Multinuclear magnetic resonance coil device and magnetic resonance system for small animals

Abstract

This application relates to the field of magnetic resonance technology, and in particular to a multinucleus magnetic resonance coil device and magnetic resonance system for small animals. The multinucleus magnetic resonance coil device includes: a first coil group, comprising a first saddle-shaped coil and a first solenoid coil extending on a first cylindrical surface, wherein the resonant frequencies of the first saddle-shaped coil and the first solenoid coil correspond to a first atomic nucleus; a second coil group, comprising a second saddle-shaped coil and a second solenoid coil extending on a second cylindrical surface, wherein the resonant frequencies of the second saddle-shaped coil and the second solenoid coil correspond to a second atomic nucleus different from the first atomic nucleus, and the second cylindrical surface is coaxially located on the inner circumferential side of the first cylindrical surface; and an examination cavity, disposed on the inner circumferential side of the second cylindrical surface, for accommodating the small animal.

Description

Technical Field

[0001] This application relates to the field of nuclear magnetic resonance technology, and more particularly to a multinuclear magnetic resonance coil device and magnetic resonance system for small animals. Background Technology

[0002] With the development of magnetic resonance imaging (MRI) technology, multi-core MRI / MRS applications are gradually emerging. Multi-core applications require the support of corresponding dual-frequency (or more) coils, which are often integrated transceiver coils. Taking a dual-frequency coil as an example, the coil needs to have four functions: 1H core transmission, 1H core reception, X core (hybrid core) transmission, and X core reception. These four functions can be accomplished by at least one coil (shared by both dual-frequency transceivers), or up to four independent coils, each coil performing one of the functions.

[0003] When using a multi-coil scheme, there are various placement methods and coil forms depending on the space and shape of the coils. Firstly, in terms of spatial placement, they can be placed on the same layer or in layers. Secondly, in terms of coil form, they can be birdcage coils, multi-channel array coils, orthogonal multi-channel coils, or even dipole coils and TEM wave coils, etc.

[0004] Regardless of the design approach, the general principle is to prioritize the performance of the hybrid nucleus, especially its receiving signal-to-noise ratio (SNR). Taking a dual-frequency coil as an example, the most classic and commonly used design is a dual-frequency transmit / receive shared coil. If the coil configuration resembles a birdcage, then it's a dual-frequency birdcage transmit / receive shared coil. If a dual (or multi) coil scheme is used, the dual (or multi) coils can be arranged on the same layer and staggered; or, to optimize the receiving SNR of the hybrid nucleus, a layered arrangement can be used, placing the receiving (hybrid nucleus X) in the innermost layer and the transmitting (and) 1H coil in the outermost layer. Summary of the Invention

[0005] Because small animal models are simple and inexpensive, they are commonly used in magnetic resonance imaging (MRI) experiments, and multi-core coils made from small animals also have corresponding scientific research value. However, in coil design and experimentation, it has been found that due to the small size of the coils, debugging dual-frequency birdcage coils is actually very difficult, as there is not enough space to place the corresponding frequency conversion components. Therefore, multi-coil design is a relatively feasible solution. However, the functional division and spatial arrangement of multi-coil coils face choices. Traditional thinking would refer to human body coils, placing the coil aperture along the direction of the main magnetic field (head-to-toe direction), and placing the 1H core coil and X core coil along the coil aperture respectively, while designing the coil in the form of a birdcage or a multi-channel phased array unit.

[0006] However, experimental results show that for low-frequency, low-signal X nuclides, the above two forms are not the most efficient (signal-to-noise ratio) design methods. Conversely, the inventors discovered that by utilizing the short body length of small animals (significantly smaller than the diameter of the magnetic resonance system's cavity), placing the animal laterally (i.e., aligning the animal's head and feet with the X-axis of the magnetic resonance system), and designing the coils in a loop+saddle dual-unit orthogonal configuration, excellent signal-to-noise ratio and good uniformity are achieved. Based on this, this application proposes a multi-nucleus magnetic resonance coil device and magnetic resonance system for small animals.

