CN2221939Y - Radio-frequency coil device for magnetic resonance imaging system - Google Patents
Radio-frequency coil device for magnetic resonance imaging system Download PDFInfo
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- CN2221939Y CN2221939Y CN 95214003 CN95214003U CN2221939Y CN 2221939 Y CN2221939 Y CN 2221939Y CN 95214003 CN95214003 CN 95214003 CN 95214003 U CN95214003 U CN 95214003U CN 2221939 Y CN2221939 Y CN 2221939Y
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- coil
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- magnetic resonance
- magnetic field
- resonance imaging
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Abstract
The utility model relates to a radio-frequency coil device for a magnetic resonance imaging system. The magnetic resonance imaging system comprises a magnetic field device for generating a stable and constant magnetic field, a magnetic field device for generating a gradient field, and a radio-frequency coil device for exciting an object to be reserved and detecting the magnetic resonance signal generated in the object to be reserved. The radio-frequency coil comprises a plurality of coils which are not in mutual connection but in intercoupling through a radio-frequency magnetic field. The radio-frequency coil with the new structure is provided with less dissipation magnetic fields, so the utility model has high efficiency when exciting the object to be observed, and high signal-to-noise ratio when detecting the magnetic resonance signal generated in the object to be reserved.
Description
This utility model relates to a kind of coil device, be adapted to the medical magnetic resonance imaging system especially, this magnetic resonance imaging system has one to produce the used magnetic field device of steady magnetic field, one and produce the used magnetic field device of gradient fields, one and excite and wait to observe object and detection waits to observe the employed coil device of the magnetic resonance signal that produces in the object.
In existing NMR system, used radio-frequency coil generally adopts the distortion of birdcage coil, saddle coil, solenoid type coil or above various coils etc., under some specific applied environment, there are some shortcomings in above-mentioned various coil, birdcage coil generally is used for the field system that steady magnetic field is a horizontal direction, but for steady magnetic field is the field system of vertical direction, birdcage coil is exciting when waiting to observe object efficient lower, and signal to noise ratio is low when detection waits to observe the magnetic resonance signal that produces in the object; Saddle coil has the above shortcoming of birdcage coil equally, and the magnetic field of saddle coil is very inhomogeneous; Though the solenoid type coil is more suitable for the field system that steady magnetic field is a vertical direction, but the solenoid type coil is subjected to the influence of metal object (as producing the field system of gradient fields) on every side easily, special when the close solenoid type coil of metal object, excite that efficient obviously reduces when waiting to observe object, detect that signal to noise ratio obviously descends when waiting to observe the magnetic resonance signal that produces in the object.
The purpose of this utility model is to overcome above-mentioned deficiency, has proposed a kind of efficient height, new construction coil device that signal to noise ratio is low.
Technical solution of the present utility model realizes in the following manner: a kind of coil device that is used for magnetic resonance imaging system, this magnetic resonance imaging system has one to produce the used magnetic field device of steady magnetic field, one and produce the used magnetic field device of gradient fields, one and excite and wait to observe the used coil device of magnetic resonance signal that object and detection are waited to observe to produce in the object, it is characterized in that: this coil device comprises and a plurality ofly not connecting mutually, the coil that intercouples by radio-frequency (RF) magnetic field.
Because radio-frequency coil of the present utility model comprises and a plurality ofly not connecting mutually, but the coil that intercouples by radio-frequency (RF) magnetic field, therefore the spacing that excites or detect the number that the zone of waiting to observe object can be by adjusting coupling coil freely determines, and can improve the uniformity of radio-frequency (RF) magnetic field in this zone by the capacitance of adjusting the capacitor in each coupled coil.
This utility model adopts the radio-frequency coil of new construction, the loss magnetic field that makes radio-frequency coil seldom, therefore excite when waiting to observe object efficient very high, it is very high to detect when waiting to observe the magnetic resonance signal that produces in the object signal to noise ratio, and have simple in structure, be easy to characteristics such as making.
