CN106468767A - Balance drive formula magnetic resonance radio frequency coil based on microstrip line - Google Patents
Balance drive formula magnetic resonance radio frequency coil based on microstrip line Download PDFInfo
- Publication number
- CN106468767A CN106468767A CN201610805739.9A CN201610805739A CN106468767A CN 106468767 A CN106468767 A CN 106468767A CN 201610805739 A CN201610805739 A CN 201610805739A CN 106468767 A CN106468767 A CN 106468767A
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- microstrip line
- center conductor
- frequency coil
- electric capacity
- magnetic resonance
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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
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
- G01R33/343—Constructional details, e.g. resonators, specially adapted to MR of slotted-tube or loop-gap type
-
- 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
- G01R33/36—Electrical details, e.g. matching or coupling of the coil to the receiver
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- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
Invention provides a kind of balance drive formula magnetic resonance radio frequency coil based on microstrip line, described magnetic resonance radio frequency coil is made up of the microstrip line of circular symmetric, described microstrip line includes medium substrate, earth plate and center conductor, wherein medium substrate is symmetrically annular, earth plate is located at the back side of medium substrate, and center conductor is located at the front of medium substrate.The centre of the two ends of microstrip line and center conductor is equipped with capacitor for adjusting the frequency of microstrip line, and microstrip line is connected with follow-up receptor or driver by the way of the balance drive of center.Using structure of the present invention and type of drive, the magnetic field of radio-frequency coil covers the area axially extending to entirely annular covering from n-conductor cable n wherein, and then extends the imageable area of single coil unit.
Description
Technical field
The present invention relates to a kind of radio-frequency coil, and in particular to a kind of balanced type drive-type radio-frequency coil, belongs to magnetic resonance
As field.
Background technology
Nuclear magnetic resonance is using the phenomenon that can produce Larmor precession when proton is placed in external magnetic field, thus obtaining proton
A kind of imaging means in the positional information of spatial distribution.Need in its imaging process to rely on to be wrapped in penetrating outside imaging object
Frequency coil carries out transmitting and the reception of electromagnetic wave.Nuclear magnetic resonance has become as a kind of very important medical diagnostic method, and
And because it does not produce the characteristic of no ionizing radiation, be widely used in medicine clinical research and diagnosis, and be greatly promoted doctor
Learn the development of iconography.But the radiofrequency signal that MR imaging apparatus collect is very faint, its imaging scope and signal to noise ratio
All affected by radio-frequency coil.As signal receiving sensor, radio-frequency coil is one of determiner of image quality, and one
It is directly a focus in MR investigation field.
The radio-frequency coil that magnetic resonance is used is made up of basic conductor element, has both played and has excited magnetic resonance radio frequency signal
Effect, plays the effect receiving magnetic resonance signal again, is one of core component of magnetic resonance system.Microstrip line is because make letter
Single, low cost, also there is extensive utilization in magnetic resonance imaging arts.Conventional micro-strip coil is in a medium substrate (such as
Politef or air) upper and lower surface enclose two thin metal layers respectively, its face width great thing earth plate,
Another side width is less, and as center conductor, it utilizes microstrip line or coaxial line probe to patch, in conductor patch with connect
Radio frequency electromagnetic field has been encouraged between floor.For the width of earth plate and center conductor, typically require the width of earth plate remote
Width more than center conductor.
Traditional can be used for the transmitting of radiofrequency signal and reception in magnetic resonance based on the radio-frequency coil of microstrip line, coil
Two ends are respectively arranged with electric capacity, and for adjusting the resonant frequency of coil, and center conductor is then a complete copper cash, not
Electric capacity is located on center conductor.Traditional microstrip line adopt single-ended unbalanced driving, one end of microstrip line as drive end,
On this drive end, the earth plate of microstrip line, as zero potential point, accesses the earth terminal of driver, the center conductor of microstrip line
Drive point as potential, access the signal end of driver.When using as receiving coil, microstrip line is linearly, and its magnetic field is only
Only cover the spatial dimension above center conductor, and the width that magnetic field covers is similar with the width of center conductor, this makes
The area that it can be imaged is less.If being used for being imaged traditional microstrip line, due to by actual spendable coil dimension
Limit, earth plate can be similar with the width of the object to be imaged, and it is earth plate width that the width of center conductor is much smaller than, at this
The effective covering to the object to be imaged cannot be realized in the case of kind.
Content of the invention
In view of this, the present invention provides a kind of balance drive formula magnetic resonance radio frequency coil based on microstrip line, by changing
The structure of microstrip line and type of drive, extend the scope of its magnetic field covering, and then increase imageable area.
