CN109001656A - A kind of flexible radio frequency receiving coil array - Google Patents
A kind of flexible radio frequency receiving coil array Download PDFInfo
- Publication number
- CN109001656A CN109001656A CN201810403253.1A CN201810403253A CN109001656A CN 109001656 A CN109001656 A CN 109001656A CN 201810403253 A CN201810403253 A CN 201810403253A CN 109001656 A CN109001656 A CN 109001656A
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- capacitor
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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
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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
- G01R33/36—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
The embodiment of the invention discloses a kind of flexible radio frequency receiving coil arrays, the flexible radio frequency receiving coil array is set on flexible panel, it includes several line coil units, two adjacent line coil units are staggered in several line coil units, preamplifier is provided in above-mentioned coil unit, two preamplifiers in above-mentioned flexible radio frequency receiving coil array in two neighboring coil unit are set to the installation plate of the same preamplifier on above-mentioned flexible panel, wherein, multiple preamplifier installation plates are provided on above-mentioned flexible panel, and each row and each column preamplifier installation plate is along arranged in a straight line.Compared to existing technologies, the embodiment of the present invention can effectively reduce the distribution density of preamplifier, the flexible and maximum bending degree that ensure that coil array enables coil array to be preferably bonded human body, and then improves signal noise ratio (snr) of image and picture quality.
Description
Technical field
The present invention relates to the field of medical instrument technology more particularly to a kind of flexible radio frequency receiving coil arrays.
Background technique
Mr imaging technique is cut with hurtless measure, radiationless, multi-parameter, high-resolution, high contrast and arbitrary orientation
The advantages such as face imaging, have become an important checking tool of fetal anatomy He Pathologic changes.However due to fetus
Motility or the not autonomous of pregnant woman, scan image can generate motion artifacts.In order to reduce motion artifacts, need shorter
Time in complete image scanning.
Currently, in magnetic resonance system, the realization of fast imaging needs to rely on phased array coils technology, it is general come
It says, coil unit number is more, and system in parallel acceleration capacity is stronger, i.e., the signal noise ratio (snr) of image loss in the case of high accelerated factor is got over
It is few, but with the increase of the increase of coil unit number and distribution density, the number and distribution density of preamplifier also with
Increase, can make coil flexibility and bending degree decline, human body can not be bonded, cause signal noise ratio (snr) of image and picture quality
Decline.
Summary of the invention
The main purpose of the embodiment of the present invention is to provide a kind of flexible radio frequency receiving coil, can solve in the prior art
Mr imaging technique signal noise ratio (snr) of image and the lower technical problem of picture quality.
To achieve the above object, the embodiment of the present invention provides a kind of flexible radio frequency receiving coil array, which connects
It receives coil array to be set on flexible panel, the flexible radio frequency receiving coil array includes several line coil units, if described
Two adjacent line coil units are staggered in dry line coil unit；
Preamplifier, two neighboring coil in the flexible radio frequency receiving coil array are provided in the coil unit
Two preamplifiers in unit are set to the installation plate of the same preamplifier on the flexible panel, wherein described
Multiple preamplifier installation plates are provided on flexible panel, and each row and each column preamplifier installation plate is along straight line
Arrangement.
Optionally, the coil unit of odd-numbered line stem and even number line tail portion in the flexible radio frequency receiving coil array
The size of coil unit be less than the size of remaining coil unit, and the both ends of odd-numbered line coil unit and even number line coil unit
Alignment.
Optionally, copper circuit, the copper circuit in the coil unit of the odd-numbered line stem are provided in the coil unit
Fixed capacity including the first preset quantity, the copper circuit in the coil unit of the even number line tail portion include the second preset quantity
Fixed capacity, first preset quantity be less than second preset quantity.
Optionally, first preset quantity is 4, and second preset quantity is 6.
Optionally, the coil unit include: passive detuned circuit, tuning circuit, active detuned circuit, match circuit,
Radio frequency sink circuit, radio-frequency choke, radio frequency coaxial-cable and uncoupling circuit；
Wherein, the passive detuned circuit, the tuning circuit, the active detuned circuit and match circuit setting
Copper circuit in the coil unit；
The radio frequency sink circuit is connect with the active detuned circuit, the radio-frequency choke and the radio frequency sink circuit string
Connection, one end of the radio frequency coaxial-cable is connect with the match circuit, the other end is connect with the uncoupling circuit, described to go
Coupling circuit are connect with the preamplifier in the coil unit.
