Triple-tuning radio frequency coil transmitting and receiving system and nuclear magnetic resonance imaging equipment

Abstract

The invention discloses a triple-tuning radio frequency coil transmitting and receiving system and nuclear magnetic resonance imaging equipment, and the system comprises a coil circuit, a first transmitting and receiving link, a second transmitting and receiving link, and a first signal filter. The first signal filter comprises a first filter and a second filter; passband ranges of the first filter and the second filter do not coincide; the first end of the first filter and the first end of the second filter are electrically connected with the coil circuit; the second end of the first filter is electrically connected with the first transceiving link; the second end of the second filter is electrically connected with the second transceiving link; the first transceiving link is used for transmitting and receiving a first nuclide signal; the second transceiving link is used for transmitting and receiving a second nuclide signal and a third nuclide signal; the coil circuit is used for generating relaxation signals of the first nuclide, the second nuclide and the third nuclide. According to the technical scheme, electromagnetic interference between different nuclides can be avoided, and the coupling problem between the nuclides is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear magnetic resonance imaging, and in particular to a three-tuned radio frequency coil transceiver system and a nuclear magnetic resonance imaging device. Background Art

[0002] Multi-nuclear magnetic resonance imaging (MRI) and magnetic resonance scanning (MRS) can provide biochemical, physical, functional and structural information, and have been proven to be useful tools for comprehensively describing tumor pathological characteristics and monitoring tumor treatment response. In high-magnetic field MR imaging applications, the design challenge of developing multi-nuclear radio frequency coils mainly comes from the increased electromagnetic coupling between different nuclear channels. Insufficient isolation between nuclear channels can lead to degraded excitation and acquisition performance, especially in heteronuclear magnetic resonance experiments. Therefore, the key design goal of multi-harmonic coils is to minimize coupling between nuclides and channels to improve X-nuclear detection sensitivity and emission field uniformity, while maintaining proton sensitivity and uniformity. Therefore, the interaction and interference between each individually tuned coil element must be suppressed.

[0003] At present, there are two main types of schemes for realizing multi-resonance of coils in the design of multi-core RF coils, namely, single structure independent resonance and combined structure. A single structure is mainly an independent coil unit to realize multiple resonant frequencies or to realize multiple resonant frequencies by frequency switching. The structure based on two or more independent physical coils is usually used to realize multi-nuclide resonance. The schemes mainly include geometric decoupling structure and nested combination.

[0004] However, while a single structure can be easily extended to a multi-channel array design, the realization of three resonances is to first use a dual tuning and matching circuit, that is, by adding a frequency trap circuit and a frequency conversion circuit to each coil loop, the coil unit first generates two resonances, and then the third frequency resonance is achieved through an active tuning conversion circuit. However, due to the loss caused by the insertion of the trap element and the frequency conversion circuit, the quality and signal-to-noise ratio of the coil are reduced. The four-ring birdcage method is to add two additional end ring blocks on both sides of the traditional birdcage coil structure. The coil can be tuned at different frequencies, and the frequencies mainly come from the external structure and the internal structure. In order to maintain the signal-to-noise of the four-ring birdcage coil, the length ratio needs to be optimized, which usually leads to a significant increase in the length of the entire coil. The additional length requirement of the outer end ring limits the accessible space, which may be a problem in applications using smaller coils. In addition, it is quite difficult to expand the multi-structure, single-channel coil structure to a multi-channel array design, and the coil needs to be exchanged during measurement. In designs using nested coils, the coupling of two or three coil systems needs to be handled to reduce the impact on the quality of the signal. This coupling can be controlled by modifying the distance or arrangement between multiple coils and between each channel within a coil, thus avoiding performance degradation. However, the ability to control coupling by adjusting the distance between the inner and outer coils may be limited by space. Most simultaneous protocols are limited to dual-nuclides acquisition or independent imaging of nuclides using separate coils. Summary of the invention

[0005] The present invention provides a three-tuned radio frequency coil transceiver system and a nuclear magnetic resonance imaging device to solve the problems existing in the prior art, avoid electromagnetic interference between different nuclides, and solve the coupling problem between nuclides.

