CN109696642B - Radio frequency coil device and magnetic resonance imaging system - Google Patents
Radio frequency coil device and magnetic resonance imaging system Download PDFInfo
- Publication number
- CN109696642B CN109696642B CN201811645950.4A CN201811645950A CN109696642B CN 109696642 B CN109696642 B CN 109696642B CN 201811645950 A CN201811645950 A CN 201811645950A CN 109696642 B CN109696642 B CN 109696642B
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- radio frequency
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- magnet
- magnetic resonance
- receiving coil
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- 238000002595 magnetic resonance imaging Methods 0.000 title claims abstract description 16
- 230000003321 amplification Effects 0.000 claims description 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 2
- 230000003068 static effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 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
- G01R33/34092—RF coils specially adapted for NMR spectrometers
-
- 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
- G01R33/42—Screening
- G01R33/422—Screening of the radio frequency field
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
The invention relates to a radio frequency coil device and a magnetic resonance imaging system, which comprises a magnet, a radio frequency transmitting coil, a radio frequency receiving coil, a radio frequency shielding layer and a signal amplifying and controlling system, wherein the magnet rotates around a center, the radio frequency transmitting coil and the radio frequency receiving coil are both positioned in a rotating plane of the magnet, the radio frequency transmitting coil is arranged in the vertical direction of the rotating plane of the magnet, the radio frequency transmitting coil is round, the radio frequency receiving coil is a multichannel coil, the radio frequency shielding layer is positioned on two poles of the magnet, and the signal amplifying and controlling system is used for amplifying a magnetic resonance signal of the radio frequency receiving coil and providing a driving signal of the radio frequency receiving coil, and selecting a signal channel of the radio frequency receiving coil when the magnet rotates. The invention can lead the application range of the radio frequency coil to be wider.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to a radio frequency coil device and a magnetic resonance imaging system.
Background
In modern medical technology, magnetic resonance imaging systems are already a common medical device. The performance of the radio frequency coil, as an integral part of the system, has a significant impact on the performance of the magnetic resonance imaging system. The prior design of the radio frequency coil device mainly comprises structures such as an orthogonal flat plate type structure, a straight wire type structure and the like, wherein all coils are fixed on a magnet of a magnetic resonance system, and according to a physical principle, the radio frequency coil needs a good radio frequency environment so as to ensure that the resonance frequency of the coil cannot be changed, thus the radio frequency coil belongs to a fixed radio frequency coil.
With the continuous progress of medical technology, a fixed radio frequency coil cannot meet the requirements, and sometimes a radio frequency coil which needs to be moved is disclosed in China patent No. (CN 103744041A), for example, a radio frequency coil device applied to magnetic resonance imaging comprises a power distributor, an upper magnet, a lower magnet, two radio frequency coil units which are longitudinally arranged, an upper radio frequency shielding layer and a lower radio frequency shielding layer, wherein the radio frequency coil units are connected with the power distributor; the upper radio frequency shielding layer and the lower radio frequency shielding layer are respectively positioned at the upper side and the lower side of the radio frequency coil unit, are parallel to each other and are respectively arranged on the upper magnet and the lower magnet; the radio frequency coil unit, the upper radio frequency shielding layer and the lower radio frequency shielding layer are in a central symmetry shape. Although the conversion efficiency of the radio frequency coil unit can be improved, the moving range of the radio frequency coil is limited, and after the moving range is out of range, the resonance frequency of the radio frequency coil can be changed greatly, so that the wide use of the radio frequency coil unit is affected.
Disclosure of Invention
Therefore, the invention aims to solve the technical problem that the application range of the radio frequency coil is narrow due to easy deviation of the resonance frequency in the prior art, and provides the radio frequency coil device and the magnetic resonance imaging system which can avoid the deviation of the resonance frequency and expand the application range.
