CN202854312U - Decoupling inductance circuit used between coil units and magnetic resonance system - Google Patents
Decoupling inductance circuit used between coil units and magnetic resonance system Download PDFInfo
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- CN202854312U CN202854312U CN201220448714.5U CN201220448714U CN202854312U CN 202854312 U CN202854312 U CN 202854312U CN 201220448714 U CN201220448714 U CN 201220448714U CN 202854312 U CN202854312 U CN 202854312U
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- telefault
- coil unit
- uncoupling
- inductive circuit
- geometric center
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Abstract
The utility model discloses a decoupling inductance circuit used between coil units and a magnetic resonance system. The decoupling inductance circuit comprises a first coil unit, a first inductance coil connected with the first coil unit, a second coil unit, a second inductance coil connected with the second coil unit, wherein the first inductance coil and the second inductance coil are insulated from each other, and are partially staggered. According to the decoupling inductance circuit provided by the utility model, the decoupling inductance coils are partially staggered, and the capacitance effect areas of the two inductance coils are reduced, thereby reducing the parasitic capacitance generated by overlapping the two coil units, and achieving the purpose of inductance decoupling.
Description
Technical field
The utility model relates to a kind of uncoupling inductive circuit, relates in particular to a kind of for the uncoupling inductive circuit between coil unit and use the magnetic resonance system of this circuit.
Background technology
In mr imaging technique, the characteristic of revolving that has owing to magnetic field, for two nonopiate coils (current loop), will inevitably there be magnetic coupling, and the coupling between the coil unit can cause signal to noise ratio (S/N ratio) decline maybe can not reflect real image, therefore must take the uncoupling measure in the multi-coil unit.The at present decoupling between the coil unit roughly has following several method: capacitor decoupling, inductance decoupling, Overlap decoupling and prime amplifier decoupling.General employing Overlap decoupling between the adjacent coil unit is general with electric capacity, inductance decoupling or prime amplifier decoupling between the inferior adjacent coil unit.
About the inductance decoupling, when the overlapping distribution of telefault, be subjected to the impact of space and size, when closer or telefault is wider when the distance between two telefaults, the parasitic capacitance effect that produces will be apparent in view, such as in flexible PCB, the decoupling inductor coil is close to the both sides of soft board or base material, because the interlayer of soft board is very thin, is generally less than 0.08mm, simultaneously, the uncoupling inductance is the part of coil unit, if telefault is very narrow, the loss meeting increases, affect signal to noise ratio (S/N ratio), therefore the copper sheet of making inductance will have certain width, and aforesaid situation can cause parasitic capacitance effect very strong, can be more obvious when particularly the copper used of levels inductance is wider, so just do not reach the purpose of decoupling between the unit.
In magnetic resonance system, existing uncoupling inductive circuit comprises the decoupling part between First Line coil unit 1, the second coil unit 2 and two coil units as shown in Figure 1.The decoupling part is comprised of two telefaults, is connected with the second coil unit 2 with First Line coil unit 1 respectively.These two telefaults have certain width 1mm ~ 2mm usually, and two telefaults lay respectively at the two sides of flexible PCB 5, and its distance is generally 0.08mm for a.The radius of inductance is r, and its numerical value is relevant with the degree of coupling of First Line coil unit 1 and the second coil unit 2.
The below is with r=5mm, and inductance is wide for 1mm is example, calculates the parasitic capacitance value that produces:
By C=ε * S/d, can get,
ε=3.5*ε
0=3.5*8.854187818*10
-12f/m=31*10
-12f/m
S＝pi*(6*6-5*5)=34.56mm
2
C=13.4pf
Therefore, because two inductance is overlapping, can produce stray capacitance, be unfavorable for the decoupling of First Line coil unit 1 and the second coil unit 2, even can cause the decoupling inefficacy.Therefore, be necessary existing uncoupling inductive circuit is improved.
The utility model content
Technical problem to be solved in the utility model provides a kind of for the uncoupling inductive circuit between coil unit and use the magnetic resonance system of this circuit, can effectively reduce the stray capacitance of two overlapping generations of coil unit, thereby reach the purpose of inductance decoupling.