[0007] In the first aspect, a multinuclear magnetic resonance coil device for small animals is proposed, comprising:

[0008] The first coil group includes a first saddle-shaped coil and a first solenoid coil extending on a first cylindrical surface, wherein the resonant frequencies of the first saddle-shaped coil and the first solenoid coil correspond to the first atomic nucleus;

[0009] The second coil group includes a second saddle-shaped coil and a second solenoid coil extending on the second cylindrical surface. The resonant frequencies of the second saddle-shaped coil and the second solenoid coil correspond to a second atomic nucleus that is different from the first atomic nucleus. The second cylindrical surface is coaxially located on the inner circumference of the first cylindrical surface.

[0010] An inspection cavity, located on the inner circumferential side of the second cylindrical surface, is used to accommodate the small animal.

[0011] In some possible implementations, the first saddle-shaped coil is formed into a first figure-eight shape, wherein the two loops of the first figure-eight shape are arranged along the first diameter direction of the first cylindrical surface and extend around the first diameter direction;

[0012] The second saddle-shaped coil is formed into a second figure-eight shape, wherein the two loops of the second figure-eight shape are arranged along the second diameter direction of the second cylindrical surface and extend around the second diameter direction.

[0013] In some possible implementations, the first diameter direction and the second diameter direction are the same.

[0014] In some possible implementations, the first solenoid coil is formed into a third figure-eight shape, the two loops of the third figure-eight shape being arranged along the axial direction of the first cylindrical surface and extending around the axial direction of the first cylindrical surface, the intersection of the third figure-eight shape and the intersection of the first figure-eight shape being respectively disposed on opposite sides of the third diameter direction of the first cylinder, the third diameter direction being perpendicular to the first straight line direction;

[0015] The second solenoid coil is formed into a fourth figure-eight shape, the two loops of the fourth figure-eight shape are arranged along the axial direction of the second cylindrical surface and extend around the axial direction of the second cylindrical surface. The intersection of the fourth figure-eight shape and the intersection of the second figure-eight shape are respectively arranged on opposite sides of the fourth diameter direction of the second cylinder, and the fourth diameter direction is perpendicular to the second diameter direction.

[0016] In some possible implementations, the first atomic nucleus is a hydrogen atomic nucleus, and the first saddle-shaped coil, the first solenoid coil, the second saddle-shaped coil, and the second solenoid coil are all transceiver coils.

[0017] In some possible implementations, two of each of the first saddle-shaped coil and the first solenoid coil are provided, and two of each of the second saddle-shaped coil and the second solenoid coil are provided;

[0018] Along the axial direction of the first cylindrical surface, the two first saddle-shaped coils partially overlap.

[0019] Along the axial direction of the second cylindrical surface, the two second saddle-shaped coils partially overlap.

[0020] In some possible implementations, a first support cylinder and a second support cylinder coaxially disposed within the first support cylinder are also included. The outer peripheral surface of the first support cylinder forms the first cylindrical surface, and the outer peripheral surface of the second support cylinder forms the second cylindrical surface. The first support cylinder supports the first coil group, and the second support cylinder supports the second coil group.

[0021] In some possible implementations, the first coil and the second coil also have a resonant frequency corresponding to the second atomic nucleus;

[0022] Preferably, the first atomic nucleus is a hydrogen nucleus.

[0023] Secondly, a magnetic resonance system is proposed, comprising:

[0024] The main magnet has an inspection space, within which a main magnetic field is generated;

[0025] The multi-core magnetic resonance coil device as described in the first aspect;

[0026] The direction of the main magnetic field is perpendicular to the axial direction of the first cylindrical surface.

[0027] In some possible implementations, it also includes:

[0028] The first 3dB hybrid power divider has a first port connected to a magnetic resonance transmitter via a first switch, a second port connected to a magnetic resonance receiver via a second switch, a third port connected to the first saddle coil, and a fourth port connected to the first solenoid coil.

[0029] A first matching resistor of 50 ohms is coupled to the first port when the first switch is in the off state that decouples the first port from the magnetic resonance transmitter.

[0030] A second matching resistor of 50 ohms is coupled to the second port when the second switch is in the off state that decouples the second port from the magnetic resonance receiver;

[0031] The second 3dB Hybrid power divider has a fifth port connected to a magnetic resonance transmitter via a third switch, a sixth port connected to a magnetic resonance receiver via a fourth switch, a seventh port connected to the first saddle coil, and an eighth port connected to the first solenoid coil.

[0032] A third matching resistor of 50 ohms is coupled to the fifth port when the second switch is in the off state that decouples the fifth port from the magnetic resonance transmitter;

[0033] A 50-ohm fourth matching resistor is coupled to the sixth port when the fourth switch is in the off state, which decouples the sixth port from the magnetic resonance receiver.

[0034] In some possible implementations, the axial direction of the first cylindrical surface corresponds to the left-right direction of the main magnet. Attached Figure Description

[0035] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this application, and are not intended to limit this application.

[0036] Figure 1 This is a schematic diagram of the magnetic resonance system provided in the embodiments of this application.

[0037] Figure 2 yes Figure 1 The schematic diagram of the coil device is shown in the figure. For clarity, the first support cylinder and the first coil group are drawn with dashed lines.

[0038] Figure 3 yes Figure 2 The diagram shows the structure of the first coil group. For clarity, the first support cylinder is drawn with dashed lines.

[0039] Figure 4 yes Figure 2 The structural schematic diagram of the second coil group is shown in the figure. For clarity, the second support cylinder is drawn with dashed lines.

[0040] Figure 5 This is a circuit block diagram of a part of the magnetic resonance system provided in the embodiments of this application.

[0041] Figure 6 This is a circuit block diagram of a part of the magnetic resonance system provided in the embodiments of this application.

[0042] Figure 7 This is a schematic diagram of the structure of the first coil group provided in another embodiment of this application. For clarity, the first support cylinder is drawn with dashed lines in this diagram.

[0043] Figure 8 This is a schematic diagram of the structure of the second coil group provided in another embodiment of this application. For clarity, the second support cylinder is drawn with dashed lines in this diagram.

[0044] Figure 9 This is a schematic diagram of the structure of a coil device provided in another embodiment of this application. For clarity, the first support cylinder and the first coil group are drawn with dashed lines.

[0045] Figure 10 yes Figure 9 The diagram shows the structure of the first coil group. For clarity, the first support cylinder is drawn with dashed lines.

[0046] Figure 11 yes Figure 9 The structural schematic diagram of the second coil group is shown in the figure. For clarity, the second support cylinder is drawn with dashed lines.

[0047] Explanation of reference numerals in the attached figures:

[0048] 1000-Magnetic Resonance System;

[0049] 100 - Main magnet, 200 - Coil assembly, 300 - Magnetic resonance transmitter, 400 - Magnetic resonance receiver;

[0050] 10 - First coil group, 20 - Second coil group;

[0051] S1 - First cylindrical surface, S2 - Second cylindrical surface;

[0052] D1 - Axial direction of the first cylindrical surface, D2 - Axial direction of the second cylindrical surface, D3 - Magnetic field direction, D4 - Circumferential direction of the first cylindrical surface, D5 - Circumferential direction of the second cylindrical surface, D6 - First diameter direction, D7 - Second diameter direction, D8 - Third diameter direction, D9 - Fourth diameter direction;

[0053] 1-First saddle-shaped coil; 2-First solenoid coil;

[0054] 3-Second saddle-shaped coil; 4-Second solenoid coil;

[0055] 5-First 3dB Hybrid Power Divider;

[0056] 6-Second 3dB Hybrid Power Divider;

[0057] 7-First support cylinder;

[0058] 8-Second support cylinder;

[0059] 9-Check space;

[0060] K1 - First switch, K2 - Second switch, K3 - Third switch, K4 - Fourth switch;

[0061] R1 - First matching resistor, R2 - Second matching resistor, R3 - Third matching resistor, R4 - Fourth matching resistor;

[0062] Q1 - First preamplifier, Q2 - Second preamplifier. Detailed Implementation

[0063] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the described embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. It is understood that, without conflict, some technical means of the various embodiments described herein can be substituted for or combined with each other.

