CN101803921B - Device for identifying radio frequency coil in nuclear magnetic resonance system - Google Patents
Device for identifying radio frequency coil in nuclear magnetic resonance system Download PDFInfo
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- CN101803921B CN101803921B CN2010101305920A CN201010130592A CN101803921B CN 101803921 B CN101803921 B CN 101803921B CN 2010101305920 A CN2010101305920 A CN 2010101305920A CN 201010130592 A CN201010130592 A CN 201010130592A CN 101803921 B CN101803921 B CN 101803921B
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Abstract
The invention discloses a device for identifying a radio frequency coil in a nuclear magnetic resonance system, which comprises a direct current power supply module for providing an identification level signal, a socket arranged on a sickbed and a plug connected to the identified coil and matched with the socket, wherein the socket is provided with a level pin and a coding pin, the level pin of the socket is connected with the direct current power supply module, and the coding pin of the socket is connected with a control module. Also disclosed is a method of identifying a radio frequency coil, the direct current power module emitting a positive level signal; transmitting the positive level signal to a socket level pin; the plugs and the sockets of different identified coils are in butt joint, and the level signals are fed back to the control module for identification through different coding rules. The invention adopts level coding mode identification, has simple principle, reasonable structure and convenient use, can automatically identify different types of coils, effectively ensures the automatic switching of the working states of the coils and ensures the safe and normal work of the coils.
Description
Technical field
The present invention relates to the nuclear magnetic resonance, NMR field, specifically belong to a kind of device of in NMR system, discerning radio-frequency coil.
Background technology
NMR (Nuclear Magnetic Resonance)-imaging (MRI) equipment is the medical diagnostic apparatus that has grown up since the eighties in last century, obtain to its no wound the image of any tomography in partes corporis humani position, can obtain soft-tissue image clearly, obtain human anatomy information, be current the discovery and diagnosis early-stage cancer and the state-of-the-art clinical diagnostic device of other multiple diseases, all come into one's own at international medical community and technos.
Radio-frequency coil is one of core component of NMR (Nuclear Magnetic Resonance)-imaging equipment, can be divided into transmitting coil, transmit-receive sharing coil and receiving coil, and receiving coil divides single channel receiving coil and multichannel receiving coil again.The radio-frequency field that the transmit-receive sharing coil produces is very even, and same coil is all used in exciting and receiving of magnetic resonance signal, such as the birdcage head coil; Transmitting coil is often referred to big body coil, can produce very large-scale even radio-frequency field, only is used for excite magnetic resonance signals; Receiving coil only is used for receiving magnetic resonance signals, produces radio-frequency field relatively uniformly in imaging region, the signal to noise ratio height of received signal, and transmitting coil must be used with receiving coil.Therefore, radio-frequency coil has two kinds of mode of operations: the transmission and reception pattern between same coil transmit-receive sharing pattern and different coils.
In NMR system, the coupling between the coil can reduce signal to noise ratio, influences picture quality.In order to reduce interacting in the coil, coil working must fall other coil off resonances when the transmit-receive sharing pattern, must fall the 54 complete off resonances of cardinal principle transmitting coil during such as the use head coil.And coil working is when transmission and reception pattern, must allow cardinal principle transmitting coil 54 be operated on the resonant frequency at launching phase, the receiving coil off resonance produces uniform radio-frequency field excite magnetic resonance signals, and need off resonance body transmitting coil in the reception stage, allow receiving coil be operated on the resonant frequency.If can not the control coil mode of operation switch, may cause the equipment can't operate as normal.For example, little many of the radio-frequency power that the radio-frequency power that the transmit-receive sharing coil needs needs than pure receiving coil, the nuclear magnetic resonance imaging system of no recognition device, when mistake during transmit-receive sharing coil connecting system, but the radio-frequency power of emission is failed switching, and coil capacity is easy to be burnt out by high-power radiofrequency signal, cause the coil cisco unity malfunction, signal noise ratio (snr) of image descends, and the coil inside copper sheet burns out when serious, causes coil to be scrapped.Therefore system need automatically identify the dissimilar of coil, automaticallyes switch on two kinds of mode of operations according to the result who discerns, and makes different coil workings in different mode of operations, guarantees coil safety.
Summary of the invention
The present invention seeks to: a kind of device of discerning radio-frequency coil in NMR system is provided, can discern the dissimilar of coil automatically, the system that makes controls different coil workings automatically at different working modes according to recognition result, guarantees coil safety and operate as normal.
The technical scheme of the device of identification radio-frequency coil in NMR system that the present invention proposes is: comprise a DC power supplier that the identification level signal is provided, on one's sick bed socket is installed, is connected and is identified on the coil and the plug that cooperates with described socket, described socket is provided with level stitch and coding stitch, the level stitch of described socket is connected with described DC power supplier, and the coding stitch of described socket is connected with a control module.
The more detailed technical scheme of the device of identification radio-frequency coil in NMR system that the present invention proposes is: the identification level signal in the described DC power supplier is a positive direct-current voltages, and described positive level and ground level are connected on two level stitch of socket;
Described socket is the hybrid radio frequency socket, and described plug is the hybrid radio frequency plug, and the signal of socket and plug and power supply are isolated mutually;
Be respectively positive level stitch and ground level stitch with corresponding two stitch of the level stitch of socket in the described plug, the positive level stitch of described plug and the positive level stitch of socket be short circuit mutually, and the ground level stitch of described plug and the ground level stitch of socket be short circuit mutually; With the positive level stitch of one of corresponding coding stitch of coding stitch of socket and plug short circuit mutually, other coding stitch of described plug and the ground level stitch of plug be short circuit mutually in the described plug;
The coding stitch of described socket and plug does not conflict with the level stitch, and its coding pin number Duos one than the pattern count that is identified coil, and a coding stitch that wherein links to each other with the ground level stitch is that sky connects identification;
The described coil that is identified comprises transmit-receive sharing coil and pure receiving coil, and wherein pure receiving coil comprises single channel receiving coil and multichannel receiving coil;
The level stitch of described socket links to each other with control module with DC power supplier by cable respectively with the coding stitch, and the coding stitch on the described plug links to each other with level stitch on it by cable.
The method of discerning radio-frequency coil in NMR system that the present invention proposes may further comprise the steps:
Step 1, DC power supplier are sent a positive level signal;
The plug that step 3, difference are identified coil docks with the socket of sick bed, and level signal feeds back in the control module through different coding rules and discerns.
The more detailed technical scheme of the method for identification radio-frequency coil in NMR system that the present invention proposes is: the positive level signal passes by cable that filter band is connected on the socket between shielding in the described step 2; The level signal criterion of identification of control module is the level interval in the described step 3.
Advantage of the present invention is:
1. the principle of the invention is simple, and is rational in infrastructure, easy to use, discerns the type of coil by level signal, simple and easy to do, guarantees that effectively the duty of coil automaticallyes switch.
2. the present invention adopts the level coding pattern to carry out the method for coil identification, can discern the dissimilar of coil automatically, and the system that makes controls different coil workings automatically at different working modes according to recognition result, guarantees coil safety and operate as normal.
Description of drawings
Below in conjunction with drawings and Examples the present invention is further described:
Fig. 1 is a connection diagram of the present invention;
Fig. 2 is the device connection diagram of DC power supplier of the present invention, control module and socket;
Fig. 3 is the connection diagram of transmit-receive sharing coil of the present invention;
Fig. 4 is the connection diagram of single channel receiving coil of the present invention;
Fig. 5 is the connection diagram of multichannel receiving coil of the present invention;
Fig. 6 is the schematic flow sheet of method among the present invention.
Wherein: 1 is DC power supplier; 2 is socket; 3 is control module; 41 is transmit-receive sharing coil plug; 42 is single channel receiving coil plug; 43 is multichannel receiving coil plug; 51 is the transmit-receive sharing coil; 52 is the single channel receiving coil; 53 is the multichannel receiving coil; 54 is the cardinal principle transmitting coil; 6 is radio frequency amplifier; 7 is spectrometer; 001～004,011～014,021～024,031～034 is power cable.
The specific embodiment
Embodiment: a kind of device of discerning radio-frequency coil in NMR system as shown in Figure 2, comprises DC power supplier 1, installation socket 2, control module 3 on one's sick bed that the identification level signal is provided.Identification level signal in the described DC power supplier 1 is as the datum of coil recognition coding, it is a positive direct-current voltages, as the 5V level signal, No. 9 stitch and No. 11 stitch of described socket 2 are the level stitch, 1～No. 4 stitch is the coding stitch, described 5V positive level is connected on No. 9 stitch of socket 2, and ground (GND) level is connected on No. 11 stitch of socket 2, and the coding stitch of described socket 2 is connected with control module 3.