In order to solve the technical problems, the radio frequency coil device comprises a magnet, a radio frequency transmitting coil, a radio frequency receiving coil, a radio frequency shielding layer and a signal amplifying and controlling system, wherein the magnet rotates around a center, the radio frequency transmitting coil and the radio frequency receiving coil are both positioned in a rotating plane of the magnet, the radio frequency transmitting coil is arranged in the vertical direction of the rotating plane of the magnet, the radio frequency transmitting coil is round, the radio frequency receiving coil is a multichannel coil, the radio frequency shielding layer is positioned on two poles of the magnet, and the signal amplifying and controlling system is used for amplifying magnetic resonance signals of the radio frequency receiving coil and providing driving signals of the radio frequency receiving coil and selecting signal channels of the radio frequency receiving coil when the magnet rotates.
In one embodiment of the present invention, the number of the radio frequency transmitting coils is at least two, and the radio frequency transmitting coils are arranged in parallel with each other.
In one embodiment of the invention, the radio frequency receiving coil is located between two adjacent radio frequency transmitting coils.
In one embodiment of the invention, the multi-channel coil has at least more than three channels.
In one embodiment of the invention, the multichannel coil is in the form of a loop lap joint.
In one embodiment of the invention, the radio frequency receiving coil is placed on the center of the magnet.
In one embodiment of the present invention, the number of turns of the radio frequency transmitting coil is greater than or equal to 1, and the line width is greater than or equal to 0.1cm.
In one embodiment of the present invention, the number of turns of the radio frequency transmitting coil is 2, and the line width is 2cm.
The invention also provides a magnetic resonance imaging system, which comprises the radio frequency coil device.
In one embodiment of the invention, a power divider is further included and is coupled to the radio frequency transmit coil.
Compared with the prior art, the technical scheme of the invention has the following advantages:
According to the radio frequency coil device and the magnetic resonance imaging system, the radio frequency transmitting coil is circular, the performance of the radio frequency transmitting coil is guaranteed, the radio frequency receiving coil is a multichannel coil, the radio frequency shielding layers are arranged on two poles of the magnet, a fixed radio frequency environment can be provided for the radio frequency transmitting coil through the radio frequency shielding layers, meanwhile, the radio frequency field generated by the radio frequency transmitting coil can be more uniform, the signal amplifying and controlling system is used for amplifying magnetic resonance signals of the radio frequency receiving coil, providing driving signals of the radio frequency receiving coil, selecting signal channels of the radio frequency receiving coil when the magnet rotates, optimizing signals of the radio frequency receiving coil through the channels of the selective receiving coil in the magnet rotating process, and therefore the problem of application of the radio frequency coil under the rotating condition can be solved, and the application range of the radio frequency coil is wider.
Drawings
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings, in which
FIG. 1 is a schematic diagram of a radio frequency coil apparatus of the present invention;
FIG. 2 is another schematic diagram of a radio frequency coil apparatus of the present invention;
fig. 3 is a schematic diagram of a multichannel coil of the invention.
Description of the specification reference numerals: 10-magnet, 11-radio frequency transmitting coil, 12-radio frequency receiving coil, 13-radio frequency shielding layer, 14-signal amplifying and controlling system.
Detailed Description
Example 1
As shown in fig. 1 and 2, the present embodiment provides a radio frequency coil device, which includes a magnet 10, a radio frequency transmitting coil 11, a radio frequency receiving coil 12, a radio frequency shielding layer 13, and a signal amplifying and controlling system 14, wherein the magnet 10 rotates around a center, the radio frequency transmitting coil 11 and the radio frequency receiving coil 12 are both located in a rotation plane of the magnet 10, the radio frequency transmitting coil 11 is disposed in a vertical direction of the rotation plane of the magnet 10, the radio frequency transmitting coil 11 is in a circular shape, the radio frequency receiving coil 12 is a multi-channel coil, the radio frequency shielding layer 13 is located on two poles of the magnet 10, and the signal amplifying and controlling system 14 is used for amplifying a magnetic resonance signal of the radio frequency receiving coil 12, providing a driving signal of the radio frequency receiving coil 12, and selecting a signal channel of the radio frequency receiving coil 12 when the magnet 10 rotates.