Accompanying drawing 1 shows the sketch map of this utility model magnetic resonance imaging system.
Accompanying drawing 2 shows the structural representation of coil device.
Accompanying drawing 3 shows another structural representation of coil device.
Below in conjunction with drawings and Examples this utility model is described in further detail.
Magnetic resonance imaging system shown in Fig. 1 comprises that one produces the used magnetic field device 1 of steady uniform magnetic field, produce the used magnetic field device 2 of magnetic gradient field, the power supply 3 that is used for driving magnetic field device 2, produce the used radio-frequency coil 4 of radio-frequency alternating magnetic field, be used to drive the radio frequency source 5 of radio-frequency coil 4, be used for detecting the radio-frequency coil 6 of the magnetic resonance signal that object to be observed produces, be used to amplify the noiselike signal amplifier 7 and the central controller 8 of the signal of radio-frequency coil 6, the radio-frequency coil 4 that is configured in magnetic device 1 and 2 centers on measurement space 9, this measurement space 9 can be patient enough spaces is provided, the test specification of radio-frequency coil 6 comprises the position that patient need check, an also useful radio-frequency coil replaces the situation of radio-frequency coil 4 and radio-frequency coil 6, controlling this coil with a switch is used for exciting and waits to observe object or be used to detect the magnetic resonance signal that object to be observed produces, in this utility model, radio-frequency coil 4 and radio-frequency coil 6 all can adopt the radio-frequency coil of coupled mode.
Among Fig. 2 an embodiment of the present utility model, coil is made up of a plurality of coil units 11,12,13 that do not link mutually or more unit, be fixed into each coil unit as a whole with insulant, each unit by annular conductor 14 and wherein the serial connection capacitor 15 form, ring shaped conductor is made by sheet metal, unitary number and spacing are not limit, radio-frequency (RF) magnetic field is as the criterion obtaining uniformly in the zone of checking, ring shaped conductor 14 can be made different shape to adapt to the needs of different check points.Not limit principle be to make the coil can be at resonance under the operating frequency number of capacitor 15 and the position of capacitor 15 in ring shaped conductor 14 in each coil, and the feeder line 16 of whole winding can be connected on the two ends of certain capacitor.
It among Fig. 3 another embodiment of the present invention, coil is by two mutual disjunct coil units 17,18 form, in use, be fixed into each coil unit as a whole with insulant, coil unit 17 and 18 is half garden shapes, each unit by annular conductor 19 and wherein the serial connection capacitor 20 form, present embodiment has been connected in series two capacitors in ring shaped conductor 19, but in actual applications, the number of the capacitor 20 in each coil and the position of capacitor 20 in ring shaped conductor 19 are not limit, principle is to make the coil can be at resonance under the operating frequency, and the feeder line 21 of whole winding can be connected on the two ends of certain capacitor.
Fig. 2 and Fig. 3 are two embodiment of the present invention, the present invention is not limited to this two embodiment, can be according to different needs design difformities, the coil unit of different numbers, each unit is made up of a plurality of coils that do not link mutually, is fixed into each coil unit as a whole with insulant.Each coil unit is formed by ring shaped conductor and capacitor, and ring shaped conductor is to be made by sheet metal, and capacitor is not limit in residing position, line chart unit and number, and the feeder line of whole winding can be connected on the two ends of certain capacitor.
Claims (4)
1, a kind of coil device that is used for magnetic resonance imaging system, this magnetic resonance imaging system has one to produce the used magnetic field device (1) of steady magnetic field, one and produce the used magnetic field device (2) of gradient fields, one and excite and wait to observe the used radio-frequency coil (4 of magnetic resonance signal that object and detection are waited to observe to produce in the object, 6), it is characterized in that: this radio-frequency coil is not connected mutually by a plurality of, forms by the coil that radio-frequency (RF) magnetic field intercouples.