Described radio-frequency coil comprises transmit-receive sharing coil 51 and pure receiving coil, wherein pure receiving coil comprises single channel receiving coil 52 and multichannel receiving coil 53, be connected with transmit-receive sharing coil plug 41 on the described transmit-receive sharing coil 51, be connected with single channel receiving coil plug 42 on the single channel receiving coil 52, be connected with multichannel receiving coil plug 43 on the multichannel receiving coil.
Described socket 2 is a D type hybrid radio frequency socket, described transmit-receive sharing coil plug 41, single channel receiving coil plug 42, multichannel receiving coil plug 43 are the D type hybrid radio frequency plug that cooperates with socket 2, and the signal of socket 2 and three kind of plug and power supply are isolated mutually.
Be respectively No. 9 positive level stitch and No. 11 ground level stitch with corresponding two stitch of the level stitch of socket 2 in the described plug, the positive level stitch of described plug and the positive level stitch of socket 2 be short circuit mutually, and the ground level stitch of described plug and the ground level stitch of socket 2 be short circuit mutually; With the positive level stitch of one of corresponding coding stitch of coding stitch of socket 2 and plug short circuit mutually, other coding stitch of described plug and the ground level stitch of plug be short circuit mutually in the described plug.
The coding stitch of described socket 2 and plug does not conflict with the level stitch, and its coding pin number Duos one than the pattern count that is identified coil, and a coding stitch that wherein links to each other with the ground level stitch is that sky connects identification.Coil totally three kinds of patterns among the present invention are so the coding stitch is selected four pins.
Four coded signals of control module 3 are connected to 1～No. 4 stitch of the D type hybrid radio frequency socket 2 on the superconducting magnetic resonance imaging system sick bed by the filter band filtering of power cable 001～004 through between shielding.The 5V level signal of DC power supplier 1 is received No. 9 stitch of the D type hybrid radio frequency socket 2 on the above-mentioned sick bed, and ground (GND) level signal is connected to stitch No. 11.
It is that different radio-frequency coils is defined as different codings that the present invention uses the thought of code identification, and control module 3 is defined as " 1 " when receiving the 5V level signal, is defined as when receiving ground (GND) level signal " 0 ".The connection situation of each parts as described above, the identifying of detailed description transmit-receive sharing coil 51, single channel receiving coil 52 and 53 3 kinds of coils of multichannel receiving coil below.
As shown in Figure 3, radio-frequency coil is a transmit-receive sharing coil 51, as head coil, its recognition coding is defined as " 1000 ", promptly in head coil, the 5V level signal is shorted to No. 1 stitch in the transmit-receive sharing coil plug 41 of head coil by power cable 011, and power cable 012～014 is connected to stitch 2～No. 4 with ground level signal (GND).The transmit-receive sharing coil plug 41 of head coil and 2 butt joints of the D type hybrid radio frequency socket on the sick bed, the signal of No. 9 stitch that makes the transmit-receive sharing coil plug 41 of head coil is the signal of the stitch 9 in the D type hybrid radio frequency socket 2 on the sick bed, and the stitch 11 of the transmit-receive sharing coil plug 41 of head coil also is with interior stitch 11 correspondences of D type the mixings socket 2 of sick bed.The transmit-receive sharing coil plug 41 of head coil forms " 1000 " coding with after D type hybrid radio frequency socket 2 on the sick bed docks, and feeds back in the control module 3, and system switches to the transmit-receive sharing pattern.
As shown in Figure 4, radio-frequency coil is a single channel receiving coil 52, and as single channel neck coil, its recognition coding is defined as " 0100 ", and the single channel receiving coil plug 42 of neck coil cooperates with D type hybrid radio frequency socket 2 on the sick bed.The 5V level signal of No. 9 stitch on the single channel receiving coil plug 42 of neck coil is shorted in radio-frequency coil on No. 2 stitch of neck coil by power supply cable 022, and the ground level signal (GND) of No. 11 stitch on the single channel receiving coil plug 42 of neck coil is shorted in radio-frequency coil in the neck coil on the stitch 1,3 and 4 by power cable 021,023 and 024.The single channel receiving coil plug 42 of neck coil forms " 0100 " coding with after D type hybrid radio frequency socket 2 on the sick bed docks, and feeds back in the control module 3, and system switches to the single channel receiving mode.
