Magnetic resonance imaging system and coil interface device of magnetic resonance imaging system

Abstract

The utility model relates to a magnetic resonance imaging system and a coil interface device of the magnetic resonance imaging system. The magnetic resonance imaging system comprises the coil interface device, an animal bed and a scanning cavity. One end of the coil interface device is welded with the radio frequency receiving coil, and the other end of the coil interface device comprises a coil interface; the coil interface is matched with a system interface in the magnetic resonance imaging system; the radio frequency receiving coil is connected into the magnetic resonance imaging system through the connection of the coil interface and the system interface; when magnetic resonance imaging is carried out, the animal bed and the coil interface device enter the scanning cavity. By arranging the coil interface device and arranging the coil interface matched with the system interface in the magnetic resonance imaging system in the coil interface device, the coil interface can be simply and conveniently connected with the system interface, so that the coil interface of the coil interface device can be connected with the system interface in the magnetic resonance imaging system; and connecting the radio frequency receiving coil into the magnetic resonance imaging system.

Description

Technical Field

[0001] The present application relates to the technical field of magnetic resonance imaging, and in particular to a magnetic resonance imaging system and a coil interface device of the magnetic resonance imaging system. Background Art

[0002] The radio frequency receiving coil is an important component of the magnetic resonance imaging system. Its main function is to collect the magnetic resonance signals generated by the examined part after nuclear magnetic resonance.

[0003] In the related art, in a magnetic resonance imaging system, radio frequency receiving coils of different sizes are usually developed according to information such as the shape and size of the magnetic resonance object, so as to collect magnetic resonance signals from different objects.

[0004] Therefore, how to connect the developed radio frequency receiving coil to the magnetic resonance system has become a technical problem that needs to be solved urgently. Utility Model Content

[0005] Based on this, it is necessary to provide a magnetic resonance imaging system and a coil interface device of the magnetic resonance imaging system to address the above technical problems, so as to connect the developed radio frequency receiving coil to the magnetic resonance system.

[0006] In a first aspect, an embodiment of the present application provides a magnetic resonance imaging system, the magnetic resonance imaging system comprising a coil interface device, an animal bed and a scanning cavity; one end of the coil interface device is welded to a radio frequency receiving coil, and the other end of the coil interface device comprises a coil interface; the coil interface matches a system interface in the magnetic resonance imaging system;

[0007] The radio frequency receiving coil is connected to the magnetic resonance imaging system through the connection between the coil interface and the system interface; when performing magnetic resonance imaging, the animal bed and the coil interface device enter the scanning cavity.

[0008] In one embodiment, the coil interface device further includes a coil tuning device and a preamplifier; the coil tuning device is connected between the radio frequency receiving coil and the preamplifier, and the preamplifier is connected to the coil interface.

[0009] In one embodiment, the coil tuning device includes a coil tuning circuit, one end of the coil tuning circuit is connected to the radio frequency receiving coil, and the other end of the coil tuning circuit is connected to the preamplifier.

[0010] In one embodiment, the coil interface device further includes a first printed circuit board, and the coil tuning circuit, the preamplifier and the coil interface are all arranged on the first printed circuit board.

[0011] In one embodiment, the coil tuning device also includes a quick plug-in interface, one end of the coil tuning circuit is connected to the RF receiving coil, the other end of the coil tuning circuit is connected to one end of the quick plug-in interface, and the other end of the quick plug-in interface is connected to the preamplifier.

[0012] In one embodiment, the coil tuning device further includes a connecting cable, and the coil tuning circuit is connected to the quick plug-in interface via the connecting cable.

[0013] In one embodiment, the coil tuning device further includes a second printed circuit board; the coil tuning circuit is disposed on the second printed circuit board.

[0014] In one embodiment, the coil interface device further comprises a third printed circuit board; the quick plug-in interface, the preamplifier and the coil interface are arranged on the third printed circuit board.

[0015] In one embodiment, the magnetic resonance imaging system is used for magnetic resonance imaging of animals.

[0016] In one embodiment, the magnetic resonance imaging system comprises a magnet; the magnetic field strength of the magnet comprises 5T, 7T or 9.4T or above.

