Anti-radio frequency interference device and magnetic resonance equipment

Abstract

The utility model relates to an anti-radio frequency interference device and magnetic resonance equipment. The anti-radio frequency interference device comprises a resonance part with a hollow structure, and the difference value between the resonance frequency of the resonance part and the main frequency of the magnetic resonance equipment is smaller than a preset threshold value; the hollow structure of the resonance part is used for an electrocardio electrode wire of magnetic resonance equipment to pass through; the main frequency of the magnetic resonance equipment is determined by the magnetic field intensity of the magnetic resonance equipment. By adopting the method, the accuracy of electrocardiosignals and the quality of magnetic resonance images can be improved.

Description

Technical Field

[0001] This application relates to the field of magnetic resonance technology, and in particular to an anti-radio frequency interference device and a magnetic resonance device. Background Technology

[0002] With the continuous development of magnetic resonance imaging (MRI) technology, it has become possible to perform MRI scans on moving parts of the body. For example, the moving parts could be the heart, blood vessels, or lungs of the scanned object.

[0003] In related technologies, before imaging a moving part, the electrocardiogram (ECG) electrode wires in the magnetic resonance imaging (MRI) device are connected to the object being scanned. The potential difference on the surface of the object is converted into an ECG signal, and this ECG signal is used to trigger a scan of the moving part.

[0004] However, the magnetic field generated by the magnetic resonance imaging (MRI) device in related technologies can interfere with electrocardiogram (ECG) signals, resulting in low accuracy of ECG signals and affecting the quality of MRI images. Summary of the Invention

[0005] Therefore, it is necessary to provide an anti-radio frequency interference device and a magnetic resonance imaging device to address the above-mentioned technical problems, which can improve the accuracy of electrocardiogram signals and the quality of magnetic resonance images.

[0006] In a first aspect, this application provides an anti-radio frequency interference device, which includes a resonant component with a hollow structure, wherein the difference between the resonant frequency of the resonant component and the main frequency of the magnetic resonance device is less than a preset threshold.

[0007] The hollow structure of the resonant component is used to allow the electrocardiogram electrode wires of the magnetic resonance imaging device to pass through;

[0008] The dominant frequency of a magnetic resonance imaging (MRI) device is determined by the magnetic field strength of the device.

[0009] In one embodiment, the resonant component includes a first resonant component and a second resonant component, and there is a preset distance interval between the first resonant component and the second resonant component;

[0010] Both the first and second resonant components include a capacitor and a conductive metal shell, which can be considered equivalent to an inductor component, referred to as an inductor assembly. In one embodiment, the capacitor is embedded in the middle of the inductor assembly, and the capacitor and the inductor assembly are connected by welding or bonding.

[0011] In one embodiment, the resonant component includes multiple hole-like structures at both ends, each hole-like structure being used to place a fixing member;

[0012] The distance between the first resonant component and the second resonant component is adjusted by a fixing device.

[0013] In one embodiment, the hollow structure of the resonant component is cylindrical, and the diameter of the cylinder is determined according to the diameter of the electrocardiogram electrode wires of the magnetic resonance imaging device.

[0014] In one embodiment, the anti-radio frequency interference device further includes a protective housing that surrounds the resonant component.

[0015] In one embodiment, the protective shell includes a first shell and a second shell, the first shell being provided with a slot and the second shell being provided with a buckle;

[0016] When the ECG electrode wires of the magnetic resonance imaging device are located in the hollow structure of the resonant component, the latch of the second housing is engaged in the slot of the first housing under the action of external force.

[0017] In one embodiment, the protective shell includes a first shell and a second shell, which are fixed together by screws.

[0018] In one embodiment, the anti-radio frequency interference device is disposed at one end of the ECG electrode line near the electrode pad.

[0019] Secondly, this application also provides a magnetic resonance imaging (MRI) device, which includes the radio frequency interference (RFI) protection device, electrocardiogram (ECG) electrode wires, and radio frequency coils mentioned in the first aspect above. The hollow structure of the resonant component in the RPI protection device allows the ECG electrode wires of the MRI device to pass through. The first end of the ECG electrode wires is connected to the circuit system, and the ECG signal is transmitted to the MRI data processing device through the circuit system. The second end is connected to the scanned object.