The utility model is to solve the problems of the technologies described above the technical scheme that adopts to provide a kind of for the uncoupling inductive circuit between coil unit, comprise First Line coil unit and the first telefault, the second coil unit that link to each other with described First Line coil unit and the second telefault that links to each other with described the second coil unit, the setting adjoining and insulated from each other of described the first telefault and the second telefault, wherein, the dislocation of described the first telefault and the second inductance coils part ground separately.
Further, described the first telefault lays respectively on two parallel planes with the second telefault.
Further, described uncoupling inductive circuit is distributed on the circuit board.
Further, described circuit board is flexible PCB, and described the first telefault and the second inductor wire are distributed in the both sides of described flexible PCB.
Further, described circuit board is printed circuit board (PCB), and described the first telefault and the second telefault are distributed in a side of described printed circuit board (PCB).
Further, described the first telefault and the second telefault are outside equipped with insulation course, and described the first telefault and the second telefault are close to a side that is distributed in described printed circuit board (PCB).
Further, the radius of described the first telefault and the second telefault is 2mm～8mm.
Further, the width of described the first telefault and the second telefault is 0.5mm～2mm.
Further, the number of turn of described the first telefault and the second telefault is 1.
Further, relative extension forms respectively the first telefault and the second telefault to described First Line coil unit to the centre with the second coil unit.
Further, described the first telefault, the second telefault are the coil that forms by winding mode.
Further, described the first telefault has the first geometric center lines, and described the second telefault has the second geometric center lines, and described the first geometric center lines does not overlap with described the second geometric center lines.
Further, described the first geometric center lines is by described the first telefault geometric center and the line vertical with plane, described the first telefault place, and described the second geometric center lines is by described the second telefault geometric center and the line vertical with plane, described the second coil place.
Further, described the first geometric center lines parallels with the second geometric center lines.
Further, described the first telefault, the second telefault are circle, rectangle or ellipsoidal structure, and the geometric center of described circle, rectangle, oval telefault is respectively the intersection point of the center of circle, rectangle two cornerwise intersection points, transverse and minor axis.
Further, the shape of described the first telefault, the second telefault, size are all identical.
The utility model is to solve the problems of the technologies described above another technical scheme that adopts to provide a kind of magnetic resonance system, comprises a plurality of above-mentioned for the uncoupling inductive circuit between coil unit.
Further, described First Line coil unit, the second coil unit are for being used for two adjacent coil units of NMR system.
The utility model contrast prior art has following beneficial effect: uncoupling inductive circuit and magnetic resonance system that the utility model provides, the first telefault and the second telefault forming section that is dislocatedly distributed is overlapping, thereby effectively reduce the stray capacitance of two overlapping generations of coil unit, reach the purpose of inductance decoupling.
Description of drawings
Fig. 1 is the existing uncoupling inductive circuit structural representation that is used between coil unit;
Fig. 2 is that the utility model is used for the uncoupling inductive circuit structural representation between coil unit.
Among the figure:
1 First Line coil unit, 2 second coil units, 3 first telefaults
4 second telefaults, 5 circuit boards, 6 first geometric center lines
7 second geometric center lines, 8 first telefault geometric centers, 9 second telefault geometric centers
Embodiment
The utility model will be further described below in conjunction with drawings and Examples.
As shown in Figure 2, the utility model provides is used for uncoupling inductive circuit between coil unit, comprise First Line coil unit 1 and the first telefault 3, the second coil unit 2 that link to each other with First Line coil unit 1 and the second telefault 4 that links to each other with the second coil unit 2, the first telefault 3 and 4 settings adjoining and insulated from each other of the second telefault, and partly dislocation separates.
So-called the first telefault 3 and 4 settings insulated from each other of the second telefault, refer to that the first telefault 3 and the second telefault 4 surfaces are provided with insulation course, perhaps keep certain spacing between the first telefault 3 and the second telefault 4, perhaps separate with insulating bodies between the first telefault 3 and the second telefault 4, such as circuit board 5.