2, a kind of coil device that is used for magnetic resonance imaging system according to claim 1 is characterized in that: each unit coil is made up of annular conductor and the capacitor that is serially connected in the ring shaped conductor.
3, a kind of coil device that is used for magnetic resonance imaging system according to claim 2, it is characterized in that: ring shaped conductor can be made different shape to adapt to the needs of different check points, the number of capacitor and the capacitor position in ring shaped conductor is not limit in each coil, principle is to make the coil can be at resonance under the operating frequency, and the feeder line of whole winding can be connected on the two ends of certain capacitor.
4, a kind of coil device that is used for the magnetic resonance imaging assembling system according to claim 1 is characterized in that: be fixed into each coil unit as a whole with insulant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95214003 CN2221939Y (en) | 1995-06-05 | 1995-06-05 | Radio-frequency coil device for magnetic resonance imaging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95214003 CN2221939Y (en) | 1995-06-05 | 1995-06-05 | Radio-frequency coil device for magnetic resonance imaging system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2221939Y true CN2221939Y (en) | 1996-03-13 |
Family
ID=33863735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95214003 Expired - Lifetime CN2221939Y (en) | 1995-06-05 | 1995-06-05 | Radio-frequency coil device for magnetic resonance imaging system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2221939Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100443916C (en) * | 2001-09-14 | 2008-12-17 | 皇家飞利浦电子股份有限公司 | Mr coil module |
| CN101231331B (en) * | 2007-01-24 | 2010-09-29 | 西门子（中国）有限公司 | Movement positioning device for MRI nasty coupling coil |
| CN103744041A (en) * | 2013-12-27 | 2014-04-23 | 包头市稀宝博为医疗***有限公司 | Radio frequency coil apparatus used for magnetic resonance imaging |
| CN105393131A (en) * | 2013-07-18 | 2016-03-09 | 皇家飞利浦有限公司 | Laminate design-based radio frequency coil unit for MRI |
| CN106468767A (en) * | 2016-05-30 | 2017-03-01 | 北京理工大学 | Balance drive formula magnetic resonance radio frequency coil based on microstrip line |
| CN109804260A (en) * | 2016-10-10 | 2019-05-24 | 皇家飞利浦有限公司 | Coplanar radio-frequency coil feed |
-
1995
- 1995-06-05 CN CN 95214003 patent/CN2221939Y/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100443916C (en) * | 2001-09-14 | 2008-12-17 | 皇家飞利浦电子股份有限公司 | Mr coil module |
| CN101231331B (en) * | 2007-01-24 | 2010-09-29 | 西门子（中国）有限公司 | Movement positioning device for MRI nasty coupling coil |
| CN105393131A (en) * | 2013-07-18 | 2016-03-09 | 皇家飞利浦有限公司 | Laminate design-based radio frequency coil unit for MRI |
| CN105393131B (en) * | 2013-07-18 | 2019-11-19 | 皇家飞利浦有限公司 | The radio-frequency coil unit based on stack-design for MRI |
| CN103744041A (en) * | 2013-12-27 | 2014-04-23 | 包头市稀宝博为医疗***有限公司 | Radio frequency coil apparatus used for magnetic resonance imaging |
| CN103744041B (en) * | 2013-12-27 | 2017-01-04 | 包头市稀宝博为医疗***有限公司 | A kind of coil device being applied to nuclear magnetic resonance |
| CN106468767A (en) * | 2016-05-30 | 2017-03-01 | 北京理工大学 | Balance drive formula magnetic resonance radio frequency coil based on microstrip line |
| CN106468767B (en) * | 2016-05-30 | 2018-09-28 | 北京理工大学 | Balance drive formula magnetic resonance radio frequency coil based on microstrip line |
| CN109804260A (en) * | 2016-10-10 | 2019-05-24 | 皇家飞利浦有限公司 | Coplanar radio-frequency coil feed |
| CN109804260B (en) * | 2016-10-10 | 2021-09-28 | 皇家飞利浦有限公司 | Coplanar radio frequency coil feed |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |