CN105527595B - Shoulder coil device for MRI system - Google Patents
Shoulder coil device for MRI system Download PDFInfo
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- CN105527595B CN105527595B CN201610023692.0A CN201610023692A CN105527595B CN 105527595 B CN105527595 B CN 105527595B CN 201610023692 A CN201610023692 A CN 201610023692A CN 105527595 B CN105527595 B CN 105527595B
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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
- G01R33/34046—Volume type coils, e.g. bird-cage coils; Quadrature bird-cage coils; Circularly polarised coils
- G01R33/34069—Saddle coils
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/055—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
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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
- G01R33/341—Constructional details, e.g. resonators, specially adapted to MR comprising surface coils
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Heart & Thoracic Surgery (AREA)
- Surgery (AREA)
- Engineering & Computer Science (AREA)
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- Medical Informatics (AREA)
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- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
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- Radiology & Medical Imaging (AREA)
- High Energy & Nuclear Physics (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
The present invention provides a kind of shoulder coil devices for MRI system, including inner casing and coiler part, the coiler part to be fixed on the inner casing；The inner casing includes the shoulder segments for covering on shoulders of human body and the arm segment for covering on human arm；The coiler part includes eight solenoid coils, respectively first coil, the second coil, tertiary coil, the 4th coil, the 5th coil, the 6th coil, the 7th coil and the 8th coil, wherein, the first coil, the second coil, tertiary coil, the 4th coil are separately positioned on the shoulder segments of the inner casing, signal for direction acquisition shoulders of human body from head to foot, 5th coil, the 6th coil, the 7th coil, the 8th coil are separately positioned on the arm segment of the inner casing, for acquiring the signal of shoulders of human body inwards from arm position.The beneficial effects of the invention are as follows:It is preferable with preferable uniformity and higher transfer efficiency, image quality.
Description
Technical field
The present invention relates to MRI systems（MRI）More particularly to a kind of shoulder for MRI system
Formula coil device.
Background technique
In modern medical service technology, MRI system is that one kind is widely used and the apparent common medical of effect
Equipment, also, the research and development in relation to MRI system are also in continuous carry out.In MRI system,
There is a coil device, by radio frequency（RF）Power amplifier driving, for being generated on a region as big as possible
The RF magnetic field of equally distributed some strength.
Because the performance of coil device influences very big, radio-frequency coil dress on the performance of MRI system
The quality for setting performance is particularly significant, and the quality of its performance essentially consists in two indices：
L, homogeneity range reaches the size in the region of RF magnetic field Even distribution entails, this region is the bigger the better；
2, the transmission power of radio frequency sending set is converted to the efficiency of RF magnetic field magnetic energy, due to radio frequency by transfer efficiency
Transmitter price is more expensive, and power it is bigger radio frequency sending set it is more expensive, if transfer efficiency with higher
Too powerful radio frequency sending set is not needed, cost can be reduced.
For coil device itself, the main factor for influencing its performance is the structure shape of coil device
Formula, the structure type generallyd use at present have：
L, saddle coil, general shape are similar to a saddle, therefore named saddle coil.Its advantage is that coil generates
Magnetic field homogeneity it is relatively good, transfer efficiency is also relatively high.But, saddle coil is extremely sensitive to radio frequency environment, and needs
Magnet is symmetrical, otherwise its uniformity and transfer efficiency all can variation sharply.It thus can only be by magnetic resonance imaging system
Be made into more closed cylindric perhaps similar shape and such shape to melancholia, claustrophobia or other one
The patient of similar conditions is unsuitable a bit, and serious psychological pressure can be generated to them.
2, the advantages of butterfly shaped coils, this coil is the structure that can be made split blade type, and the requirement to magnet shape
Also not high, but the uniformity of butterfly shaped coils is very bad, and efficiency is also relatively low.
3, solenoid coil, this coil is more suitable for steady magnetic field for the field system of vertical direction, but line solenoid
Circle is easy to be influenced by surrounding metal object, especially when metal object is close to solenoid coil, when exciting object to be seen
Efficiency is substantially reduced, and transfer efficiency is decreased obviously when detecting the magnetic resonance signal generated in object to be seen.