[0006] In a first aspect, the present invention provides a triple-tuned radio frequency coil transceiver system, comprising: a coil circuit, a first transceiver link, a second transceiver link, and a first signal filter;

[0007] The first signal filter includes a first filter and a second filter; the passband ranges of the first filter and the second filter do not overlap;

[0008] The first end of the first filter and the first end of the second filter are both electrically connected to the coil circuit; the second end of the first filter is electrically connected to the first transceiver link; the second end of the second filter is electrically connected to the second transceiver link;

[0009] The first transceiver link is used to transmit and receive a first nuclear species signal; the second transceiver link is used to transmit and receive a second nuclear species signal and a third nuclear species signal;

[0010] The coil circuit is used to generate relaxation signals of the first nuclear species, the second nuclear species, and the third nuclear species.

[0011] Optionally, the coil circuit is a ring structure;

[0012] The coil circuit includes two first structures for tuning and matching the relaxation signal of the first nuclear species, and two second structures for tuning and matching the second nuclear species and the third nuclear species;

[0013] Each of the first structures and each of the second structures are connected in parallel to form a tuning and matching unit; and two of the tuning and matching units are symmetrically arranged in the coil circuit.

[0014] Optionally, the first structure includes a first capacitor and a first inductor connected in series.

[0015] Optionally, the second structure includes a second capacitor.

[0016] Optionally, the three-tuned RF coil transceiver system further includes a matching circuit;

[0017] The first end of the first filter and the first end of the second filter are electrically connected to the coil circuit through the matching circuit;

[0018] The matching circuit is located in the middle of the first structure and the second structure.

[0019] Optionally, the first transceiver link includes a first transmission / reception switch; the first transmission / reception switch includes a first transmission input terminal, a first reception output terminal and a first common terminal;

[0020] The first transmitting input terminal is used to connect to a first transmitting device; the first receiving output terminal is used to connect to a first receiving device; the first common terminal is connected to the second end of the first filter; wherein the first transmitting device is used to transmit a signal of a first frequency; and the first receiving device is used to receive a signal of the first frequency.

[0021] Optionally, the second transceiver link includes a second transmission / reception switch; the second transmission / reception switch includes a second transmission input terminal, a second reception output terminal and a second common terminal;

[0022] The second transmitting input terminal is used to connect to a second transmitting device; the second receiving output terminal is used to connect to a second receiving device and a third receiving device; the second common terminal is connected to the second end of the second filter; wherein the second transmitting device is used to transmit a signal of a second frequency; the second receiving device is used to receive a signal of a third frequency; and the third receiving device is used to receive a signal of a fourth frequency.

[0023] Optionally, the three-tuned RF coil transceiver system is characterized by further comprising a second signal filter; the second signal filter comprises a third filter and a fourth filter;

[0024] The second receiving device is connected to the second receiving output terminal through the third filter; the third receiving device is connected to the second receiving output terminal through the fourth filter; and the passband ranges of the third filter and the fourth filter do not overlap.

[0025] Optionally, the first nuclear species signal is the nuclear species signal of 23Na.

[0026] Optionally, the second nuclear species signal and the third nuclear species signal are respectively a 1H nuclear species signal and a 9F nuclear species signal.

[0027] In a second aspect, the present invention provides a nuclear magnetic resonance imaging device, characterized in that it includes any of the three-tuned radio frequency coil transceiver systems described above.

[0028] The technical solution of the present invention is to make the first signal filter of the three-tuned radio frequency coil transceiver system include a first filter and a second filter whose passband ranges do not overlap, and the first end of the first filter and the first end of the second filter are both electrically connected to the coil circuit, and the second end of the first filter is electrically connected to the first transceiver link, and the second end of the second filter is electrically connected to the second transceiver link, the first transceiver link is used to transmit and receive the first nuclear species signal, the second transceiver link is used to transmit and receive the second nuclear species signal and the third nuclear species signal, and the coil circuit is used to generate relaxation signals of the first nuclear species, the second nuclear species and the third nuclear species. In this way, it is possible to simultaneously generate signals of the three nuclear species through a single physical loop structure, and cooperate with the radio frequency front-end components so that three-nuclear magnetic resonance imaging can be achieved without frequency switching, thereby avoiding electromagnetic interference between different nuclear species and solving the coupling problem between nuclear species.