Optionally, the passive detuned circuit includes first capacitor, the first inductance, the first diode and the second diode,
The first capacitor is set in the copper circuit of the coil unit, and first diode is in parallel with the second diode and polarity
On the contrary, first inductance is connected with first diode, the second diode, the first capacitor and first inductance,
First diode and the second diode are in parallel；
The tuning circuit includes the second capacitor and the first variable capacitance, and second capacitor is set to the coil unit
Copper circuit in, second capacitor is in parallel with first variable capacitance；
The active detuned circuit includes third capacitor, the second inductance, third diode, and the third capacitor is set to institute
It states in the copper circuit of coil unit, second inductance is connected with the third diode, the third capacitor and described second
Inductance, third diode are in parallel；
The match circuit includes the 4th capacitor and the second variable capacitance, and the 4th capacitor is set to the coil unit
Copper circuit in, the 4th capacitor is in parallel with second variable capacitance；
The radio frequency sink circuit includes the 5th capacitor and third inductance, the 5th capacitor and the third inductance in parallel；
The uncoupling circuit includes the 6th capacitor and third variable capacitance, and the 6th capacitor and the third can power transformations
Hold in parallel.
Optionally, the flexible panel includes flexible circuit board and flexible mounting plate, and the copper circuit of the coil unit is beaten
It is imprinted on the flexible circuit board, the preamplifier installation plate is located on the flexible mounting plate.
Optionally, several through-holes are provided on the flexible panel, the through-hole is rectangle or circle.
Optionally, the flexible circuit board is made of Kapton or polyester film, and the flexible mounting plate is by gathering
Vinyl foam is made.
Flexible radio frequency receiving coil array provided by the embodiment of the present invention is set on flexible panel comprising Ruo Ganhang
Coil unit, two adjacent line coil units are staggered in several line coil units, before being provided in above-mentioned coil unit
Amplifier is set, two preamplifiers in above-mentioned flexible radio frequency receiving coil array in two neighboring coil unit are set to
State the same preamplifier installation plate on flexible panel, wherein multiple preamplifiers are provided on above-mentioned flexible panel
Plate is installed, and each row and each column preamplifier installation plate is along arranged in a straight line.Compared to existing technologies, of the invention
Two preamplifiers in two neighboring coil unit are set to the peace of the same preamplifier on flexible panel by embodiment
Loading board block, and each row and each column preamplifier installation plate on flexible panel is along arranged in a straight line, so as to effective
The distribution density for reducing preamplifier ensure that the flexible and maximum bending degree of coil array, enable coil array
It is preferably bonded human body, and then improves signal noise ratio (snr) of image and picture quality.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those skilled in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is the structural schematic diagram of flexible radio frequency receiving coil array in the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of flexible panel in the embodiment of the present invention；
Fig. 3 a is the electrical block diagram of middle line of embodiment of the present invention coil unit；
Fig. 3 b is another electrical block diagram of middle line of embodiment of the present invention coil unit.
Specific embodiment
In order to make the invention's purpose, features and advantages of the invention more obvious and easy to understand, below in conjunction with the present invention
Attached drawing in embodiment, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described reality
Applying example is only a part of the embodiment of the present invention, and not all embodiments.Based on the embodiments of the present invention, those skilled in the art
Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
The embodiment of the present invention provides a kind of flexible radio frequency receiving coil array, which is set to
On flexible panel, including several line coil units, two adjacent line coil units are staggered in above-mentioned several line coil units.
Referring to Fig. 1, Fig. 1 is the structural schematic diagram of flexible radio frequency receiving coil array in the embodiment of the present invention.
In Fig. 1, above-mentioned flexible radio frequency receiving coil array includes 4 line coil units, in order to make odd-numbered line coil unit
Be aligned with the both ends of even number line coil unit, the coil unit of odd-numbered line stem in above-mentioned flexible radio frequency receiving coil array, with
And the size of the coil unit of even number line tail portion is less than the size of other remaining coil units.
Wherein, in the present embodiment, the ruler of the coil unit of the coil unit and even number line tail portion of above-mentioned odd-numbered line stem
Very little preferably 98mm*56.5mm；Other residue coil units are preferably dimensioned to be 110mm*103mm.
Wherein, preamplifier is provided in above-mentioned coil unit, adjacent two in above-mentioned flexible radio frequency receiving coil array
Two preamplifiers in a coil unit are set to the installation plate of the same preamplifier on above-mentioned flexible panel,
In, multiple preamplifier installation plates are provided on above-mentioned flexible panel, and each row and each column preamplifier installs plate
Along arranged in a straight line.Specifically, can be by two preamplifiers in two neighboring coil unit in same line coil unit
It is set to same preamplifier installation plate, it can also be by adjacent rows coil unit, in two neighboring coil unit
Two preamplifiers are set to same preamplifier installation plate.