The radio frequency coil device of this embodiment includes a magnet 10, a radio frequency transmitting coil 11, a radio frequency receiving coil 12, a radio frequency shielding layer 13, and a signal amplifying and controlling system 14, wherein the magnet 10 rotates around a center, the magnet 10 is used for providing a main magnetic field, the radio frequency transmitting coil 11 and the radio frequency receiving coil 12 are both located in a rotation plane of the magnet 10, the radio frequency transmitting coil 11 generates a radio frequency field required by magnetic resonance, the radio frequency transmitting coil 11 is placed in a vertical direction of the rotation plane of the magnet 10, the radio frequency receiving coil 13 receives a magnetic resonance signal, the radio frequency transmitting coil 11 is circular, the magnet 10 can be rotated to an arbitrary angle and is in a static state relative to a radio frequency environment, performance of the radio frequency transmitting coil 11 is ensured, the radio frequency receiving coil 12 is a multi-channel coil, the radio frequency shielding layers 13 are positioned on two poles of the magnet 10, a fixed radio frequency environment can be provided for the radio frequency transmitting coil 11 through the radio frequency shielding layers 13, meanwhile, the radio frequency field generated by the radio frequency transmitting coil 11 can be more uniform, the signal amplifying and controlling system 14 is used for amplifying the magnetic resonance signal of the radio frequency receiving coil 12, providing the driving signal of the radio frequency receiving coil 12, carrying out signal channel selection on the radio frequency receiving coil 12 when the magnet 10 rotates, optimizing the signal of the radio frequency receiving coil 13 through the channel of the selective receiving coil in the rotating process of the magnet 10, thereby achieving the aim of optimizing the performance of the radio frequency receiving coil 13, avoiding the deviation of the resonance frequency and solving the application problem of the radio frequency coil under the rotating condition, the application range of the radio frequency coil is wider.
The number of the radio frequency transmitting coils 11 is at least two, and the radio frequency transmitting coils are arranged in parallel, so that uniformity of radio frequency signals is guaranteed. The radio frequency receiving coil 12 is located between two adjacent radio frequency transmitting coils 11, so as to be beneficial to ensuring uniform transmission of signals. The radio frequency receiving coil 12 is placed on the centre of the magnet 10, thereby helping to ensure efficient reception of signals.
The multi-channel coil has at least three or more channels to facilitate signal transmission by rotating the appropriate channels during rotation of the magnet 10. The multi-channel coil is in a ring lap joint mode, so that the coupling between adjacent channels is eliminated. The multi-channel coil in this embodiment is eight channels, and the channels are mutually overlapped and connected together, so that the coupling between adjacent channels can be eliminated, and the sectional view and the distribution diagram of each channel are shown in fig. 3. During rotation of the magnet 10, the rf transmitting coil 11 is a circular coil, and the magnet 10 rotates to any angle and is stationary relative to the rf environment, whereas for the rf receiving coil 12, during rotation of the magnet 10, there is a weak and messy signal of some channels, affecting the signal-to-noise ratio, and therefore it is necessary to turn off these channels. When the magnet 10 rotates, the signal amplification and control system 14 calculates the angle of the magnet 10, and simultaneously shuts off the channels parallel to the magnet 10 according to the calculation result. The placement of the magnet 10 as described in fig. 1, turns off CH1 and CH5 when the magnet rotates-22.5 ° -22.5 °; when the magnet 10 rotates 22.5-67.5 degrees, the CH4 and CH8 paths are turned off; when the magnet 10 rotates 67.5-112.5 degrees, the CH3 and CH7 paths are turned off; when the magnet 10 rotates 112.5 ° -157.5 °, the CH2 and CH6 paths are turned off. When the rotation is in the opposite direction, the channel is switched every 45 degrees, so that the purpose of optimizing the received signal is achieved.
