CN103424725B - Based on the nuclear magnetic resonance chip radio frequency transmission channel of micro-control unit - Google Patents
Based on the nuclear magnetic resonance chip radio frequency transmission channel of micro-control unit Download PDFInfo
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Abstract
The invention discloses a kind of nuclear magnetic resonance chip radio frequency transmission channel based on micro-control unit, comprise the first micro-control unit, second micro-control unit, frequency source module, pulse-series generator module, Pulse Power Magnification module and circuit state modular converter, frequency source module produces three tunnel sinusoidal signals under the first micro-control unit controls, Pulse Power Magnification model calling pulse-series generator module and the second micro-control unit, circuit state modular converter connects Pulse Power Magnification module and the second micro-control unit, compact conformation of the present invention, effectively can reduce circuit size, it is made to be applicable in the middle of magnetic resonance detection chip, simplify circuit topological structure, circuit is made to be easy to control, increase the dirigibility detected, also reduce manufacturing cost, with miniature coils, Micro Magnet coordinates in the middle of nuclear magnetic resonance chip, the deficiency of traditional core magnetic resonance detection method can be made up.
Description
Technical field
The invention belongs to magnetic resonance detection technical field, be specifically related to a kind of nuclear magnetic resonance chip radio frequency transmission channel based on micro-control unit.
Background technology
Magnetic resonance detection technology have detect rapidly, Low emissivity and to advantages such as detected object are harmless, be widely used in the fields such as medical imaging, analysis of the molecular structure, material composition qualification and medical diagnosis on disease.But traditional core magnetic resonance tool is heavy, size is comparatively large, and involves great expense, and limits the universal of magnetic resonance detection technology, so there is the research of magnetic resonance detection chip.Nuclear magnetic resonance chip is primarily of miniature magnetic circuit, micro radio-frequency coil and miniature control circuit composition, and the research being devoted to miniature magnetic circuit and micro radio-frequency coil has a lot, and also achieves much good achievement.The research of nuclear magnetic resonance chip control circuit aspect is relatively less, and the research of most of control circuit aspect is mainly used in traditional large-scale nuclear magnetic resonance apparatus.In the control circuit of nuclear magnetic resonance chip, receiving cable is easy to realize modularization, and the device of Universal, modular can be utilized to build; Radio frequency transmitting channel implementation is more, as frequency source can adopt various oscillatory circuit to realize, pulse can adopt FPGA technology to realize, diplexer can utilize PIN diode and 1/4 wavelength line realization etc., but these implementations cause circuit topological structure complicated, be not easy to control circui, circuit size is relatively large, is not suitable for being used in the middle of nuclear magnetic resonance chip.
Therefore, need a kind of nuclear magnetic resonance chip radio frequency transmission channel based on micro-control unit to realize above-mentioned functions.
Summary of the invention
Goal of the invention: the object of the invention is the deficiency existed for nuclear magnetic resonance chip radio frequency transmission channel in prior art, a kind of nuclear magnetic resonance chip radio frequency transmission channel based on micro-control unit is provided.
Technical scheme: for achieving the above object, the nuclear magnetic resonance chip radio frequency transmission channel that the present invention is based on micro-control unit can adopt following technical scheme:
Based on a nuclear magnetic resonance chip radio frequency transmission channel for micro-control unit, comprise the first micro-control unit, the second micro-control unit, frequency source module, pulse-series generator module, Pulse Power Magnification module and circuit state modular converter,
Described frequency source module produces three tunnel sinusoidal signals under described first micro-control unit controls, and wherein the phase differential of two-way sinusoidal signal is 90 °;
Frequency source module and the second micro-control unit described in described pulse-series generator model calling, continuous print sinusoidal signal is blocked as pulse by described pulse-series generator module under the control of described second micro-control unit;
Pulse-series generator module and the second micro-control unit described in described Pulse Power Magnification model calling, described Pulse Power Magnification module is used for the power output impedance of described pulse-series generator module being matched to 50 Ω normal impedances and amplified pulse sequence, and the open and close of the power amplification of pulse train in described Pulse Power Magnification module are by described second micro-control unit controls;
Described circuit state modular converter connects described Pulse Power Magnification module and the second micro-control unit, described circuit state modular converter, under the control of described second micro-control unit, realizes the conversion receiving NMR signal and launch these two kinds of circuit states of RF excitation pulses.