Embodiment in order to better understand the present invention, referring to figure 2., Fig. 2 are the knot of flexible panel in the embodiment of the present invention
Structure schematic diagram.In Fig. 2, flexible panel includes soft shell 201, several preamplifiers installation plate 202, several are logical
Hole 203, balun circuit 204, radio frequency coaxial-cable 205 and coil pins 206.
Wherein, through-hole 203 is rectangular through-hole or circular through hole, is mainly used for mitigating the weight of above-mentioned flexible panel, and also
Material can be saved.Balun circuit 204 is mainly used for controlling the electric current flowed into outside 205 shielded layer of radio frequency coaxial-cable.In addition,
In order to guarantee above-mentioned flexible radio frequency receiving coil array flexibility and biggish bending degree, the two of above-mentioned flexible panel ragged edge
Column preamplifier installs plate as close as possible to the edge of flexible panel, and 3cm is less than with a distance from flexible panel edge, remaining
Preamplifier installs plate with two column as one group, is evenly distributed on flexible panel, and two in each group arrange preceding storing
Big device installation plate is as close as possible to distance between the two is less than 2cm.
Further, copper circuit is provided in above-mentioned coil unit, the copper in the coil unit of above-mentioned odd-numbered line stem returns
Road includes the fixed capacity of the first preset quantity, and the copper circuit in the coil unit of above-mentioned even number line tail portion includes the second present count
The fixed capacity of amount, above-mentioned first preset quantity are less than second preset quantity.Wherein, in the present embodiment, above-mentioned first is pre-
If quantity is preferably 4, above-mentioned second preset quantity is preferably 6.
Wherein, the width in above-mentioned copper circuit is preferably 6mm, and thickness is preferably 1oz (0.035mm).
Further, above-mentioned flexible panel includes flexible circuit board and flexible mounting plate, the copper circuit of above-mentioned coil unit
It is printed upon on above-mentioned flexible circuit board, above-mentioned preamplifier installation plate is located on above-mentioned flexible mounting plate.Specifically, above-mentioned
Flexible mounting plate is divided into upper layer and lower layer, and thickness can choose as 10mm, and centre is above-mentioned flexible circuit board.Wherein, above-mentioned flexibility
Circuit board can be made of Kapton or polyester film, and above-mentioned flexible mounting plate can be made of polyethylene.It can
With understanding, above-mentioned flexible circuit board can also be made with flexible mounting plate of other flexible materials.
It further, is the electrical block diagram of middle line of embodiment of the present invention coil unit, this implementation referring to Fig. 3 a, Fig. 3 a
Example in, above-mentioned coil unit include: copper circuit 301, passive detuned circuit 302, tuning circuit 303, active detuned circuit 304,
Radio frequency sink circuit 305, radio-frequency choke 306, match circuit 307, radio frequency coaxial-cable 308, preamplifier 309 and uncoupling
Circuit 310；
Wherein, passive detuned circuit 302, tuning circuit 303, active detuned circuit 304 and match circuit 307 are set to line
In copper circuit 301 in coil unit；Radio frequency sink circuit 305 is connect with active detuned circuit 304, radio-frequency choke 306 and radio frequency
Sink circuit 305 is connected, and one end of radio frequency coaxial-cable is connect with match circuit 307, the other end and uncoupling circuit 310 connect,
Uncoupling circuit 310 is connect with the preamplifier 309 in coil unit.
Specifically, passive detuned circuit 302 includes first capacitor C2, the first inductance L2, the first diode and the second second level
Pipe, first capacitor C2 is set in the copper circuit 301 of coil unit, and the first diode is in parallel with the second diode and polarity phase
Instead, the first inductance L2 connects with above-mentioned first diode, the second diode, first capacitor C2 and the first inductance L2, the first second level
Pipe and the second diode are in parallel.
Tuning circuit 303 includes the second capacitor and the first variable capacitance, and the copper which is set to coil unit returns
In road 301, above-mentioned second capacitor is in parallel with above-mentioned first variable capacitance.
Active detuned circuit 304 includes third capacitor C1, the second inductance L1, third diode, and third capacitor C1 is set to
In the copper circuit 301 of above-mentioned coil unit, the second inductance L1 connects with above-mentioned third diode, third capacitor C1 and the second inductance
L1, above-mentioned third diode are in parallel.
Match circuit 307 includes the 4th capacitor and the second variable capacitance, and the 4th capacitor is set to the copper of above-mentioned coil unit
In circuit 301, and the 4th capacitor is in parallel with above-mentioned second variable capacitance.
