CN106291420A - Wrist coil for magnetic resonance imaging system - Google Patents
Wrist coil for magnetic resonance imaging system Download PDFInfo
- Publication number
- CN106291420A CN106291420A CN201610847404.3A CN201610847404A CN106291420A CN 106291420 A CN106291420 A CN 106291420A CN 201610847404 A CN201610847404 A CN 201610847404A CN 106291420 A CN106291420 A CN 106291420A
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- China
- Prior art keywords
- coil
- wrist
- magnetic resonance
- upper cover
- imaging system
- 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.)
- Pending
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- 210000000707 wrist Anatomy 0.000 title claims abstract description 80
- 238000002595 magnetic resonance imaging Methods 0.000 title claims abstract description 18
- 210000004247 hand Anatomy 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 abstract description 2
- 238000005481 NMR spectroscopy Methods 0.000 description 10
- 238000003384 imaging method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011017 operating method Methods 0.000 description 2
- 210000001519 tissue Anatomy 0.000 description 2
- 230000003187 abdominal effect Effects 0.000 description 1
- 210000003797 carpal joint Anatomy 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 210000000629 knee joint Anatomy 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 210000001037 metacarpus Anatomy 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 210000003857 wrist joint Anatomy 0.000 description 1
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
- G01R33/34007—Manufacture of RF coils, e.g. using printed circuit board technology; additional hardware for providing mechanical support to the RF coil assembly or to part thereof, e.g. a support for moving the coil assembly relative to the remainder of the MR system
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
The invention provides a kind of wrist coil for magnetic resonance imaging system, including coil base and the coil upper cover pivotally connected with described coil base, described coil base is pivotally connected with one end of described coil upper cover, the other end carries out locking by button latch and connects, and is formed with a hollow cavity between described coil base and described coil upper cover.Beneficial effects of the present invention is embodied in: uses the exercisable pressing of upper and lower one hand to uncap form, has better met the demand of operator.Simultaneously so that palm wrist easily can be placed in coil suitably position by patient, without worrying too small openings or the injured situation causing hands normally to place of hand.Manual lock at wrist can fix the position of wrist, the antenna element of coil inside can be made again to be close to the wrist of patient, it is ensured that also ensure that the uniformity of scanogram, stability while patient safety is comfortable.
Description
Technical field
The invention belongs to technical field of medical instruments, be specifically related to a kind of wrist coil for magnetic resonance imaging system.
Background technology
Nuclear magnetic resonance (Magnetic resonance imaging, MRI) is to exist according to organism magnetic core (proton)
The new and high technology of the performance characteristic imaging in magnetic field, its physical basis is nuclear magnetic resonance, NMR (Nuclear magnetic
Resonance, NMR) theoretical.So-called nuclear magnetic resonance, NMR refers to the covibration that changing of magnetism is relevant with magnetic field, the work of outside magnetic field
Under with, some around the proton (including the Hydrogen Proton in human body) of the spin of main field precession under of short duration rf wave effect,
Angle of precession increases, and after rf wave stops, those protons can be gradually restored to again original state, and discharge and excitation simultaneously
The radiofrequency signal that wave frequency is identical, this physical phenomenon is referred to as nuclear magnetic resonance, NMR.After this RF signal collection, encoded,
The image of scanned tissue is can be obtained by after conversion, data reconstruction.RF receiving coil is described for magnetic resonance
Gathering the device of described signal in system, coil, according to the relation with human body, can be divided into head coil, abdominal part coil, knee joint
Coil etc..Wherein wrist coil is for being scanned hand and the wrist of human body.
In current clinical practice, wrist coil one has two kinds, as it is shown in figure 1, the coil being integrated；Should
Coil antenna unit can be evenly distributed in coil surrounding, wraps the wrist tissue of people well, and therefore it has image
The feature that the uniformity is high；The structure of integration makes coil unit installation and debugging simple, can also while reducing difficulty of processing
Reduce the operating procedure of Clinical practice.But owing to patient's hand-type size is had nothing in common with each other, this is accomplished by the wrist opening of coil to do
Must bigger can use to most people.Excessive opening makes the antenna element of coil wrist paste with human body wrist
Close defective tightness, also cannot fix the position of wrist well, affect the imaging effect of wrist.