From above introduction it is recognised that the different discharging modes of radio-frequency coil coil and the shape of coil are to radio frequency line
The influence for enclosing performance is very big, how to discharge coil of different shapes in radio-frequency coil and often determines that the performance of radio-frequency coil is excellent
It is bad.
Summary of the invention
In order to solve the problems in the prior art, the present invention provides a kind of shoulder for MRI system to penetrate
Frequency coil device.
The present invention provides a kind of shoulder coil devices for MRI system, including inner casing and coil
Part, the coiler part are fixed on the inner casing；The inner casing includes covering on the shoulder segments of shoulders of human body and covering on people
The arm segment of body arm；The coiler part includes eight solenoid coils, respectively first coil, the second coil, third
Coil, the 4th coil, the 5th coil, the 6th coil, the 7th coil and the 8th coil, wherein the first coil, the second line
Circle, tertiary coil, the 4th coil are separately positioned on the shoulder segments of the inner casing, acquire human body shoulder for direction from head to foot
The signal in portion, the 5th coil, the 6th coil, the 7th coil, the 8th coil are separately positioned on the arm segment of the inner casing,
For acquiring the signal of shoulders of human body inwards from arm position.
As a further improvement of the present invention, the adjacent part overlapping of the first coil, the second coil, for eliminating
State the coupling between first coil, the second coil；The adjacent part overlapping of second coil, tertiary coil, for eliminating
State the coupling between the second coil, tertiary coil；The adjacent part overlapping of the tertiary coil, the 4th coil, for eliminating
State the coupling between tertiary coil, the 4th coil.
As a further improvement of the present invention, the adjacent part overlapping of the 5th coil, the 6th coil, for eliminating
State the coupling between the 5th coil, the 6th coil；The adjacent part overlapping of 6th coil, the 7th coil, for eliminating
State the coupling between the 6th coil, the 7th coil；The adjacent part overlapping of 7th coil, the 8th coil, for eliminating
State the coupling between the 7th coil, the 8th coil.
As a further improvement of the present invention, the first coil, the second coil, tertiary coil, the 4th coil mutually enclose
For sector, the 5th coil, the 6th coil, the 7th coil, the 8th coil are mutually enclosed as cylinder.
As a further improvement of the present invention, the 5th coil is equipped with portion with the first coil, the second coil respectively
Divide overlapping；6th coil is equipped with and partly overlaps with the first coil, the second coil, tertiary coil respectively；Described 7th
Coil is equipped with and partly overlaps with second coil, tertiary coil, the 4th coil respectively；8th coil is respectively with described
Three-winding, the 4th coil are equipped with and partly overlap.
As a further improvement of the present invention, the coiler part further includes electronic component, and the electronic component is serially connected in
The first coil, the second coil, tertiary coil, the 4th coil, the 5th coil, the 6th coil, the 7th coil, in the 8th coil
Any one.
As a further improvement of the present invention, the first coil, the second coil, tertiary coil, the 4th coil, the 5th line
Circle, the 6th coil, the 7th coil, the 8th coil are that copper strips is made.
As a further improvement of the present invention, the shoulder coil device further includes for covering the coiler part
Shell, the shell is fixedly connected with the inner casing, and the coiler part is arranged between the shell, inner casing.
The beneficial effects of the invention are as follows：Through the above scheme, the first coil of shoulder segments, the second coil, tertiary coil,
4th coil can completely covers entire shoulders of human body, provides preferable image quality；The 5th coil, the 6th line of arm segment
Circle, the 7th coil, the 8th coil, make the imaging region further expansion of coiler part, and final entire coiler part has preferable
Uniformity and higher transfer efficiency, image quality it is preferable.
Detailed description of the invention
Fig. 1 is a kind of front schematic view of the shoulder coil device for MRI system of the present invention.
Fig. 2 is a kind of side schematic view of the shoulder coil device for MRI system of the present invention.