[0064] In the description of this application, the terms "first," "second," etc., are used only to distinguish the described objects and have no sequential or technical meaning. Therefore, objects specified with "first," "second," etc., may explicitly or implicitly include one or more of those objects, and, for example, the term "first element" itself does not imply the existence of a "second element," nor does the term "second element" itself imply the existence of a "first element." Furthermore, words such as "a" or "one" do not indicate a quantity limitation, but rather indicate the presence of at least one, while "multiple" indicates not less than two.

[0065] Figures 1 to 6A magnetic resonance system 1000 according to an embodiment of this application is shown, which includes a main magnet 100, a multinucleus magnetic resonance coil device 200, a magnetic resonance transmitter 300 and a magnetic resonance receiver 400, and can be used for multinucleus magnetic resonance imaging of small animals (e.g., mice).

[0066] A through-hole is formed on the inner circumference of the main magnet 100. This through-hole constitutes an examination space 9 for accommodating the coil device 200 and the small animal to be examined. The main magnet 100 generates a main magnetic field, namely B0 field, in the examination space 9 with the magnetic field direction D3 in the front-back direction.

[0067] The coil device 200 includes a first support cylinder 7, a second support cylinder 8, a first coil group 10, and a second coil group 20.

[0068] The first support cylinder 7 is a component that supports the first coil group 10, and the second support cylinder 8 is a component that supports the second coil group 20. The second support cylinder 8 is coaxially arranged on the inner circumference of the first support cylinder 7, and the two are fixed to each other.

[0069] The first coil group 10 is disposed abutting against the outer peripheral surface of the first support cylinder 7, and includes a first saddle-shaped coil 1 and a first solenoid coil 2 extending from the outer peripheral surface of the first support cylinder 7. The outer peripheral surface of the first support cylinder 7 is a cylindrical surface, referred to as the first cylindrical surface S1 for ease of description. Therefore, the first saddle-shaped coil 1 and the first solenoid coil 2 extend on the first cylindrical surface S1. Furthermore, the resonant frequencies of the first saddle-shaped coil 1 and the first solenoid coil 2 correspond to the resonant frequencies of hydrogen nuclei, that is, the first saddle-shaped coil 1 and the first solenoid coil 2 have resonant frequencies corresponding to the resonant frequencies of hydrogen nuclei.

[0070] The second coil group 20 is disposed abutting against the outer peripheral surface of the second support cylinder 8, and includes a second saddle-shaped coil 3 and a second solenoid coil 4 extending from the outer peripheral surface of the second support cylinder 8. The outer peripheral surface of the second support cylinder 8 is a cylindrical surface, referred to as the second cylindrical surface S2 for ease of description. Therefore, the second saddle-shaped coil 3 and the second solenoid coil 4 extend on the second cylindrical surface S2. The second cylindrical surface S2 is coaxially located on the inner peripheral side of the first cylindrical surface S1, and an examination cavity (not shown) for accommodating a small animal is disposed on the inner peripheral side of the second cylindrical surface S2. The resonant frequencies of the second saddle-shaped coil 3 and the second solenoid coil 4 correspond to heteronuclei without hydrogen nuclei, such as sodium nuclei; in other words, the second saddle-shaped coil 3 and the second solenoid coil 4 have resonant frequencies corresponding to non-hydrogen nuclei. In some embodiments, the boundary of the examination cavity is defined by the inner wall surface of the second support cylinder 8. Furthermore, the axial direction D1 of the first cylindrical surface is also the axial direction D2 of the second cylindrical surface, as well as the axial direction of the first support cylinder 7 and the second support cylinder 8, and is perpendicular to the magnetic field direction D3 (which can be called the Z direction) of the main magnetic field (which can be called the X direction). In addition, the first saddle-shaped coil 1, the first solenoid coil 2, the second saddle-shaped coil 3, and the second solenoid coil 4 are all integrated transceiver coils. In other words, the first saddle-shaped coil 1 and the first solenoid coil 2 are used for both magnetic resonance reception and magnetic resonance emission of hydrogen nuclei, while the second saddle-shaped coil 3 and the second solenoid coil 4 are used for both magnetic resonance reception and magnetic resonance emission of non-hydrogen nuclei.