Along with development, occur in that a kind of upper and lower part can be kept completely separate the coil of structure.This structure is by around coil
Snap close carries out folding, and so when Clinical practice, the wrist of patient can easily be placed in coil, improves relaxing of patient
Appropriateness, but doctor is when unlatching or closing coil, needs both hands to complete operation, adds operating procedure.Meanwhile, above,
The antenna element of lower folding design wrist in wrist the most above and below, cannot wrap wrist well
Side, the uniformity of image is the best.Additionally, the top half of this structure always has at least two (at least one palm coil list
Unit, a wrist coil unit) the signal demand radio-frequency (RF) coaxial joint of passage is connected to the latter half, in magnetic resonance system
The joint price of radio-frequency (RF) coaxial without magnetic used is relatively costly, and the junction, top and the bottom being used in frequent folding is also easier to damage
Bad, shorten the service life of coil, add use cost and the maintenance cost of coil.The antenna element distribution of wrist coil
Generally use loop coil, couple relatively big between the loop coil faced up and down, reduce the signal to noise ratio of imaging.
Summary of the invention
The invention provides a kind of wrist coil for magnetic resonance imaging system.
The purpose of the present invention is achieved through the following technical solutions:
For the wrist coil of magnetic resonance imaging system, including in coil base and the coil pivotally connected with described coil base
Lid, described coil base is pivotally connected with one end of described coil upper cover, and the other end carries out locking by button latch and connects,
It is formed with a hollow cavity between described coil base and described coil upper cover.
Preferably, described coil base is distributed lower wrist portion and is arranged at the lower palmar hand of lower wrist portion front end, described
Coil upper cover is distributed wrist portion and is arranged at the upper palmar hand of wrist portion front end, described upper and lower wrist portion with described upper,
Rounding off between lower palmar hand.
Preferably, described coil base and coil upper cover side are provided with connecting plate, and the bottom of described connecting plate is with described
Coil base is fixing to be connected, and the top of described connecting plate offers draw-in groove；
Described button latch includes protruding the connecting rod being arranged at the button covered on coil and being changed by button driving, described connecting rod
The domed lower section being placed in button, the both sides of described upper cover are inwardly provided with buckling groove, when described coil upper cover and described coil
When base is closed, described draw-in groove is coaxial with described buckling groove, and the two ends of described connecting rod are arranged in described buckling groove and described draw-in groove
In, fixing described coil upper cover and described coil base.
Preferably, described upper and lower wrist portion is provided with loop coil unit, the ring of described upper and lower wrist portion junction
Shape coil unit connects by connecting pin, and described upper and lower palmar hand is made up of saddle-type coil unit and loop coil unit, and
Partially overlap between the coil unit of described upper and lower palmar hand.
Preferably, described upper palmar hand is provided with saddle-type coil unit, and described lower palmar hand is provided with loop coil list
Unit.
Preferably, described upper palmar hand is provided with loop coil unit, and described lower palmar hand is provided with saddle-type coil list
Unit.
Preferably, it is connected by hinge pivot between described coil base with described coil upper cover.
Preferably, single is used to connect between described connection pin.
Preferably, described upper and lower wrist portion is provided with two partly overlapping loop coil unit.
Preferably, described saddle-type coil unit and described loop coil unit are provided with two.
Beneficial effects of the present invention is embodied in: uses the exercisable pressing of upper and lower one hand to uncap form, better meets
The demand of operator.Simultaneously so that palm wrist easily can be placed in coil suitably position by patient, without worry
Too small openings or the injured situation causing hands normally to place of hand.Manual lock at wrist can fix the position of wrist,
The antenna element of coil inside can be made again to be close to the wrist of patient, it is ensured that also ensure that while patient safety is comfortable and sweep
The tracing uniformity of picture, stability.
Accompanying drawing explanation
Fig. 1: this wrist coil structural representation of the prior art.
The wrist coil perspective view of Fig. 2: the present invention.
Fig. 3: the structural representation that in the present invention, Fig. 2 opens.
Fig. 4: the structural representation of lid-opening button in the present invention, now conceals upper cover.
Fig. 5: the antenna element arrangement connecting structure schematic diagram in wrist coil of the present invention.