[0020] The aforementioned radio frequency interference (RFI) suppression device and magnetic resonance imaging (MRI) device include a resonant component with a hollow structure. The difference between the resonant frequency of the resonant component and the main frequency of the MRI device is less than a preset threshold. The hollow structure of the resonant component allows the ECG electrode wires of the MRI device to pass through. The main frequency of the MRI device is determined by the magnetic field strength of the MRI device. Because the main frequency of the resonant component in the RFI suppression device is close to the main frequency of the MRI device, and the ECG electrode wires are located in the hollow structure of the resonant component, the resonant component can suppress the interference generated by the radio frequency field of the MRI device on the ECG signal, avoiding the influence of the radio frequency field on the ECG signal acquisition and transmission process, and improving the accuracy of the ECG signal and the quality of the MRI image. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the electrocardiogram signal without the application of radio frequency pulses in one embodiment;

[0023] Figure 2 This is a schematic diagram of the electrocardiogram signal when a radio frequency pulse is applied in one embodiment;

[0024] Figure 3 This is a schematic diagram of an anti-radio frequency interference device in one embodiment;

[0025] Figure 4 This is a schematic diagram of the electrocardiogram signal of a mouse in one embodiment;

[0026] Figure 5 This is a schematic diagram of a resonant component in an anti-radio frequency interference device in one embodiment;

[0027] Figure 6 This is a schematic diagram of a resonant component in one embodiment;

[0028] Figure 7 This is an equivalent circuit diagram of the anti-radio frequency interference device in one embodiment;

[0029] Figure 8 This is a schematic diagram of the protective housing of an anti-radio frequency interference device in one embodiment.

[0030] Explanation of reference numerals in the attached figures:

[0031] 10: Anti-radio frequency interference device; 11: Resonant component; 111: First resonant component; 112: Second resonant component; C: Capacitor; L: Inductor component; 113: Hole structure; 12: Protective shell; 121: First shell; 122: Second shell; 20: Magnetic resonance imaging device; 201: ECG electrode wire; 202: Electrode sheet. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0033] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0034] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, for example, two, three, etc., unless otherwise explicitly specified.

[0035] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0038] Before introducing the technical solution of this application, a brief introduction to the background technology of this application will be given first.

[0039] With the continuous development of magnetic resonance imaging (MRI) technology, it has become possible to perform MRI scans on moving parts of the body. For example, moving parts could include the heart, blood vessels, or lungs.

[0040] In related technologies, before imaging a moving part, the electrocardiogram electrode line 201 in the magnetic resonance device 20 is connected to the scanned object to convert the potential difference on the surface of the scanned object into an electrocardiogram signal, and the electrocardiogram signal is used to trigger the scan of the moving part.

[0041] The scanning principle in the existing technology will be described in detail below. Specifically, the main magnetic field frequency of the magnetic resonance imaging (MRI) device 20 is relatively fixed and is proportional to the magnetic field strength. The main magnetic field frequency can be expressed as: f = γB0, where γ represents the gyromagnetic ratio. Different nuclides have different gyromagnetic ratios. For example, for the commonly used hydrogen nucleus, γ = 42.58 MHz / T (megahertz / tesla). B0 represents the main magnetic field strength of the MRI device 20. Commonly used magnetic field strengths generally include 3T (tesla), 9.4T, etc. Therefore, for the commonly used hydrogen nucleus, the main frequency of the MRI device 20 at 3T is approximately 128 MHz, and for the commonly used hydrogen nucleus at 9.4T, the main frequency of the MRI device 20 is approximately 400 MHz.

[0042] In order to resonate with a specific nuclide of the object being scanned in the magnetic resonance imaging device 20 (e.g., a human or animal), a radio frequency field with a frequency close to that of the main magnetic field needs to be applied through a radio frequency coil. The bandwidth of this radio frequency field is generally within a few kilohertz (Hz). Since this radio frequency field is a constantly changing magnetic field, it will cause a change in the electric field between the object being tested and the connected ECG electrode line 201, thereby affecting the ECG signal detected by the ECG electrode line 201.

[0043] The following explanation will be based on a mouse as the subject of the scan, using a sequence of scans involving electrocardiogram triggering and other related imaging techniques. Figure 1 This is a schematic diagram of the electrocardiogram (ECG) signal without the application of radio frequency pulses. As can be seen from the diagram, each peak represents the R-wave of the ECG signal. Figure 2This is a schematic diagram of the electrocardiogram signal when a radiofrequency pulse is applied, compared to... Figure 1 A small interference peak appears after each R wave, as indicated by the arrow in the figure. The intensity of this interference peak is positively correlated with the intensity of the applied radiofrequency pulse. When the interference peak is large, it can cause problems such as missed detection and false detection of R waves, which will affect the sequential scanning imaging of ECG triggering and other related processes.

[0044] Since the source of the interference signal is the radio frequency pulse generated by the magnetic resonance imaging (MRI) device 20, and the frequency of the radio frequency pulse is only within a narrow band of the main frequency of the magnetic field, while the heart rate of humans and animals is within tens of Hz, the two are very different. Therefore, the interference signal generated by the radio frequency pulse can be filtered out by a filtering circuit. Therefore, to address the above problems, this application provides an anti-radio frequency interference device 10 and an MRI device 20. The anti-radio frequency interference device 10, by generating a resonant frequency close to the main frequency of the MRI device 20, can reduce the interference of the radio frequency field on the electrocardiogram (ECG) signal, and improve the accuracy of the ECG signal and the quality of the MRI image. Of course, the technical solution provided in the embodiments of this application is not limited to solving only the above problems, and also has other technical effects, which can be found in the following embodiments. The technical solution of this application will now be described in detail.

[0045] In one embodiment, Figure 3 As shown, an anti-radio frequency interference device 10 is provided. The anti-radio frequency interference device 10 includes a resonant component 11 with a hollow structure. The difference between the resonant frequency of the resonant component 11 and the main frequency of the magnetic resonance device 20 is less than a preset threshold.

[0046] The hollow structure of the resonant component 11 is used for the ECG electrode wires 201 of the magnetic resonance device 20 to pass through;

[0047] The main frequency of the magnetic resonance device 20 is determined by the magnetic field strength of the magnetic resonance device 20.

[0048] The signal that affects the electrocardiogram (ECG) signal is the radio frequency field in the magnetic resonance imaging (MRI) device 20. Therefore, to reduce the interference of the radio frequency field on the ECG signal, the resonant frequency of the anti-radio frequency interference device 10 needs to be adjusted to be close to the main frequency of the MRI device 20, so as to achieve the purpose of reducing radio frequency field interference.

[0049] When scanning the moving parts of a subject (e.g., heart, lungs, etc.) using a magnetic resonance imaging (MRI) device 20, the MRI device 20 needs to contact the subject's skin surface through the electrode pads 202 at the end of the ECG electrode wires 201 to obtain the subject's electrocardiogram (ECG) signal. During this process, the radio frequency (RF) field of the MRI device 20 can interfere with the ECG signal. Therefore, this application provides an anti-RF interference device 10, which can be wrapped around the ECG electrode wires 201 to suppress the interference of the RF field on the ECG signal.

[0050] In one embodiment, the hollow structure of the resonant component 11 is cylindrical, and the diameter of the cylinder is determined according to the diameter of the ECG electrode wire 201 of the magnetic resonance imaging device 20. Therefore, the hollow structure of the resonant component 11 can be cylindrical, cuboid, etc. The length of the anti-radio frequency interference device 10 can be determined according to actual needs. For example, the length of the anti-radio frequency interference device 10 can be the same as the length of the ECG electrode wire 201 of the magnetic resonance imaging device 20. In this way, the anti-radio frequency interference device 10 can completely cover the ECG electrode wire 201, which can not only avoid the influence of the radio frequency field on the ECG signal acquisition process, but also avoid the influence of the radio frequency field on the ECG signal transmission process. Alternatively, the length of the anti-radio frequency interference device 10 can be set in a certain proportion to the length of the ECG electrode wire 201 of the magnetic resonance imaging device 20. For example, if the length of the ECG electrode wire 201 is 1 meter, the length of the anti-radio frequency interference device 10 can be 0.3 meters.

[0051] It is understandable that the anti-radio frequency interference device 10 can also be a hollow structure in the shape of a cuboid, a sphere, etc. The hollow structure can be cylindrical, cuboid, etc. The size of the hollow structure can be determined according to parameters such as the length and diameter of the ECG electrode wire 201. For example, the diameter of the hollow structure is slightly larger than the diameter of the ECG electrode wire 201.

[0052] The aforementioned preset threshold can be a threshold determined based on historical experience. If the difference between the resonant frequency of the resonant component 11 and the main frequency of the magnetic resonance imaging device 20 is less than the preset threshold, it indicates that the ECG signal is not easily affected by the radio frequency field under the current conditions. If the difference between the resonant frequency of the resonant component 11 and the main frequency of the magnetic resonance imaging device 20 is greater than or equal to the preset threshold, it indicates that the ECG signal is easily affected by the radio frequency field under the current conditions.

[0053] The resonant component 11 in the radio frequency interference suppression device 10 is used to generate a resonant frequency. The resonant component 11 is composed of at least one inductor and at least one capacitor C. The inductor can be made of a conductive metal material, such as copper or aluminum. The capacitor C can be any existing type of capacitor C, such as an electrolyte capacitor C, an electrolyte chip capacitor C, a plastic film capacitor C, or a ceramic capacitor C, etc.

[0054] The resonant frequency of the resonant component 11 is determined by the main frequency of the magnetic resonance device 20, and the resonant frequency of the resonant component 11 needs to be adjusted to a preset threshold range near the main frequency of the magnetic resonance device 20. The resonant frequency generated by the resonant component 11 can be achieved by adjusting the inductance value of at least one inductor and the capacitance value of at least one capacitor C.

[0055] Figure 4This is a schematic diagram of a mouse electrocardiogram (ECG) signal. The ECG signal was acquired after the radio frequency interference (RFI) suppression device 10 was placed on the ECG electrode lines 201 of the magnetic resonance imaging (MRI) device 20. (Comparison) Figure 2 As can be seen, after the radio frequency interference suppression by the anti-radio frequency interference device 10, the ECG signal was basically unaffected by the radio frequency field, and no interference signal was observed in the ECG signal. Therefore, it is evident that the anti-radio frequency interference device 10 can effectively suppress magnetic resonance radio frequency field interference and improve the accuracy of the ECG signal.

[0056] The aforementioned radio frequency interference suppression device 10 includes a resonant component 11 with a hollow structure. The difference between the resonant frequency of the resonant component 11 and the main frequency of the magnetic resonance imaging (MRI) device 20 is less than a preset threshold. The hollow structure of the resonant component 11 allows the ECG electrode wires 201 of the MRI device 20 to pass through. The main frequency of the MRI device 20 is determined by the magnetic field strength of the MRI device 20. Because the main frequency of the resonant component 11 in the radio frequency interference suppression device 10 is close to the main frequency of the MRI device 20, and the ECG electrode wires 201 are located in the hollow structure of the resonant component 11, the resonant component 11 can suppress the interference generated by the radio frequency field generated by the MRI device 20 on the ECG signal, avoiding the influence of the radio frequency field on the ECG signal acquisition and transmission process, and improving the accuracy of the ECG signal and the quality of the MRI image.

[0057] Since the ECG electrode wire 201 of the MRI device 20 passes through the hollow structure of the resonant component 11, in the first case, the anti-radio frequency interference device 10 can be wrapped around the ECG electrode wire 201 as a whole. Regardless of whether the ECG electrode wire 201 is used during the MRI scan, the anti-radio frequency interference device 10 and the ECG electrode wire 201 are considered as a single unit. In the second case, the anti-radio frequency interference device 10 can be detachably installed on the ECG electrode wire 201. If the ECG electrode wire 201 needs to be used during the MRI scan, the anti-radio frequency interference device 10 can be disassembled, the ECG electrode wire 201 placed behind the hollow structure of the resonant component 11, and then the anti-radio frequency interference device 10 can be closed. Based on this, the anti-radio frequency interference device 10 can suppress the interference generated by the radio frequency field of the MRI device 20 on the ECG signal, avoiding interference from the radio frequency field to the ECG signal.

[0058] The second scenario described above will be explained in detail below through an example, such as... Figure 5 As shown, in the second case, the resonant component 11 includes a first resonant component 111 and a second resonant component 112, and there is a preset distance interval between the first resonant component 111 and the second resonant component 112.

[0059] Both the first resonant component 111 and the second resonant component 112 include a capacitor C and a conductive metal shell. The conductive metal shell can be equivalent to an inductor component, referred to as the inductor component L.

[0060] In this embodiment, to facilitate the disassembly and installation of the anti-radio frequency interference device 10, the resonant component 11 can be configured into two parts, namely a first resonant component 111 and a second resonant component 112. The first resonant component 111 and the second resonant component 112 can be the same size or different, as long as they meet the requirement of being detachable and can accommodate the ECG electrode wire 201 in the hollow structure.

[0061] It is understandable that the resonant component 11 can also be divided into an even number of resonant components, for example, the resonant component 11 can also include four resonant components, six resonant components, etc. Figure 6 The diagram shows the resonant component 11. As can be seen from the diagram, the resonant component 11 is cylindrical, and the hollow structure of the resonant component 11 is also cylindrical. From the cross-section of the cylinder, it can be seen that the resonant component 11 is divided into four resonant components, each of which includes a capacitor C and an inductor L.

[0062] In the closed state, there is a preset distance between the first resonant component 111 and the second resonant component 112 to prevent the equivalent circuit formed by the first resonant component 111 and the second resonant component 112 from conducting. This preset distance can be determined based on historical experience.

[0063] The aforementioned resonant component 11 includes a first resonant component 111 and a second resonant component 112, with a preset distance between them. Both the first resonant component 111 and the second resonant component 112 include a capacitor C and a conductive metal shell, which can be equivalent to an inductor component, referred to as an inductor component L. By setting two resonant components, each including a capacitor and an equivalent inductance, the difference between the resonant frequency and the main frequency of the magnetic resonance device can be made less than a preset threshold by controlling the values ​​of the capacitor and inductor.

[0064] In one embodiment, capacitor C is embedded in the middle of inductor component L, and capacitor C is connected to inductor component L by welding or bonding.

[0065] Continue to refer Figure 6As can be seen, capacitor C is embedded in the middle of inductor assembly L. The size of capacitor C remains constant for different values ​​of C; therefore, the size occupied by capacitor C in inductor assembly L is also constant. In other words, when capacitors of different C values ​​are needed, only capacitors with different C values ​​need to be placed in the corresponding positions; there is no need to change the size occupied by capacitor C in inductor assembly L.

[0066] To facilitate welding or bonding of capacitor C to inductor component L, the embedded area is sloped twice, making the welding or bonding process easier.

[0067] In addition, from Figure 6 It can also be seen that the two ends of the resonant component 11 include a plurality of hole structures 113, each hole structure 113 being used to place a fixing member; the distance between the first resonant component 111 and the second resonant component 112 is adjusted by the fixing member.

[0068] The fastener can be a threaded connection, a keyway connection, or other types. The fastener is used to fix the first resonant component 111 and the second resonant component 112, and can also be used to adjust the distance between the first resonant component 111 and the second resonant component 112.

[0069] To explain the principle of suppressing radio frequency fields by the anti-radio frequency interference device 10, Figure 7 The equivalent circuit diagram of the anti-radio frequency interference device 10 is given, where the inductor L represents Figure 6 The housing of the anti-radio frequency interference device 10, i.e., the inductor assembly L, and the capacitor C in the figure represent Figure 6 A capacitor C is embedded in the middle of the inductor component L. The inductor L and capacitor C together form a resonant circuit. By changing the inductance value of inductor L and the capacitance value of capacitor C, the resonant frequency of the equivalent circuit can be changed so that the resonant frequency of the equivalent circuit is near the main frequency of the magnetic resonance device 20 and includes a certain bandwidth, thereby filtering the interference signals generated by the radio frequency pulses of the magnetic resonance device 20.

[0070] To protect the anti-radio frequency interference device 10, a protective shell 12 can be provided on the outside of the anti-radio frequency interference device 10. In one embodiment, such as Figure 8 As shown, the anti-radio frequency interference device 10 also includes a protective shell 12, which is wrapped around the outside of the resonant component 11.

[0071] If the resonant component 11 in the anti-RF interference device 10 is a one-piece design, then the protective shell 12 can also be a one-piece design. Inlet and outlet ports for the ECG electrode wires 201 of the magnetic resonance imaging device 20 can be provided at both ends of the protective shell 12, and the size of these ports and outlets is the same as the size of the hollow structure. In this way, the ECG electrode wires 201 of the magnetic resonance imaging device 20 can pass through the hollow structure of the anti-RF interference device 10 with the protective shell 12.

[0072] If the resonant component 11 in the anti-radio frequency interference device 10 is not a single-piece design, then the protective housing 12 can be split into two housings. For example, when the resonant component 11 includes four resonant components, two resonant components are placed in the first protective housing 12, and the other two resonant components are placed in the second protective housing 12.

[0073] Taking the resonant component 11 as an example, which includes two resonant components, in one embodiment, the protective shell 12 includes a first shell 121 and a second shell 122. The first shell 121 is provided with a slot, and the second shell 122 is provided with a buckle.

[0074] When the ECG electrode wire 201 of the magnetic resonance device 20 is in the hollow structure of the resonant component 11, the latch of the second housing 122 is engaged in the slot of the first housing 121 under the action of external force.

[0075] In one embodiment, continue to refer to Figure 8 The protective shell 12 includes a first shell 121 and a second shell 122, which are fixed together by screws.

[0076] In this embodiment of the application, the first housing 121 of the protective shell 12 can be the upper housing, and the second housing 122 of the protective shell 12 can be the lower housing. (Combined with...) Figure 5 The first resonant component 111 can be disposed within the first housing 121, thus forming a first integral unit with the first housing 121. The second resonant component 112 can be disposed within the second housing 122, thus forming a second integral unit with the second housing 122.

[0077] Based on this, to ensure the safety of the magnetic resonance imaging (MRI) device 20 during the scanning process, the first housing 121 and the second housing 122 can be fixed together. The first housing 121 and the second housing 122 are fixed together using screws. Other methods of fixation are also possible.

[0078] The aforementioned protective shell 12 includes a first shell 121 and a second shell 122, which are fixed together by screws. This structure uses screws to fix the first shell 121 and the second shell 122, making it difficult to open when the first shell 121 and the second shell 122 are closed, thus ensuring the safety of the magnetic resonance scanning process.

[0079] Assuming the ECG electrode wire 201 is long enough, the anti-radio frequency interference device 10 can be positioned at any location on the ECG electrode wire 201. Since the ECG electrode wire 201 contacts the surface of the object being tested through the electrode pad 202, in order to prevent the influence of the radio frequency field on the ECG signal from the source, in one embodiment, the anti-radio frequency interference device 10 is positioned at the end of the ECG electrode wire 201 close to the electrode pad 202. In this way, the anti-radio frequency interference device 10 can prevent the influence of the radio frequency field on the ECG signal from the source, improving the accuracy of the ECG signal.

[0080] It is understandable that, in order to ensure the relative position between the anti-radio frequency interference device 10 and the ECG electrode line 201 is fixed, sealing devices can be provided at both ends of the protective shell 12 to fix the anti-radio frequency interference device 10 in the fixed area of ​​the ECG electrode line 201. This fixed area is the area close to the electrode pad 202. Alternatively, the diameter of the openings at both ends of the protective shell 12 can be set to be slightly larger than the diameter of the ECG electrode line 201, so that the relative position between the anti-radio frequency interference device 10 and the ECG electrode line 201 can be fixed through the diameter of the openings of the protective shell 12. This application embodiment does not limit the method of fixing the relative position between the anti-radio frequency interference device 10 and the ECG electrode line 201, as long as the anti-radio frequency interference device 10 is located at the end of the ECG electrode line 201 close to the electrode pad 202.

