CN105548926B - Low-noise flat-panel MRI gradient coil and interface box - Google Patents
Low-noise flat-panel MRI gradient coil and interface box Download PDFInfo
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- CN105548926B CN105548926B CN201610032881.4A CN201610032881A CN105548926B CN 105548926 B CN105548926 B CN 105548926B CN 201610032881 A CN201610032881 A CN 201610032881A CN 105548926 B CN105548926 B CN 105548926B
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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
- G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
- G01R33/385—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using gradient magnetic field coils
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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
- G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
- G01R33/385—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using gradient magnetic field coils
- G01R33/3854—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using gradient magnetic field coils means for active and/or passive vibration damping or acoustical noise suppression in gradient magnet coil systems
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Abstract
The invention discloses a low-noise flat MRI gradient coil and an interface box, comprising a gradient coil, a vacuum bellows and a user interface box, wherein a vacuum cavity is arranged in the gradient coil, a plane coil, a water cooling structure and a damping device are arranged in the vacuum cavity, a first vacuum interface is arranged on the vacuum cavity, a gradient coil interface, a water cooling interface, a temperature detection interface, a second vacuum interface and a vacuum extraction opening are arranged on the user interface box, one end of the vacuum bellows is connected with the first vacuum interface, and the other end of the vacuum bellows is connected with the second vacuum interface.
Description
Technical field:
the invention relates to the technical field of MRI, in particular to a low-noise flat MRI gradient coil and an interface box.
The background technology is as follows:
gradient coils are one of the core components of the MRI (Magnetic Resonance Imaging) system, which primarily function to convert electrical energy to magnetic energy, providing the encoding magnetic fields required for scanning by the magnetic resonance system. During the scanning process, the energized conductors of the gradient coils are subjected to Lorentz force in the magnetic field to cause vibration, so that great noise is generated, and the noise seriously influences the experience of a patient and even the hearing of the patient. With current market products, the main objective of each MRI system manufacturer is to control noise within certain limits, and not to fundamentally solve the noise problem.
F.G.Laipu et al, patent Low Noise MRI Scanner (ZL 97115635.2, US 696077), incorporated by reference, disclose a method for installing superconducting gradient coils in a vacuum chamber of a superconducting magnet that reduces gradient noise, but has considerable difficulty in application and no associated product. How to develop a low noise gradient coil that facilitates application for reduce the noise to noise sensitive crowd, especially be used for the noise of infant's MRI system, this patent provides a low noise dull and stereotyped MRI gradient coil based on vacuum technique, has not only reduced gradient noise, but also can replace traditional gradient coil.
The invention provides a low-noise MRI gradient coil based on vacuum technology and an interface box thereof, and the application is convenient by realizing vacuum and electric interfaces on the interface box.
The invention comprises the following steps:
in view of the above, the present invention provides a low noise flat MRI gradient coil and an interface box.
The invention discloses a low-noise flat-panel MRI gradient coil and an interface box, which comprise a gradient coil, a vacuum bellows and a user interface box, wherein a vacuum cavity is arranged in the gradient coil, a plane coil, a water cooling structure and a damping device are arranged in the vacuum cavity, a first vacuum interface is arranged on the vacuum cavity, the user interface box is provided with the gradient coil interface, the water cooling interface, a temperature detection interface, a second vacuum interface and a vacuum extraction opening, one end of the vacuum bellows is connected with the first vacuum interface, and the other end of the vacuum bellows is connected with the second vacuum interface.
Preferably, the planar coil and the water cooling structure are of an integral structure and are arranged in the vacuum cavity through the damping device.
Preferably, the gradient coil is of a cylindrical structure and is provided with 2 gradient coils, the first vacuum interfaces arranged on each gradient coil are 3, and the number of the vacuum bellows is 3.
Preferably, the user interface box is of a cylindrical structure, the number of the second vacuum interfaces is 2, the number of the gradient coil interfaces is 6, and the number of the water-cooling interfaces is 2.
Preferably, the vacuum extraction opening is connected with a vacuum valve.