Fig. 6: wrist coil of the present invention and signal to noise ratio comparison diagram in wrist coil implementation process in prior art.
Detailed description of the invention
It is specifically described technical scheme below in conjunction with embodiment, present invention is disclosed a kind of for nuclear magnetic resonance
The wrist coil of system, as Figure 2-Figure 5, including coil base 2 and is connected by hinge pivot with described coil base 2
Coil upper cover 1.Described coil base 2 is pivotally connected with one end of described coil upper cover 1, and the other end is carried out by button latch
Locking connects, and is formed with a hollow cavity 3 between described coil base and described coil upper cover.In use, button latch is passed through
Opening coil upper cover 1, hands is placed in inner chamber 3 by patient, closes coil upper cover 1, carries out the detection of magnetic resonance.
Concrete, described coil base 2 is distributed lower wrist portion and is arranged at the lower palmar hand of lower wrist portion front end, with line
Circle base 2 is corresponding, and described coil upper cover 1 is distributed wrist portion and is arranged at the upper palmar hand of wrist portion front end, in order to
There is more preferable covering property, rounding off between described upper and lower wrist portion and described upper and lower palmar hand when magnetic resonance.
Described coil base 2 is provided with connecting plate (not illustrating in figure), the bottom of described connecting plate with coil upper cover 1 side
Fixing with described coil base 2 and be connected, the top of described connecting plate offers draw-in groove 43；The both sides of described coil upper cover 1 are inside
It is provided with buckling groove 42.
Described button latch includes protruding the connecting rod being arranged at the button 4 covered on coil and being changed by button driving, institute
State the domed lower section being placed in button 4 of connecting rod, concrete, described coil upper cover 1 is provided with a support, described connecting rod rest is located at
On described support, described button 4 is placed in connecting rod top, and described connecting rod is divided into two ends.When described coil upper cover 1 and described line
Circle base 2 is when closing, and described draw-in groove 43 is coaxial with described buckling groove 42, the two ends of described connecting rod be arranged in described buckling groove 42 and
In described draw-in groove 43, fixing described coil upper cover 1 and described coil base 2.The distalmost end of described connecting rod is provided by round and smooth
Little projection stretches into described draw-in groove 43.
When described button is pressed for 4 times, with described connecting rod central contact bottom button, touch connecting rod section 41 and be lifted up, shape
Become the principle of fulcrum and lever.Connecting rod two ends are ejected in draw-in groove 43, release the connection of coil upper cover 1 and coil base 2.
Different and the existing structure divided by upper coil shell body, its built-in coil is also significantly improved.Concrete, institute
Stating upper and lower wrist portion and be provided with loop coil unit, the loop coil unit of described upper and lower wrist portion junction is by connecting
Pin connects.Single is used to connect between described connection pin.Typically, described upper and lower wrist portion be provided with two partly overlapping
Loop coil unit.
Single core connector cost is relatively low, can reduce and the coupling influence of relative loop coil unit meanwhile, moreover it is possible to preferably
Wrap wrist, improve signal to noise ratio and the uniformity of imaging.The distance of described connection pin and wrist coil pivot is relatively
Far, when wrist coil opens maximum angle or Guan Bi, the angle change connecting pin is little, reduces and in use connects
Connect the pin stress in all directions, extend the service life of wrist coil.
Described upper and lower palmar hand is made up of saddle-type coil unit and loop coil unit, and described upper and lower palmar hand
Partially overlap between coil unit.Shown in Fig. 5, described upper palmar hand is provided with saddle-type coil unit, the described shape of a saddle
Coil unit is provided with two, the respectively first saddle-type coil unit Ch6, the second saddle-type coil unit Ch8.Described assistant
Metacarpus is provided with two loop coil unit, the most first annular coil unit Ch5, the second loop coil unit Ch7.
Certainly, described upper palmar hand can also use and be set to loop coil unit, and described lower palmar hand is set to saddle
Shape coil unit.Owing to saddle-type coil unit has an easily decoupling, so also can without increasing extra decoupling circuit
Have and preferably decouple effect, improve the signal to noise ratio of coil.Human body palm part ratio is relatively thin, and presses close to saddle-type coil unit,
Image also has preferable definition and resolution.