Radio frequency sink circuit 305 includes the 5th capacitor C3 and third inductance L3, and the 5th capacitor C3 is in parallel with third inductance L3.
Uncoupling circuit 310 includes the 6th capacitor and third variable capacitance, and the 6th capacitor is in parallel with third variable capacitance.
Wherein, the calculation formula of capacitor Ci and inductance Li are as follows:Wherein i=1,2, f be coil unit
Resonant frequency of operation, C3=1nF, L3=2.7 μ H.The size inductively or capacitively not marked in above-mentioned coil unit can be through
It is obtained by experiment.The effect of above-mentioned passive detuned circuit 302 and active detuned circuit 304 is all: making radio-frequency pulse in excitation sample
When product, receiving coil does not work；When radio-frequency pulse stops excitation, receiving coil starts to receive magnetic resonance signal.In PIN diode
The effect of the increased radio frequency sink circuit 305 of offset port and radio-frequency choke 306 is: the longer interference of supply lines is prevented, to subtract
The loss of few magnetic resonance signal and reduction noise, improve signal noise ratio (snr) of image.
Wherein, coil unit shown in above-mentioned Fig. 3 a is the line of odd-numbered line stem in above-mentioned flexible radio frequency receiving coil array
Coil unit and the coil unit of even number line tail portion include four fixed capacities C1, C2, C in copper circuit01、C02。
Referring to Fig. 3 b, Fig. 3 b is another electrical block diagram of middle line of embodiment of the present invention coil unit, shown in Fig. 3 b
Coil unit is the line in above-mentioned flexible radio frequency receiving coil array except the coil unit of odd-numbered line stem and even number line tail portion
Other remaining coil units except coil unit include six fixed capacities: C1, C2, C in copper circuit03、C04、C05、C06。
Wherein, above-mentioned fixed capacity C01、C02、C03、C04、C05、C06Value size can through experiment obtain.
Flexible radio frequency receiving coil array provided by the embodiment of the present invention is set on flexible panel comprising Ruo Ganhang
Coil unit, two adjacent line coil units are staggered in several line coil units, before being provided in above-mentioned coil unit
Amplifier is set, two preamplifiers in above-mentioned flexible radio frequency receiving coil array in two neighboring coil unit are set to
State the same preamplifier installation plate on flexible panel, wherein multiple preamplifiers are provided on above-mentioned flexible panel
Plate is installed, and each row and each column preamplifier installation plate is along arranged in a straight line.Compared to existing technologies, of the invention
Two preamplifiers in two neighboring coil unit are set to the peace of the same preamplifier on flexible panel by embodiment
Loading board block, and each row and each column preamplifier installation plate on flexible panel is along arranged in a straight line, so as to effective
The distribution density for reducing preamplifier ensure that the flexible and maximum bending degree of coil array, enable coil array
It is preferably bonded human body, and then improves signal noise ratio (snr) of image and picture quality.
The above are to a kind of description of flexible radio frequency receiving coil array provided by the present invention, for the technology of this field
Personnel, thought according to an embodiment of the present invention, there will be changes in the specific implementation manner and application range, to sum up, this
Description should not be construed as limiting the invention.
Claims (9)
1. a kind of flexible radio frequency receiving coil array, which is characterized in that the flexible radio frequency receiving coil array is set to flexibility
On panel, the flexible radio frequency receiving coil array includes several line coil units, adjacent in several line coil units
Two line coil units are staggered；
Preamplifier, two neighboring coil unit in the flexible radio frequency receiving coil array are provided in the coil unit
In two preamplifiers be set to the same preamplifier on the flexible panel installation plate, wherein the flexibility
Multiple preamplifier installation plates are provided on panel, and each row and each column preamplifier installation plate is arranged along straight line
Column.
2. flexible radio frequency receiving coil array as described in claim 1, which is characterized in that the flexible radio frequency receiving coil battle array
The size of the coil unit of odd-numbered line stem and the coil unit of even number line tail portion is less than the big of remaining coil unit in column
It is small, and odd-numbered line coil unit is aligned with the both ends of even number line coil unit.
3. flexible radio frequency receiving coil array as claimed in claim 2, which is characterized in that be provided with copper in the coil unit
Circuit, the copper circuit in the coil unit of the odd-numbered line stem include the fixed capacity of the first preset quantity, the even number line
Copper circuit in the coil unit of tail portion includes the fixed capacity of the second preset quantity, and first preset quantity is less than described the
Two preset quantities.
4. flexible radio frequency receiving coil array as claimed in claim 3, which is characterized in that first preset quantity is 4,
Second preset quantity is 6.