[0071] In other embodiments, the first saddle-shaped coil 1 and the first solenoid coil 2 are dual-frequency coils, possessing not only the resonant frequency corresponding to hydrogen nuclei but also the resonant frequency corresponding to non-hydrogen nuclei. More specifically, the first saddle-shaped coil 1 and the first solenoid coil 2 are used for both the emission and reception of hydrogen nuclei and the emission of sodium nuclei (or other non-hydrogen nuclei), while the second saddle-shaped coil 3 and the second solenoid coil 4 are used for the reception of sodium nuclei (or other non-hydrogen nuclei).

[0072] The first saddle-shaped coil 1 is formed into a first figure-eight shape, with two loops of the first figure-eight shape arranged along the first diameter direction D6 of the first cylindrical surface S1 and extending around the first diameter direction D6.

[0073] The second saddle-shaped coil 3 is formed into a second figure-eight shape, with two loops of the second figure-eight shape arranged along the second diameter direction D7 of the second cylindrical surface S2 and extending around the second diameter direction D7. Furthermore, the first diameter direction D6 and the second diameter direction D7 are in the same direction.

[0074] The first solenoid coil 2 has two turns (i.e., two turns around the first support cylinder 7) and is formed into a third figure-eight shape. The two loops of the third figure-eight shape are arranged along the axial direction D1 of the first cylindrical surface, i.e., the aforementioned left-right direction, and extend around the axial direction D1 of the first cylindrical surface—essentially extending along the circumferential direction D4 of the first cylindrical surface. The intersection of the third figure-eight shape and the intersection of the first figure-eight shape are respectively arranged on opposite sides of the third diameter direction D8 of the first cylinder, and the third diameter direction D8 is perpendicular to the first straight line direction.

[0075] The second solenoid coil 4 has two turns (i.e., two turns around the second support cylinder 8) and is formed into a fourth figure-eight shape. The two loops of the fourth figure-eight shape are arranged along the axial direction D2 of the second cylindrical surface, i.e., the aforementioned left-right direction, and extend around the axial direction D2 of the second cylindrical surface—essentially extending along the circumferential direction D5 of the second cylindrical surface. The intersection of the fourth figure-eight shape and the intersection of the second figure-eight shape are respectively arranged on opposite sides of the fourth diameter direction D9 of the second cylinder, and the fourth diameter direction D9 is perpendicular to the aforementioned second diameter direction D7.

[0076] In other embodiments, the first solenoid coil 2 and the second solenoid coil 4 are configured to have more turns, such as 4 or 6 turns, or are configured to have only one turn (e.g., described later). Figures 9 to 11 (Example shown).

[0077] Please see Figure 5 and Figure 6 The magnetic resonance system 1000 also includes a first 3dB Hybrid power divider 5, a second 3dB Hybrid power divider 6, a first matching resistor R1 of 50 ohms, a second matching resistor R2 of 50 ohms, a third matching resistor R3 of 50 ohms, and a fourth matching resistor R4 of 50 ohms.

[0078] The first 3dB Hybrid power divider 5 has a first port connected to the magnetic resonance transmitter 300 via a first switch K1, a second port connected to the magnetic resonance receiver 400 via a second switch K2 and a first preamplifier Q1, a third port connected to the first saddle coil 1, and a fourth port connected to the first solenoid coil 2.

[0079] The first switch K1 and the second switch K2 are transmit / receive switching switches for the first coil group 10, each having an off state and an on state. When the first switch K1 is in the on state, coupling the first port with the magnetic resonance transmitter 300, the radio frequency signal generated by the magnetic resonance transmitter 300 is provided to the first 3dB Hybrid power divider 5 via the first port. The first 3dB Hybrid power divider 5 distributes two radio frequency signals according to the aforementioned radio frequency signal, which are then provided to the first saddle coil 1 and the first solenoid coil 2 via the third port and the fourth port, respectively. The first saddle coil 1 and the first solenoid coil 2 operate in the transmit state. When the second switch K2 is in the on state, coupling the second port with the magnetic resonance receiver 400, the magnetic resonance signal of the hydrogen nucleus received by the first saddle coil 1 and the first solenoid coil 2 is provided to the magnetic resonance receiver 400 sequentially via the first 3dB Hybrid power divider 5 and the preamplifier. The first saddle coil 1 and the first solenoid coil 2 operate in the receive state. Generally speaking, the first switch K1 and the second switch K2 do not work in the ON state at the same time.

