Magnetic resonance radio frequency coil device and system

Abstract

The utility model provides a magnetic resonance radio frequency coil device and a magnetic resonance radio frequency coil system, which can be applied to the technical field of magnetic resonance imaging and the technical field of radio frequency communication. The device comprises a main coil used for collecting an initial magnetic resonance signal, and the initial magnetic resonance signal comprises a target magnetic resonance signal and a first noise signal; the secondary coil group comprises a plurality of secondary coils which are respectively used for collecting second noise signals; the main coil and the secondary coil group are fixed on the same base, and the plurality of secondary coils are arranged around the main coil in a preset shape.

Description

Technical Field

[0001] This utility model relates to the fields of magnetic resonance imaging technology and radio frequency communication technology, and more specifically, to a magnetic resonance radio frequency coil device and system. Background Technology

[0002] With the rapid development of magnet technology, electronic information technology and microelectronics technology, magnetic resonance imaging (MRI) technology has become increasingly sophisticated and has made significant progress. It has now become an indispensable tool in medical diagnosis, scientific research and other application fields.

[0003] In the process of realizing the concept of this utility model, it was found through research that magnetic resonance imaging in related technologies is easily affected by noise interference and has low imaging quality. Therefore, there is an urgent need for a magnetic resonance device that can improve the imaging effect. Utility Model Content

[0004] In view of this, the present invention provides a magnetic resonance radio frequency coil device and system.

[0005] One aspect of this utility model provides a magnetic resonance radio frequency coil device, comprising:

[0006] The main coil is used to acquire the initial magnetic resonance signal, which includes the target magnetic resonance signal and the first noise signal; the secondary coil group includes multiple secondary coils, which are used to acquire the second noise signal respectively; the main coil and the secondary coil group are both fixed on the same base, and the multiple secondary coils are arranged in a preset shape around the main coil.

[0007] According to an embodiment of the present invention, the preset shape includes an equilateral triangle, and multiple secondary coils are arranged symmetrically in an equilateral triangle around the main coil.

[0008] According to an embodiment of this utility model, the side length of the equilateral triangle is 20cm to 45cm.

[0009] According to an embodiment of the present invention, the main coil and multiple secondary coils have the same structure and are all made by winding wires on a 3D printed bracket, wherein the shape of the 3D printed bracket includes a cylinder.

[0010] According to an embodiment of this utility model, the diameter of the main coil is 12cm to 25cm, and the diameters of the multiple secondary coils are all 2cm to 10cm.

[0011] According to an embodiment of the present invention, the preset shape also includes a square.

[0012] According to an embodiment of this utility model, multiple secondary coils and a primary coil are fixed to the base by non-metallic parts.

[0013] Another aspect of this utility model provides a magnetic resonance radio frequency coil system, comprising:

[0014] The aforementioned apparatus, and the processing module, are used to process the received initial magnetic resonance signal and the second noise signal to obtain the target magnetic resonance signal.

[0015] According to an embodiment of the present invention, the processing module includes a magnetic resonance spectrometer, used to remove a first noise signal from an initial magnetic resonance signal based on a second noise signal.

[0016] According to an embodiment of the present invention, the processing module further includes an amplifier for amplifying the initial magnetic resonance signal.

[0017] According to an embodiment of this utility model, by fixing both the main coil and the secondary coil group on the same base, and arranging multiple secondary coils in a preset shape around the main coil, the multiple secondary coils receive a second noise signal. The second noise signal can cancel out the first noise signal in the initial magnetic resonance signal received by the main coil, effectively reducing noise and improving the signal-to-noise ratio of the image. This is beneficial for obtaining clearer images in applications such as medical diagnosis. At the same time, since the noise is reduced to a certain extent, the requirements for electromagnetic shielding performance can be relaxed, and unshielded imaging can be achieved under certain conditions. Attached Figure Description

[0018] The above and other objects, features and advantages of the present invention will become clearer from the following description of embodiments of the present invention with reference to the accompanying drawings, in which:

[0019] Figure 1A A schematic top view of a magnetic resonance radio frequency coil device according to an embodiment of the present invention is shown.

[0020] Figure 1B A schematic side view of a magnetic resonance radio frequency coil device according to an embodiment of the present invention is shown.

[0021] Figure 2 A schematic block diagram of a magnetic resonance system according to an embodiment of the present invention is shown.