[0017] In a second aspect, the present application also provides a coil interface device for a magnetic resonance imaging system, one end of the coil interface device is welded and connected to the RF receiving coil, and the other end of the coil interface device includes a coil interface; the coil interface matches the system interface in the magnetic resonance imaging system.

[0018] In one embodiment, the coil interface device further includes a coil tuning device and a preamplifier; the coil tuning device is connected between the radio frequency receiving coil and the preamplifier, and the preamplifier is connected to the coil interface.

[0019] The magnetic resonance imaging system and the coil interface device of the magnetic resonance imaging system are as follows: the magnetic resonance imaging system includes a coil interface device, an animal bed and a scanning cavity; one end of the coil interface device is welded and connected to the radio frequency receiving coil, and the other end of the coil interface device includes a coil interface; the coil interface matches the system interface in the magnetic resonance imaging system; the radio frequency receiving coil is connected to the magnetic resonance imaging system through the connection between the coil interface and the system interface; when performing magnetic resonance imaging, the animal bed and the coil interface device enter the scanning cavity. In the magnetic resonance imaging system, by setting the coil interface device and setting a coil interface matching the system interface in the magnetic resonance imaging system in the coil interface device, the coil interface can be simply and conveniently connected to the system interface. In this way, when the radio frequency receiving coil is welded to the coil interface device, the radio frequency receiving coil can be connected to the magnetic resonance imaging system by connecting the coil interface of the coil interface device to the system interface in the magnetic resonance imaging system, so as to achieve compatibility between the radio frequency receiving coil and the magnetic resonance imaging system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 is a structural diagram of a magnetic resonance imaging system in one embodiment;

[0022] Figure 2 is a structural diagram of a coil interface device in another embodiment;

[0023] Figure 3 is a structural diagram of a coil interface device in another embodiment;

[0024] Figure 4 is a structural diagram of a coil interface device in another embodiment;

[0025] Figure 5 is a structural diagram of a coil interface device in another embodiment;

[0026] Figure 6 is a structural diagram of a coil interface device in another embodiment;

[0027] Figure 7 is a structural diagram of a coil interface device in another embodiment;

[0028] Figure 8 FIG. 4 is a structural diagram of a coil interface device in another embodiment.

[0029] Description of reference numerals:

[0030] 1 Animal bed; 2 Scanning chamber;

[0031] 10 coil interface device; 11 coil interface;

[0032] 12 coil tuning device; 13 preamplifier;

[0033] 14 a first printed circuit board; 15 a third printed circuit board;

[0034] 20 RF receiving coil; 30 system interface;

[0035] 121 coil tuning circuit; 122 quick plug-in interface;

[0036] 123 a connecting cable; 124 a second printed circuit board. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0042] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0043] Magnetic resonance imaging is a biological magnetic spin imaging technology that utilizes the characteristics of atomic nuclear spin motion. In an external magnetic field, a signal is generated after a radio frequency pulse. The signal is detected by a detector and input into a computer. After processing and conversion, the image is displayed on the screen. This is magnetic resonance imaging.

[0044] In the magnetic resonance imaging system, the radio frequency receiving coil is an important component, and its main function is to collect the magnetic resonance signals generated by the examined part after nuclear magnetic resonance. For different examined parts (such as animal body parts), the specifications of the radio frequency receiving coil are different. For example, for parts with large differences such as the head, body, limbs and abdomen, the required coverage area (i.e., collection area) of the radio frequency receiving coil and the requirements for the shape of the radio frequency receiving coil are also different.

[0045] In the related art, radio frequency receiving coils of different sizes and shapes are usually developed according to information such as the shape and size of the magnetic resonance object, so as to collect magnetic resonance signals from different objects.

[0046] After a new radio frequency receiving coil is developed, it is necessary to connect the developed radio frequency receiving coil to a magnetic resonance system for use. Therefore, how to connect the developed radio frequency receiving coil to a magnetic resonance system becomes a technical problem that needs to be solved urgently.