According to the feasibility of theoretical calculation and engineering application, the number of turns of the radio frequency transmitting coil 11 is more than or equal to 1, and the line width is more than or equal to 0.1cm. The number of turns of the radio frequency transmitting coil is 2, and when the line width is 2cm, a good radio frequency synthesis field uniform region can be obtained, and meanwhile, the conversion efficiency is very high. The magnet 10 has a four-column shape, which facilitates rotation. The rf shielding layer 13 is made of copper with better conductivity, so that the loss of the rf transmitting coil 11 in the rf environment is reduced, and the efficiency of the rf transmitting coil 11 is improved.
Example two
The present embodiment provides a magnetic resonance imaging system, including a radio frequency coil device as described in the embodiment. Thus, the first embodiment has the advantage that the magnetic resonance imaging system also has all.
The magnetic resonance imaging system further comprises a power distributor, the power distributor is connected with the radio frequency transmitting coil 11, the power distributor is used for converting radio frequency signals and transmitting radio frequency signals to the radio frequency transmitting coil 11, and when the magnetic resonance imaging system images, the power distributor is responsible for modulating the radio frequency transmitting signals and converting the radio frequency transmitting signals into analog radio frequency transmitting signals and then transmitting the analog radio frequency transmitting signals to the radio frequency transmitting coil 11 through a radio frequency channel.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present invention will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (6)
1. A radio frequency coil device characterized by: the magnetic resonance signal processing device comprises a magnet, a radio frequency transmitting coil, a radio frequency receiving coil, a radio frequency shielding layer and a signal amplifying and controlling system, wherein the magnet rotates around the center, the radio frequency transmitting coil and the radio frequency receiving coil are both positioned in a rotating plane of the magnet, the radio frequency transmitting coil generates a radio frequency field required by magnetic resonance, the radio frequency transmitting coil is arranged in the vertical direction of the rotating plane of the magnet, the radio frequency receiving coil receives a magnetic resonance signal, the radio frequency transmitting coil is circular, the magnet rotates to an arbitrary angle and is in a static state relative to a radio frequency environment, the radio frequency receiving coil is a multichannel coil, the radio frequency shielding layer is positioned on two poles of the magnet, the signal amplifying and controlling system is used for amplifying the magnetic resonance signal of the radio frequency receiving coil, providing a driving signal of the radio frequency receiving coil, and selecting a signal channel for the radio frequency receiving coil when the magnet rotates;
The multi-channel coil has more than three channels; the multichannel coil is in an annular lap joint mode;
When the magnet rotates, the signal amplification and control system calculates the angle of the magnet, and simultaneously shuts off a channel parallel to the magnet according to a calculation result;
the number of the radio frequency transmitting coils is at least two, and the radio frequency transmitting coils are arranged in parallel;
The radio frequency receiving coils are positioned between two adjacent radio frequency transmitting coils.
2. The radio frequency coil device according to claim 1, wherein: the radio frequency receiving coil is placed on the center of the magnet.
3. The radio frequency coil device according to claim 1, wherein: the number of turns of the radio frequency transmitting coil is more than or equal to 1, and the line width is more than or equal to 0.1cm.
4. A radio frequency coil device according to claim 3, wherein: the number of turns of the radio frequency transmitting coil is 2, and the line width is 2cm.
5. A magnetic resonance imaging system, characterized by: comprising a radio frequency coil device as claimed in any one of claims 1-4.