[0022] Figure 3 The schematic diagram illustrates a signal processing flow in a magnetic resonance system according to an embodiment of the present invention. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0024] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0025] All terms used herein, including technical and scientific terms, have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0026] When using expressions such as "at least one of A, B, and C," the meaning should generally be interpreted according to the understanding of someone skilled in the art. For example, "a system having at least one of A, B, and C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C. Similarly, when using expressions such as "at least one of A, B, or C," the meaning should generally be interpreted according to the understanding of someone skilled in the art. For example, "a system having at least one of A, B, or C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C.

[0027] It should also be noted that the directional terms mentioned in the embodiments, such as "up," "down," "front," "back," "left," and "right," are only for reference in the accompanying drawings and are not intended to limit the scope of protection of this utility model. Throughout the drawings, the same elements are represented by the same or similar reference numerals. Conventional structures or constructions will be omitted where they may cause confusion in understanding this utility model.

[0028] In realizing the concept of this utility model, research revealed that magnetic resonance imaging (MRI) is a high-precision tomographic imaging technique with significant advantages such as requiring no ionizing radiation and no contrast agent injection, thus posing no harm to the human body. Furthermore, MRI examinations can precisely visualize tissue structures, making it particularly suitable for imaging tissues with high water content and enabling the early detection of minute lesions. For example, low-magnetic-field-strength MRI systems offer advantages such as low cost, small footprint, and low maintenance requirements.

[0029] However, due to the low signal intensity of low-field magnetic resonance (MRI), the signal-to-noise ratio is insufficient, making it difficult to achieve the image quality of high-field MRI systems. The performance of the radio frequency (RF) coil, a key component of the MRI system, directly determines the imaging quality. In related technologies, the RF receiving coil does not implement active noise reduction and is typically only used to receive MRI signals. For low-field MRI systems, since the intensity of the MRI signal is positively correlated with the magnetic field strength, the low signal intensity makes imaging susceptible to noise interference, making it difficult to obtain clear images with a high signal-to-noise ratio. This also negatively impacts medical diagnostic results to some extent. Furthermore, traditional MRI systems have high requirements for overall electromagnetic shielding performance, resulting in higher manufacturing and maintenance demands.

[0030] In view of this, the present invention provides a magnetic resonance radio frequency coil device, comprising:

[0031] The main coil is used to acquire the initial magnetic resonance signal, which includes the target magnetic resonance signal and the first noise signal; the secondary coil group includes multiple secondary coils, which are used to acquire the second noise signal respectively; the main coil and the secondary coil group are both fixed on the same base, and the multiple secondary coils are arranged in a preset shape around the main coil.

[0032] Figure 1A A schematic top view of a magnetic resonance radio frequency coil device according to an embodiment of the present invention is shown.

[0033] like Figure 1A As shown, the device 100 includes a main coil 110, a secondary coil group 120, and a base 130.

[0034] According to an embodiment of this utility model, the secondary coil includes a first secondary coil 121, a second secondary coil 122, and a third secondary coil 123, with the object to be imaged 140 located within the main coil 110. The multiple secondary coils are arranged in a predetermined shape around the main coil 110, ensuring they do not obstruct the object to be imaged, thus guaranteeing the normal operation of the main coil 110. Both the main coil 110 and the secondary coil group 120 are fixed to the base 130, which avoids instability in noise reduction performance caused by changes in relative position. The multiple secondary coils also improve the stability and reliability of noise reduction.

[0035] The initial magnetic resonance signal is obtained by the main coil from the object to be imaged, including the target magnetic resonance signal used for imaging and the first noise signal obtained by interference from the environment, etc. In order to cancel the first noise signal, a preset shape of multiple secondary coils is determined through experiments to receive the second noise signal that does not contain the magnetic resonance signal.

[0036] According to an embodiment of the present invention, the correlation between the first noise signal and the second noise signal in the frequency domain must be greater than a preset threshold of 75%, that is, the average degree of matching of the spectral values ​​corresponding to all frequency points in the spectrum is greater than 75%.

[0037] It should be noted that, Figure 1A The number of main and secondary coils shown is merely illustrative. Depending on the implementation requirements, any number of main and secondary coils can be used.