Further, described frequency source module comprises a DDS module, 2nd DDS module, 3rd DDS module, first active crystal oscillator module and the second active crystal oscillator module, a described DDS module, 2nd DDS module is all connected described first micro-control unit with the 3rd DDS module, described first active crystal oscillator module connects a described DDS module and the 2nd DDS module, described second active crystal oscillator module connects described 3rd DDS module, a described DDS module, 2nd DDS module and the 3rd DDS module produce the controlled continuation sinusoidal of frequency respectively under described first micro-control unit controls.
Further, described pulse-series generator module comprises the first analog switch, the second analog switch, the 3rd analog switch, the 4th analog switch and first liang of path multiplexer, a described DDS module, the first analog switch are connected successively with the second analog switch, and described 2nd DDS module, the 3rd analog switch are connected successively with the 4th analog switch; Described second analog switch and the 4th analog switch are all connected described first liang of path multiplexer, the continuation sinusoidal that a described DDS module exports is cut to the first pulse signal by described first analog switch and the second analog switch, the continuation sinusoidal that described 2nd DDS module exports is cut to the second pulse signal by described 3rd analog switch, the 4th analog switch, and described first liang of path multiplexer is used for described first pulse signal and the second pulse signal to switch to the signal source with 90 ° of phase differential and exports low powder pulsed sequence.
Further, described Pulse Power Magnification module comprises impact damper, power amplifier and the first level amplification module, described impact damper connects described first liang of path multiplexer, described power amplifier connects described impact damper, and described first level amplification module connects described second micro-control unit and power amplifier; The output impedance of described first liang of path multiplexer is matched to 50 Ω by described impact damper; Described power amplifier amplifies described low powder pulsed sequence power, and excited sample produces NMR signal; After the control level of described second micro-control unit is amplified by described first level amplification module, as the power supply of described power amplifier.
Further, described circuit state modular converter comprises second liang of path multiplexer, the 3rd liang of path multiplexer, normal impedance, second electrical level amplification module, three level amplification module, the 4th level amplification module, the 5th level amplification module and the 6th level amplification module, described second liang of path multiplexer connects described power amplifier, described 3rd liang of path multiplexer connects described second liang of path multiplexer, and described normal impedance ground connection also connects described 3rd liang of path multiplexer; Described second electrical level amplification module, three level amplification module, the 4th level amplification module, the 5th level amplification module are all connected described second micro-control unit with the 6th level amplification module,
Described second electrical level amplification module, three level amplification module and the 4th level amplification module are all connected described second liang of path multiplexer,
Described second electrical level amplification module, the 5th level amplification module and the 6th level amplification module are all connected described 3rd liang of path multiplexer,
Described second electrical level amplification module, three level amplification module, the 4th level amplification module, the 5th level amplification module and the 6th level amplification module amplify the port level of described second micro-control unit, described second liang of path multiplexer switches conductive channel under the control of described second micro-control unit, and described 3rd liang of path multiplexer increases the isolation between transmission channel and receiving cable.
Beneficial effect: the nuclear magnetic resonance chip radio frequency transmission channel compact conformation based on micro-control unit of the present invention, effectively can reduce circuit size, make it be applicable in the middle of magnetic resonance detection chip.Simplify circuit topological structure, circuit is made to be easy to control, not only increase the dirigibility in detection method, also reduce manufacturing cost, coordinate with miniature coils, Micro Magnet and be used in the middle of nuclear magnetic resonance chip, the deficiency of traditional core magnetic resonance detection method can be made up, be of value to and promote the universal of magnetic resonance detection technology.