6. The magnetic resonance imaging system of claim 5, wherein: the power divider is connected with the radio frequency transmitting coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811645950.4A CN109696642B (en) | 2018-12-29 | 2018-12-29 | Radio frequency coil device and magnetic resonance imaging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811645950.4A CN109696642B (en) | 2018-12-29 | 2018-12-29 | Radio frequency coil device and magnetic resonance imaging system |
Publications (2)
| Publication Number | Publication Date |
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| CN109696642A CN109696642A (en) | 2019-04-30 |
| CN109696642B true CN109696642B (en) | 2024-06-04 |
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| CN201811645950.4A Active CN109696642B (en) | 2018-12-29 | 2018-12-29 | Radio frequency coil device and magnetic resonance imaging system |
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Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6466018B1 (en) * | 2000-04-03 | 2002-10-15 | General Electric Company | Rotating body coil apparatus for interventional magnetic resonance imaging |
| WO2006134557A1 (en) * | 2005-06-16 | 2006-12-21 | Koninklijke Philips Electronics, N.V. | Rf volume coil with selectable field of view |
| CN101073017A (en) * | 2004-12-06 | 2007-11-14 | 皇家飞利浦电子股份有限公司 | Methods and apparatuses for connecting receive coils in magnetic resonance imaging scanners |
| CN101158715A (en) * | 2006-10-06 | 2008-04-09 | Ge医疗系统环球技术有限公司 | Magnetic resonance imaging apparatus, magnetic resonance imaging method, scan apparatus, program and storage medium |
| WO2009153727A2 (en) * | 2008-06-20 | 2009-12-23 | Koninklijke Philips Electronics N.V. | Inductive power transfer system |
| CN101622549A (en) * | 2007-02-26 | 2010-01-06 | 皇家飞利浦电子股份有限公司 | Sinusoidally resonant radio frequency volume coils for high field magnetic resonance applications |
| WO2011122086A1 (en) * | 2010-03-30 | 2011-10-06 | 株式会社 日立メディコ | Rf reception coil and magnetic resonance imaging apparatus using same |
| WO2011148278A1 (en) * | 2010-05-27 | 2011-12-01 | Koninklijke Philips Electronics N.V. | Decoupling of multiple channels of an mri rf coil array |
| WO2012060304A1 (en) * | 2010-11-01 | 2012-05-10 | 独立行政法人放射線医学総合研究所 | Pet-mri device |
| CN103744041A (en) * | 2013-12-27 | 2014-04-23 | 包头市稀宝博为医疗系统有限公司 | Radio frequency coil apparatus used for magnetic resonance imaging |
| CN104507386A (en) * | 2012-06-15 | 2015-04-08 | 通用医疗公司 | System and method for portable magnetic resonance imaging and using rotating array of permanent magnets |
| CN105286864A (en) * | 2014-06-30 | 2016-02-03 | 中国科学院上海生命科学研究院 | Integrated coil, special for non-human primates, in magnetic resonance imaging system |
| FR3049714A1 (en) * | 2016-03-29 | 2017-10-06 | Univ Aix Marseille | METHOD FOR CONTROLLING RADIOFREQUENCY MAGNETIC FIELD DISTRIBUTION IN A MAGNETIC RESONANCE IMAGING SYSTEM |
| CN108627783A (en) * | 2017-03-23 | 2018-10-09 | 通用电气公司 | Radio frequency coil arrays and magnetic resonance imaging emission array |
| CN109073717A (en) * | 2016-04-04 | 2018-12-21 | 皇家飞利浦有限公司 | RF emission system with the optional driving port for MR imaging apparatus |
| CN109738839A (en) * | 2018-12-29 | 2019-05-10 | 佛山瑞加图医疗科技有限公司 | Rf coil system applied to rotation magnetic resonance |