[0029] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1A schematic diagram of the structure of a three-tuned radio frequency coil transceiver system provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0033] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

[0034] Figure 1 This is a schematic diagram of the structure of a three-tuned RF coil transceiver system provided in an embodiment of the present invention. This embodiment provides a three-tuned RF coil transceiver system, referring to Figure 1 As shown, the three-tuned RF coil transceiver system includes a coil circuit 10, a first transceiver link 20, a second transceiver link 30 and a first signal filter 40; the first signal filter 40 includes a first filter 41 and a second filter 42; the first end of the first filter 41 and the first end of the second filter 42 are both electrically connected to the coil circuit 10; the second end of the first filter 41 is electrically connected to the first transceiver link 20; the second end of the second filter 42 is electrically connected to the second transceiver link 30; the first transceiver link 20 is used to transmit and receive a first nuclear species signal; the second transceiver link 30 is used to transmit and receive a second nuclear species signal and a third nuclear species signal; the coil circuit 10 is used to generate relaxation signals of the first nuclear species, the second nuclear species and the third nuclear species.

[0035] Among them, the first nuclear species signal can be understood as a radio frequency signal that can excite the relaxation signal of the first type of nuclear species. The second nuclear species signal can be understood as a radio frequency signal that can excite the relaxation signal of the second type of nuclear species. The third nuclear species signal can be understood as a radio frequency signal that can excite the relaxation signal of the third type of nuclear species.

[0036] The passband ranges of the first filter 41 and the second filter 42 do not overlap, the passband range of the first filter 41 includes the frequency of the first nuclide signal, and the passband range of the second filter 42 includes the frequencies of the second nuclide signal and the third nuclide signal, so as to achieve efficient separation of the first nuclide signal from the second nuclide signal and the third nuclide signal. In an exemplary embodiment, the first filter 41 is a low-pass filter, and the second filter 42 is a high-pass filter.

[0037] It should be noted that the frequency offset between the second nuclear species signal and the third nuclear species signal is small, so that the second nuclear species and the third nuclear species can share the second transceiver link 30 .

[0038] The coil circuit 10 may be provided with capacitors and / or inductors to generate the resonant frequencies of the relaxation signals of the first nuclear species, the second nuclear species, and the third nuclear species. In an optional embodiment, the coil circuit 10 is a single physical loop structure, so that the resonant frequencies of the relaxation signals of the first nuclear species, the second nuclear species, and the third nuclear species can be generated simultaneously in the single physical loop structure, thereby solving the electromagnetic interference problem between the three nuclear species.

[0039] The first transceiver link 20 is electrically connected to the coil circuit 10 through the first filter 41, and is used to provide a first drive signal to the coil circuit 10, so that the coil circuit 10 receives the relaxation signal of the first nuclear species and outputs it to the first transceiver link 20. Similarly, the second transceiver link 30 is electrically connected to the coil circuit 10 through the second filter 42, and is used to provide a second drive signal to the coil circuit 10, so that the coil circuit 10 receives the relaxation signal of the second nuclear species and the third nuclear species and outputs it to the second transceiver link 30, so that the electromagnetic interference between the second nuclear species signal and the third nuclear species signal can be eliminated.

[0040] In this embodiment, the first signal filter of the three-tuned RF coil transceiver system includes a first filter and a second filter whose passband ranges do not overlap, and the first end of the first filter and the first end of the second filter are both electrically connected to the coil circuit, and the second end of the first filter is electrically connected to the first transceiver link, and the second end of the second filter is electrically connected to the second transceiver link, the first transceiver link is used to transmit and receive the first nuclear species signal, the second transceiver link is used to transmit and receive the second nuclear species signal and the third nuclear species signal, and the coil circuit is used to generate relaxation signals of the first nuclear species, the second nuclear species and the third nuclear species. In this way, it is possible to simultaneously generate signals of the three nuclear species through a single physical loop structure, and cooperate with the RF front-end components so that three-nuclear magnetic resonance imaging can be achieved without frequency switching, thereby avoiding electromagnetic interference between different nuclear species and solving the coupling problem between nuclear species.