[0080] Furthermore, when the first switch K1 is in the off state, decoupling the first port from the magnetic resonance transmitter 300, the first matching resistor R1 is coupled to the first port to ensure the system operates in an impedance-matched state. When the second switch K2 is in the off state, decoupling the second port from the magnetic resonance receiver 400, the second matching resistor R2 is coupled to the second port to ensure the system operates in an impedance-matched state.

[0081] Similarly, the second 3dB Hybrid power divider 6 has a fifth port connected to the magnetic resonance transmitter 300 via a third switch K3, a sixth port connected to the magnetic resonance receiver 400 via a fourth switch K4 and a second preamplifier Q2, a seventh port connected to the second saddle coil 3, and an eighth port connected to the second solenoid coil 4.

[0082] The third switch K3 and the fourth switch K4 are transmit / receive switching switches for the second coil group 20, each having an off state and an on state. When the third switch K3 is in the on state, coupling the fifth port with the magnetic resonance transmitter 300, the radio frequency signal generated by the magnetic resonance transmitter 300 is provided to the second 3dB Hybrid power divider 6 via the fifth port. The second 3dB Hybrid power divider 6 distributes two radio frequency signals according to the aforementioned radio frequency signal, which are then provided to the second saddle coil 3 and the second solenoid coil 4 via the seventh port and the eighth port, respectively. The second saddle coil 3 and the second solenoid coil 4 operate in the transmit state. When the second switch K2 is in the on state, coupling the second port with the magnetic resonance receiver 400, the non-hydrogen nucleus magnetic resonance signals received by the second saddle coil 3 and the second solenoid coil 4 are provided to the magnetic resonance receiver 400 sequentially via the second 3dB Hybrid power divider 6 and the second preamplifier Q2. The second saddle coil 3 and the second solenoid coil 4 operate in the receive state. Generally speaking, the third switch K3 and the fourth switch K4 do not work in the ON state at the same time.

[0083] Furthermore, when the first switch K1 is in the off state, decoupling the first port from the magnetic resonance transmitter 300, the first matching resistor R1 is coupled to the first port to ensure the system operates in an impedance-matched state. When the second switch K2 is in the off state, decoupling the second port from the magnetic resonance receiver 400, the second matching resistor R2 is coupled to the second port to ensure the system operates in an impedance-matched state.

[0084] In another embodiment, such as Figure 7 and Figure 8 As shown, the first coil group 10 of the coil device 200 includes two first saddle-shaped coils 1 and two first solenoid coils 2, and the two first saddle-shaped coils 1 partially overlap in the axial direction D1 of the first cylindrical surface. Additionally, the second coil group 20 includes two second saddle-shaped coils 3 and two second solenoid coils 4, and the two second saddle-shaped coils 3 partially overlap in the axial direction D2 of the second cylindrical surface.

[0085] In another embodiment, such as Figures 9 to 11 As shown, both the first solenoid coil 2 and the second solenoid coil 4 are formed as single-turn solenoid coils, each extending only one turn around the inspection cavity.

Claims

1. A multi-nuclear magnetic resonance coil arrangement for small animals, characterized by include: The first coil group includes a first saddle-shaped coil and a first solenoid coil extending on a first cylindrical surface, wherein the resonant frequencies of the first saddle-shaped coil and the first solenoid coil correspond to the first atomic nucleus; The second coil group includes a second saddle-shaped coil and a second solenoid coil extending on the second cylindrical surface. The resonant frequencies of the second saddle-shaped coil and the second solenoid coil correspond to a second atomic nucleus that is different from the first atomic nucleus. The second cylindrical surface is coaxially located on the inner circumference of the first cylindrical surface. An inspection cavity, located on the inner circumferential side of the second cylindrical surface, is used to accommodate the small animal.

2. The multi-nuclear magnetic resonance coil device according to claim 1, characterized in that, The first saddle-shaped coil is formed into a first figure-eight shape, and the two loops of the first figure-eight shape are arranged along the first diameter direction of the first cylindrical surface and extend around the first diameter direction; The second saddle-shaped coil is formed into a second figure-eight shape, wherein the two loops of the second figure-eight shape are arranged along the second diameter direction of the second cylindrical surface and extend around the second diameter direction.

