CN104473644B - A kind of coil control system and neck for magnetic resonance imaging combines coil - Google Patents
A kind of coil control system and neck for magnetic resonance imaging combines coil Download PDFInfo
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- CN104473644B CN104473644B CN201410854627.3A CN201410854627A CN104473644B CN 104473644 B CN104473644 B CN 104473644B CN 201410854627 A CN201410854627 A CN 201410854627A CN 104473644 B CN104473644 B CN 104473644B
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- 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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Abstract
A kind of coil control system and neck for magnetic resonance imaging combines coil, including several communication links, communication link described in each includes coil, control circuit and common mode chokes ring, the coil connects the control circuit, and the control circuit connects the common mode chokes ring, wherein, the control circuit includes match circuit, phase-shift circuit and amplifier, the phase-shift circuit connects the match circuit and amplifier, match circuit are connected with coil, and amplifier is connected with common mode chokes ring.A kind of coil control system and neck for magnetic resonance imaging provided by the invention combines coil, can cover head and neck simultaneously, obtains high s/n ratio and higher image in different resolution, realizes and head and neck are carried out while be imaged；In addition, neck unit is designed using flexible structure, for different patients, the coil unit of neck can carry out adaptive curved, ensure that coil can fit closely patient's neck, improve image quality.
Description
Technical field
The present invention relates to magnetic resonance imagings, more particularly, to the coil control system of magnetic resonance imaging and neck joint line
Circle.
Background technology
Magnetic resonance imaging (Magnetic Resonance Imaging, MRI) is nuclear magnetic resonance (Nuclear Magnetic
Resonance, NMR) important application medically.The main magnetic system of magnetic resonance imaging can generate homogeneous main magnetic field, make one
Hydrogen nuclei in body issues raw spin polarization in main field, and the hydrogen nuclei of magnetic polarization spins in human body generates magnetic moment.
In the case of not having external magnetic field excitation, which is in stable state, and the direction of magnetic moment and the direction of main field are coaxial, it is impossible to be had
Effect imaging.When additional uniform radio frequency (Radio Frequency, RF) magnetic field, magnetic moment is activated to generate nuclear-magnetism in human body
Resonance signal gathers NMR signal by coil, final to obtain measurand lesion after being converted using electric-control system
The medical data and image of position.
In order to improve the visual field of magnetic resonance imaging and signal-to-noise ratio, accelerate image taking speed.Magnetic resonance radio frequency module is usual
Using multi-channel radio frequency receiving coil, the magnetic resonance that each radio-frequency coil unit is received by electromagnetic induction in imaging space is believed
Number, the magnetic resonance signal that each radio-frequency coil unit receives corresponds to a receiving channel.In the ideal case, each radio-frequency coil
Alternating magnetic field caused by unit is independent, alternation magnetic caused by any two radio-frequency coil unit in radio-frequency coil unit
It is not influenced between.However, in practical applications, coupling phenomenon may occur between two radio-frequency coil units,
Particularly with adjacent radio-frequency coil unit, coupling phenomenon is especially prominent, and this reduces the signal-to-noise ratio of Multi-channel radio-frequency coil.
At present, the port number that radio-frequency coil reception is can be used in clinical practice, in MRI system is generally less than equal to 32
Passage, and in the detection of some clinical magnetic resonances, such as vascular wall imaging outside encephalic, it is necessary to be detected simultaneously to head and neck, visit
Survey scope is larger, so that needing the image obtained that should have higher resolution ratio could be as the foundation of clinical diagnosis.Specifically
Ground, traditional radio-frequency coil include 32 passage head coils, 16 passage necks joint coil and 36 passage head-neck-chest coils.Wherein,
The shell of 32 passage head coils is designed using helmet-type so that the coil of each unit is close to head, obtains high s/n ratio and resolution
The image of rate, still, there are blind spots for the search coverage of radio-frequency coil, it is impossible to effectively detected, can not to head and neck into
Row is imaged simultaneously, causes that accurate diagnostic image cannot be obtained；16 passage necks are combined coil and are carried out on head using 12 passages
Acquisition, is acquired using 4 passages in neck, can obtain the image of head and neck simultaneously, still, the signal-to-noise ratio of acquisition is past
Past relatively low, head image resolution ratio is relatively low, it is impossible to provide clearly medical image for clinical diagnosis；36 passage head-neck-chest coils are visited
It is larger to survey scope, while obtains the image of head, neck and chest, still, the signal-to-noise ratio of acquisition is often relatively low, head image point
Resolution is relatively low, it is impossible to provide clearly medical image for clinical diagnosis.
