangent with the transition part 60 respectively on the first above-mentioned lower bending section 31 and second
Preferably, on the above-mentioned first lower bending section 31 and second bending section 41 respectively with 60 same position of transition part two
Side is tangent.
In one embodiment, along inclined extension 32 outwardly from bottom to top, this prolongs for the outer end of the first lower bending section 31
Extending portion 32 and transition part 60 are tangent.
Interior loop bending is in cylindrical arrangement can be eliminated in Helmholtz coil 10 Durham suddenly hereby coil and interior loop it
Between magnetic field coupling, increase magnetic field strength, to improve signal-to-noise ratio and image quality.
Two skies are formed by adjusting the radius size of two coils, copper sheet width, height and spatial relation
Between upper orthogonal magnetic field as uniform as possible；Wherein Helmholtz coil 10 is used as transmitting coil and receiving coil, interior lines
Circle is used as receiving coil, and with strong points, after two coil orthogonal synthesis, signal-to-noise ratio is plain solenoid coilTimes.
In other embodiments, bending section 41 is connected by another interconnecting piece on the above-mentioned first lower bending section 31 and second
It connects, the adjacent interconnecting piece of two of them is tangent, is formed in this way, interior loop can be considered to surround by two wire bodies, the two wire bodies
Tangent arrangement.
At this point, interior loop is equivalent to two tangent placements of circular coil, a current direction is clockwise, and an electric current is inverse
The current direction of hour hands, two such coil junction is identical, and the number of turns is added, and magnetic field strength and direction are also superimposed, institute
It is maximum with the magnetic field strength at interim union.
Fig. 3 and Fig. 4 are please referred to, Helmholtz coil 10 and the interior loop being placed in Helmholtz coil 10 flow through two
Different electric current I0And Ii, electric current I0It flows through in two circles up and down of Helmholtz coil 10, is formed by two circles in the same direction
Magnetic direction it is identical, according to Ampere's law magnetic field B0With it is upper and lower two circle where planes it is vertical, and Helmholtz coil 10 with it is interior
The distance between coil D=R, soIt follows that
Magnetic field is most uniform at center.And in interior loop, flow through the electric current I of interior loopiThe magnetic line of force at the midpoint of two symmetroids
Axial region understands some and cancels out each other, and gradually reinforces toward both ends magnetic field, and magnetic field B1With the circle formed after interior loop bending
Place planar horizontal, in this way, the magnetic field that the magnetic field that Helmholtz coil 10 is formed is formed with interior loop is mutually perpendicular in space, institute
With, it will form the quadrature field of axially and tangentially both direction, compared to current solenoid coil, launching site and received field
Intensity and uniformity and signal-to-noise ratio are obviously improved.
In one embodiment, above-mentioned radio frequency coil assemblies further include support protective layer, Helmholtz coil 10 and interior
Coil is embedded in support protective layer.
In one embodiment, as shown in figure 5, above-mentioned support protective layer includes protective shell 3 and connect with protective shell 3
Bolster, Helmholtz coil 10 and interior loop are embedded in the bolster.
Preferably, the material of protective shell 3 is resin.
Preferably, bolster includes sponge 4 and EVA5, and the sponge 4 is located in EVA5, and Helmholtz coil 10 is embedded in
In EVA5, interior loop is in sponge 4.
Using 4 foamed material of high rigidity EVA5 and sponge, Helmholtz coil 10 and interior loop are passed through into foam process point
It is not placed in inside EVA5 and sponge 4, the EVA5 of high rigidity ensure that the regular circularity of Helmholtz coil 10, also ensure that hair
Penetrate the good uniformity in magnetic field and stability；EVA5 material has good tension and crushing resistance, is difficult to be trampled on by horse when in use,
The service life for improving coil reduces maintenance cost；Interior loop extraordinary can be bonded by the good elasticity of sponge 4
Horse leg joint, further increases image quality；It is good that convenience on horse leg can also be directly suspended in；Simultaneously coil total quality compared with
Gently.
A kind of above-mentioned radio frequency coil assemblies, by an interior loop built in Helmholtz coil 10, the interior loop with
Helmholtz coil 10 is with central axis and center is overlapped, and magnetic field and 10 magnetic field of Helmholtz coil of interior loop are mutually perpendicular to, will
Helmholtz coil 10 be used as transmitting coil and receiving coil, interior loop be used as receiving coil, eliminate Helmholtz coil and
Magnetic field coupling between interior loop, improves signal-to-noise ratio, with the reception magnetic field of offer more high receiving efficiency and more uniform hair
Magnetic field is penetrated, image quality is improved.
The above-mentioned technology contents that the utility model is only further illustrated with embodiment, in order to which reader is easier to understand,
But the embodiments of the present invention is not represented is only limitted to this, any technology done according to the utility model extends or recreation,
By the protection of the utility model.The protection scope of the utility model is subject to claims.
Claims (10)
1. a kind of radio frequency coil assemblies, which is characterized in that including Helmholtz coil and in being placed in Helmholtz coil
Coil, the interior loop is with the Helmholtz coil with central axis and center is overlapped.
2. a kind of radio frequency coil assemblies according to claim 1, which is characterized in that the axial length of the interior loop is shorter than
The axial length of the Helmholtz coil.
3. a kind of radio frequency coil assemblies according to claim 1, which is characterized in that the body cross-section of the interior loop is straight
Diameter is less than the body cross-section diameter of the Helmholtz coil.