[0047] Based on this, the present application provides a magnetic resonance imaging system. By setting up a coil interface device and setting up a coil interface matching the system interface in the magnetic resonance imaging system in the coil interface device, the coil interface can be simply and conveniently connected to the system interface. In this way, when the radio frequency receiving coil is welded to the coil interface device, the coil interface of the coil interface device can be connected to the system interface in the magnetic resonance imaging system to connect the radio frequency receiving coil to the magnetic resonance imaging system, thereby achieving compatibility between the radio frequency receiving coil and the magnetic resonance imaging system.

[0048] The coil interface device is described in detail below through some embodiments.

[0049] In an exemplary embodiment, Figure 1 As shown, the embodiment of the present application provides a magnetic resonance imaging system, which includes a coil interface device 10, an animal bed 1 and a scanning cavity 2; one end of the coil interface device 10 is welded to the radio frequency receiving coil 20, and the other end of the coil interface device 10 includes a coil interface 11; the coil interface 11 matches the system interface 30 in the magnetic resonance imaging system;

[0050] The radio frequency receiving coil 20 is connected to the magnetic resonance imaging system through the connection between the coil interface 11 and the system interface 30 ; when performing magnetic resonance imaging, the animal bed 1 and the coil interface device enter the scanning cavity 2 .

[0051] In an embodiment of the present application, the magnetic resonance imaging system is used for animal magnetic resonance imaging. In addition to a coil interface device, an animal bed and a scanning cavity, the magnetic resonance imaging system also includes a magnet, wherein the magnetic field strength of the magnet includes 5T, 7T or above 9.4T.

[0052] The radio frequency receiving coil 20 refers to a receiving coil developed according to information such as the shape and size of different magnetic resonance objects. The radio frequency receiving coil 20 can be a surface coil, that is, a coil that can be placed on the body surface of the magnetic resonance object for imaging. Since this type of coil is close to the imaging part, the signal strength of the received magnetic resonance signal is higher, thereby improving the signal-to-noise ratio of the image.

[0053] The coil interface 11 is an interface matching the system interface 30 in the magnetic resonance imaging system, and is used to connect to the system interface 30 in the magnetic resonance imaging system so as to connect the radio frequency receiving coil 20 to the magnetic resonance imaging system.

[0054] The system interface 30 in the magnetic resonance imaging system may be a radio frequency interface, which transmits analog signals and can minimize radio frequency signal loss, and may include radio frequency connectors such as snap-fit ​​connectors, small threaded coaxial connectors, and push-in locking radio frequency coaxial connectors.

[0055] It is understandable that the type of the coil interface 11 needs to be determined according to the interface type of the magnetic resonance system system interface 30. For example, if the magnetic resonance system system interface 30 is a snap-fit ​​connector, the coil interface 11 is also an interface matching the snap-fit ​​connector.

[0056] One end of the coil interface device 10 is welded to the radio frequency receiving coil 20, and the other end of the coil interface device 10 includes a coil interface 11, and the coil interface 11 matches the system interface 30 in the magnetic resonance imaging system. In this way, when the coil interface 11 in the coil interface device 10 is connected to the system interface 30 in the magnetic resonance imaging system, the radio frequency receiving coil 20 can be connected to the magnetic resonance imaging system.

[0057] In the magnetic resonance imaging system provided in the embodiment of the present application, the magnetic resonance imaging system includes a coil interface device, an animal bed and a scanning cavity; one end of the coil interface device is welded and connected to the radio frequency receiving coil, and the other end of the coil interface device includes a coil interface; the coil interface matches the system interface in the magnetic resonance imaging system; the radio frequency receiving coil is connected to the magnetic resonance imaging system through the connection between the coil interface and the system interface; when performing magnetic resonance imaging, the animal bed and the coil interface device enter the scanning cavity. In the magnetic resonance imaging system, by setting a coil interface that matches the system interface in the magnetic resonance imaging system in the coil interface device, the coil interface can be simply and conveniently connected to the system interface. In this way, when the radio frequency receiving coil is welded to the coil interface device, the radio frequency receiving coil can be connected to the magnetic resonance imaging system by connecting the coil interface of the coil interface device to the system interface in the magnetic resonance imaging system, so as to achieve compatibility between the radio frequency receiving coil and the magnetic resonance imaging system.

[0058] In a magnetic resonance imaging system, not only is it required that the impedance of the RF transmitting coil must match the impedance of the RF transmission line connecting the RF transmitting coil and the RF amplifier, but also that the eigenfrequency of the RF coil corresponds to the magnetic field strength of the system, so that the RF coil of the magnetic resonance imaging device resonates at the hydrogen proton resonance frequency to achieve the excitation of the magnetic resonance signal and the reception of the maximum magnetic resonance signal. If the eigenfrequency of the RF coil cannot correspond to the magnetic field strength of the system well, the image signal-to-noise ratio of the magnetic resonance imaging system will decrease. In order to ensure the image signal-to-noise ratio and image quality as much as possible, the RF receiving coil needs to be tuned to adjust the coil's own oscillation frequency to the nuclear magnetic resonance frequency so that the coil can receive the maximum magnetic resonance signal. This is explained below through an embodiment. In an exemplary embodiment, Figure 2 As shown, the coil interface device 10 further includes a coil tuning device 12 and a preamplifier 13 ; the coil tuning device 12 is connected between the RF receiving coil 20 and the preamplifier 13 , and the preamplifier 13 is connected to the coil interface 11 .

[0059] The coil tuning device is used to tune the RF receiving coil. The coil tuning device 12 may include a variable capacitor and an adjustment unit. The capacitance value of the variable capacitor may be adjusted by the adjustment unit to achieve tuning of the RF receiving coil.

[0060] A preamplifier is a circuit or electronic device placed between the signal source and the amplifier stage. It is also the first amplifier in the amplifier circuit, used to amplify the input signal to a sufficient level so that it can be processed by the subsequent amplifier or processing circuit. Without a preamplifier, the final signal will become noisy or distorted. Therefore, the preamplifier is usually placed close to the RF receiving coil to reduce the impact of noise and interference.

[0061] The preamplifier 13 may include a current sensitive preamplifier, a parasitic capacitance preamplifier, a charge sensitive preamplifier, and the like.

[0062] In the embodiment of the present application, the coil tuning device 12 is arranged between the RF receiving coil 20 and the preamplifier 13, and the preamplifier 13 is also connected to the coil interface 11, so that the RF receiving coil 20 can be tuned by the coil tuning device 12 to adjust the coil's own oscillation frequency to the nuclear magnetic resonance frequency, so that the RF receiving coil 20 can receive the maximum magnetic resonance signal, improve the image signal-to-noise ratio and image quality. In addition, the preamplifier 13 is arranged between the coil tuning device 12 and the coil interface 11, so that the received magnetic resonance signal can be amplified, the relative influence of external interference can be reduced, and the image signal-to-noise ratio can be further improved.

[0063] In the magnetic resonance imaging system provided in the embodiment of the present application, the coil interface device also includes a coil tuning device and a preamplifier; the coil tuning device is connected between the radio frequency receiving coil and the preamplifier, and the preamplifier is connected to the coil interface. In the coil interface device, by setting the coil tuning device, the tuning processing of the radio frequency receiving coil can be realized, so that the radio frequency receiving coil can receive the maximum magnetic resonance signal, and the image signal-to-noise ratio and image quality can be improved; in addition, by setting the preamplifier between the coil tuning device and the coil interface, the magnetic resonance signal can be amplified, the relative influence of external interference can be reduced, and the image signal-to-noise ratio and image quality can be further improved.

[0064] In order to tune the RF receiving coil, a coil tuning circuit may be provided in the coil tuning device, and the impedance characteristics of the inductor and the capacitor may be utilized to select and filter signals of different frequencies. This is described below by an embodiment. In an exemplary embodiment, Figure 3 As shown, the coil tuning device 12 includes a coil tuning circuit 121 , one end of the coil tuning circuit 121 is connected to the RF receiving coil 20 , and the other end of the coil tuning circuit 121 is connected to the preamplifier 13 .

[0065] Tuning circuits can filter and select signals, mainly by using the principle that inductors and capacitors have different impedance characteristics for signals of different frequencies. Tuning circuits can be composed in different ways depending on the specific application requirements and frequency range.

[0066] Optionally, the coil tuning circuit 121 can be a series inductor and capacitor tuning circuit and a parallel inductor and capacitor tuning circuit, etc. Among them, the series inductor and capacitor tuning circuit is composed of an inductor and a capacitor in series. When the frequency of the input signal is the same as the resonant frequency, the impedances of the inductor and the capacitor are offset respectively, forming a low impedance path, and the signal passes; when the frequency of the input signal is different from the resonant frequency, the impedances of the inductor and the capacitor are not offset, forming a high impedance path, and the signal is filtered out. The parallel inductor and capacitor tuning circuit is composed of an inductor and a capacitor in parallel. When the frequency of the input signal is the same as the resonant frequency, the inductor and the capacitor are in a high impedance state, and the signal is filtered out; when the frequency of the input signal is different from the resonant frequency, the impedance of the inductor and the capacitor is not high, and the signal passes through.

[0067] Optionally, the coil tuning circuit 121 can also adopt a transformer tuning circuit and a resistor and capacitor tuning circuit. Among them, the transformer tuning circuit realizes signal tuning by changing the ratio of the transformer. By adjusting the winding ratio of the transformer, the effective value and resonant frequency of the inductance can be changed. The resistor and capacitor tuning circuit realizes signal tuning by combining resistance and capacitance.

[0068] In the embodiment of the present application, a coil tuning circuit 121 is provided in the coil tuning device 12, and one end of the coil tuning circuit 121 is connected to the RF receiving coil 20, and the RF receiving coil can be tuned by the coil tuning circuit 121. Moreover, different inductor and capacitor composition methods can be adopted according to specific application requirements and frequency ranges. The other end of the coil tuning circuit 121 is connected to the preamplifier to amplify the magnetic resonance signal received by the RF receiving coil 20, thereby improving the signal-to-noise ratio of the RF receiving coil.

[0069] In the magnetic resonance imaging system provided by the embodiment of the present application, the coil tuning device includes a coil tuning circuit, one end of the coil tuning circuit is connected to the radio frequency receiving coil, and the other end of the coil tuning circuit is connected to the preamplifier. In the coil interface device, by setting the coil tuning circuit in the coil tuning device, one end of the coil tuning circuit is connected to the radio frequency receiving coil, so that the radio frequency receiving coil can be tuned by the coil tuning circuit; in addition, the other end of the coil tuning circuit is connected to the preamplifier, and the magnetic resonance signal received by the radio frequency receiving coil can be amplified by the preamplifier to improve the signal-to-noise ratio of the radio frequency receiving coil.

[0070] The coil interface device includes a coil tuning circuit, a preamplifier and a coil interface, and the coil tuning circuit, the preamplifier and the coil interface need to be connected through a circuit. In order to enhance the circuit stability and performance, the coil tuning circuit, the preamplifier and the coil interface can be integrated on a printed circuit board. This is described below through an embodiment. In an exemplary embodiment, Figure 4 As shown, the coil interface device 10 further includes a first printed circuit board 14 , on which the coil tuning circuit 121 , the preamplifier 13 and the coil interface 11 are all arranged; and the RF receiving coil 20 is soldered on the first printed circuit board 14 .

[0071] Among them, printed circuit boards are one of the core technologies of integrated circuits used in electronic manufacturing. They are the support of electronic components and the carrier of electrical connections of electronic components. This technology allows conductive circuits and electronic components to be bonded to the same non-conductive material to form a fixed electronic assembly. The connection between these circuits and components is made of conductor layers such as copper foil.

[0072] Printed circuit boards can accommodate a large number of electrical components in a relatively small space and can be produced automatically. Compared with traditional circuit boards that use wires to connect electronic components, printed circuit boards use printing to complete the conductive channel extension on the board, making the circuit connection between electronic components faster, more accurate and reliable. Its main function is to connect various electronic components through circuits, playing the role of conduction and transmission.

[0073] The first printed circuit board 14 may include circuits and patterns, dielectric layers, vias, solder resist ink, and silk screen printing, etc. It is based on an insulating board, cut into a certain size, with at least one conductive pattern attached thereon, and provided with holes (such as component holes, fastening holes, metallized holes, etc.) for mounting electronic components and realizing mutual connection between electronic components. Depending on the number of circuit layers of the printed circuit board, the first printed circuit board 14 may include a single-sided board, a double-sided board, a multi-layer board, etc.

[0074] In the embodiment of the present application, the coil tuning circuit 121, the preamplifier 13 and the coil interface 11 are all arranged on the first printed circuit board 14, so that the circuit connection between the coil tuning circuit 121, the preamplifier 13 and the coil interface 11 can be realized. Compared with the traditional method of connecting with wires, this method makes the circuit connection between the coil tuning circuit 121, the preamplifier 13 and the coil interface 11 faster, more accurate and more reliable. In addition, the RF receiving coil 20 can be welded on the first printed circuit board 14, and close to the side of the coil tuning circuit 121, and the RF receiving coil 20 can be connected to the system interface 30 in the magnetic resonance system through the coil interface arranged on the first printed circuit board 14, so as to realize the connection of the RF receiving coil 20 to the magnetic resonance system.

[0075] In the magnetic resonance imaging system provided in the embodiment of the present application, the coil interface device further includes a first printed circuit board, and the coil tuning circuit, the preamplifier and the coil interface are all arranged on the first printed circuit board. In the coil interface device, by arranging the first printed circuit board, the coil tuning circuit, the preamplifier and the coil interface can be integrated into the first printed circuit board to realize the circuit connection of the coil tuning circuit, the preamplifier and the coil interface. Compared with the traditional way of connecting with wires, such circuit connection is faster, more accurate and more reliable.

[0076] When the coil tuning circuit and the preamplifier are integrated on a printed circuit board, the coil tuning circuit and the preamplifier can be directly connected in circuit without the need for other connecting devices. When the coil tuning circuit and the preamplifier are not arranged on the same printed circuit board, it is necessary to use certain connecting devices to connect the coil tuning circuit and the preamplifier. This is explained below through an embodiment. In an exemplary embodiment, Figure 5 As shown, the coil tuning device 12 also includes a quick plug-in interface 122, one end of the coil tuning circuit 121 is connected to the RF receiving coil 20, the other end of the coil tuning circuit 121 is connected to one end of the quick plug-in interface 122, and the other end of the quick plug-in interface 122 is connected to the preamplifier 13.

[0077] The quick-plug interface 122 is a connector that realizes electrical connection by quick plugging and unplugging. The quick-plug interface has fast connection and removal speed, which can reduce equipment failures caused by poor connection or poor contact and improve equipment reliability.

[0078] In the embodiment of the present application, a quick plug-in interface 122 is provided in the coil tuning device 12, one end of the coil tuning circuit 121 is connected to one end of the quick plug-in interface 122, and the other end of the quick plug-in interface 122 is connected to the preamplifier 13, that is, the connection between the coil tuning circuit and the preamplifier can be simply and conveniently achieved through the quick plug-in interface; and when the other end of the coil tuning circuit 121 is connected to the RF receiving coil 20, that is, when the coil tuning circuit 121 is connected to the preamplifier 13 through the quick plug-in interface 122, the RF receiving coil 20 can be connected to the magnetic resonance system through the connection of the coil interface 11 and the system interface 30 of the magnetic resonance system.

[0079] In the magnetic resonance imaging system provided by the embodiment of the present application, the coil tuning device also includes a quick plug-in interface, one end of the coil tuning circuit is connected to the RF receiving coil, the other end of the coil tuning circuit is connected to one end of the quick plug-in interface, and the other end of the quick plug-in interface is connected to the preamplifier. In the coil interface device, by setting a quick plug-in interface in the coil tuning device, the coil tuning circuit can be simply and conveniently connected to the preamplifier; and the quick plug-in connector has a fast connection and removal speed, which can effectively reduce equipment failures caused by poor connection or poor contact, improve the reliability of the equipment, and the quick plug-in connector is very convenient to use, can quickly connect and remove electrical equipment, and also improve the maintenance efficiency of the equipment.

[0080] The circuit connection between the coil tuning circuit and the quick plug-in interface can be achieved through a connecting cable. Based on this, in an exemplary embodiment, Figure 6 As shown, the coil tuning device 12 further includes a connecting cable 123 , and the coil tuning circuit 121 is connected to the quick plug-in interface 122 via the connecting cable 123 .

[0081] The connecting cable 123 may be a radio frequency cable, including a conductor, an insulating layer, and a shielding layer. The conductor is usually made of materials such as copper wire or copper tape, the insulating layer is made of materials with good high-frequency performance such as foam polyethylene and solid polyethylene, and the shielding layer is made of materials such as copper mesh and aluminum foil to shield interference from external electromagnetic waves. The type of radio frequency cable can also be determined according to actual application requirements, and may include coaxial cable / balanced cable and tubular cable.

[0082] In the embodiment of the present application, the coil tuning circuit 121 is connected to the quick plug-in interface 122 via the connecting cable 123 , which can reduce a certain signal loss during the transmission of the magnetic resonance signal.

[0083] In the magnetic resonance imaging system provided in the embodiment of the present application, the coil tuning device further includes a connecting cable, and the coil tuning circuit is connected to the quick plug interface via the connecting cable. In the coil interface device, by providing a connecting cable in the coil tuning device, a circuit connection between the coil tuning circuit and the quick plug interface can be achieved.

[0084] When the coil tuning circuit and the preamplifier are connected via a quick plug-in interface, it means that the coil tuning circuit and the preamplifier are not integrated on a printed circuit board. Based on this, in an exemplary embodiment, Figure 7 As shown, the coil tuning device 12 further includes a second printed circuit board 124 ; the coil tuning circuit 121 is disposed on the second printed circuit board 124 .

[0085] The second printed circuit board 124 can be the same as the first printed circuit board 14, including circuits and drawings, dielectric layers, vias, solder mask ink and silk screen, etc. According to actual application requirements, the second printed circuit board 124 can select printed circuit boards with different circuit layers, including single-sided boards, double-sided boards and multi-layer boards, etc.

[0086] In the embodiment of the present application, the coil tuning circuit 121 is arranged on the second printed circuit board 124, and the coil tuning circuit 121 can be connected to the preamplifier 13 through the quick plug-in interface 122; in addition, the RF receiving coil 20 can be soldered on the second printed circuit board 124, that is, when the coil tuning circuit 121 is connected to the preamplifier 13 through the quick plug-in interface 122, the RF receiving coil 20 can be connected to the magnetic resonance system through the connection between the coil interface 11 and the system interface 30 in the magnetic resonance system.

[0087] In the magnetic resonance imaging system provided by the embodiment of the present application, the coil tuning device further includes a second printed circuit board; the coil tuning circuit is arranged on the second printed circuit board. In the coil interface device, by arranging the second printed circuit board in the coil tuning device, the coil tuning circuit can be arranged on the second printed circuit board, providing another arrangement mode of the coil tuning circuit, in which the coil tuning circuit can be connected to the circuit of the preamplifier through a quick plug-in interface.

[0088] Since the coil tuning circuit and the preamplifier in the above embodiment are not on the same printed circuit board, and the coil tuning circuit board is arranged on a second printed circuit board, it is necessary to provide another printed circuit board for the preamplifier to realize the circuit connection between the quick plug-in interface, the preamplifier and the coil interface. This is explained below through an embodiment. In an exemplary embodiment, Figure 8 As shown, the coil interface device 10 further includes a third printed circuit board 15 ; the quick plug-in interface 122 , the preamplifier 13 and the coil interface 11 are arranged on the third printed circuit board 15 .

[0089] The third printed circuit board 15 can be the same as the first printed circuit board 14 or the second printed circuit board 124, including circuits and drawings, dielectric layers, vias, solder mask ink and silk screen, etc. According to actual application requirements, the third printed circuit board 15 can select printed circuit boards with different numbers of circuit layers, including single-sided boards, double-sided boards and multi-layer boards, etc.

[0090] In the embodiment of the present application, a third printed circuit board 15 is provided in the coil interface device 10, and the quick plug-in interface 122, the preamplifier 13 and the coil interface 11 are provided on the third printed circuit board 15, so that the circuit connection between the quick plug-in interface 122, the preamplifier 13 and the coil interface 11 can be realized; when the RF receiving coil 20 is welded on the second printed circuit board 124, the RF receiving coil 20 can be conveniently connected to the magnetic resonance system through the connection with the quick plug-in interface 122.