[0041] Optional, continue to refer to Figure 1As shown, the coil circuit 10 is a ring structure; the coil circuit 10 includes two first structures 11 for tuning and matching the relaxation signal of the first nuclear species, and two second structures 12 for tuning and matching the second nuclear species and the third nuclear species; each first structure 11 and each second structure 12 are connected in parallel to form a tuning and matching unit; the two tuning and matching units are symmetrically arranged in the coil circuit 10.

[0042] The annular structure may include, but is not limited to, a circular structure or a rectangular structure. Figure 1 The case where the annular structure is a rectangular structure is only exemplified, and the shape of the annular structure is not limited. By setting the coil circuit 10 to a ring structure, the signal-to-noise ratio of the relaxation signals of the three nuclides collected can be improved, thereby improving the imaging quality of the three-tuned magnetic resonance imaging system.

[0043] The first structure 11 is used to tune and match the relaxation signal of the first nuclear species. In an optional embodiment, the first structure 11 includes a first capacitor C1 and a first inductor L1 connected in series. The second structure 12 is used to tune and match the relaxation signals of the second nuclear species and the third nuclear species. In an optional embodiment, the second structure 12 includes a second capacitor C2.

[0044] Each first structure 11 and each second structure 12 are connected in parallel to form a tuning and matching unit, and the two tuning and matching units are symmetrically arranged in the coil circuit 10 to reduce electromagnetic interference between components in each tuning and matching unit, thereby reducing electromagnetic interference between the three nuclides.

[0045] Optional, continue to refer to Figure 1 As shown, the three-tuned RF coil transceiver system also includes a matching circuit 50; the first end of the first filter 41 and the first end of the second filter 42 are electrically connected to the coil circuit 10 through the matching circuit 50; the matching circuit 50 is located in the middle position of the first structure 11 and the second structure 12.

[0046] The matching circuit 50 is a three-tuned matching circuit 50 of the first nuclear species, the second nuclear species and the third nuclear species, so that the first nuclear species, the second nuclear species and the third nuclear species can be imaged simultaneously, thereby solving the electromagnetic interference problem among the three nuclear species.

[0047] Optional, continue to refer to Figure 1 As shown, the first transceiver link 20 includes a first transmission / reception switch 21; the first transmission / reception switch 21 includes a first transmission input terminal a, a first reception output terminal b and a first common terminal c; the first transmission input terminal a is used to connect to the first transmission device; the first reception output terminal b is used to connect to the first reception device; the first common terminal c is connected to the second end of the first filter 41.

[0048] The first transmitting device is used to transmit a signal of a first frequency, and the first receiving device is used to receive a signal of a first frequency. The signal of the first frequency can be understood as a radio frequency signal used to tune and match the first nuclide.

[0049] Specifically, the first transmitting input terminal a of the first transmission / receiving switch 21 is connected to the first transmitting device, the first common terminal c is connected to the second terminal of the first filter 41, and the first terminal of the first filter 41 is connected to the coil circuit 10, so that the first frequency signal transmitted by the first transmitting device can be transmitted to the coil circuit 10, so that the coil circuit 10 generates a relaxation signal of the first nuclear species. At the same time, the first receiving output terminal b is connected to the first receiving device, and the first receiving device is used to receive the signal of the first frequency, so that the relaxation signal of the first nuclear species generated by the coil circuit 10 can be received by the first receiving device.

[0050] In an optional embodiment, the first receiving output terminal b is connected to the first receiving device through a first low-noise power amplifier 22, so that no additional noise is introduced while amplifying the first frequency signal output by the first receiving output terminal b, which is beneficial to reducing the signal-to-noise ratio.

[0051] Optional, continue to refer to Figure 1 As shown, the second transceiver link 30 includes a second transmit / receive switch 31; the second transmit / receive switch 31 includes a second transmit input terminal d, a second receive output terminal e and a second common terminal f; the second transmit input terminal d is used to connect to the second transmitting device; the second receive output terminal e is used to connect to the second receiving device and the third receiving device; the second common terminal f is connected to the second end of the second filter 42.

[0052] The second transmitting device is used to transmit a signal of a second frequency; the second receiving device is used to receive a signal of a third frequency; and the third receiving device is used to receive a signal of a fourth frequency. The signal of the second frequency can be understood as a radio frequency signal used to tune and match the second nuclide and the third nuclide. The third frequency signal is a radio frequency signal used to tune and match the second nuclide. The fourth frequency signal is a radio frequency signal used to tune and match the third nuclide.

[0053] In an optional embodiment, the three-tuned RF coil transceiver system also includes a second signal filter 60; the second signal filter 60 includes a third filter 61 and a fourth filter 62; the second receiving device is connected to the second receiving output terminal e through the third filter 61; the third receiving device is connected to the second receiving output terminal e through the fourth filter 62.

[0054] The passband ranges of the third filter 61 and the fourth filter 62 do not overlap, the passband range of the third filter 61 includes the frequency of the second nuclide signal, and the passband range of the fourth filter 62 includes the frequency of the third nuclide signal, so as to achieve efficient separation of the second nuclide signal and the third nuclide signal. In an exemplary embodiment, the third filter 61 is a low-pass filter, and the fourth filter 62 is a high-pass filter.

[0055] Specifically, the second transmitting input terminal d of the second transmission / receiving switch 31 is connected to the second transmitting device, the second common terminal f is connected to the second terminal of the second filter 42, and the first terminal of the second filter 42 is connected to the coil circuit 10, so that the second frequency signal transmitted by the second transmitting device can be transmitted to the coil circuit 10, so that the coil circuit 10 generates relaxation signals of the second and third nuclear species, and outputs the second frequency signal carrying the relaxation signals of the second and third nuclear species through the second receiving output terminal e. At the same time, the second receiving output terminal e is connected to the second receiving device through the third filter 61, and is connected to the third receiving device through the fourth filter 62, and the second receiving device is used to receive the third frequency signal, and the third receiving device is used to receive the fourth frequency signal, so that the relaxation signals of the second and third nuclear species generated by the coil circuit 10 can be received by the second receiving device and the third receiving device respectively.

[0056] In an optional embodiment, the second receiving output terminal e is connected to the second receiving device and the third receiving device through a second low-noise power amplifier 32, so that the second frequency signal output by the second receiving output terminal e is amplified without introducing additional noise, which is beneficial to reducing the signal-to-noise ratio.

[0057] Optionally, the first nuclide signal is a nuclide signal of 23Na, and the second nuclide signal and the third nuclide signal are a nuclide signal of 1H and a nuclide signal of 9F, respectively.

[0058] Optionally, since the frequency of 1H is 128.2 MHz and the frequency of 19F is 120.6 MHz, the frequency offset of 1H and 19F is small, and by making the second frequency signal 124.4 MHz, the second transceiver link 30 can work normally at the frequency of 1H and the frequency of 19F. By making the third frequency signal 128.2 MHz and the fourth frequency signal 120.6 MHz, the frequency of 1H and the frequency of 19F can be received respectively, thereby improving the reception performance of the frequency of 1H and the frequency of 19F.

[0059] Since proton magnetic resonance imaging (1H MRI) is widely used to provide anatomical information with high spatial resolution and soft tissue resolution. Using high-performance fluorine nanoprobes, fluorine magnetic resonance imaging (19F MRI) can be used for cancer diagnosis because of its excellent soft tissue resolution and inherent high natural abundance. Sodium magnetic resonance imaging (23Na-MRI) provides the possibility of non-invasive quantification of tissue sodium concentration, which has the potential to provide information about tumor cellularity and changes in tumor microstructure after treatment. Multiple molecular events interact at different levels such as molecular, metabolic and ionic levels, leading to the generation of abnormal biological behaviors such as unlimited tumor proliferation, angiogenesis, anti-apoptosis and easy invasion and metastasis. Therefore, the simultaneous application of the above technologies can simultaneously obtain biological information at different levels such as tumor molecular targets, energy metabolism, ion perturbations and structural functions, which is of great significance to tumor research.