The content of the invention
The present invention provides a kind of coil for magnetic resonance imaging and controls to solve technical problem in the prior art
System and neck joint coil, improve the signal-to-noise ratio obtained during scanning and image resolution ratio, realize the head to patient and neck
Progress detects simultaneously, improves image quality.
A kind of coil control system for magnetic resonance imaging, including several communication links, communication chain described in each
Road includes coil, control circuit and common mode chokes ring, and the coil connects the control circuit, and the control circuit connects institute
Common mode chokes ring is stated, wherein, the control circuit includes match circuit, phase-shift circuit and amplifier, the phase-shift circuit series connection
The match circuit and amplifier, match circuit are connected with coil, and amplifier is connected with common mode chokes ring.
Further, tuning capacitance and diode are provided in the coil.
Further, the frequency of the tuning capacitance is 123.2MHz, and the diode is PIN type diode.
Further, inductance and capacitance are included at least inside the match circuit, for generating 50 ohm of noise resistance.
Further, inductance and capacitance are included at least inside the phase-shift circuit, for generating 50 ohm of noise resistance.
Further, the quantity of the communication link is 32.
Neck combines coil, and including pedestal and joint coil, the pedestal includes inner cavity, and the joint coil includes several
A head unit and several neck units, the quantity of the head unit is 24, each described head unit is close to
In on the inner cavity of the pedestal, the quantity of the neck unit 8, each described neck unit is close to the pedestal
On inner cavity.
Further, the inner cavity includes head chamber and neck chamber, and the head unit is arranged at the head chamber, described
Neck unit is arranged at the neck chamber.
Further, the head unit is connected with the neck unit by the way of overlapping.
Further, the head unit is fixed shape and structure, and the neck unit is flexible structure.
Beneficial effects of the present invention：
In conclusion a kind of coil control system and neck for magnetic resonance imaging provided by the invention combines coil,
By reasonable distribution head and the coil unit quantity of neck, the reasonable coil position that head and neck are set so that coil energy
It is enough to cover head and neck simultaneously, high s/n ratio and higher image in different resolution are obtained, realizes and head and neck is carried out simultaneously
Imaging；In addition, in order to ensure that neck unit can be close to be imaged position, neck unit is designed using flexible structure, for difference
Patient, the coil unit of neck can carry out adaptive curved, ensure that coil can fit closely patient's neck, improve into image quality
Amount.
Description of the drawings
Fig. 1 is schematic diagram of the embodiment of the present invention for the coil control system of magnetic resonance imaging.
Fig. 2 is the structure diagram of neck of embodiment of the present invention joint coil.
Specific embodiment
In order to preferably illustrate the technical characterstic of the present invention and structure, below in conjunction with the preferred embodiment of the present invention and its attached
Figure is described in detail.
Refering to Fig. 1, a kind of coil control system for magnetic resonance imaging, including several communication links, each is led to
Believe that link includes coil 11, control circuit 10 and common mode chokes ring 19, coil 11 connects control circuit 10, and control circuit 10 connects
Common mode chokes ring 19 is connect, wherein, control circuit 10 includes match circuit 13, phase-shift circuit 15 and amplifier 17, phase-shift circuit 15
Series connection match circuit 13 and amplifier 17, match circuit 13 are connected with coil 11, and amplifier 17 is connected with common mode chokes ring 19.
Specifically, the quantity of communication link is 32；Tuning capacitance and diode are provided in coil 11, the tuning capacitance
Frequency for 123.2MHz, which is PIN type diode；13 inside of match circuit includes at least inductance and capacitance, is used for
Generate 50 ohm of noise resistance；15 inside of phase-shift circuit includes at least inductance and capacitance, for generating 50 ohm of noise resistance
It is anti-.It should be noted that the coil 11 in whole communication links is tuned to system resonance frequency by the coil 11 by tuning capacitance
Rate.The amplifier 17 is preamplifier 17, and system is by match circuit 13 and phase-shift circuit 15 by impedance matching to preceding storing
Big device 17 obtains optimal noise resistance, and optimal noise resistance is 50 ohm, meanwhile, the line in each communication link
Circle 11 is connected with the amplifier of low input impedance 17, is realized and is improved the effect that coil 11 decouples.PIN type diode help is controlled
System processed carries out detuning when coil 11 emits, and the direct current supply of PIN type diode can be provided by magnetic resonance system.In addition, line
Circle 11 is connected with control circuit 10, and control is connected with common mode chokes ring 19, and the common mode chokes ring 19 is in suppression coil 11
Common mode current enables coil 11 to obtain high s/n ratio.
The present embodiment is also provided combines coil using the neck of the control system, including pedestal 30 and combines coil 20,
In, pedestal 30 includes inner cavity, and joint coil 20 includes several head units 21 and several neck units 22, head unit 21
Quantity for 24, each head unit 21 is close on the inner cavity of pedestal 30, the quantity of neck unit 22 8, each
A neck unit 22 is close on the inner cavity of pedestal 30.
Specifically, inner cavity includes head chamber 31 and neck chamber 32, and head unit 21 is arranged at head chamber 31, neck unit 22
It is arranged at neck chamber 32；Head unit 21 is connected with neck unit 22 by the way of overlapping；Head unit 21 is fixed shape
Structure, neck unit 22 are flexible structure.It should be noted that head unit 21 and neck unit 22 are close on inner cavity, shape
Into search coverage, head unit 21 is fixed on the head chamber 31 in geometry, when the head of patient is located at head chamber 31, head
Portion's unit 21 will not change shape with patients head's difference；And neck unit 22 is flexible structure, when patient receives to scan,
The neck of patient is located at neck chamber 32, and between different patients, neck unit 22 can be appropriately curved, ensures coil and patient's neck
Portion fits closely.In addition, being connected between head unit 21 and neck unit 22 by the way of overlapping, overlapping type connection can be helped
Head unit 21 and neck unit 22 is helped to be decoupled respectively, when each coil is connected with the amplifier 17 of low input impedance,
Can further improve the effect of decoupling, improve the ability that coil obtains signal-to-noise ratio, realize head and neck are carried out simultaneously into
Picture.The present embodiment by clinical experiments have proved that be scanned on 3T magnetic resonance systems, while head and neck are carried out into
Picture, the resolution ratio for obtaining the outer arterial images of three-dimensional encephalic reach 0.6mm × 0.6mm × 0.6mm, meet Clinical practice requirement.
In conclusion a kind of coil control system and neck for magnetic resonance imaging provided by the invention combines coil,
By reasonable distribution head and the coil unit quantity of neck, the reasonable coil position that head and neck are set so that coil energy
It is enough to cover head and neck simultaneously, high s/n ratio and higher image in different resolution are obtained, realizes and head and neck is carried out simultaneously
Imaging；In addition, in order to ensure that neck unit can be close to be imaged position, neck unit is designed using flexible structure, for difference
Patient, the coil unit of neck can carry out adaptive curved, ensure that coil can fit closely patient's neck, improve into image quality
Amount.
The above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not to the present invention
Embodiment restriction.For those of ordinary skill in the art, can also make on the basis of the above description
Other various forms of variations or variation.There is no necessity and possibility to exhaust all the enbodiments.It is all the present invention
All any modification, equivalent and improvement made within spirit and principle etc., should be included in the protection of the claims in the present invention
Within the scope of.
Claims (9)
- A kind of 1. neck joint coil of coil control system for magnetic resonance imaging, which is characterized in that the coil control System includes several communication links, and communication link described in each is gripped including coil (11), control circuit (10) and common mode Ring (19) is flowed, the coil (11) connects the control circuit (10), and the control circuit (10) connects the common mode chokes ring (19), the control circuit (10) includes match circuit (13), phase-shift circuit (15) and amplifier (17), the phase-shift circuit (15) connect the match circuit (13) and amplifier (17), match circuit (13) be connected with coil (11), amplifier (17) and Common mode chokes ring (19) connects；The neck joint coil includes pedestal (30) and joint coil (20), pedestal (30) bag Inner cavity is included, the joint coil (20) includes several head units (21) and several neck units (22), and the head is single The quantity of first (21) is 24, each described head unit (21) is close on the inner cavity of the pedestal (30), the neck The quantity of portion's unit (22) 8, each described neck unit (22) are close on the inner cavity of the pedestal (30), the head Portion's unit (21) and the neck unit (22) are connected respectively with match circuit (13), wherein, the head unit (21) and institute Neck unit (22) is stated as the coil (11).
- 2. neck according to claim 1 combines coil, which is characterized in that is provided with tuning capacitance in the coil (11) And diode.
- 3. neck according to claim 2 combines coil, which is characterized in that the frequency of the tuning capacitance is 123.2MHz, the diode are PIN type diode.
- 4. neck according to claim 1 combines coil, which is characterized in that is included at least inside the match circuit (13) Inductance and capacitance, for generating 50 ohm of noise resistance.
- 5. neck according to claim 1 combines coil, which is characterized in that is included at least inside the phase-shift circuit (15) Inductance and capacitance, for generating 50 ohm of noise resistance.
- 6. neck according to claim 1 combines coil, which is characterized in that the quantity of the communication link is 32.
- 7. neck according to claim 1 combines coil, which is characterized in that the inner cavity includes head chamber (31) and neck Chamber (32), the head unit (21) are arranged at the head chamber (31), and the neck unit (22) is arranged at the neck chamber (32)。
- 8. neck according to claim 7 combines coil, which is characterized in that the head unit (21) and the neck list First (22) are connected by the way of overlapping.
- 9. neck according to claim 8 combines coil, which is characterized in that the head unit (21) is fixed shape knot Structure, the neck unit (22) are flexible structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410854627.3A CN104473644B (en) | 2014-12-31 | 2014-12-31 | A kind of coil control system and neck for magnetic resonance imaging combines coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410854627.3A CN104473644B (en) | 2014-12-31 | 2014-12-31 | A kind of coil control system and neck for magnetic resonance imaging combines coil |
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| Publication Number | Publication Date |
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| CN104473644A CN104473644A (en) | 2015-04-01 |
| CN104473644B true CN104473644B (en) | 2018-05-29 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105487030A (en) * | 2016-01-13 | 2016-04-13 | 深圳市特深电气有限公司 | Head-and-neck multichannel RF coil device for nuclear magnetic resonance imaging system |
| CN107356891A (en) * | 2016-05-09 | 2017-11-17 | 上海联影医疗科技有限公司 | A kind of head coil component for magnetic resonance imaging |
| CN109891258A (en) * | 2016-10-24 | 2019-06-14 | 皇家飞利浦有限公司 | For the balanced to unbalanced transformer in magnetic resonance imaging (MRI) system and using the MRI system of the balanced to unbalanced transformer |
| CN108594145A (en) * | 2018-05-03 | 2018-09-28 | 北京清影华康科技有限公司 | Modular joint imaging coil |
| CN108828478A (en) * | 2018-07-05 | 2018-11-16 | 北京清影华康科技有限公司 | Head-neck-chest joint imaging coil block |
| CN209182485U (en) * | 2018-10-17 | 2019-07-30 | 江阴万康医疗科技有限公司 | Cranium neck one vascular plaque imaging coil |
| US20200246106A1 (en) * | 2019-01-31 | 2020-08-06 | Sino Canada Health Engineering Research Institute (Hefei) Ltd. | Imaging Method for Use in Surgical Procedures |
| CN111505549A (en) * | 2019-01-31 | 2020-08-07 | 中加健康工程研究院(合肥)有限公司 | Movable MRI system |
| US11397229B2 (en) | 2019-03-14 | 2022-07-26 | Shanghai United Imaging Healthcare Co., Ltd. | Local coil apparatus for magnetic resonance imaging |
| CN112557976B (en) * | 2019-09-26 | 2022-10-28 | 上海联影医疗科技股份有限公司 | Head and neck coil and magnetic resonance system |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1201166C (en) * | 2000-02-24 | 2005-05-11 | 通用电器横河医疗系统株式会社 | Receiving coil and magnetic resonance imaging method and equipoment |
| CN100372500C (en) * | 2004-07-02 | 2008-03-05 | 西门子（中国）有限公司 | Array receiving coil of magnetic resonance imaging system |
| DE102006027189A1 (en) * | 2006-06-12 | 2007-12-13 | Siemens Ag | Head coil arrangement for magnetic resonance device, has housing with multiple coils arranged in housing with two movable housing parts for adjustment to different enclosed head sizes, where parts are linear and movable against each other |
| EP2147324A1 (en) * | 2007-05-04 | 2010-01-27 | Koninklijke Philips Electronics N.V. | Method and multi-channel rf transmitter arrangement for generating rf fields |
| US8138762B2 (en) * | 2009-08-24 | 2012-03-20 | Imris Inc. | Coil decoupling for an RF coil array |
| DE102010028163B4 (en) * | 2010-04-23 | 2014-02-20 | Siemens Aktiengesellschaft | Magnetic resonance coil apparatus for a magnetic resonance examination |
| CN101950006A (en) * | 2010-08-17 | 2011-01-19 | 上海辰光医疗科技有限公司 | Intracranial and cervical joint radio frequency coil device for magnetic resonance imaging system |
| CN103698725A (en) * | 2013-11-11 | 2014-04-02 | 深圳先进技术研究院 | Multi-channel radio frequency coil interface device for magnetic resonance imaging system |
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Effective date of registration: 20230221 Address after: 201807 2258 Chengbei Road, Jiading District, Shanghai Patentee after: Shanghai Lianying Medical Technology Co.,Ltd. Address before: 1068 No. 518055 Guangdong city in Shenzhen Province, Nanshan District City Xili University School Avenue Patentee before: SHENZHEN INSTITUTES OF ADVANCED TECHNOLOGY CHINESE ACADEMY OF SCIENCES |