Accompanying drawing explanation
Fig. 1 is the structural representation of the nuclear magnetic resonance chip radio frequency transmission channel based on micro-control unit;
Fig. 2 is the structural representation of frequency source module;
Fig. 3 is the structural representation of pulse-series generator module;
Fig. 4 is the structural representation of Pulse Power Magnification module;
Fig. 5 is the structural representation of circuit state modular converter;
Fig. 6 is based on the radio frequency transmitting channel general diagram of micro-control unit.
Embodiment
Below in conjunction with the drawings and specific embodiments, illustrate the present invention further, these embodiments should be understood only be not used in for illustration of the present invention and limit the scope of the invention, after having read the present invention, the amendment of those skilled in the art to the various equivalent form of value of the present invention has all fallen within the application's claims limited range.
Refer to Fig. 1, Fig. 2, Fig. 3, Fig. 4, shown in Fig. 5 and Fig. 6, nuclear magnetic resonance chip radio frequency transmission channel based on micro-control unit of the present invention, comprise the first micro-control unit 101, second micro-control unit 112, frequency source module, pulse-series generator module, Pulse Power Magnification module and circuit state modular converter, frequency source module, pulse-series generator module, Pulse Power Magnification module is connected successively with circuit state modular converter, pulse-series generator module, Pulse Power Magnification module and circuit state modular converter are all connected the second micro-control unit 112.
Frequency source module produces three tunnel sinusoidal signals under the first micro-control unit 101 controls, wherein the phase differential of two-way sinusoidal signal is 90 °, the sinusoidal signal of this two-way phase differential 90 ° is for generation of pulse train, and an other road sinusoidal signal is as the local oscillation signal of frequency mixer in receiving cable.
Pulse-series generator model calling frequency source module and the second micro-control unit 112, the two-way phase differential that receive frequency source module produces is the sinusoidal signal of 90 °, and under the control of the second micro-control unit 112, continuation sinusoidal is blocked as pulse, and carry out signal switching to change the phase place of sinusoidal signal, to realize multiple pulse train in good time;
Pulse Power Magnification model calling pulse-series generator module and the second micro-control unit 112, Pulse Power Magnification module is used for the output impedance of pulse-series generator module to be matched to 50 Ω, also for the power of amplified pulse sequence, in Pulse Power Magnification module, the open and close of power amplifier are controlled by the second micro-control unit 112;
Circuit state modular converter connects Pulse Power Magnification module and the second micro-control unit 112, circuit state modular converter, under the control of the second micro-control unit 112, realizes the conversion receiving NMR signal and launch these two kinds of circuit states of RF excitation pulses.
Refer to shown in Fig. 2, frequency source module comprises a DDS module 102, the 2nd DDS module 103, the 3rd DDS module 105, first active crystal oscillator module 104 and the second active crystal oscillator module 106.Wherein, DDS module is direct digital frequency synthesier module.One DDS module 102, the 2nd DDS module 103 are all connected the first micro-control unit 101 with the 3rd DDS module 105, first active crystal oscillator module 104 connects a DDS module 102 and the active crystal oscillator module 106 of the 2nd DDS module 103, second connects the 3rd DDS module 105.One DDS module 102, the 2nd DDS module 103 and the 3rd DDS module 105 produce the controlled continuation sinusoidal of frequency respectively under the first micro-control unit 101 controls.Wherein, one DDS module 102 and the 2nd DDS module 103 adopt same first active crystal oscillator 104 to do system clock, transfer control word in a parallel fashion, the frequency of the one DDS module 102 and the 2nd DDS module 103 upgrades port and is controlled by the same control port of the first micro-control unit 101, and such configuration can guarantee that the sinusoidal signal phase differential that a DDS module 102 and the 2nd DDS module 103 export is 90 °; Adopt the second independent active crystal oscillator 106 as the system clock of the 3rd DDS module 105,3rd DDS module 105 adopts serial mode transfer control word, to save the first micro-control unit 101 control port quantity, the continuation sinusoidal that 3rd DDS module 105 produces is used in the mixer module of receiving cable, as local oscillation signal.