As shown in Figure 2, the first telefault 3 has the first geometric center lines 6, the second telefaults 4 and has the second geometric center lines 7.The first geometric center lines 6 refers to by the geometric center 8 of the first telefault 3 and the line vertical with plane, the first telefault 3 place; The second geometric center lines 7 refers to by the geometric center 9 of the second telefault 4 and the line vertical with plane, the second telefault 4 place.Of particular note, because Fig. 2 is the front view of the first telefault 3, the second telefault 4 in the uncoupling inductive circuit, so corresponding the first geometric center lines 6, the second geometric center lines 7 are approximated to " point " shape.
When the first geometric center lines 6 that has when the first telefault 3 does not overlap with the second geometric center lines 7 that the second telefault 4 has, the first telefault 3 and 4 dislocation of the second telefault are separated, preferably, the first geometric center lines 6 that the first telefault 3 has is parallel with the second geometric center lines 7 that the second telefault 4 has, and namely the first telefault 3 lays respectively on two parallel planes with the second telefault 4.
So-called the first telefault 3 and the second telefault 4 partly are dislocatedly distributed, refer to that the first telefault 3 and the second telefault 4 are close to each other, and its orthogonal projection has overlapping part at the same geometrical plane parallel with First Line coil unit 1 or the second coil unit 2.
Described uncoupling inductive circuit is distributed on the circuit board 5, circuit board 5 can be flexible PCB or other circuit boards such as printed circuit board (PCB), preferably, when circuit board 5 is flexible PCB, the first telefault 3 and the second inductor wire 4 are distributed in the both sides of flexible PCB, First Line coil unit 1 and the first telefault 3 of this moment together are distributed in flexible PCB the same side, and the second coil unit 2 and the second telefault 4 together are distributed in the opposite side of flexible PCB.When circuit board 5 was printed circuit board (PCB), the first telefault 3 and the second telefault 4 were distributed in a side of printed circuit board (PCB).When the surface of the first telefault 3 and the second telefault 4 is provided with insulation course, the first telefault 3 and the second telefault 4 can be close to up and down, and parallel misalignment distributes, when the surface of the first telefault 3 and the second telefault 4 does not arrange insulation course, keep certain spacing to arrange to guarantee to insulate between the first telefault 3 and the second telefault 4 between the first telefault 3 and the second telefault 4.
The first telefault 3, the second telefault 4 can be respectively the part of First Line coil unit 1, the second coil unit 2, and relative extension forms respectively to the centre with the second coil unit 2 by First Line coil unit 1; The coil that the first telefault 3, the second telefault 4 also can form for the mode by coiling, and be connected with First Line coil unit 1 and the second coil unit 2 respectively.
The first telefault 3, the second telefault 4 can be the structures such as circle, rectangle, ellipse, and preferably, the shape of the first telefault 3, the second telefault 4 is identical, and equal and opposite in direction is all circle.When the first telefault 3 and the second telefault 4 were all circle or rectangle or the structure such as oval, then the geometric center 9 of the geometric center 8 of the first telefault 3 and the second telefault 4 was the intersection point of the center of circle or rectangle two cornerwise intersection points or transverse and minor axis.
The utility model also provides the magnetic resonance system that uses above-mentioned a plurality of uncoupling inductive circuits, First Line coil unit 1, the second coil unit 2 can be for being used for two non-adjacent coil units of NMR system, preferably, First Line coil unit 1, the second coil unit 2 are for being used for any two adjacent coil units of magnetic resonance system.Such as coil unit a, b, c, the d that four are arranged in order, generalized case only has between inferior adjacent windings unit a, the c and between inferior adjacent windings unit b, the d needs decoupling, need the possibility of decoupling smaller between coil unit a, the d, certainly can not get rid of the possibility that it needs decoupling, but for the inductance decoupling, be commonly used between time adjacent windings unit a, the c and the decoupling between inferior adjacent windings unit b, the d.For the signal to noise ratio (S/N ratio) that improves magnetic resonance system and the loss that reduces coil; the first telefault 3 and the second telefault 4 have certain width 0.5mm～2mm usually; the first telefault 3 and the second telefault 4 are close to respectively the both sides of flexible PCB; it is r apart from the radius that a is generally 0.08mm. the first telefault 3 and the second telefault 4; the numerical value of radius r is relevant with the degree of coupling of First Line coil unit 1 and the second coil unit 2; in the present embodiment, preferred radius r is 2mm～8mm.The first telefault 3 and the second telefault 4 mutual overlapping part areas are determined by the size of First Line coil unit 1 and the second coil unit 2 and relative position, can adjust overlapping area according to actual conditions during debugging.For circuit board 5 as employing double-sided flex circuit plate, preferably, the first telefault 3 and the second telefault 4 all adopt 1 circle coil to carry out decoupling; If the telefault number of turn of the first telefault 3 and the second telefault 4 needs to increase, then should adopt the multi-layer flexible circuit board that is complementary with it.Because the inductance of the first telefault 3 and the second telefault 4 is in misalignment position, its overlapping part reduces greatly, and namely S diminishes, and the stray capacitance that this will reduce by its overlapping generation reaches the purpose of coil decoupling.
The below is equally with r=5mm, and inductance is wide for 1mm is example, calculates the parasitic capacitance value that produces.S is approximately 2mm in this case
2, by C=ε * S/d, can get
ε=3.5*ε
0=3.5*8.854187818*10
-12f/m=31*10
-12f/m
C=2.4pf
Therefore, the uncoupling inductive circuit that the utility model provides, the decoupling inductor coil is dislocatedly distributed realizes that part is overlapping, thereby effectively reduce the stray capacitance of two overlapping generations of coil unit, show after tested, stray capacitance 18% before being reduced to can reach the purpose of telefault decoupling.
Although the utility model discloses as above with preferred embodiment; so it is not to limit the utility model; any those skilled in the art; within not breaking away from spirit and scope of the present utility model; when doing a little modification and perfect, therefore protection domain of the present utility model is worked as with being as the criterion that claims were defined.
Claims (18)
1. uncoupling inductive circuit that is used between coil unit, comprise First Line coil unit and the first telefault, the second coil unit that link to each other with described First Line coil unit and the second telefault that links to each other with described the second coil unit, the setting adjoining and insulated from each other of described the first telefault and the second telefault, it is characterized in that, described the first telefault and the dislocation of the second inductance coils part ground are separately.
2. as claimed in claim 1ly it is characterized in that for the uncoupling inductive circuit between coil unit, described the first telefault lays respectively on two parallel planes with the second telefault.
3. as claimed in claim 1ly it is characterized in that for the uncoupling inductive circuit between coil unit, described uncoupling inductive circuit is distributed on the circuit board.
4. as claimed in claim 3ly it is characterized in that for the uncoupling inductive circuit between coil unit, described circuit board is flexible PCB, and described the first telefault and the second inductor wire are distributed in the both sides of described flexible PCB.
5. as claimed in claim 3ly it is characterized in that for the uncoupling inductive circuit between coil unit, described circuit board is printed circuit board (PCB), and described the first telefault and the second telefault are distributed in a side of described printed circuit board (PCB).
6. as claimed in claim 5 for the uncoupling inductive circuit between coil unit, it is characterized in that, described the first telefault and the second telefault are outside equipped with insulation course, and described the first telefault and the second telefault are close to a side that is distributed in described printed circuit board (PCB).
7. as claimed in claim 1ly it is characterized in that for the uncoupling inductive circuit between coil unit, the radius of described the first telefault and the second telefault is 2mm～8mm.
8. as claimed in claim 1ly it is characterized in that for the uncoupling inductive circuit between coil unit, the width of described the first telefault and the second telefault is 0.5mm～2mm.
9. as claimed in claim 1ly it is characterized in that for the uncoupling inductive circuit between coil unit, the number of turn of described the first telefault and the second telefault is 1.
10. each is described for the uncoupling inductive circuit between coil unit such as claim 1 to 9, and its feature is being, relative extension forms respectively the first telefault and the second telefault to described First Line coil unit to the centre with the second coil unit.
11. each describedly is characterized in that for the uncoupling inductive circuit between coil unit such as claim 1 to 9, described the first telefault, the second telefault are the coil that forms by winding mode.
12. as claimed in claim 1 for the uncoupling inductive circuit between coil unit, it is characterized in that, described the first telefault has the first geometric center lines, and described the second telefault has the second geometric center lines, and described the first geometric center lines does not overlap with described the second geometric center lines.
13. as claimed in claim 12 for the uncoupling inductive circuit between coil unit, it is characterized in that, described the first geometric center lines is by described the first telefault geometric center and the line vertical with plane, described the first telefault place, and described the second geometric center lines is by described the second telefault geometric center and the line vertical with plane, described the second coil place.
14. as claimed in claim 13ly it is characterized in that for the uncoupling inductive circuit between coil unit, described the first geometric center lines parallels with the second geometric center lines.
15. as claimed in claim 13 for the uncoupling inductive circuit between coil unit, it is characterized in that, described the first telefault, the second telefault are circle, rectangle or ellipsoidal structure, and the geometric center of described circle, rectangle, oval telefault is respectively the intersection point of the center of circle, rectangle two cornerwise intersection points, transverse and minor axis.
16. as claimed in claim 13ly it is characterized in that for the uncoupling inductive circuit between coil unit, shape, the size of described the first telefault, the second telefault are all identical.
17. a magnetic resonance system is characterized in that, comprises a plurality of as claimed in claim 1 for the uncoupling inductive circuit between coil unit.
18. magnetic resonance system as claimed in claim 17 is characterized in that, described First Line coil unit, the second coil unit are for being used for two adjacent coil units of magnetic resonance system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201220448714.5U CN202854312U (en) | 2012-09-04 | 2012-09-04 | Decoupling inductance circuit used between coil units and magnetic resonance system |
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| CN201220448714.5U CN202854312U (en) | 2012-09-04 | 2012-09-04 | Decoupling inductance circuit used between coil units and magnetic resonance system |
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| CN202854312U true CN202854312U (en) | 2013-04-03 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104517941A (en) * | 2013-09-29 | 2015-04-15 | 澜起科技（上海）有限公司 | Coil applied to inductance components and method for manufacturing coil |
| CN104783795A (en) * | 2014-01-22 | 2015-07-22 | 上海辰光医疗科技股份有限公司 | Magnetic resonance radio frequency receiving coil with coil unit isolating function |
| CN111208459A (en) * | 2020-02-19 | 2020-05-29 | 武汉联影生命科学仪器有限公司 | Magnetic resonance radio frequency coil, magnetic resonance device and magnetic resonance radio frequency coil decoupling method |
| CN113917548A (en) * | 2021-09-27 | 2022-01-11 | 吉林大学 | Decoupling device and method for receiving coils of array of magnetic resonance water detector |
-
2012
- 2012-09-04 CN CN201220448714.5U patent/CN202854312U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104517941A (en) * | 2013-09-29 | 2015-04-15 | 澜起科技（上海）有限公司 | Coil applied to inductance components and method for manufacturing coil |
| CN104517941B (en) * | 2013-09-29 | 2018-12-28 | 澜起科技股份有限公司 | Coil and application and preparation are in the method for the coil of inductance element |
| CN104783795A (en) * | 2014-01-22 | 2015-07-22 | 上海辰光医疗科技股份有限公司 | Magnetic resonance radio frequency receiving coil with coil unit isolating function |
| CN111208459A (en) * | 2020-02-19 | 2020-05-29 | 武汉联影生命科学仪器有限公司 | Magnetic resonance radio frequency coil, magnetic resonance device and magnetic resonance radio frequency coil decoupling method |
| CN113917548A (en) * | 2021-09-27 | 2022-01-11 | 吉林大学 | Decoupling device and method for receiving coils of array of magnetic resonance water detector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170331 Address after: 518000 room C, building 202-207, No.1 building, No. six Nanshan District Road, Shenzhen, Guangdong, China Patentee after: SHENZHEN UNITED IMAGING HEALTHCARE Co.,Ltd. Address before: 201815 Shanghai City, Jiading District Jiading Industrial Zone No. 1180 Building 8 Hing Road Patentee before: SHANGHAI UNITED IMAGING HEALTHCARE Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130403 |
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| CX01 | Expiry of patent term |