The invention has the beneficial effects that: the invention is based on vacuum technology, blocks noise transmission path, gives consideration to torsion balance design and reduces vibration noise; the vibration conduction is reduced by adopting a vibration reduction assembly mode, and the working temperature of the gradient coil can be kept by adopting a temperature control system; the ultra-thin gradient design saves enough space for the vacuum noise reduction structure, and the whole appearance is equivalent to that of the traditional gradient coil, so that the vacuum noise reduction structure can be conveniently interchanged.
Description of the drawings:
for ease of illustration, the invention is described in detail by the following detailed description and the accompanying drawings.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of the internal structure of a gradient coil;
fig. 3 is a schematic diagram of a user interface box structure.
In the figure: 1-gradient coils; 2-vacuum bellows; 3-a user interface box; 4-plane coils; 5-a water cooling structure; 6-a damping device; 7-a vacuum chamber; 8-gradient coil interface; 9-water cooling interface; 10-a temperature detection interface; 11-a second vacuum interface; 12-vacuum extraction opening; 13-first vacuum interface.
The specific embodiment is as follows:
for the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention is described below by means of specific embodiments shown in the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the invention. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present invention.
As shown in fig. 1-3, the present invention provides a technical solution: the utility model provides a dull and stereotyped MRI gradient coil of low noise and interface box, including gradient coil 1, vacuum bellows 2 and user interface box 3, be equipped with vacuum chamber 7 in the gradient coil 1, be equipped with planar coil 4 in the vacuum chamber 7, water-cooling structure 5 and damping device 6, be equipped with first vacuum interface 13 on the vacuum chamber 7, be equipped with gradient coil interface 8 on the user interface box 3, water-cooling interface 9, temperature detection interface 10, second vacuum interface 11 and vacuum extraction opening 12, vacuum bellows 2 one end is connected with first vacuum interface 13, the other end is connected with second vacuum interface 11.
Specifically, the planar coil 4 and the water cooling structure 5 are of an integral structure and are arranged in the vacuum cavity 7 through the damping device 6; the gradient coil 1 is of a cylindrical structure and is provided with 2, the first vacuum interfaces 13 arranged on each gradient coil 1 are 3, each gradient coil 1 comprises X, Y, Z groups of coils, so that 3 paths of gradient signal lines are uniformly distributed to the 3 first vacuum interfaces 13 for connection, and one path of gradient signal is passed through each joint. The vacuum bellows 2 is a group of 3, and the user interface box is of a 3-cylinder structure, so that the gradient coil interface 8, the water cooling interface 9, the temperature detection interface 10, the second vacuum interface 11 and the vacuum extraction opening 12 are realized, and the vacuum extraction opening 12 is connected with a vacuum valve.
The working principle is as follows: in the assembly process, the planar coil 4 and the water cooling structure 5 are manufactured according to the design requirement, and are installed in the vacuum cavity 7 through the pre-designed damping device 6, so that a coil part with low noise planar gradient is formed, the vacuum cavity 7 is provided with a first vacuum interface 13 (3 groups), and the vacuum bellows 2 (3 groups) are connected with a second vacuum interface 11 on the user interface box 3, so that three vacuum channels are formed, and a vacuum cavity of the whole coil is formed.
In application, the vacuum cavity 7 is connected to the second vacuum interface 11 of the user interface box 3 through the vacuum bellows 2 to form a vacuum channel, the electric wire of the planar coil 4, the water pipe of the water cooling structure 5, the temperature detection connecting wire and the like enter the user interface box 3 through the channel, the connection of the electric wire and the temperature detection connecting wire and the connection of the water pipe are completed in the user interface box 3, then the interface box is closed to form a vacuum cavity, air in the cavity is pumped out from the vacuum pumping hole 12, the vacuum valve is closed when a certain vacuum degree is reached, and the vacuum cavity is in a vacuum state, so that the isolation and external interface of the vacuum cavity 7 are realized.