As shown in Figure 5, radio-frequency coil is a multichannel receiving coil 53, and as four-way neck coil, its recognition coding is defined as " 0010 ", and the four-way receiving coil plug 43 of neck coil cooperates with D type hybrid radio frequency socket 2 on the sick bed.The 5V level signal of No. 9 stitch on the four-way receiving coil plug 43 of neck coil is shorted in radio-frequency coil on No. 3 stitch of neck coil by power supply cable 033, and the ground level signal (GND) of No. 11 stitch on the four-way receiving coil plug 43 of neck coil is shorted to stitch 1,2 and 4 in the neck coil by power supply cable 031,032 and 034 in radio-frequency coil.The four-way receiving coil plug 43 of neck coil forms " 0010 " coding with after D type hybrid radio frequency socket 2 on the sick bed docks, and feeds back in the control module 3, and system switches to the multichannel receiving mode.
A kind of method of discerning radio-frequency coil in NMR system may further comprise the steps:
Step 1, DC power supplier 1 are sent the positive level signal of a 5V;
The D type hybrid radio frequency plug that step 3, difference are identified coil docks with the D type hybrid radio frequency socket 2 of sick bed, and the 5V level signal feeds back in the control module 3 through different coding rules and discerns.
In step 3, level signal may be because of a variety of causes loss or enhancing in the loop, may not level signal originally when feeding back to control module 3, so the identification of 3 pairs of level signals that feed back of control module must be a level interval, otherwise may cause to discern or discerning wrong, thereby make the system works pattern fail handover success, cause coil working undesired even damage.
As Fig. 1, shown in Figure 6, DC power supplier 1 is connected to D type hybrid radio frequency socket 2 on the sick bed with 5V positive level signal and ground (GND) level signal, when being connected on the sick bed D type hybrid radio frequency socket 2, dissimilar coils form recognition coding, repeated transmission is delivered to control module 3, and control module 3 is sent various control signals according to the coil coded signal.For example if transmit-receive sharing coil 51, coded signal is " 1000 ", spectrometer 7 links to each other with radio frequency amplifier 6 and radiofrequency signal to be amplified is provided for radio frequency amplifier 6, spectrometer 7 links to each other with control module 3 provides enable signal, and radio frequency amplifier 6 is connected with transmit-receive sharing coil 51, to finish exciting of signal in the rf power signal input transmit-receive sharing coil 51 that amplify, when rf power signal disappears, receive the magnetic resonance signal that produces by transmit-receive sharing coil 51 again, and guarantee that cardinal principle transmitting coil 54 is in the off resonance state in whole emission receiving course always; If single channel receiving coil 52, coded signal is " 0100 ", radio frequency amplifier 6 will be connected with cardinal principle transmitting coil 54, the rf power signal input of amplifying is finished exciting of signal in the transmitting coil 54 substantially, and in 52 off resonances of launching phase bonding passage receiving coil, and promptly receive the stage in the rf power signal disappearance, and transmitting coil 54 is in the off resonance state substantially, and single channel receiving coil 52 is in the resonant condition receiving magnetic resonance signals; If multichannel receiving coil 53, coded signal is " 0010 ", radio frequency amplifier 6 also is connected with cardinal principle transmitting coil 54, the rf power signal input of amplifying is finished exciting of signal in the transmitting coil 54 substantially, and guarantee 53 off resonances of multichannel receiving coil at launching phase, and when radiofrequency signal disappears, receive the stage, and transmitting coil 54 is in the off resonance state substantially, and multichannel receiving coil 53 is in the resonant condition receiving magnetic resonance signals.
The coding stitch of socket 2 and three kind of plug also can be selected 3 pins in the above-mentioned embodiment, then the coded signal of Dui Ying transmit-receive sharing coil 51 is " 100 ", the coded signal of single channel receiving coil 52 is " 010 ", and the coded signal of multichannel receiving coil 53 is " 001 ".
The principle of the invention is simple, and is rational in infrastructure, easy to use, discerns the type of coil by level signal, simple and easy to do, guarantees that effectively the duty of coil automaticallyes switch; The present invention adopts the level coding pattern to carry out the method for coil identification, can discern the dissimilar of coil automatically, and the system that makes controls different coil workings automatically at different working modes according to recognition result, guarantees coil safety and operate as normal.
Below only be concrete exemplary applications of the present invention, protection scope of the present invention is not constituted any limitation.In addition to the implementation, the present invention can also have other embodiment.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop within the present invention's scope required for protection.