Refer to shown in Fig. 3, pulse-series generator module comprises the first analog switch 107, second analog switch 108, the 3rd analog switch 109, the 4th analog switch 110 and first liang of path multiplexer 111.
One DDS module 102, first analog switch 107 is connected successively with the second analog switch 108, and the 2nd DDS module 103, the 3rd analog switch 109 are connected successively with the 4th analog switch 110.First analog switch 107 and the second analog switch 108, as one group, for blocking as pulse by the sinusoidal signal sin ω from frequency source module, are controlled by the same control port of the second micro-control unit 112.3rd analog switch 109 and the 4th analog switch 109, as one group of use, for blocking as pulse by the sinusoidal signal cos ω from frequency source module, are controlled by the same control port of the second micro-control unit 112.Two analog switch series connection use, and can strengthen isolation, improve pulse quality when analog switch cuts out.
Second analog switch 108 is all connected first liang of path multiplexer 111 with the 4th analog switch 110.The continuation sinusoidal that one DDS module 102 exports is cut to the first pulse signal by the first analog switch 107 and the second analog switch 108, the continuation sinusoidal that 2nd DDS module 103 exports is cut to the second pulse signal by the 3rd analog switch 109 and the 4th analog switch 110, and first liang of path multiplexer 111 is for switching to the signal source with 90 ° of phase differential and exporting low powder pulsed sequence by the first pulse signal and the second pulse signal.Wherein, the conductive channel of first liang of path multiplexer 111 is controlled by the second micro-control unit 112, can determine what the pulse Shi Youna road sinusoidal signal of first liang of path multiplexer 111 output produced.When producing spin-echo sequence, CP sequence, only allow by sinusoidal signal sin ω or only allow the pulse train of being blocked by sinusoidal signal cos ω by first liang of path multiplexer; When producing cpmg sequence row, 90 ° of pulses can adopt any road sinusoidal signal, and the sinusoidal signal that it is 90 ° that a series of 180 ° of pulses afterwards need by an other road phase differential produces.The output terminal of pulse train generation module exports lower powered pulse train.
Refer to shown in Fig. 4, Pulse Power Magnification module comprises impact damper 113, power amplifier 114 and the first level amplification module 115.Impact damper 113 connects first liang of path multiplexer 111, and power amplifier 114 connects impact damper 113, and the first level amplification module 115 connects the second micro-control unit 112 and power amplifier 114.
The output impedance of first liang of path multiplexer 111 is matched to measuring resistance by impact damper 113; Power amplifier 114 amplifies low powder pulsed sequence power, and excited sample produces NMR signal; After the control level of the second micro-control unit 102 is amplified by the first level amplification module 115, as the power supply of power amplifier 114.
Impact damper 113 adopts in-phase proportion computing circuit to realize, and for the port Impedance of pulse-series generator module pulse train output terminal is matched to 50 Ω, makes it possible to utilize power amplifier by the power amplification of pulse train.Adopt the control port level of the second micro-control unit 112 to be that power amplifier 114 is powered, this configuration makes the open and close that can be controlled power amplifier by the second micro-control unit 112, when power amplifier 114 is opened, and can the power of amplified pulse sequence; When power amplifier 114 cuts out, output signal is zero.Lower in order to solve the second micro-control unit 112 port level, the problem that driving force is more weak, the first level amplification module 115 is adopted to amplify the second micro-control unit 112 port level, wherein, first level amplification module 115 is the in-phase proportion computing circuit adopting high speed operation amplifier design, to meet the demand of power amplifier 114 pairs of power supplies.Exomonental time, open power amplifier 114, impulse ejection is complete closes power amplifier 114 immediately, can reduce the high-power radio-frequency pulse of radio frequency transmitting channel to the impact of receiving cable.
Refer to shown in Fig. 5, circuit state modular converter comprises second liang of path multiplexer 121, the 3rd liang of path multiplexer 122, normal impedance 123, second electrical level amplification module 116, three level amplification module 117, the 4th level amplification module 118, the 5th level amplification module 119 and the 6th level amplification module 120, second liang of path multiplexer 121 connects power amplifier 114,3rd liang of path multiplexer 122 connects second liang of path multiplexer 121, and normal impedance 123 ground connection also connects the 3rd liang of path multiplexer 122; Second electrical level amplification module 116, three level amplification module 117, the 4th level amplification module 118, the 5th level amplification module 119 are all connected the second micro-control unit 112 with the 6th level amplification module 120.
Second electrical level amplification module 116, three level amplification module 117 are all connected second liang of path multiplexer 121 with the 4th level amplification module 118.
Second electrical level amplification module 116, the 5th level amplification module 119 and the 6th level amplification module 120 are all connected the 3rd liang of path multiplexer 122.
Second electrical level amplification module 116, three level amplification module 117, the 4th level amplification module 118, the 5th level amplification module 119 and the 6th level amplification module 120 amplify the port level of the second micro-control unit, second liang of path multiplexer 121 switches conductive channel under the control of the second micro-control unit, and the 3rd liang of path multiplexer 122 increases the isolation between transmission channel and receiving cable.
Second micro-control unit 112, as control core, controls the selection of second liang of path multiplexer 121 and the 3rd liang of path multiplexer 122 conductive channel.Second to the 6th level amplification module adopts in-phase proportion computing circuit to realize, and for amplifying the level of the second micro-control unit 112, makes control level meet the requirement of second liang of path multiplexer 121 and the 3rd liang of path multiplexer 122.Wherein, second electrical level amplification module 116 provides power supply for second liang of path multiplexer 121 and the 3rd liang of path multiplexer 122, three level amplification module 117 and the 4th level amplification module 118 control the selection of the conductive channel of second liang of path multiplexer 122, and the 5th level amplification module 119 and the 6th level amplification module 120 control the selection of the conductive channel of second liang of path multiplexer 122.Second liang of path multiplexer 122 is for the conversion of realizing circuit launching and receiving state, when circuit is in emission state, passage between receiving cable and radio-frequency coil is blocked, channel conductive between power amplifier 114 and radio-frequency coil, high power pulse sequence enters excited sample in radio-frequency coil, to produce NMR signal; When circuit is in accepting state, the passage between power amplifier 114 and radio-frequency coil is blocked, the channel conductive between receiving cable and radio-frequency coil, and receiving cable receives and subsequent treatment NMR signal.3rd liang of path multiplexer 122 for increasing the isolation between transmission channel and receiving cable, to alleviate the pulse of transmission channel high power RF to the impact of receiving cable.When circuit is in emission state, transmission channel and receiving cable are isolated by the 3rd liang of path multiplexer 122, from transmission channel reveal pulse after the 3rd liang of path multiplexer, by 50 Ω normal impedances flow into ground, significantly can reduce the impact of transmission channel high power pulse on receiving cable.
Nuclear magnetic resonance chip radio frequency transmission channel compact conformation based on micro-control unit of the present invention, effectively can reduce circuit size, make it be applicable in the middle of magnetic resonance detection chip.Simplify circuit topological structure, circuit is made to be easy to control, not only increase the dirigibility in detection method, also reduce manufacturing cost, coordinate with miniature coils, Micro Magnet and be used in the middle of nuclear magnetic resonance chip, the deficiency of traditional core magnetic resonance detection method can be made up, be of value to and promote the universal of magnetic resonance detection technology.