The described balance drive formula magnetic resonance radio frequency coil based on microstrip line, including single microstrip line, described microstrip line
Including medium substrate, earth plate and center conductor, described earth plate is arranged at the back side of medium substrate, and center conductor is arranged at Jie
The front of matter substrate；Described medium substrate, earth plate and center conductor are the symmetrical loop configuration with opening, thus institute
The microstrip line being formed also is the symmetrical annular with opening；
One electric capacity is respectively set between the center conductor and earth plate of described microstrip line opening both sides；Simultaneously described
It is located at the intermediate point of center conductor, aforementioned four electric capacity after two electric capacity, and two capacitances in series are also equipped with center conductor
Capacitance identical；Described radio-frequency coil is connected with subsequent driver by the way of the balance drive of center.
Described microstrip line is annulus, the annular of square ring or other symmetrically shape.
The type of drive of described radio-frequency coil is：With two electric capacity on center conductor for driving point, between two electric capacity
Point be zero potential point, access driver earth terminal；In two electric capacity, another end points of any one electric capacity drives for potential
Dynamic point, accesses the signal end of driver.
Beneficial effect：
The present invention passes through to change the structure of radio-frequency coil based on microstrip line and type of drive, extends the model of its magnetic field covering
Enclose, and then increase imageable area.It is specially：In structure, the radio-frequency coil based on microstrip line is a loop configuration, enters
And extend the magnetic field area coverage of microstrip line coil so as to magnetic field covers not being confined to the space above center conductor,
But expand to the superjacent air space of the whole annular of center conductor composition；In type of drive, using the side of center balance drive
Formula is connected with follow-up receptor.
Brief description
Fig. 1 is the overall structure diagram of the present invention.
Wherein：1- center conductor, 2- earth plate, 3- electric capacity, 4- potential drive point, 5- zero potential point
Specific embodiment
Develop simultaneously embodiment below in conjunction with the accompanying drawings, describes the present invention.
The present embodiment provide a kind of can balance drive formula magnetic resonance radio frequency coil based on microstrip line, to solve traditional base
It is impossible to realize the problem to the effective covering of the object to be imaged when radio-frequency coil of microstrip line uses as receiving coil.
As shown in figure 1, this magnetic resonance radio frequency coil is made up of single microstrip line, described microstrip line includes：Medium substrate, connect
Floor 2 and center conductor 1, wherein medium substrate are the symmetrical loop configuration with opening, and described loop configuration can be
Annulus, square loop or other symmetrical annular, as shown in figure 1, adopt in the present embodiment for square loop.Medium substrate
Using the good material of insulating properties, can be using politef, pottery or air, the thickness one of medium substrate in practical application
As in 5mm-15mm.Described earth plate 2 is located at the back side of medium substrate, and center conductor 1 is arranged at the front of medium substrate, thus
The microstrip line being formed also is the symmetrical annular with opening.Described microstrip line is set to loop configuration, can extend micro-
The magnetic field area coverage of band wire coil is so as to magnetic field covers the space being no longer limited to against center conductor 1 top, but extension
The superjacent air space of the whole loop configuration constituting to center conductor 1.
Four electric capacity 3 for adjusting microstrip line frequency are provided with described microstrip line, two of which is located at micro- respectively
Between the two ends center conductor 1 of band wire opening and earth plate 2, on centrally disposed wire 1 after two other capacitances in series, and position
In center conductor 1 intermediate point (due to being provided with electric capacity on center conductor 1, center conductor is no longer a complete copper cash,
But separated by two electric capacity), as shown in figure 1, because microstrip line is symmetrical loop configuration, two on center conductor 1
Individual electric capacity is relative with two electric capacity positioned at microstrip line opening.The capacitance of four described electric capacity is identical.
Described microstrip line is connected with follow-up receptor by the way of the balance drive of center, specially：No longer adopt
The end points of microstrip line is as driving point, but with two electric capacity on center conductor 1 for driving point, the point between two electric capacity is
Zero potential point 5, accesses the earth terminal of driver, drives point 4 using another end points of wherein any one electric capacity as potential, connects
Enter the signal end of driver.
In sum, these are only presently preferred embodiments of the present invention, be not intended to limit protection scope of the present invention.
All any modification, equivalent substitution and improvement within the spirit and principles in the present invention, made etc., should be included in the present invention's
Within protection domain.
Claims (3)
1. the balance drive formula magnetic resonance radio frequency coil based on microstrip line, including single microstrip line, described microstrip line includes medium
Substrate, earth plate and center conductor, described earth plate is arranged at the back side of medium substrate, and center conductor is arranged at medium substrate
Front；It is characterized in that, described medium substrate, earth plate and center conductor are the symmetrical loop configuration with opening, by
The microstrip line that this is formed also is the symmetrical annular with opening；
One electric capacity is respectively set between the center conductor and earth plate of described microstrip line opening both sides；Simultaneously at described center
It is located at the intermediate point of center conductor, the electricity of aforementioned four electric capacity after two electric capacity, and two capacitances in series are also equipped with wire
Capacitance is identical；Described radio-frequency coil is connected with subsequent driver by the way of the balance drive of center.