[0038] According to an embodiment of this utility model, by fixing both the main coil and the secondary coil group on the same base, and arranging multiple secondary coils in a preset shape around the main coil, the multiple secondary coils receive a second noise signal. In subsequent processing, the second noise signal can cancel out the first noise signal in the initial magnetic resonance signal received by the main coil, effectively reducing noise and improving the signal-to-noise ratio of the image. This is beneficial for obtaining clearer images in applications such as medical diagnosis. At the same time, since the noise is reduced to a certain extent, the requirements for electromagnetic shielding performance can be relaxed, and unshielded imaging can be achieved under certain conditions.

[0039] According to an embodiment of the present invention, the preset shape includes an equilateral triangle, and multiple secondary coils are arranged symmetrically in an equilateral triangle around the main coil.

[0040] According to an embodiment of the present invention, when the preset shape is an equilateral triangle, the three secondary coils can be located at the three vertices of the equilateral triangle centered on the main coil, or at the midpoints of each side of the equilateral triangle. Therefore, it is sufficient to ensure that the distance between each secondary coil and the main coil is equal, so that the noise reduction effect is relatively uniform and signal strength changes or phase distortion caused by distance differences are avoided.

[0041] According to an embodiment of this utility model, an equilateral triangle is selected as the preset shape to ensure that multiple secondary coils uniformly acquire the second noise signal. This cancels the first noise signal of the main coil without affecting the acquisition by the main coil, which is beneficial to improving the quality of magnetic resonance imaging.

[0042] According to an embodiment of this utility model, the side length of the equilateral triangle is 20cm to 45cm.

[0043] According to the embodiments of this utility model, correctly selecting the side length of the preset equilateral triangle can prevent signal attenuation while ensuring that the signal acquisition of the main and auxiliary coils does not interfere with each other.

[0044] According to an embodiment of the present invention, the main coil and multiple secondary coils have the same structure and are all made by winding wires on a 3D printed bracket, wherein the shape of the 3D printed bracket includes a cylinder.

[0045] Figure 1BA schematic side view of a magnetic resonance radio frequency coil device according to an embodiment of the present invention is shown.

[0046] like Figure 1B As shown, this side view is... Figure 1A The top view corresponds to this, and will not be described in detail here. In addition, the main coil 110 includes a 3D printed support 111 and wires 112.

[0047] According to embodiments of this utility model, the material, number of turns, diameter of the wire, and shape of the 3D printed bracket can be adjusted according to actual needs.

[0048] According to the embodiments of this utility model, the main and auxiliary coils with the same structure can ensure that they are consistent in electromagnetic characteristics, so that the second noise signal and the first noise signal can achieve better correlation matching and reduce differences. The cylindrical 3D printed bracket makes the wires evenly wound, ensuring the stability of signal acquisition.

[0049] According to an embodiment of this utility model, the diameter of the main coil is 12cm to 25cm, and the diameters of the multiple secondary coils are all 2cm to 10cm.

[0050] According to an embodiment of this utility model, since the secondary coil is only used to collect the second noise signal, its size should be kept smaller than that of the primary coil.

[0051] For example, the length of the 3D printing support corresponding to the main coil is 15 cm to 35 cm, and the length of the 3D printing support corresponding to the secondary coil is 3 cm to 12 cm.

[0052] According to an embodiment of the present invention, the preset shape also includes a square.

[0053] According to an embodiment of the present invention, when the sub-coil group includes four sub-coils, a preset shape of square or rhombus can be selected, so that multiple sub-coils are located at the vertices of the square or rhombus centered on the main coil, ensuring that each sub-coil is equidistant from the main coil.

[0054] According to an embodiment of the present invention, when the secondary coil group includes two secondary coils, the two secondary coils should be located at both ends of a line segment with the main coil as the midpoint.

[0055] According to embodiments of this utility model, in different situations, a sub-coil group with more than 4 sub-coils can also be selected, but in order to save space and system maintenance costs, the number of sub-coils should not be too many.

[0056] According to an embodiment of this utility model, multiple secondary coils and a primary coil are fixed to the base by non-metallic parts.

[0057] According to embodiments of this utility model, the materials of non-metallic parts include plastics or other composite materials. In addition to having excellent load-bearing capacity, the stress resistance of the materials should also be tested to ensure that the parts will not crack, deform, or shift during the operation of the main and auxiliary coils.

[0058] According to embodiments of this utility model, the vertical height of each secondary coil and the primary coil relative to the base can also be controlled by the shape of the non-metallic parts to ensure that the first noise signal and the second noise signal can achieve a better cancellation effect.