| CN210123469U (en) * | 2018-12-29 | 2020-03-03 | 佛山瑞加图医疗科技有限公司 | Radio frequency coil device and magnetic resonance imaging system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9239314B2 (en) * | 2013-03-13 | 2016-01-19 | Endomagnetics Ltd. | Magnetic detector |
-
2018
- 2018-12-29 CN CN201811645950.4A patent/CN109696642B/en active Active
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6466018B1 (en) * | 2000-04-03 | 2002-10-15 | General Electric Company | Rotating body coil apparatus for interventional magnetic resonance imaging |
| CN101073017A (en) * | 2004-12-06 | 2007-11-14 | 皇家飞利浦电子股份有限公司 | Methods and apparatuses for connecting receive coils in magnetic resonance imaging scanners |
| WO2006134557A1 (en) * | 2005-06-16 | 2006-12-21 | Koninklijke Philips Electronics, N.V. | Rf volume coil with selectable field of view |
| CN101158715A (en) * | 2006-10-06 | 2008-04-09 | Ge医疗系统环球技术有限公司 | Magnetic resonance imaging apparatus, magnetic resonance imaging method, scan apparatus, program and storage medium |
| CN101622549A (en) * | 2007-02-26 | 2010-01-06 | 皇家飞利浦电子股份有限公司 | Sinusoidally resonant radio frequency volume coils for high field magnetic resonance applications |
| WO2009153727A2 (en) * | 2008-06-20 | 2009-12-23 | Koninklijke Philips Electronics N.V. | Inductive power transfer system |
| WO2011122086A1 (en) * | 2010-03-30 | 2011-10-06 | 株式会社 日立メディコ | Rf reception coil and magnetic resonance imaging apparatus using same |
| WO2011148278A1 (en) * | 2010-05-27 | 2011-12-01 | Koninklijke Philips Electronics N.V. | Decoupling of multiple channels of an mri rf coil array |
| WO2012060304A1 (en) * | 2010-11-01 | 2012-05-10 | 独立行政法人放射線医学総合研究所 | Pet-mri device |
| JP2012095819A (en) * | 2010-11-01 | 2012-05-24 | Natl Inst Of Radiological Sciences | Pet-mri apparatus |
| CN104507386A (en) * | 2012-06-15 | 2015-04-08 | 通用医疗公司 | System and method for portable magnetic resonance imaging and using rotating array of permanent magnets |
| CN103744041A (en) * | 2013-12-27 | 2014-04-23 | 包头市稀宝博为医疗系统有限公司 | Radio frequency coil apparatus used for magnetic resonance imaging |
| CN105286864A (en) * | 2014-06-30 | 2016-02-03 | 中国科学院上海生命科学研究院 | Integrated coil, special for non-human primates, in magnetic resonance imaging system |
| FR3049714A1 (en) * | 2016-03-29 | 2017-10-06 | Univ Aix Marseille | METHOD FOR CONTROLLING RADIOFREQUENCY MAGNETIC FIELD DISTRIBUTION IN A MAGNETIC RESONANCE IMAGING SYSTEM |
| CN109073717A (en) * | 2016-04-04 | 2018-12-21 | 皇家飞利浦有限公司 | RF emission system with the optional driving port for MR imaging apparatus |
| CN108627783A (en) * | 2017-03-23 | 2018-10-09 | 通用电气公司 | Radio frequency coil arrays and magnetic resonance imaging emission array |
| CN109738839A (en) * | 2018-12-29 | 2019-05-10 | 佛山瑞加图医疗科技有限公司 | Rf coil system applied to rotation magnetic resonance |
| CN210123469U (en) * | 2018-12-29 | 2020-03-03 | 佛山瑞加图医疗科技有限公司 | Radio frequency coil device and magnetic resonance imaging system |
Non-Patent Citations (3)
| Title |
|---|
| Open design and flat cross sectional RF transmit coil for transverse magnet based MRI systems;B.McCarten等;1993 IEEE conference record nuclear science symposium and medical imaging conference;20020806;全文 * |
| 开放式永磁磁共振成像系统中的平板式正交发射线圈的设计;褚旭, 朱晓敏, 蒋晓华;电工电能新技术;20050423(第02期);全文 * |
| 永磁微型磁共振成像仪的射频线圈及鼠成像实验;侯淑莲;谢寰彤;陈伟;王广新;赵强;李石玉;;生物医学工程学杂志;20141025(第05期);全文 * |
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