[0081] In one embodiment, the radio frequency interference suppression device 10 can be an accessory device of the magnetic resonance imaging (MRI) device 20. In another embodiment, an MRI device 20 is also provided, comprising the radio frequency interference suppression device 10, ECG electrode wires 201, and a radio frequency coil. The hollow structure of the resonant component 11 in the radio frequency interference suppression device 10 allows the ECG electrode wires 201 of the MRI device 20 to pass through. A first end of the ECG electrode wires 201 is connected to a circuit system, transmitting the ECG signal to the MRI data processing equipment via the circuit system. The second end is connected to the scanned object. This radio frequency interference suppression device 10 can suppress interference from the radio frequency field of the MRI device 20, thereby avoiding the influence of the radio frequency field on the ECG signal acquisition and transmission process, and improving the accuracy of the ECG signal and the quality of the MRI image.

[0082] In another scenario, the radio frequency interference suppression device 10 can also be a standalone device. In this case, if the magnetic resonance imaging (MRI) device 20 needs to scan areas with motion, the radio frequency interference suppression device 10 is installed at the end of the ECG electrode line 201 of the MRI device 20 near the electrode pad 202. In this way, the radio frequency interference suppression device 10 can prevent the radio frequency field from affecting the ECG signal at the source, improving the accuracy of the ECG signal.

[0083] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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 application.

[0084] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A radio frequency interference suppression device, characterized in that, The anti-radio frequency interference device (10) includes a resonant component (11) with a hollow structure, and the difference between the resonant frequency of the resonant component (11) and the main frequency of the magnetic resonance device (20) is less than a preset threshold. The hollow structure of the resonant component (11) is used for the passage of the electrocardiogram electrode wires (201) of the magnetic resonance device (20); The dominant frequency of the magnetic resonance device (20) is determined by the magnetic field strength of the magnetic resonance device (20).

2. The apparatus according to claim 1, characterized in that, The resonant component (11) includes a first resonant component (111) and a second resonant component (112), and there is a preset distance interval between the first resonant component (111) and the second resonant component (112); Both the first resonant component (111) and the second resonant component (112) include a capacitor (C) and a conductive metal shell, which can be equivalent to an inductor component, referred to as an inductor component (L).

3. The apparatus according to claim 2, characterized in that, The capacitor (C) is embedded in the middle of the inductor (L), and the capacitor (C) and the inductor (L) are connected by welding or bonding.

4. The apparatus according to claim 2, characterized in that, The resonant component (11) includes multiple hole structures (113) at both ends, and each hole structure (113) is used to place a fixing member; The distance between the first resonant component (111) and the second resonant component (112) is adjusted by the fixing member.

5. The apparatus according to any one of claims 1-4, characterized in that, The hollow structure of the resonant component (11) is cylindrical, and the diameter of the cylinder is determined according to the diameter of the electrocardiogram electrode wire (201) of the magnetic resonance device (20).

6. The apparatus according to any one of claims 1-4, characterized in that, The anti-radio frequency interference device (10) also includes a protective shell (12) which is wrapped around the outside of the resonant component (11).

7. The apparatus according to claim 6, characterized in that, The protective shell (12) includes a first shell (121) and a second shell (122), wherein the first shell (121) is provided with a slot and the second shell (122) is provided with a buckle; When the electrocardiogram electrode wire (201) of the magnetic resonance device (20) is in the hollow structure of the resonant component (11), the buckle of the second housing (122) is engaged in the slot of the first housing (121) under the action of external force.

8. The apparatus according to claim 6, characterized in that, The protective shell (12) includes a first shell (121) and a second shell (122), which are fixed together by screws.

9. The apparatus according to any one of claims 1-4, characterized in that, The anti-radio frequency interference device (10) is located at one end of the electrocardiogram electrode line (201) near the electrode plate (202).

10. A magnetic resonance imaging device, characterized in that, The magnetic resonance device (20) includes an anti-radio frequency interference device (10) as described in any one of claims 1-9, an electrocardiogram electrode wire (201), and a radio frequency coil. The hollow structure of the resonant component (11) in the anti-radio frequency interference device (10) allows the electrocardiogram electrode wire (201) of the magnetic resonance device (20) to pass through. The first end of the electrocardiogram electrode wire (201) is connected to the circuit system, through which the electrocardiogram signal is transmitted to the magnetic resonance data processing device, and the second end is connected to the scanned object.

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