Claims (5)
1. the nuclear magnetic resonance chip radio frequency transmission channel based on micro-control unit, it is characterized in that, comprise the first micro-control unit (101), the second micro-control unit (112), frequency source module, pulse-series generator module, Pulse Power Magnification module and circuit state modular converter
Described frequency source module is generation three tunnel sinusoidal signal under described first micro-control unit (101) controls, and wherein the phase differential of two-way sinusoidal signal is 90 °;
Frequency source module described in described pulse-series generator model calling and the second micro-control unit (112), continuous print sinusoidal signal is blocked as pulse signal by described pulse-series generator module under the control of described second micro-control unit (112);
Pulse-series generator module described in described Pulse Power Magnification model calling and the second micro-control unit (112), described Pulse Power Magnification module is used for the power output impedance of described pulse-series generator module being matched to 50 Ω and amplified pulse sequence, and the open and close of the power amplification of pulse train in described Pulse Power Magnification module are controlled by described second micro-control unit (112);
Described circuit state modular converter connects described Pulse Power Magnification module and the second micro-control unit (112), described circuit state modular converter, under the control of described second micro-control unit (112), realizes the conversion receiving NMR signal and launch these two kinds of circuit states of RF excitation pulses.
2. as claimed in claim 1 based on the nuclear magnetic resonance chip radio frequency transmission channel of micro-control unit, it is characterized in that, described frequency source module comprises a DDS module (102), 2nd DDS module (103), 3rd DDS module (105), first active crystal oscillator module (104) and the second active crystal oscillator module (106), a described DDS module (102), 2nd DDS module (103) is all connected described first micro-control unit (101) with the 3rd DDS module (105), described first active crystal oscillator module (104) connects a described DDS module (102) and the 2nd DDS module (103), described second active crystal oscillator module (106) connects described 3rd DDS module (105), a described DDS module (102), 2nd DDS module (103) and the 3rd DDS module (105) produce the controlled continuation sinusoidal of frequency respectively under described first micro-control unit (101) controls.
3. as claimed in claim 2 based on the nuclear magnetic resonance chip radio frequency transmission channel of micro-control unit, it is characterized in that, described pulse-series generator module comprises the first analog switch (107), second analog switch (108), 3rd analog switch (109), 4th analog switch (110) and first liang of path multiplexer (111), a described DDS module (102), first analog switch (107) is connected successively with the second analog switch (108), described 2nd DDS module (103), 3rd analog switch (109) is connected successively with the 4th analog switch (110), described second analog switch (108) and the 4th analog switch (110) are all connected described first liang of path multiplexer (111), the continuation sinusoidal that a described DDS module (102) exports is cut to the first pulse signal by described first analog switch (107) and the second analog switch (108), described 3rd analog switch (109), the continuation sinusoidal that described 2nd DDS module (103) exports is cut to the second pulse signal by the 4th analog switch (110), described first liang of path multiplexer (111) is for switching described first pulse signal and the second pulse signal.
4. as claimed in claim 3 based on the nuclear magnetic resonance chip radio frequency transmission channel of micro-control unit, it is characterized in that, described Pulse Power Magnification module comprises impact damper (113), power amplifier (114) and the first level amplification module (115), described impact damper (113) connects described first liang of path multiplexer (111), described power amplifier (114) connects described impact damper (113), and described first level amplification module (115) connects described second micro-control unit (112) and power amplifier (114); The output impedance of described first liang of path multiplexer (111) is matched to measuring resistance by described impact damper (113); Described power amplifier (114) amplifies low powder pulsed sequence power, and excited sample produces NMR signal; After the control level of described second micro-control unit (112) is amplified by described first level amplification module (115), as the power supply of described power amplifier (114).