3. The multi-nuclear magnetic resonance coil device according to claim 2, characterized in that, The first diameter direction and the second diameter direction are the same.

4. The multi-nuclear magnetic resonance coil device according to claim 2, characterized in that, The first solenoid coil is formed into a third figure-eight shape, the two loops of the third figure-eight shape are arranged along the axial direction of the first cylindrical surface and extend around the axial direction of the first cylindrical surface. The intersection of the third figure-eight shape and the intersection of the first figure-eight shape are respectively arranged on opposite sides of the third diameter direction of the first cylindrical surface, and the third diameter direction is perpendicular to the first diameter direction. The second solenoid coil is formed into a fourth figure-eight shape, the two loops of the fourth figure-eight shape are arranged along the axial direction of the second cylindrical surface and extend around the axial direction of the second cylindrical surface. The intersection of the fourth figure-eight shape and the intersection of the second figure-eight shape are respectively arranged on opposite sides of the fourth diameter direction of the second cylindrical surface, and the fourth diameter direction is perpendicular to the second diameter direction.

5. The multi-nuclear magnetic resonance coil assembly of claim 1, wherein, The first atomic nucleus is a hydrogen atomic nucleus, and the first saddle-shaped coil, the first solenoid coil, the second saddle-shaped coil, and the second solenoid coil are all integrated transceiver coils.

6. The multi-nuclear magnetic resonance coil apparatus according to any one of claims 1 to 5, characterized by, Two of each of the first saddle-shaped coil and the first solenoid coil are configured, and two of each of the second saddle-shaped coil and the second solenoid coil are configured. Along the axial direction of the first cylindrical surface, the two first saddle-shaped coils partially overlap. Along the axial direction of the second cylindrical surface, the two second saddle-shaped coils partially overlap.

7. The multi-nuclear magnetic resonance coil device according to any one of claims 1 to 5, characterized by, It also includes a first support cylinder and a second support cylinder coaxially disposed within the first support cylinder. The outer peripheral surface of the first support cylinder forms the first cylindrical surface, and the outer peripheral surface of the second support cylinder forms the second cylindrical surface. The first support cylinder supports the first coil group, and the second support cylinder supports the second coil group.

8. The multi-nuclear magnetic resonance coil apparatus according to any one of claims 1 to 5, characterized by, The first coil and the second coil also have a resonant frequency corresponding to the second atomic nucleus.

9. The multi-nuclear magnetic resonance coil apparatus according to any one of claims 1 to 5, characterized by, The first atomic nucleus is a hydrogen nucleus.

10. A magnetic resonance system, characterized by include: The main magnet has an inspection space, within which a main magnetic field is generated; The multinuclear magnetic resonance coil device as described in any one of claims 1 to 9; The direction of the main magnetic field is perpendicular to the axial direction of the first cylindrical surface.

11. The magnetic resonance system of claim 10, characterized by Also includes: The first 3dB hybrid power divider has a first port connected to a magnetic resonance transmitter via a first switch, a second port connected to a magnetic resonance receiver via a second switch, a third port connected to the first saddle coil, and a fourth port connected to the first solenoid coil. A first matching resistor of 50 ohms is coupled to the first port when the first switch is in the off state that decouples the first port from the magnetic resonance transmitter. A second matching resistor of 50 ohms is coupled to the second port when the second switch is in the off state that decouples the second port from the magnetic resonance receiver; The second 3dB Hybrid power divider has a fifth port connected to a magnetic resonance transmitter via a third switch, a sixth port connected to a magnetic resonance receiver via a fourth switch, a seventh port connected to the first saddle coil, and an eighth port connected to the first solenoid coil. A third matching resistor of 50 ohms is coupled to the fifth port when the second switch is in the off state that decouples the fifth port from the magnetic resonance transmitter; A 50-ohm fourth matching resistor is coupled to the sixth port when the fourth switch is in the off state, which decouples the sixth port from the magnetic resonance receiver.

12. The magnetic resonance system of claim 10, wherein, The axial direction of the first cylindrical surface corresponds to the left-right direction of the main magnet.

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