2. the balance drive formula magnetic resonance radio frequency coil based on microstrip line as claimed in claim 1 it is characterised in that：Described micro-
Band wire is annulus, the annular of square ring or other symmetrically shape.
3. the balance drive formula magnetic resonance radio frequency coil based on microstrip line as claimed in claim 1 or 2 it is characterised in that：Institute
The type of drive stating radio-frequency coil is：With two electric capacity on center conductor for driving point, the point between two electric capacity is zero electricity
Gesture point, accesses the earth terminal of driver；In two electric capacity, another end points of any one electric capacity drives point for potential, accesses and drives
The signal end of dynamic device.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2016103680970 | 2016-05-30 | ||
| CN201610368097 | 2016-05-30 |
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| Publication Number | Publication Date |
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| CN106468767A true CN106468767A (en) | 2017-03-01 |
| CN106468767B CN106468767B (en) | 2018-09-28 |
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| CN201610805739.9A Active CN106468767B (en) | 2016-05-30 | 2016-09-06 | Balance drive formula magnetic resonance radio frequency coil based on microstrip line |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107589386A (en) * | 2017-09-01 | 2018-01-16 | 石建国 | A kind of adaptive RF coil and the coil array for being easy to wearing |
| CN110873854A (en) * | 2018-08-29 | 2020-03-10 | 上海联影医疗科技有限公司 | Magnetic resonance receiving coil and magnetic resonance receiving coil assembly |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0325351A2 (en) * | 1988-01-19 | 1989-07-26 | The Regents Of The University Of California | Switchable MRI RF coil array with individual coils having different and overlapping fields of view |
| CN2221939Y (en) * | 1995-06-05 | 1996-03-13 | 深圳安科高技术有限公司 | Radio-frequency coil device for magnetic resonance imaging system |
| US20070152668A1 (en) * | 2006-01-04 | 2007-07-05 | Huiming Zhang | Slab-selective rf coil for mr system |
| CN101268379A (en) * | 2005-09-20 | 2008-09-17 | 皇家飞利浦电子股份有限公司 | RF traps for radio frequency coils used in MRI |
| US20090099444A1 (en) * | 2006-03-09 | 2009-04-16 | Insightmri | Microstrip Coil Designs for MRI Devices |
| CN103033778A (en) * | 2012-12-10 | 2013-04-10 | 奥泰医疗系统有限责任公司 | Dual-band radio frequency surface coil |
| CN104698411A (en) * | 2015-02-13 | 2015-06-10 | 江苏麦格思频仪器有限公司 | Multichannel radio frequency coil for open type magnetic resonance imaging system |
-
2016
- 2016-09-06 CN CN201610805739.9A patent/CN106468767B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0325351A2 (en) * | 1988-01-19 | 1989-07-26 | The Regents Of The University Of California | Switchable MRI RF coil array with individual coils having different and overlapping fields of view |
| CN2221939Y (en) * | 1995-06-05 | 1996-03-13 | 深圳安科高技术有限公司 | Radio-frequency coil device for magnetic resonance imaging system |
| CN101268379A (en) * | 2005-09-20 | 2008-09-17 | 皇家飞利浦电子股份有限公司 | RF traps for radio frequency coils used in MRI |
| US20070152668A1 (en) * | 2006-01-04 | 2007-07-05 | Huiming Zhang | Slab-selective rf coil for mr system |
| US20090099444A1 (en) * | 2006-03-09 | 2009-04-16 | Insightmri | Microstrip Coil Designs for MRI Devices |
| CN103033778A (en) * | 2012-12-10 | 2013-04-10 | 奥泰医疗系统有限责任公司 | Dual-band radio frequency surface coil |
| CN104698411A (en) * | 2015-02-13 | 2015-06-10 | 江苏麦格思频仪器有限公司 | Multichannel radio frequency coil for open type magnetic resonance imaging system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107589386A (en) * | 2017-09-01 | 2018-01-16 | 石建国 | A kind of adaptive RF coil and the coil array for being easy to wearing |
| CN110873854A (en) * | 2018-08-29 | 2020-03-10 | 上海联影医疗科技有限公司 | Magnetic resonance receiving coil and magnetic resonance receiving coil assembly |
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| Publication number | Publication date |
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| CN106468767B (en) | 2018-09-28 |
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