[0091] In the magnetic resonance imaging system provided in the embodiment of the present application, the coil interface device further includes a third printed circuit board; the quick plug-in interface, the preamplifier and the coil interface are arranged on the third printed circuit board. In the coil interface device, by arranging the third printed circuit board, the quick plug-in interface, the preamplifier and the coil interface are all integrated on the third printed circuit board, so that the circuit connection between the quick plug-in interface, the preamplifier and the coil interface can be realized.

[0092] In an exemplary embodiment, the present application also provides a coil interface device of a magnetic resonance imaging system, one end of the coil interface device is welded and connected to the radio frequency receiving coil, and the other end of the coil interface device includes a coil interface; the coil interface matches the system interface in the magnetic resonance imaging system; the coil interface device also includes a coil tuning device and a preamplifier; the coil tuning device is connected between the radio frequency receiving coil and the preamplifier, and the preamplifier is connected to the coil interface.

[0093] In the embodiment of the present application, the structure of the coil interface device is consistent with the structure of the coil interface device 10 in the above embodiment, and will not be described in detail here.

[0094] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0095] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model shall be subject to the attached claims.

Claims

1. A magnetic resonance imaging system, characterized in that: The magnetic resonance imaging system comprises a coil interface device, an animal bed and a scanning cavity; one end of the coil interface device is welded and connected to the radio frequency receiving coil, and the other end of the coil interface device comprises a coil interface; the coil interface matches the system interface in the magnetic resonance imaging system; The radio frequency receiving coil is connected to the magnetic resonance imaging system through the connection between the coil interface and the system interface; when performing magnetic resonance imaging, the animal bed and the coil interface device enter the scanning cavity.

2. The magnetic resonance imaging system according to claim 1, characterized in that The coil interface device also includes a coil tuning device and a preamplifier; the coil tuning device is connected between the radio frequency receiving coil and the preamplifier, and the preamplifier is connected to the coil interface.

3. The magnetic resonance imaging system according to claim 2, characterized in that: The coil tuning device comprises a coil tuning circuit, one end of the coil tuning circuit is connected to the radio frequency receiving coil, and the other end of the coil tuning circuit is connected to the preamplifier.

4. The magnetic resonance imaging system according to claim 3, characterized in that: The coil interface device further comprises a first printed circuit board, and the coil tuning circuit, the preamplifier and the coil interface are all arranged on the first printed circuit board.

5. The magnetic resonance imaging system according to claim 3, characterized in that: The coil tuning device also includes a quick plug-in interface, one end of the coil tuning circuit is connected to the RF receiving coil, the other end of the coil tuning circuit is connected to one end of the quick plug-in interface, and the other end of the quick plug-in interface is connected to the preamplifier.

6. The magnetic resonance imaging system according to claim 5, characterized in that: The coil tuning device further comprises a connecting cable, and the coil tuning circuit is connected to the quick plug-in interface via the connecting cable.

7. The magnetic resonance imaging system according to claim 5, characterized in that The coil tuning device further comprises a second printed circuit board; the coil tuning circuit is arranged on the second printed circuit board.

8. The magnetic resonance imaging system according to claim 7, characterized in that: The coil interface device also includes a third printed circuit board; the quick plug-in interface, the preamplifier and the coil interface are arranged on the third printed circuit board.

9. The magnetic resonance imaging system according to any one of claims 1 to 8, characterized in that: The magnetic resonance imaging system is used for animal magnetic resonance imaging.

10. The magnetic resonance imaging system according to any one of claims 1 to 8, characterized in that: The magnetic resonance imaging system includes a magnet; the magnetic field strength of the magnet includes 5T, 7T or above 9.4T.

11. A coil interface device for a magnetic resonance imaging system, characterized in that: One end of the coil interface device is welded to the radio frequency receiving coil, and the other end of the coil interface device comprises a coil interface; the coil interface matches the system interface in the magnetic resonance imaging system.

12. The coil interface device according to claim 11, characterized in that: The coil interface device also includes a coil tuning device and a preamplifier; the coil tuning device is connected between the radio frequency receiving coil and the preamplifier, and the preamplifier is connected to the coil interface.

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