4. a kind of radio frequency coil assemblies according to any one of claims 1 to 3, which is characterized in that the interior loop is in
Mandrel is in outer gibbosity arrangement outwardly, and the interior loop respectively includes the first arc wire body group and the second arc wire body group, described
First arc wire body group and the second arc wire body group include upper arc wire body and arc lower wire body, first arc respectively
Adjacent wherein one end of the upper arc wire body of wire body group and the first arc wire body group arc lower wire body passes through the first connection
Portion's connection；The arc lower wire body of the upper arc wire body of the second arc wire body group and the second arc wire body group it is adjacent
Wherein one end is connected by second connecting portion.
5. a kind of radio frequency coil assemblies according to claim 4, which is characterized in that the upper arc of the first arc wire body group
The other end of shape wire body is equipped with bending section on first, and the other end of the arc lower wire body of the first arc wire body group is equipped with first
Lower bending section；The other end of the upper arc wire body of the second arc wire body group is equipped with bending section on second, second arc
The other end of the arc lower wire body of wire body group is equipped with the second lower bending section；Bending section under bending section and described second on described first
It is connected by transition part, the transition part, bending section and the second lower bending section are integrally formed on first.
6. a kind of radio frequency coil assemblies according to claim 5, which is characterized in that the described first lower bending section and described
Bending section is tangent with the transition part respectively on second.
7. a kind of radio frequency coil assemblies according to claim 6, which is characterized in that the radio frequency coil assemblies further include branch
Protective layer is supportted, the Helmholtz coil and interior loop are embedded in the support protective layer.
8. a kind of radio frequency coil assemblies according to claim 7, which is characterized in that the support protective layer includes protective shell
And the bolster connecting with the protective shell, the Helmholtz coil and interior loop are embedded in the bolster.
9. a kind of radio frequency coil assemblies according to claim 8, which is characterized in that the material of the protective shell is resin.
10. a kind of radio frequency coil assemblies according to claim 8, which is characterized in that the bolster include sponge and
EVA。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821111609.6U CN208399666U (en) | 2018-07-13 | 2018-07-13 | A kind of radio frequency coil assemblies |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821111609.6U CN208399666U (en) | 2018-07-13 | 2018-07-13 | A kind of radio frequency coil assemblies |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208399666U true CN208399666U (en) | 2019-01-18 |
Family
ID=65131630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821111609.6U Active CN208399666U (en) | 2018-07-13 | 2018-07-13 | A kind of radio frequency coil assemblies |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208399666U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380521A (en) * | 2019-07-02 | 2019-10-25 | 上海交通大学 | Three-winding wireless energy supply system for gastrointestinal tract microrobot |
| CN116520224A (en) * | 2023-05-09 | 2023-08-01 | 江苏力磁医疗设备有限公司 | Solenoid quadrature coil for magnetic resonance imaging |
-
2018
- 2018-07-13 CN CN201821111609.6U patent/CN208399666U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380521A (en) * | 2019-07-02 | 2019-10-25 | 上海交通大学 | Three-winding wireless energy supply system for gastrointestinal tract microrobot |
| CN110380521B (en) * | 2019-07-02 | 2023-03-14 | 上海交通大学 | Three-coil wireless energy supply system for gastrointestinal tract micro-robot |
| CN116520224A (en) * | 2023-05-09 | 2023-08-01 | 江苏力磁医疗设备有限公司 | Solenoid quadrature coil for magnetic resonance imaging |
| CN116520224B (en) * | 2023-05-09 | 2023-11-24 | 江苏力磁医疗设备有限公司 | Solenoid quadrature coil for magnetic resonance imaging |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10520563B2 (en) | Adaptive MR local coil | |
| US6650926B1 (en) | Flexible multi-section MRI radio frequency array coil | |
| CN208399666U (en) | A kind of radio frequency coil assemblies | |
| US8046046B2 (en) | RF array coil system and method for magnetic resonance imaging | |
| US6975115B1 (en) | Coil arrays for parallel imaging in magnetic resonance imaging | |
| JP6353028B2 (en) | Magnetic resonance imaging coil system | |
| JP4554056B2 (en) | Unique uncoupled sandwich solenoid array coil | |
| CN103261906B (en) | Passive B1 field shimming | |
| CN202776302U (en) | Shoulder coil for magnetic resonance imaging system and magnetic resonance imaging system | |
| US20120153954A1 (en) | Rf coil device and magnetic resonance imaging apparatus | |
| EP1962100A1 (en) | Magnetic structure for MRI machines and MRI machine particularly for orthopedic or rheumatologic applications | |
| JP2012239903A5 (en) | ||
| CN104473644A (en) | Coil control system and head and neck combined coil for magnetic resonance imaging | |
| CN115032578A (en) | Orthogonal radio frequency coil structure for head magnetic resonance imaging | |
| JP6887346B2 (en) | High frequency coil unit and magnetic resonance imaging device | |
| US20220236353A1 (en) | Dipole antenna array for hybrid mr-pet and mr-spect scans and use thereof, and mr-pet or mr-spect tomograph with a dipole antenna array | |
| KR102324731B1 (en) | Receiving coil for magnetic resonance imaging device | |
| CN1786730A (en) | Apparatus of animal radio-frequency coil for magnetic resonance imaging system | |
| KR101856376B1 (en) | Multi- channel Helmholtz coil for magnetic resonance imaging and magnetic resonance imaging system | |
| CN204613381U (en) | Built-in magnetic resonant RF receiving coil | |
| KR101856375B1 (en) | Dipole antenna for magnetic resonance imaging, radio frequency coil assembly, and magnetic resonance imaging system | |
| WO2013148310A1 (en) | Mri scanner | |
| CN115219967A (en) | Shaped RF coil assembly for magnetic resonance system | |
| CN201398970Y (en) | Shoulder coil | |
| Zhu et al. | A detunable wireless resonator insert for high-resolution TMJ MRI at 1.5 T |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |