CN205787067U - A kind of open coil device for nuclear magnetic resonance - Google Patents
A kind of open coil device for nuclear magnetic resonance Download PDFInfo
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- CN205787067U CN205787067U CN201620389955.5U CN201620389955U CN205787067U CN 205787067 U CN205787067 U CN 205787067U CN 201620389955 U CN201620389955 U CN 201620389955U CN 205787067 U CN205787067 U CN 205787067U
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- midplane
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- magnetic resonance
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Abstract
This utility model relates to a kind of open coil device for nuclear magnetic resonance, especially with regard to a kind of magnetic resonance open coil device being used for multiple human bodies such as foot, leg and ancon carry out imaging, particularly relate to a kind of coil that can carry out nuclear magnetic resonance under the human body case of bendings such as lower limb.This utility model includes the receiving coil of three planes compositions being printed with winding wire and resonance matching circuit board and signal transmssion line.Described coil includes left plane, midplane and right plane；Left plane and midplane are mutually perpendicular to, and midplane and right plane are mutually perpendicular to, and left plane and right plane are parallel to each other；It is printed with winding wire in described three planes；The conductor structure of three planes is constituted by six parts, similar annulus symmetrical structure.This utility model employs open structure, may be used for the nuclear magnetic resonance in the bent state of the multiple position of human body；Specific arrangement of conductors can make this utility model have good uniformity of magnetic field and imaging signal to noise ratio.
Description
Technical field
This utility model relates to a kind of open coil, is used for many to foot, leg and ancon etc. especially with regard to one
Individual human body carries out the magnetic resonance open coil device of imaging, and particularly relating to one can be at human body case of bendings such as lower limbs
Under carry out the coil of nuclear magnetic resonance.
Background technology
The appearance of nuclear magnetic resonance, provides unprecedented new method to undoubtedly the diagnosis of human diseases.But it is traditional
For magnetic resonance signal receive commercial Radio Frequency (RF) coil be all enclosed construction, this most just to patient privileged sites (as
Elbow, foot, and because of special postures such as injured and inflexible knee joints) diagnosis bring difficulty.Meanwhile, some patient due to
The reason such as wound or poliomyelitis, leg can not stretch, it is impossible to lower limb is reached in tradition knee joint birdcage coil, so, exploitation
Open imaging coil is very important.Forefathers once attempt using U-shape structure design open coil (Orzada S, Bitz
AK,L C, et al.Medical physics, 2011,38 (3): 1162-1167.), but because coil distribution structure
Restriction, magnetic field homogeneity is poor, needs extra radio frequency shimming equipment.Also the mentality of designing of flexible coil is had tried to, but
Uniformity of magnetic field under differently curved angle needs to be improved further.
Utility model content
Commercial Radio Frequency (RF) coil being conventionally used to magnetic resonance signal reception is all enclosed construction, and this is the most just to patient's
The diagnosis of privileged sites (such as elbow, foot, and because of special postures such as injured and inflexible knee joints) brings difficulty.Meanwhile,
Some patient can not stretch due to the reason such as wound or poliomyelitis, leg, it is impossible to lower limb is reached tradition knee joint birdcage coil
In, so, developing and opening formula imaging coil is very important.Forefathers once attempt using U-shape structure design open coil, but
Because the restriction of coil distribution structure, magnetic field homogeneity is poor, it is impossible to meet clinical diagnosis demand.Also flexible coil is had tried to
Mentality of designing, but the uniformity of magnetic field under differently curved angle needs to be improved further.The purpose of this utility model is to carry
For a kind of the multiple positions of human body such as foot, elbow, knee joint can be carried out in the bent state imaging and magnetic field homogeneity is good opens
Put formula MRI coil device.In open three planes, specific coil distribution structure makes this utility model can be elbow, knee joint
Deng the bending offer sufficient space at position, and uniformity of magnetic field is good, thus realizes the multi-angle imaging of multiple location.
This utility model is realized by such technical scheme, and a kind of open coil for nuclear magnetic resonance fills
Put, the receiving coil formed including three planes being printed with winding wire and resonance matching circuit board and signal transmssion line.