Fig. 3 is a kind of schematic rear view of the shoulder coil device for MRI system of the present invention.
Fig. 4 is a kind of signal of the first coil of the shoulder coil device for MRI system of the present invention
Figure.
Fig. 5 is a kind of signal of second coil of the shoulder coil device for MRI system of the present invention
Figure.
Fig. 6 is a kind of signal of the tertiary coil of the shoulder coil device for MRI system of the present invention
Figure.
Fig. 7 is a kind of signal of 4th coil of the shoulder coil device for MRI system of the present invention
Figure.
Fig. 8 is a kind of signal of 5th coil of the shoulder coil device for MRI system of the present invention
Figure.
Fig. 9 is a kind of signal of 6th coil of the shoulder coil device for MRI system of the present invention
Figure.
Figure 10 is a kind of showing for 7th coil of the shoulder coil device for MRI system of the invention
It is intended to.
Figure 11 is a kind of showing for 8th coil of the shoulder coil device for MRI system of the invention
It is intended to.
Specific embodiment
The present invention is further described for explanation and specific embodiment with reference to the accompanying drawing.
Drawing reference numeral of the Fig. 1 into Figure 11 be：Inner casing 10；First coil 21；Second coil 22；Tertiary coil 23；4th
Coil 24；5th coil 25；6th coil, 26；7th coil 27；8th coil 28.
As shown in Figure 1 to 11, a kind of shoulder coil device for MRI system, including inner casing 10
And coiler part, the coiler part are fixed on the inner casing 10；The inner casing 10 includes the shoulder portion for covering on shoulders of human body
Divide and cover on the arm segment of human arm；The coiler part includes eight solenoid coils, respectively first coil 21, the
Two coil 22, tertiary coil 23, the 4th coil 24, the 5th coil 25, the 6th coil 26, the 7th coil 27 and the 8th coil 28,
Wherein, the first coil 21, the second coil 22, tertiary coil 23, the 4th coil 24 are separately positioned on the shoulder of the inner casing 10
Portion part forms one group of shoulder coil, the signal for direction acquisition shoulders of human body from head to foot；5th coil 25,
6th coil 26, the 7th coil 27, the 8th coil 28 are separately positioned on the arm segment of the inner casing 10, form one group of arm line
Circle, for acquiring the signal of shoulders of human body inwards from arm position；There is part weight between every two adjacent solenoid coil
It is folded.
As shown in Figure 1 to 11, the inner casing 10 is open by design, and the inner casing 10 is designed as the shape of shoulder, with
The scanned position of shoulders of human body matches（It is conformal）, shoulder segments correspond to the portion of people, and arm segment corresponds to human body
Arm position.
As shown in Figure 1 to 11, the adjacent part overlapping of the first coil 21, the second coil 22, forms saddle coil,
For eliminating the coupling between two coils；The adjacent part overlapping of second coil 22, tertiary coil 23, forms saddle type line
Circle, for eliminating the coupling between two coils；The adjacent part overlapping of the tertiary coil 23, the 4th coil 24, forms saddle
Shape coil, for eliminating the coupling between two coils；The effect of overlapping is removal mutual coupling（Total magnetic flux i.e. in overlapping region
It is zero）.
As shown in Figure 1 to 11, the adjacent part overlapping of the 5th coil 25, the 6th coil 26, forms saddle coil,
For eliminating the coupling between two coils；The adjacent part overlapping of 6th coil 26, the 7th coil 27, forms saddle type line
Circle, for eliminating the coupling between two coils；The adjacent part overlapping of 7th coil 27, the 8th coil 28, forms saddle
Shape coil, for eliminating the coupling between two coils；The effect of overlapping is removal mutual coupling（Total magnetic flux i.e. in overlapping region
It is zero）.
As shown in Figure 1 to 11, the first coil 21, the second coil 22, tertiary coil 23,24 phase of the 4th coil enclose
For sector, the first coil 21, the second coil 22, tertiary coil 23, the 4th coil 24 are fan-shaped uniformly around in inner casing
10 shoulder segments；5th coil 25, the 6th coil 26, the 7th coil 27,28 phase of the 8th coil enclose as cylinder, institute
State the 5th coil 25, the 6th coil 26, the 7th coil 27, the arm cylindrical uniformly around in inner casing 10 of the 8th coil 28
Part.