5. as claimed in claim 4 based on the nuclear magnetic resonance chip radio frequency transmission channel of micro-control unit, it is characterized in that, described circuit state modular converter comprises second liang of path multiplexer (121), 3rd liang of path multiplexer (122), normal impedance (123), second electrical level amplification module (116), three level amplification module (117), 4th level amplification module (118), 5th level amplification module (119) and the 6th level amplification module (120), described second liang of path multiplexer (121) connects described power amplifier (114), described 3rd liang of path multiplexer (122) connects described second liang of path multiplexer (121), described normal impedance (123) ground connection also connects described 3rd liang of path multiplexer (122), described second electrical level amplification module (116), three level amplification module (117), the 4th level amplification module (118), the 5th level amplification module (119) are all connected described second micro-control unit (112) with the 6th level amplification module (120)
Described second electrical level amplification module (116), three level amplification module (117) and the 4th level amplification module (118) are all connected described second liang of path multiplexer (121),
Described second electrical level amplification module (116), the 5th level amplification module (119) and the 6th level amplification module (120) are all connected described 3rd liang of path multiplexer (122),
Described second electrical level amplification module (116), three level amplification module (117), the 4th level amplification module (118), the 5th level amplification module (119) and the 6th level amplification module (120) amplify the port level of described second micro-control unit, described second liang of path multiplexer (121) switches conductive channel under the control of described second micro-control unit (112), and described 3rd liang of path multiplexer (122) increases the isolation between transmission channel and receiving cable.
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| CN113541220A (en) * | 2020-04-21 | 2021-10-22 | 圣邦微电子（北京）股份有限公司 | Load detection circuit and charging system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1603856A (en) * | 2004-11-15 | 2005-04-06 | 华东师范大学 | Signal detection method for nuclear magnetic resonance |
| CN101413994A (en) * | 2008-11-28 | 2009-04-22 | 中国科学院武汉物理与数学研究所 | Signal receiving and transmitting device of digital magnetic nuclear resonance lock |
| CN101726712A (en) * | 2009-11-20 | 2010-06-09 | 中国科学院武汉物理与数学研究所 | Radio frequency signal generating device |
| RU2417746C1 (en) * | 2010-02-01 | 2011-05-10 | Общество с ограниченной ответственностью "С.П.ГЕЛПИК" | Radio-frequency transmitter-receiver to magnetic resonance scanner for orthopaedic magnetic tomograph |
| CN102724162A (en) * | 2012-06-25 | 2012-10-10 | 中国科学院武汉物理与数学研究所 | Multi-channel nuclear magnetic resonance radio frequency signal transmitter |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4329922A1 (en) * | 1993-09-04 | 1995-03-09 | Philips Patentverwaltung | MR imaging method and arrangement for carrying out the method |
| US7573267B1 (en) * | 2008-01-19 | 2009-08-11 | General Electric Company | System and method for active MR tracking |
| US8217651B2 (en) * | 2009-10-30 | 2012-07-10 | General Electric Company | Amplified radiation damping for MR imaging and spectroscopy |
-
2013
- 2013-08-26 CN CN201310377587.3A patent/CN103424725B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1603856A (en) * | 2004-11-15 | 2005-04-06 | 华东师范大学 | Signal detection method for nuclear magnetic resonance |
| CN101413994A (en) * | 2008-11-28 | 2009-04-22 | 中国科学院武汉物理与数学研究所 | Signal receiving and transmitting device of digital magnetic nuclear resonance lock |
| CN101726712A (en) * | 2009-11-20 | 2010-06-09 | 中国科学院武汉物理与数学研究所 | Radio frequency signal generating device |
| RU2417746C1 (en) * | 2010-02-01 | 2011-05-10 | Общество с ограниченной ответственностью "С.П.ГЕЛПИК" | Radio-frequency transmitter-receiver to magnetic resonance scanner for orthopaedic magnetic tomograph |
| CN102724162A (en) * | 2012-06-25 | 2012-10-10 | 中国科学院武汉物理与数学研究所 | Multi-channel nuclear magnetic resonance radio frequency signal transmitter |
Non-Patent Citations (1)
| Title |
|---|
| 磁共振射频电路设计;徐俊成;《中国优秀硕士学位论文全文数据库 基础科学辑》;20130115;第1-46页 * |
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