[0059] Figure 2 A schematic block diagram of a magnetic resonance system according to an embodiment of the present invention is shown.

[0060] like Figure 2 As shown, system 200 includes magnetic resonance radio frequency coil device 210 and processing module 220.

[0061] According to an embodiment of the present invention, a processing module is used to process the received initial magnetic resonance signal and second noise signal to obtain a target magnetic resonance signal.

[0062] According to embodiments of this utility model, the magnetic resonance system, through the coordinated operation of the magnetic resonance radio frequency coil device and the processing module, achieves the separation of a pure target magnetic resonance signal from the initial magnetic resonance signal, effectively removing noise interference, thereby improving imaging quality and enhancing the system's adaptability and reliability. It can be applied to a variety of practical application scenarios, especially in the field of low-field magnetic resonance technology where signal strength is low and imaging is highly susceptible to noise interference.

[0063] According to an embodiment of the present invention, the processing module includes a magnetic resonance spectrometer, used to remove a first noise signal from an initial magnetic resonance signal based on a second noise signal.

[0064] According to an embodiment of the present invention, the magnetic resonance spectrometer can use a noise reduction algorithm to process the initial magnetic resonance signal of the main coil and the second noise signal of the secondary coil in real time, and perform a signal subtraction operation to effectively cancel the first noise signal in the initial magnetic resonance signal using the second noise signal.

[0065] According to an embodiment of the present invention, the processing module further includes an amplifier for amplifying the initial magnetic resonance signal.

[0066] According to an embodiment of the present invention, a preamplifier can be used to preamplify the initial magnetic resonance signal before the signal enters the magnetic resonance spectrometer.

[0067] To better understand how a magnetic resonance imaging (MRI) system processes various signals, the following will be explained... Figure 3 Further explanation is needed.

[0068] Figure 3 The schematic diagram illustrates a signal processing flow in a magnetic resonance system according to an embodiment of the present invention.

[0069] like Figure 3 As shown, the main coil 110 receives the initial magnetic resonance signal, and the first sub-coil 121, the second sub-coil 122 and the third sub-coil 123 in the sub-coil group 120 all receive the second noise signal. The second noise signal and the initial magnetic resonance signal amplified by the amplifier 310 are sent to the magnetic resonance spectrometer 320 and subtracted to use the second noise signal to cancel the first noise signal in the initial magnetic resonance signal.

[0070] The embodiments of the present invention have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. The scope of the present invention is defined by the appended claims and their equivalents. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of the present invention, and all such substitutions and modifications should fall within the scope of the present invention.

Claims

1. A magnetic resonance radio frequency coil arrangement, characterized by, include: The main coil is used to acquire the initial magnetic resonance signal, wherein the initial magnetic resonance signal includes the target magnetic resonance signal and the first noise signal; The secondary coil group includes multiple secondary coils, each used to acquire the second noise signal; The main coil and the secondary coil group are both fixed on the same base, and the multiple secondary coils are arranged in a preset shape around the main coil.

2. The apparatus of claim 1, wherein, The preset shape includes an equilateral triangle, and the plurality of secondary coils are arranged symmetrically around the main coil in the shape of the equilateral triangle.

3. The apparatus of claim 2, wherein, The side length of the equilateral triangle is 20cm to 45cm.

4. The apparatus of claim 1, wherein, The main coil and the plurality of secondary coils have the same structure and are all made by winding wires on a 3D printed bracket, wherein the 3D printed bracket is cylindrical in shape.

5. The apparatus of claim 4, wherein, The diameter of the main coil is 12cm to 25cm, and the diameter of each of the multiple secondary coils is 2cm to 10cm.

6. The apparatus of claim 1, wherein, The preset shape also includes a square.

7. The apparatus of claim 1, wherein, The plurality of secondary coils and the main coil are all fixed to the base by non-metallic parts.

8. A magnetic resonance system, characterized by include: The apparatus as described in any one of claims 1 to 7; as well as The processing module is used to process the received initial magnetic resonance signal and the second noise signal to obtain the target magnetic resonance signal.

9. The system of claim 8, wherein, The processing module includes: A magnetic resonance spectrometer is used to remove a first noise signal from the initial magnetic resonance signal based on the second noise signal.

10. The system of claim 9, wherein, The processing module further includes: An amplifier is used to amplify the initial magnetic resonance signal.

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