4 coil units of wrist coil lower part, all have employed Overlap(and partially overlap between adjacent coil unit)
Method uncoupling, wherein, the wrist lower part coil unit Ch1 adjacent with upper part and tertiary coil unit Ch3, the
Four coil unit Ch2 and the 5th coil unit Ch4 also use the decoupling of Overlap method, the most non-conterminous but relative coil
Unit, as coil unit Ch1 and the 5th coil unit Ch4, the 4th coil unit Ch2 have employed electricity with tertiary coil unit Ch3
Sense decoupling.
4 unit of wrist coil upper part, have employed the decoupling of Overlap method equally between adjacent unit.Pass through
Experiment also demonstrates, the antenna cell design distribution of this coil, in the case of not using more decoupling circuit, has good
Uncoupling effect, improve the signal to noise ratio of whole coil.
Wrist coil in the present invention is little compared to conventional coil areas imaging, can only sweep carpal joint and palm
Retouch, it is impossible to see finger part, areas imaging can be reached bigger, broad view, it is possible to simultaneously to wrist joint, palm, hands
Finger is scanned.
As shown in Figure 6, transverse axis is the position processed in wrist on axis, same position, and the longitudinal axis is the value of signal to noise ratio,
In figure, dotted portion is the wrist coil of the present invention, and bold portion is the most traditional wrist coil.It can be seen that
Our coil has higher signal to noise ratio in bigger scope, and conventional coil is only higher in centre position signal to noise ratio,
This illustrates that our coil can scan bigger scope.
The present invention still has multiple specific embodiment.All employing equivalents or equivalent transformation and all skills of being formed
Art scheme, within all falling within the scope of protection of present invention.
Claims (10)
1. for the wrist coil of magnetic resonance imaging system, it is characterised in that: include coil base and with described coil base pivot
The coil upper cover that axle connects, described coil base is pivotally connected with one end of described coil upper cover, and the other end passes through button
Lock carries out locking and connects, and is formed with a hollow cavity between described coil base and described coil upper cover.
2. the wrist coil for magnetic resonance imaging system as claimed in claim 1, it is characterised in that: described coil base is divided
Being furnished with lower wrist portion and be arranged at the lower palmar hand of lower wrist portion front end, described coil upper cover is distributed wrist portion and is arranged at
The upper palmar hand of upper wrist portion front end, between described upper and lower wrist portion and described upper and lower palmar hand, rounding off forms hollow
Chamber.
3. the wrist coil for magnetic resonance imaging system as claimed in claim 1, it is characterised in that: described coil base with
Coil upper cover side is provided with connecting plate, and the bottom of described connecting plate is fixing with described coil base to be connected, described connecting plate
Top offers draw-in groove；
Described button latch includes protruding the connecting rod being arranged at the button covered on coil and being changed by button driving, described connecting rod
The domed lower section being placed in button, the both sides of described upper cover are inwardly provided with buckling groove, when described coil upper cover and described coil
When base is closed, described draw-in groove is coaxial with described buckling groove, and the two ends of described connecting rod are arranged in described buckling groove and described draw-in groove
In, fixing described coil upper cover and described coil base.
4. the wrist coil for magnetic resonance imaging system as claimed in claim 1, it is characterised in that: described upper and lower wrist
Portion is provided with loop coil unit, and the loop coil unit of described upper and lower wrist portion junction connects by connecting pin, described
Upper and lower palmar hand is made up of saddle-type coil unit and loop coil unit, and between the coil unit of described upper and lower palmar hand
Partially overlap.
5. the wrist coil for magnetic resonance imaging system as claimed in claim 4, it is characterised in that: described upper palmar hand sets
Being equipped with saddle-type coil unit, described lower palmar hand is provided with loop coil unit.
6. the wrist coil for magnetic resonance imaging system as claimed in claim 4, it is characterised in that: described upper palmar hand sets
Being equipped with loop coil unit, described lower palmar hand is provided with saddle-type coil unit.
7. the wrist coil for magnetic resonance imaging system as claimed in claim 1, it is characterised in that: described coil base with
Connected by hinge pivot between described coil upper cover.
8. the wrist coil for magnetic resonance imaging system as claimed in claim 4, it is characterised in that: between described connection pin
Employing single connects.