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. A low noise flat panel MRI gradient coil and interface box, characterized in that:
the vacuum corrugated pipe comprises a gradient coil, a vacuum corrugated pipe and a user interface box, wherein a vacuum cavity is arranged in the gradient coil, a plane coil, a water cooling structure and a damping device are arranged in the vacuum cavity, the plane coil and the water cooling structure are of an integral structure and are arranged in the vacuum cavity through the damping device, a first vacuum interface is arranged on the vacuum cavity, a gradient coil interface, a water cooling interface, a temperature detection interface, a second vacuum interface and a vacuum extraction opening are arranged on the user interface box, one end of the vacuum corrugated pipe is connected with the first vacuum interface, and the other end of the vacuum corrugated pipe is connected with the second vacuum interface;
the gradient coils are of a cylindrical structure and are provided with 2 first vacuum interfaces, each gradient coil is provided with 3 first vacuum interfaces, each gradient coil comprises three groups of coils, three paths of gradient signal lines are formed in the three groups of coils, the three paths of gradient signal lines are uniformly distributed to the 3 first vacuum interfaces to be connected out, and each first vacuum interface is connected with one path of gradient signal.
2. The low noise flat panel MRI gradient coil and interface box as set forth in claim 1, wherein: the number of the vacuum bellows is 3.
3. The low noise flat panel MRI gradient coil and interface box as set forth in claim 1, wherein:
the user interface box is of a cylindrical structure, 2 groups of second vacuum interfaces are 6, the number of gradient coil interfaces is 6, and the number of water-cooling interfaces is 2.
4. The low noise flat panel MRI gradient coil and interface box as set forth in claim 1, wherein:
the vacuum extraction opening is connected with a vacuum valve.
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| CN201610032881.4A CN105548926B (en) | 2016-01-19 | 2016-01-19 | Low-noise flat-panel MRI gradient coil and interface box |
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| CN105548926B true CN105548926B (en) | 2023-09-26 |
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| CN1179540A (en) * | 1996-08-13 | 1998-04-22 | 通用电气公司 | Low noise magnetic resonance imaging scanner |
| JP2001204710A (en) * | 2000-01-25 | 2001-07-31 | Toshiba Corp | Magnetic resonance imaging device |
| JP2003070765A (en) * | 2001-08-31 | 2003-03-11 | Hitachi Ltd | Magnetic resonance imaging unit and method and material for sound insulation thereof |
| CN102062844A (en) * | 2009-11-18 | 2011-05-18 | 美时医疗技术(上海)有限公司 | Sub-cooled superconductor gradient coil module applicable to magnetic resonance imaging |
| CN102483449A (en) * | 2009-04-17 | 2012-05-30 | 美时医疗控股有限公司 | Cryogenically cooled superconductor gradient coil module for magnetic resonance imaging |
| CN104487858A (en) * | 2012-06-26 | 2015-04-01 | 英国西门子公司 | Method and apparatus for reduction of gradient coil vibration in MRI systems |
| CN205301557U (en) * | 2016-01-19 | 2016-06-08 | 南京磁晨医疗技术有限公司 | Dull and stereotyped MRI gradient coil of low noise and interface box |
-
2016
- 2016-01-19 CN CN201610032881.4A patent/CN105548926B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1179540A (en) * | 1996-08-13 | 1998-04-22 | 通用电气公司 | Low noise magnetic resonance imaging scanner |
| JP2001204710A (en) * | 2000-01-25 | 2001-07-31 | Toshiba Corp | Magnetic resonance imaging device |
| JP2003070765A (en) * | 2001-08-31 | 2003-03-11 | Hitachi Ltd | Magnetic resonance imaging unit and method and material for sound insulation thereof |
| CN102483449A (en) * | 2009-04-17 | 2012-05-30 | 美时医疗控股有限公司 | Cryogenically cooled superconductor gradient coil module for magnetic resonance imaging |
| CN102062844A (en) * | 2009-11-18 | 2011-05-18 | 美时医疗技术(上海)有限公司 | Sub-cooled superconductor gradient coil module applicable to magnetic resonance imaging |
| CN104487858A (en) * | 2012-06-26 | 2015-04-01 | 英国西门子公司 | Method and apparatus for reduction of gradient coil vibration in MRI systems |
| CN205301557U (en) * | 2016-01-19 | 2016-06-08 | 南京磁晨医疗技术有限公司 | Dull and stereotyped MRI gradient coil of low noise and interface box |
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