5. flexible radio frequency receiving coil array as claimed in claim 3, which is characterized in that the coil unit includes: passive
Detuned circuit, tuning circuit, active detuned circuit, match circuit, radio frequency sink circuit, radio-frequency choke, radio frequency coaxial-cable and
Uncoupling circuit；
Wherein, the passive detuned circuit, the tuning circuit, the active detuned circuit and the match circuit are set to institute
State the copper circuit in coil unit；
The radio frequency sink circuit is connect with the active detuned circuit, and the radio-frequency choke is connected with the radio frequency sink circuit,
One end of the radio frequency coaxial-cable is connect with the match circuit, the other end is connect with the uncoupling circuit, the decoupling
Circuit is closed to connect with the preamplifier in the coil unit.
6. flexible radio frequency receiving coil array as claimed in claim 5, which is characterized in that the passive detuned circuit includes the
One capacitor, the first inductance, the first diode and the second diode, the first capacitor are set to the copper circuit of the coil unit
In, first diode is in parallel with the second diode and polarity is on the contrary, first inductance and first diode, second
Diode series connection, the first capacitor are in parallel with first inductance, the first diode and the second diode；
The tuning circuit includes the second capacitor and the first variable capacitance, and second capacitor is set to the copper of the coil unit
In circuit, second capacitor is in parallel with first variable capacitance；
The active detuned circuit includes third capacitor, the second inductance, third diode, and the third capacitor is set to the line
In the copper circuit of coil unit, second inductance is connected with the third diode, the third capacitor and second inductance,
Third diode is in parallel；
The match circuit includes the 4th capacitor and the second variable capacitance, and the 4th capacitor is set to the copper of the coil unit
In circuit, the 4th capacitor is in parallel with second variable capacitance；
The radio frequency sink circuit includes the 5th capacitor and third inductance, the 5th capacitor and the third inductance in parallel；
The uncoupling circuit includes the 6th capacitor and third variable capacitance, and the 6th capacitor and the third variable capacitance are simultaneously
Connection.
7. the flexible radio frequency receiving coil array as described in claim 1 to 6 any one, which is characterized in that the flexible face
Plate includes flexible circuit board and flexible mounting plate, and the copper circuit of the coil unit is printed upon on the flexible circuit board, described
Preamplifier installation plate is located on the flexible mounting plate.
8. flexible radio frequency receiving coil array as claimed in claim 7, which is characterized in that if being provided on the flexible panel
Dry through-hole, the through-hole are rectangle or circle.
9. flexible radio frequency receiving coil array as claimed in claim 7, which is characterized in that the flexible circuit board is by polyamides Asia
Amine film or polyester film are made, and the flexible mounting plate is made of polyethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810403253.1A CN109001656B (en) | 2018-04-28 | 2018-04-28 | A kind of flexible radio frequency receiving coil array |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810403253.1A CN109001656B (en) | 2018-04-28 | 2018-04-28 | A kind of flexible radio frequency receiving coil array |
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| Publication Number | Publication Date |
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| CN109001656A true CN109001656A (en) | 2018-12-14 |
| CN109001656B CN109001656B (en) | 2019-07-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810403253.1A Active CN109001656B (en) | 2018-04-28 | 2018-04-28 | A kind of flexible radio frequency receiving coil array |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111273206A (en) * | 2020-03-27 | 2020-06-12 | 苏州众志医疗科技有限公司 | Magnetic resonance radio frequency array coil and device and magnetic resonance imaging method |
| WO2022170741A1 (en) * | 2021-02-10 | 2022-08-18 | 清华大学 | Magnetic field enhancement component and magnetic field enhancement device |
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| US20120126814A1 (en) * | 2010-11-19 | 2012-05-24 | Hubertus Fischer | Pediatric coil assembly |
| CN102933141A (en) * | 2011-03-31 | 2013-02-13 | 东芝医疗系统株式会社 | Rf coil unit and mri apparatus |
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| US20120126814A1 (en) * | 2010-11-19 | 2012-05-24 | Hubertus Fischer | Pediatric coil assembly |
| CN102933141A (en) * | 2011-03-31 | 2013-02-13 | 东芝医疗系统株式会社 | Rf coil unit and mri apparatus |
| CN104471421A (en) * | 2012-06-28 | 2015-03-25 | 杜克大学 | Magnetic resonance imaging systems for integrated parallel reception, excitation and shimming and related methods and devices |
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| WO2022170741A1 (en) * | 2021-02-10 | 2022-08-18 | 清华大学 | Magnetic field enhancement component and magnetic field enhancement device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109001656B (en) | 2019-07-19 |
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