9. the wrist coil for magnetic resonance imaging system as claimed in claim 4, it is characterised in that: described upper and lower wrist
Portion is provided with two partly overlapping loop coil unit.
10. the wrist coil for magnetic resonance imaging system as described in claim 5 or 6, it is characterised in that: the described shape of a saddle
Coil unit and described loop coil unit are provided with two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610847404.3A CN106291420A (en) | 2016-09-26 | 2016-09-26 | Wrist coil for magnetic resonance imaging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610847404.3A CN106291420A (en) | 2016-09-26 | 2016-09-26 | Wrist coil for magnetic resonance imaging system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106291420A true CN106291420A (en) | 2017-01-04 |
Family
ID=57714825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610847404.3A Pending CN106291420A (en) | 2016-09-26 | 2016-09-26 | Wrist coil for magnetic resonance imaging system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106291420A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114325521A (en) * | 2020-10-09 | 2022-04-12 | 上海联影医疗科技股份有限公司 | Coil structure and method for controlling coil structure |
| US11686794B2 (en) | 2020-10-09 | 2023-06-27 | Shanghai United Imaging Healthcare Co., Ltd. | Coil assembly and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2907543Y (en) * | 2005-08-29 | 2007-06-06 | 上海复旦辰光科技有限公司 | Wrist radio frequency circuit used for magnetic resonance imaging |
| US20070152667A1 (en) * | 2005-11-23 | 2007-07-05 | Schubert Thomas E | Wrist coil for magnetic resonance imaging |
| CN202128463U (en) * | 2011-06-15 | 2012-02-01 | 上海辰光医疗科技股份有限公司 | Head radio frequency coil device for magnetic resonance imaging in vertical field |
| CN102749597A (en) * | 2012-07-04 | 2012-10-24 | 苏州众志医疗科技有限公司 | Knee joint radio-frequency (RF) coil in horizontal-field magnetic resonance system |
| CN202886578U (en) * | 2012-09-28 | 2013-04-17 | 上海联影医疗科技有限公司 | Wrist coil apparatus used for magnetic resonance imaging device |
| CN202929188U (en) * | 2012-10-12 | 2013-05-08 | 上海联影医疗科技有限公司 | Multichannel wrist coil |
| CN206147082U (en) * | 2016-09-26 | 2017-05-03 | 苏州众志医疗科技有限公司 | A wrist coil for magnetic resonance imaging system |
-
2016
- 2016-09-26 CN CN201610847404.3A patent/CN106291420A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2907543Y (en) * | 2005-08-29 | 2007-06-06 | 上海复旦辰光科技有限公司 | Wrist radio frequency circuit used for magnetic resonance imaging |
| US20070152667A1 (en) * | 2005-11-23 | 2007-07-05 | Schubert Thomas E | Wrist coil for magnetic resonance imaging |
| CN202128463U (en) * | 2011-06-15 | 2012-02-01 | 上海辰光医疗科技股份有限公司 | Head radio frequency coil device for magnetic resonance imaging in vertical field |
| CN102749597A (en) * | 2012-07-04 | 2012-10-24 | 苏州众志医疗科技有限公司 | Knee joint radio-frequency (RF) coil in horizontal-field magnetic resonance system |
| CN202886578U (en) * | 2012-09-28 | 2013-04-17 | 上海联影医疗科技有限公司 | Wrist coil apparatus used for magnetic resonance imaging device |
| CN202929188U (en) * | 2012-10-12 | 2013-05-08 | 上海联影医疗科技有限公司 | Multichannel wrist coil |
| CN206147082U (en) * | 2016-09-26 | 2017-05-03 | 苏州众志医疗科技有限公司 | A wrist coil for magnetic resonance imaging system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114325521A (en) * | 2020-10-09 | 2022-04-12 | 上海联影医疗科技股份有限公司 | Coil structure and method for controlling coil structure |
| US11686794B2 (en) | 2020-10-09 | 2023-06-27 | Shanghai United Imaging Healthcare Co., Ltd. | Coil assembly and control method thereof |
| CN114325521B (en) * | 2020-10-09 | 2023-07-25 | 上海联影医疗科技股份有限公司 | Coil structure and method for controlling the same |
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