As shown in Figure 1 to 11, the 5th coil 25 is equipped with part with the first coil 21, the second coil 22 respectively
Overlapping；6th coil 26 is equipped with and partly overlaps with the first coil 21, the second coil 22, tertiary coil 23 respectively；Institute
The 7th coil 27 is stated to be equipped with and partly overlap with second coil 22, tertiary coil 23, the 4th coil 24 respectively；8th line
Circle 28 is equipped with and partly overlaps with the tertiary coil 23, the 4th coil 24 respectively, and the effect of overlapping is removal mutual coupling（That is overlay region
Total magnetic flux in domain is zero）.
As shown in Figure 1 to 11, the coiler part further includes electronic component, and the electronic component is serially connected in described first
Coil 21, the second coil 22, tertiary coil 23, the 4th coil 24, the 5th coil 25, the 6th coil 26, the 7th coil the 27, the 8th
Any one in coil 28, the electronic component can be preferably inductance, capacitor etc..
As shown in Figure 1 to 11, the first coil 21, the second coil 22, tertiary coil 23, the 4th coil the 24, the 5th
Coil 25, the 6th coil 26, the 7th coil 27, the 8th coil 28 are that copper strips is made.
As shown in Figure 1 to 11, the shoulder coil device further includes the shell for covering the coiler part,
The shell is fixedly connected with the inner casing 10, and the coiler part is arranged between the shell, inner casing 10.
As shown in Figure 1 to 11, in imaging process, by a kind of MRI system of being used for provided by the invention
Shoulder coil device covers on shoulders of human body as a secondary shoulder protector, imaging can be scanned to people's shoulder joint, coil is opened
The structure for putting formula is conducive to coil and puts position using patient, can obtain image identical with medicine solution plane position.
As shown in Figure 1 to 11, RF magnetic field excitation and receive all be to be completed by radio-frequency coil.For receiving line
Circle, it is vital for improving transfer efficiency.In general, lesser coil and higher turn can be obtained closer to imaging object
Change efficiency.In order to cover biggish imaging region, need using multiple coils around entire imaging object.Provided by the invention one
Kind above-mentioned requirements are met for the shoulder coil device of MRI system, the first coil 21 of shoulder segments,
Second coil 22, tertiary coil 23,24 can completely of the 4th coil cover entire shoulders of human body, provide preferable image quality；
The 5th coil 25, the 6th coil 26, the 7th coil 27, the 8th coil 28 of arm segment, make the imaging region of coiler part into
One step expands, and final entire coiler part has preferable uniformity and higher transfer efficiency, image quality preferable.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to of the invention
Protection scope.
Claims (5)
1. a kind of shoulder coil device for MRI system, it is characterised in that：Including inner casing and coil part
Point, the coiler part is fixed on the inner casing；The inner casing includes covering on the shoulder segments of shoulders of human body and covering on human body
The arm segment of arm；The coiler part includes eight solenoid coils, respectively first coil, the second coil, third line
Circle, the 4th coil, the 5th coil, the 6th coil, the 7th coil and the 8th coil, wherein the first coil, the second coil,
Tertiary coil, the 4th coil are separately positioned on the shoulder segments of the inner casing, acquire shoulders of human body for direction from head to foot
Signal, the 5th coil, the 6th coil, the 7th coil, the 8th coil be separately positioned on the arm segment of the inner casing, uses
In the signal for acquiring shoulders of human body inwards from arm position, the adjacent part overlapping of the first coil, the second coil, for disappearing
Except the coupling between the first coil, the second coil；The adjacent part overlapping of second coil, tertiary coil, for disappearing
Except the coupling between second coil, tertiary coil；The adjacent part overlapping of the tertiary coil, the 4th coil, for disappearing
Except the coupling between the tertiary coil, the 4th coil, the adjacent part overlapping of the 5th coil, the 6th coil, for disappearing
Except the coupling between the 5th coil, the 6th coil；The adjacent part overlapping of 6th coil, the 7th coil, for disappearing
Except the coupling between the 6th coil, the 7th coil；The adjacent part overlapping of 7th coil, the 8th coil, for disappearing
Except the coupling between the 7th coil, the 8th coil, the first coil, the second coil, tertiary coil, the 4th coil mutually enclose
It is combined into sector, the 5th coil, the 6th coil, the 7th coil, the 8th coil mutually enclose as cylinder.