[0060] Based on the same inventive concept, this embodiment also provides a nuclear magnetic resonance imaging device. Since the nuclear magnetic resonance imaging device includes the nuclear magnetic resonance imaging device provided by any of the above embodiments, it can have the corresponding structure and characteristics of the nuclear magnetic resonance imaging device provided by the embodiment of the present invention, and can achieve the beneficial effects of the nuclear magnetic resonance imaging device provided by the embodiment of the present invention. The similarities can be referred to the above description.

[0061] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A three-tuned radio frequency coil transceiver system, characterized in that: include: A coil circuit, a first transceiver link, a second transceiver link, and a first signal filter; The first signal filter includes a first filter and a second filter; The passband ranges of the first filter and the second filter do not overlap; The first end of the first filter and the first end of the second filter are both electrically connected to the coil circuit; the second end of the first filter is electrically connected to the first transceiver link; the second end of the second filter is electrically connected to the second transceiver link; The first transceiver link is used to transmit and receive a first nuclear species signal; the second transceiver link is used to transmit and receive a second nuclear species signal and a third nuclear species signal; The coil circuit is used to generate relaxation signals of the first nuclear species, the second nuclear species, and the third nuclear species.

2. The three-tuned RF coil transceiver system according to claim 1, characterized in that: The coil circuit is a ring structure; The coil circuit includes two first structures for tuning and matching the relaxation signal of the first nuclear species, and two second structures for tuning and matching the second nuclear species and the third nuclear species; Each of the first structures and each of the second structures are connected in parallel to form a tuning and matching unit; The two tuning and matching units are symmetrically arranged in the coil circuit.

3. The three-tuned RF coil transceiver system according to claim 2, characterized in that: The first structure includes a first capacitor and a first inductor connected in series.

4. The three-tuned RF coil transceiver system according to claim 2, characterized in that: The second structure includes a second capacitor.

5. The three-tuned RF coil transceiver system according to claim 2, characterized in that: Also includes a matching circuit; The first end of the first filter and the first end of the second filter are electrically connected to the coil circuit through the matching circuit; The matching circuit is located in the middle of the first structure and the second structure.

6. The three-tuned RF coil transceiver system according to claim 1, characterized in that: The first transceiver link includes a first transmit / receive switch; the first transmit / receive switch includes a first transmit input terminal, a first receive output terminal and a first common terminal; The first transmitting input terminal is used to connect to a first transmitting device; the first receiving output terminal is used to connect to a first receiving device; the first common terminal is connected to the second end of the first filter; wherein the first transmitting device is used to transmit a signal of a first frequency; and the first receiving device is used to receive a signal of the first frequency.

7. The three-tuned RF coil transceiver system according to claim 1, characterized in that: The second transceiver link includes a second transmit / receive switch; the second transmit / receive switch includes a second transmit input terminal, a second receive output terminal, and a second common terminal; The second transmitting input terminal is used to connect to the second transmitting device; the second receiving output terminal is used to connect to the second receiving device and the third receiving device; the second common terminal is connected to the second end of the second filter; wherein the second transmitting device is used to transmit a signal of a second frequency; the second receiving device is used to receive a signal of a third frequency; and the third receiving device is used to receive a signal of a fourth frequency.

8. The three-tuned RF coil transceiver system according to claim 7, characterized in that: Also includes a second signal filter; the second signal filter includes a third filter and a fourth filter; The second receiving device is connected to the second receiving output terminal through the third filter; the third receiving device is connected to the second receiving output terminal through the fourth filter; and the passband ranges of the third filter and the fourth filter do not overlap.

9. The three-tuned RF coil transceiver system according to claim 1, characterized in that: The first nuclide signal is the nuclide signal of 23Na.

10. The three-tuned radio frequency coil transceiver system according to claim 1, characterized in that: The second nuclear species signal and the third nuclear species signal are respectively a 1H nuclear species signal and a 9F nuclear species signal.

11. A nuclear magnetic resonance imaging device, characterized in that: A three-tuned radio frequency coil transceiver system comprising any one of claims 1-10.

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