Claims (3)
- One kind in NMR system identification radio-frequency coil device, it is characterized in that: comprise a DC power supplier (1) that the identification level signal is provided, on one's sick bed socket (2) is installed, is connected and is identified on the coil and the plug that cooperates with described socket (2), described socket (2) is provided with level stitch and coding stitch, the level stitch of described socket (2) is connected with described DC power supplier (1), and the coding stitch of described socket (2) is connected with a control module (3);Identification level signal in the described DC power supplier (1) is a positive direct-current voltages, and positive level and ground level are connected on two level stitch of socket (2);Described socket (2) is the hybrid radio frequency socket, and described plug is the hybrid radio frequency plug, and the signal of socket (2) and plug and power supply are isolated mutually;Be respectively positive level stitch and ground level stitch with corresponding two stitch of the level stitch of socket (2) in the described plug, the positive level stitch of the positive level stitch of described plug and socket (2) is short circuit mutually, and the ground level stitch of the ground level stitch of described plug and socket (2) is short circuit mutually; With the positive level stitch of one of corresponding coding stitch of coding stitch of socket (2) and plug short circuit mutually, other coding stitch of described plug and the ground level stitch of plug be short circuit mutually in the described plug;The coding stitch of described socket (2) and plug does not conflict with the level stitch, and its coding pin number Duos one than the pattern count that is identified coil, and a coding stitch that wherein links to each other with the ground level stitch is that sky connects identification.
- 2. the device of in NMR system, discerning radio-frequency coil according to claim 1, it is characterized in that: the described coil that is identified comprises transmit-receive sharing coil (51) and pure receiving coil, wherein pure receiving coil comprises single channel receiving coil (52) and multichannel receiving coil (53), and described plug comprises transmit-receive sharing coil plug (41), single channel receiving coil plug (42) and multichannel receiving coil plug (43).
- 3. the device of in NMR system, discerning radio-frequency coil according to claim 1, it is characterized in that: the level stitch of described socket (2) links to each other with control module (3) with DC power supplier (1) by cable respectively with the coding stitch, and the coding stitch on the described plug links to each other with level stitch on it by cable.
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102158061B (en) * | 2011-01-18 | 2014-04-30 | 苏州安科医疗系统有限公司 | Detuning power supply for magnetic resonance imaging system |
| KR101524466B1 (en) * | 2013-06-21 | 2015-06-01 | 삼성전자주식회사 | Method for providing guide information to imagaing object, method for recomending object, and medical imaging apparatus |
| CN105796059A (en) * | 2016-03-08 | 2016-07-27 | 蚌埠海邻健康管理中心有限公司 | Input device for multi-parameter biomedical signals |
| CN109557488A (en) * | 2017-09-25 | 2019-04-02 | 西门子(深圳)磁共振有限公司 | A kind of magnetic resonance reception module, the reception system of hospital bed and magnetic resonance imaging system |
| CN110794349B (en) * | 2018-08-02 | 2022-05-20 | 西门子(深圳)磁共振有限公司 | Head and neck coil, radio frequency signal processing method and magnetic resonance imaging device |
| CN109581252A (en) * | 2018-12-29 | 2019-04-05 | 安徽硕金医疗设备有限公司 | A kind of Multi-path voltage output device of nuclear magnetic resonance spectrometer front end |
| DE102020204067A1 (en) * | 2020-03-30 | 2021-09-30 | Siemens Healthcare Gmbh | Local coil with detuning function |
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| CN101118278A (en) * | 2006-08-03 | 2008-02-06 | 西门子（中国）有限公司 | Method and device for identifying radio frequency signal receiving coil in MRI system |
| CN101498772A (en) * | 2008-01-29 | 2009-08-05 | 西门子（中国）有限公司 | Identification code circuit of receiving coil in magnetic resonance imaging system |
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| JP3547520B2 (en) * | 1995-04-20 | 2004-07-28 | 株式会社日立メディコ | Magnetic resonance imaging system |
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|---|---|---|---|---|
| CN101118278A (en) * | 2006-08-03 | 2008-02-06 | 西门子（中国）有限公司 | Method and device for identifying radio frequency signal receiving coil in MRI system |
| CN101498772A (en) * | 2008-01-29 | 2009-08-05 | 西门子（中国）有限公司 | Identification code circuit of receiving coil in magnetic resonance imaging system |
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| JP特开平8-280646A 1996.10.29 |
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