CN110488211A - A kind of adjustable birdcage-type radio frequency coil for MRI MRS - Google Patents
A kind of adjustable birdcage-type radio frequency coil for MRI MRS Download PDFInfo
- Publication number
- CN110488211A CN110488211A CN201910819798.5A CN201910819798A CN110488211A CN 110488211 A CN110488211 A CN 110488211A CN 201910819798 A CN201910819798 A CN 201910819798A CN 110488211 A CN110488211 A CN 110488211A
- Authority
- CN
- China
- Prior art keywords
- end ring
- crosspiece
- switch
- radio frequency
- birdcage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
- G01R33/34046—Volume type coils, e.g. bird-cage coils; Quadrature bird-cage coils; Circularly polarised coils
- G01R33/34076—Birdcage coils
Abstract
The invention discloses a kind of adjustable birdcage-type radio frequency coils for MRI MRS, it include: including surrounding the switch between the end ring of annular, the crosspiece of each end ring of connection, end ring and crosspiece, when the switch is opened, end ring will be made to fail, the end ring is connected by crosspiece, and the crosspiece is coupled between end ring, is divided by switch, by changing the state of switch, the structure of transmitting coil will change and generate different radio-frequency drive fields or different resonance frequencies.It realizes tunable radio frequency exciting field size and has the function of the transmitting coil of different stimulating frequencies, the excitation that proton is imaged except actual scanning range is limited to reduce artifact, and systematic difference range is expanded to from the acquisition of the sub- 1H signal of simple substance the acquisition of multicore signal.
Description
Technical field
The present invention relates to coil component field, in particular to a kind of adjustable birdcage-type radio frequency coil for MRI MRS.
Background technique
Magnetic resonance imaging system includes with lower component: 1 generates stable and uniform magnetic field magnet；2 generate excitation radiofrequency field
The radio-frequency sending coil of (B1)；3 receive the receiving coil of radiofrequency signal；4 provide the gradient coil of spatial orientation information；5 use
In the computer of control system and reconstruction image.
There is biggish fixed excitation currently used for birdcage excitation variable winding used by clinical magnetic resonance imaging system
Field is clinical for scanning requirement on a large scale to meet, however when actual scanning range is smaller, it can also excite required model
It encloses with exterior domain.Simultaneously because the inhomogeneities in the non-linear and magnetic field of gradient coil, system will likely receive required range
Signal in addition, and artifact is generated in the picture.Because different protons is in different resonance frequencies, clinical magnetic resonance at
As system be typically only capable to collect 1H proton signal, although 31P, 13C, 23Na, 19F, 7LI proton can also generate magnetic resonance letter
Number, and there is clinical meaning.
Summary of the invention
For above-mentioned deficiency in the prior art, the present invention provides a kind of adjustable birdcage-type radio frequencies for MRI MRS
Coil realizes tunable radio frequency exciting field size and has the function of the transmitting coil of different stimulating frequencies, limits actual scanning
The excitation that proton is imaged except range is to reduce artifact, and systematic difference range from the sub- 1H signal of simple substance
Acquisition expands to the acquisition of multicore signal.
In order to achieve the above object of the invention, the technical solution adopted by the present invention are as follows:
A kind of adjustable birdcage-type radio frequency coil for MRI MRS, comprising: end ring, connection including surrounding annular are each
Switch between the crosspiece of end ring, end ring and crosspiece will make end ring fail when the switch is opened, and the end ring is connected by crosspiece,
The crosspiece is coupled between end ring, is divided by switch, and by changing the state of switch, the structure of transmitting coil will change and produce
Raw different radio-frequency drive field or different resonance frequencies.
Further, the switch can be machinery, be also possible to electronic.
The invention has the benefit that
It realizes tunable radio frequency exciting field size and has the function of the transmitting coil of different stimulating frequencies, limit and actually sweep
The excitation that proton is imaged except range is retouched to reduce artifact, and systematic difference range from the sub- 1H signal of simple substance
Acquisition expand to the acquisition of multicore signal.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the schematic equivalent circuit of the adjustable birdcage-type radio frequency coil of the present invention；
Fig. 3 is the schematic diagram of the embodiment of the present invention one；
Fig. 4 is the schematic diagram of the embodiment of the present invention two；
Fig. 5 is one simulation result diagram of the embodiment of the present invention；
Fig. 6 is two simulation result diagram of the embodiment of the present invention；
The appended drawing reference table of comparisons:
1- end ring, 2- crosspiece, 3- switch, the first end ring of 4-, the second end ring of 5-, 6- third end ring, the 4th end ring of 7-.
Specific embodiment
Further illustrate a specific embodiment of the invention with reference to the accompanying drawing.Wherein identical components are with identical
Appended drawing reference indicates.
It should be noted that word "front", "rear" used in the following description, "left", "right", "up" and "down" refer to
Direction in attached drawing, word "inner" and "outside" refer respectively to the direction towards or away from geometric center of specific component.
In order that the present invention can be more clearly and readily understood, following will be combined with the drawings in the embodiments of the present invention,
Technical scheme in the embodiment of the invention is clearly and completely described.
As shown in Figures 1 to 6, a kind of adjustable birdcage-type radio frequency coil for MRI MRS, comprising: including surrounding annular
End ring 1, the crosspiece 2 of each end ring of connection, the switch 3 between end ring 1 and crosspiece 2 lose end ring 1 when switch 3 is opened
Effect, the end ring 1 are connected by crosspiece 2, and the crosspiece 2 is coupled between end ring 1, are divided by switch 3, by changing switch 3
The structure of state, transmitting coil will change and generate different radio-frequency drive fields or different resonance frequencies.
The switch 3 can be machinery, be also possible to electronic.
Embodiment one:
Fig. 2 is combined as shown in Figure 3, and in the present embodiment, the switch among the crosspiece and the second end ring of the connection of the first end ring breaks
It opens；Third end ring with and the crosspiece that connect of the 4th end ring among switch disconnect, between the second end ring, third end ring and two end ring
Crosspiece constitute one with small scanning range resonance frequency be f1 radio-frequency coil.
Embodiment two:
Fig. 2 is combined as shown in Figure 4, and in the present embodiment, the switch between the second end ring is all off, between third end ring
It switchs all off；Crosspiece between first end ring, the 4th end ring and two end ring, which constitutes one, has the range resonance that exposes thoroughly
Frequency is the radio-frequency coil of f2.
As shown in Figure 5, Figure 6 by using HFSS simulation software, the effect of the embodiment of the present invention one and example two is carried out
Simulation calculation, simulation result show the adjusting of the present invention achievable exciting field size and frequency.
The above description is only a preferred embodiment of the patent of the present invention, is not intended to limit the invention patent, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the invention patent within the spirit and principle of patent of invention
Protection scope within.
Claims (2)
1. a kind of adjustable birdcage-type radio frequency coil for MRI MRS characterized by comprising the end ring including surrounding annular
(1), the switch (3) between the crosspiece (2), end ring (1) and crosspiece (2) of each end ring is connected, when switch (3) are opened, will be made
End ring (1) failure, the end ring (1) are connected by crosspiece (2), and the crosspiece (2) is coupled between end ring (1), by switching (3) point
It cuts, by changing the state of switch (3), the structure of transmitting coil will change and generate different radio-frequency drive field or different humorous
Vibration frequency.
2. a kind of adjustable birdcage-type radio frequency coil for MRI MRS according to claim 1, it is characterised in that: described
Switch (3) can be machinery, be also possible to electronic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910819798.5A CN110488211A (en) | 2019-08-31 | 2019-08-31 | A kind of adjustable birdcage-type radio frequency coil for MRI MRS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910819798.5A CN110488211A (en) | 2019-08-31 | 2019-08-31 | A kind of adjustable birdcage-type radio frequency coil for MRI MRS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110488211A true CN110488211A (en) | 2019-11-22 |
Family
ID=68555976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910819798.5A Pending CN110488211A (en) | 2019-08-31 | 2019-08-31 | A kind of adjustable birdcage-type radio frequency coil for MRI MRS |
Country Status (1)
| Country | Link |
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| CN (1) | CN110488211A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113504494A (en) * | 2021-07-23 | 2021-10-15 | 深圳先进技术研究院 | Four-end ring birdcage radio frequency coil system supporting three-nuclide imaging |
| CN113608155A (en) * | 2021-08-23 | 2021-11-05 | 深圳先进技术研究院 | Magnetic resonance multi-core radio frequency coil device, control method and magnetic resonance imaging system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5990681A (en) * | 1997-10-15 | 1999-11-23 | Picker International, Inc. | Low-cost, snap-in whole-body RF coil with mechanically switchable resonant frequencies |
| CN1534305A (en) * | 2003-03-28 | 2004-10-06 | 西门子公司 | Magnetic resonance oscillation antenna |
| CN101169473A (en) * | 2006-10-24 | 2008-04-30 | 西门子公司 | Birdcage resonator |
| CN101198882A (en) * | 2005-06-16 | 2008-06-11 | 皇家飞利浦电子股份有限公司 | RF volume coil with selectable field of view |
| CN101819263A (en) * | 2010-03-23 | 2010-09-01 | 苏州工业园区朗润科技有限公司 | Detuning circuit and method for radio frequency transmitting coil in nuclear magnetic resonance system |
| CN106980097A (en) * | 2017-05-19 | 2017-07-25 | 深圳市特深电气有限公司 | Birdcage coil and its tuning methods for magnetic resonance imaging system |
| CN108020798A (en) * | 2016-10-28 | 2018-05-11 | 通用电气公司 | System and method for one or more persons under inspection to be carried out with magnetic resonance imaging |
-
2019
- 2019-08-31 CN CN201910819798.5A patent/CN110488211A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5990681A (en) * | 1997-10-15 | 1999-11-23 | Picker International, Inc. | Low-cost, snap-in whole-body RF coil with mechanically switchable resonant frequencies |
| CN1534305A (en) * | 2003-03-28 | 2004-10-06 | 西门子公司 | Magnetic resonance oscillation antenna |
| CN101198882A (en) * | 2005-06-16 | 2008-06-11 | 皇家飞利浦电子股份有限公司 | RF volume coil with selectable field of view |
| CN101169473A (en) * | 2006-10-24 | 2008-04-30 | 西门子公司 | Birdcage resonator |
| CN101819263A (en) * | 2010-03-23 | 2010-09-01 | 苏州工业园区朗润科技有限公司 | Detuning circuit and method for radio frequency transmitting coil in nuclear magnetic resonance system |
| CN108020798A (en) * | 2016-10-28 | 2018-05-11 | 通用电气公司 | System and method for one or more persons under inspection to be carried out with magnetic resonance imaging |
| CN106980097A (en) * | 2017-05-19 | 2017-07-25 | 深圳市特深电气有限公司 | Birdcage coil and its tuning methods for magnetic resonance imaging system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113504494A (en) * | 2021-07-23 | 2021-10-15 | 深圳先进技术研究院 | Four-end ring birdcage radio frequency coil system supporting three-nuclide imaging |
| WO2023000500A1 (en) * | 2021-07-23 | 2023-01-26 | 深圳先进技术研究院 | Four-end-ring birdcage radio frequency coil system supporting three-nuclide imaging |
| CN113608155A (en) * | 2021-08-23 | 2021-11-05 | 深圳先进技术研究院 | Magnetic resonance multi-core radio frequency coil device, control method and magnetic resonance imaging system |
| WO2023024229A1 (en) * | 2021-08-23 | 2023-03-02 | 深圳先进技术研究院 | Magnetic resonance multi-core radio frequency coil device and control method, and magnetic resonance imaging system |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191122 |
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| RJ01 | Rejection of invention patent application after publication |