2. the shoulder coil device according to claim 1 for MRI system, it is characterised in that：Institute
The 5th coil is stated to be equipped with and partly overlap with the first coil, the second coil respectively；6th coil is respectively with described first
Coil, the second coil, tertiary coil are equipped with and partly overlap；7th coil respectively with second coil, tertiary coil,
Four coils are equipped with and partly overlap；8th coil is equipped with and partly overlaps with the tertiary coil, the 4th coil respectively.
3. the shoulder coil device according to claim 1 for MRI system, it is characterised in that：Institute
Stating coiler part further includes electronic component, and the electronic component is serially connected in the first coil, the second coil, tertiary coil,
Four coils, the 5th coil, the 6th coil, the 7th coil, any one in the 8th coil.
4. the shoulder coil device according to claim 1 for MRI system, it is characterised in that：Institute
Stating first coil, the second coil, tertiary coil, the 4th coil, the 5th coil, the 6th coil, the 7th coil, the 8th coil is
Copper strips is made.
5. the shoulder coil device according to claim 1 for MRI system, it is characterised in that：Institute
Stating shoulder coil device further includes the shell for covering the coiler part, the shell and the fixed company of the inner casing
It connects, the coiler part is arranged between the shell, inner casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610023692.0A CN105527595B (en) | 2016-01-13 | 2016-01-13 | Shoulder coil device for MRI system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610023692.0A CN105527595B (en) | 2016-01-13 | 2016-01-13 | Shoulder coil device for MRI system |
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| Publication Number | Publication Date |
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| CN105527595A CN105527595A (en) | 2016-04-27 |
| CN105527595B true CN105527595B (en) | 2018-11-16 |
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| CN201610023692.0A Active CN105527595B (en) | 2016-01-13 | 2016-01-13 | Shoulder coil device for MRI system |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7545144B2 (en) * | 2007-11-14 | 2009-06-09 | Hitachi Medical Systems America, Inc. | Vertical field MRI shoulder coil |
| CN201398970Y (en) * | 2009-03-31 | 2010-02-10 | 西门子迈迪特(深圳)磁共振有限公司 | Shoulder coil |
| DE102011076824A1 (en) * | 2011-05-31 | 2012-12-06 | Siemens Aktiengesellschaft | Shoulder coil for MRI apparatus, has lower part and upper part elements that are arranged in movable manner relative to lower part, where each upper part element includes coil |
| DE102012203083A1 (en) * | 2012-02-29 | 2013-08-29 | Siemens Aktiengesellschaft | Shoulder local coil system for a magnetic resonance tomography system |
| CN203069771U (en) * | 2013-01-09 | 2013-07-17 | 上海联影医疗科技有限公司 | Shoulder coil |
| CN205301555U (en) * | 2016-01-13 | 2016-06-08 | 深圳市特深电气有限公司 | A shoulder formula RF coil device for magnetic resonance imaging system |
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- 2016-01-13 CN CN201610023692.0A patent/CN105527595B/en active Active
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Address after: 518107 area 301c, building 201, 301, 501, 5, building 4, Jihui mould Industrial Park, Tianliao Avenue, Tianliao community, Yutang street, Guangming District, Shenzhen City, Guangdong Province Patentee after: Shenzhen RF Tech Co., Ltd. Address before: 518132 Guangdong province Shenzhen Guangming New District Gongming street community Tianliao Juhui mould Industrial Park 4 2 floor Patentee before: Shenzhen RF Tech Co., Ltd. |