Described coil includes left plane, midplane and right plane；Left plane and midplane are mutually perpendicular to, and midplane and right plane are mutual
Vertically, left plane and right plane are parallel to each other；It is printed with winding wire in described three planes；Described left plane institute printed-circuit cables bag
Include left plane the first conductor structure, left plane the second conductor structure, left plane privates structure, left plane privates knot
Six parts such as structure, left plane the 5th conductor structure, left plane the 6th conductor structure, left plane the first conductor structure includes three rings
Shape wire, constitutes class and " returns " font, and left plane the second conductor structure includes a toroidal conductor, left plane privates structure bag
Including two semi-circular wires, left plane the 4th to the 6th conductor structure divides to privates symmetrical configuration with left plane first respectively
Cloth；Described midplane institute printed-circuit cables includes midplane the first conductor structure, midplane the second conductor structure, midplane privates
Six parts such as structure, midplane privates structure, midplane the 5th conductor structure, midplane the 6th conductor structure, midplane
First conductor structure includes two semi-circular wires, constitutes complete annular structure with described left plane privates structure, in flat
Face the second conductor structure includes that a toroidal conductor, midplane privates structure include two semi-circular wires, midplane
Four to the 6th conductor structures are distributed with midplane first to privates symmetrical configuration respectively；The distribution of right planar conductor line and left plane
Identical.
Described three planes are three flat boards, and together, described resonance matching circuit board passes through wire to three gluing flats
Being connected with described coil, described signal transmssion line one end is connected with described resonance matching circuit board by joint, and described signal passes
The defeated line other end is connected with magnetic resonance imaging machine when scanning.
Preferably, described three flat boards are made up of bakelite plate or glass mat.
Preferably, described coil is made up of copper sheet.
Preferably, described coil is connected by coaxial transmission line and sub-miniature A connector with resonance matching circuit board.
Preferably, described signal transmssion line is coaxial transmission line, is connected with resonance matching circuit board by sub-miniature A connector.
Beneficial effect: from technique scheme it can be seen that this utility model employs open structure, may be used for
The nuclear magnetic resonance in the bent state of the multiple position of human body；Specific arrangement of conductors can make this utility model have good magnetic
Field uniformity and imaging signal to noise ratio, the target area uniformity is 3.89% ± 0.74%, and target area maximum signal to noise ratio is
270.35。
Accompanying drawing explanation
Fig. 1 general construction schematic diagram
The structural representation of Fig. 2 open coil main body
The conductor pattern of the left plane of Fig. 3 coil main body, left plane the first conductor structure 21, left plane the second conductor structure
22, left plane privates structure 23, left plane privates structure 24, left plane the 5th conductor structure 25, left plane the 6th
Conductor structure 26
The conductor pattern of Fig. 4 coil main body midplane, midplane the first conductor structure 31, midplane the second conductor structure
32, midplane privates structure 33, midplane privates structure 34, midplane the 5th conductor structure 35, midplane the 6th
Conductor structure 36
The conductor pattern of the right plane of Fig. 5 coil main body, right plane the first conductor structure 41, right plane the second conductor structure
42, right plane privates structure 43, right plane privates structure 44, right plane the 5th conductor structure 45, right plane the 6th
Conductor structure 46
The structural representation of Fig. 6 resonance matching circuit board
The structural representation of Fig. 7 magnetic resonance signal transmission line
Fig. 8 magnetic resonance water mould imaging experiment signal to noise ratio figure
Detailed description of the invention
As it is shown in figure 1, this utility model mainly includes receiving magnetic resonance signal open coil main body 1, resonance matching electricity
Road plate 2, signal transmssion line 3.
Open coil main body 1 of the present utility model includes three plane 11,12,13 compositions being printed with winding wire
Receiving coil.Winding wire is made up of copper sheet, is printed on three flat boards 11,12,13 by circuit board printing technology, puts down for three
Plate is bonded together by PUR or insulating tape and forms open loop construction, and flat board 11,12,13 can be by bakelite plate
Or the insulant such as glass mat are made.
Described coil includes left plane 11, midplane 12 and right plane 13；Described three plane sizes are identical, can be according to people
The size adjustment of body region, in the present embodiment, three plane sizes are 10cm × 10cm, and following size is all given by this size,
After plane sizes changes, below it is also sized to change accordingly.
As in figure 2 it is shown, left plane 11 and midplane 12 are mutually perpendicular to, midplane 12 and right plane 13 are mutually perpendicular to, Zuo Ping
Face 11 and right plane 13 are parallel to each other；It is printed with winding wire in described three planes.As it is shown on figure 3, described left plane is printed
Wire includes left plane the first conductor structure 21, left plane the second conductor structure 22, left plane privates structure 23, left plane
Privates structure 24, left plane the 5th conductor structure 25, left plane the 6th conductor structure 26 6 part, left plane the first wire
Structure 21 includes three irregular toroidal conductors, constitutes similar " returning " font structure, and ragged edge one ring size is 4cm × 3cm, in
Between a ring size be 3cm × 2cm, internal ring size is 2cm × 1.5cm, and the interval between three rings is as follows, plane as left in Fig. 3
On the upside of one conductor structure 21 and left side is spaced apart 1 2mm, downside and right side and is spaced apart 2 4mm；Left plane the second conductor structure
22 include an irregular toroidal conductor, and size is 2cm × 2cm；Left plane privates structure 23 includes that two semi-circulars are led
Line, outer shroud size is 2cm × 2cm, and internal ring size is 1cm × 1cm, is spaced apart 1 4mm；Left plane the 4th to the 6th wire is tied
Structure 24 26 is symmetrical to privates structure 21 23 with left plane first respectively, and the spacing of two row's conductor structures is
3cm—5cm.As shown in Figure 4, described midplane institute printed-circuit cables includes midplane the first conductor structure 31, midplane the second wire
Structure 32, midplane privates structure 33, midplane privates structure 34, midplane the 5th conductor structure 35, midplane
6th conductor structure 36 6 part, midplane the first conductor structure 31 includes that two semi-circular wires, size and interval are with described
Left plane privates structure 23 correspondent equal, constitutes complete annular structure with described left plane privates structure 23；In flat
Face the second conductor structure 32 includes a toroidal conductor, and size is 3cm × 2cm；Midplane privates structure 33 includes two
Semi-circular wire, size and interval and midplane the first conductor structure 31 correspondent equal；Midplane the 4th to the 6th conductor structure
34 36 is symmetrical with midplane first to privates structure 31 33 respectively；As it is shown in figure 5, right planar conductor line distribution with
Left plane is identical.The a width of 1mm of described wire.
It is signal transmssion line 15 and a detachable sub-miniature A connector 16 in one end of open coil main body 1, referring specifically to figure
2。
As shown in Figure 6, resonance matching circuit board 2 is connected with sub-miniature A connector 16 by sub-miniature A connector 56, and the other end is sub-miniature A connector
57, conveniently it is connected with transmission line 3.Resonance matching circuit board major function has been the resonance matching of coil main body 1, can be L
Type, T-shaped, π type or other tuning circuit structures, as long as the resonance matching of coil can be realized.Use T in the present embodiment
Type match circuit, including a fixed capacity 51, capacitance 30pF, variable capacitance 52, capacitance 0 20pF, variable capacitance 53,
Capacitance 0 20pF, variable capacitance 54, capacitance 0 20pF, prints copper cash 55.
Signal transmssion line 3 includes without magnetic SMA adaptor 61, without magnetic BNC adaptor 63, and signal transmssion line 62.SMA without magnetic
61 resonance matching circuit boards 2 of adaptor and magnetic resonance signal transmission line 3 link together, and make magnetic resonance signal transmit simultaneously
Line 3 can be connected and dismantle with resonance matching circuit board 2.The adaptor of BNC without magnetic 63 is for being connected with nuclear magnetic scanning instrument, open
The magnetic resonance signal that formula coil receives is passed to computer and is processed.Referring specifically to Fig. 7.
Fig. 8 is the noise that 16cm × 8.5cm × 7cm is filled the axle bitmap of the imaging experiment of the water mould of saline by this coil
Ratio (SNR) figure, imaging parameters is as follows, quick free echo (FSE) sequence, areas imaging (FOV): 24cm × 24cm, thickness=
6mm, echo time (TE)=120ms, repetition time (TR)=3000ms, matrix size=256 × 256, echo train length
(Echo train length)=16.The target area uniformity is 3.89% ± 0.74%, and target area maximum signal to noise ratio is
270.35.Target area is the circle of a diameter of 50mm of a height of 50mm centered by the cubical center that three planes surround
Post.
Claims (5)
1. for an open coil device for nuclear magnetic resonance, including coil, resonance matching circuit board and signal transmssion line,
It is characterized in that: described coil includes left plane, midplane and right plane；Left plane and midplane are mutually perpendicular to, midplane and
Right plane is mutually perpendicular to, and left plane and right plane are parallel to each other；It is printed with winding wire in described three planes；Described left plane
Institute's printed-circuit cables includes left plane the first conductor structure (21), left plane the second conductor structure (22), left plane privates structure
(23), left plane privates structure (24), left plane the 5th conductor structure (25), left plane the 6th conductor structure (26) six
Point, left plane the first conductor structure (21) includes three toroidal conductors, constitutes class and " returns " font, left plane the second conductor structure
(22) include that a toroidal conductor, left plane privates structure (23) include two semi-circular wires, left plane the 4th to
Six conductor structures (24 26) are symmetrical to privates structure (21 23) with left plane first respectively；Described midplane institute
Printed-circuit cables includes midplane the first conductor structure (31), midplane the second conductor structure (32), midplane privates structure
(33), midplane privates structure (34), midplane the 5th conductor structure (35), midplane the 6th conductor structure (36) six
Point, midplane the first conductor structure (31) includes two semi-circular wires, constitutes complete with described left plane privates structure
Loop configuration, midplane the second conductor structure (32) includes that a toroidal conductor, midplane privates structure (33) include two
Individual semi-circular wire, midplane the 4th to the 6th conductor structure (34 36) arrives privates structure with midplane first respectively
(31 33) are symmetrical；The distribution of right planar conductor line is identical with left plane.
A kind of open coil device for nuclear magnetic resonance, it is characterised in that: described tuning
Match circuit plate two ends are with sub-miniature A connector.
A kind of open coil device for nuclear magnetic resonance, it is characterised in that: described tuning
Match circuit plate is made up of variable capacitance, fixed capacity and printing copper cash.
A kind of open coil device for nuclear magnetic resonance, it is characterised in that: described signal
Transmission line one end has sub-miniature A connector, the other end to have BNC connector.
A kind of open coil device for nuclear magnetic resonance, it is characterised in that: described tuning
Coil impedance is matched 50 ohm or 75 ohm by match circuit plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620389955.5U CN205787067U (en) | 2016-05-03 | 2016-05-03 | A kind of open coil device for nuclear magnetic resonance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620389955.5U CN205787067U (en) | 2016-05-03 | 2016-05-03 | A kind of open coil device for nuclear magnetic resonance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205787067U true CN205787067U (en) | 2016-12-07 |
Family
ID=57411191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620389955.5U Withdrawn - After Issue CN205787067U (en) | 2016-05-03 | 2016-05-03 | A kind of open coil device for nuclear magnetic resonance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205787067U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105807242A (en) * | 2016-05-03 | 2016-07-27 | 北京大学 | Open-type coil device for magnetic resonance imaging |
| CN110531289A (en) * | 2019-05-29 | 2019-12-03 | 庞厚芬 | A kind of extension type magnetic resonance coil and MR imaging apparatus |
-
2016
- 2016-05-03 CN CN201620389955.5U patent/CN205787067U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105807242A (en) * | 2016-05-03 | 2016-07-27 | 北京大学 | Open-type coil device for magnetic resonance imaging |
| CN105807242B (en) * | 2016-05-03 | 2018-08-10 | 北京大学 | A kind of open coil device for magnetic resonance imaging |
| CN110531289A (en) * | 2019-05-29 | 2019-12-03 | 庞厚芬 | A kind of extension type magnetic resonance coil and MR imaging apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161207 Effective date of abandoning: 20180810 |
|
| AV01 | Patent right actively abandoned |