Magnetic resonance coil assembly and magnetic resonance apparatus

Abstract

This specification provides a magnetic resonance coil assembly and a magnetic resonance device. The magnetic resonance coil assembly includes a first coil array and a second coil array. When the first coil array and the second coil array are configured to be arranged opposite each other for detecting magnetic resonance signals, the projections of adjacent coils in the first coil array and the coils in the second coil array onto a plane perpendicular to a first direction do not completely overlap.

Description

Technical Field

[0001] This specification relates to the field of magnetic resonance technology, and in particular to a magnetic resonance coil assembly and a magnetic resonance device. Background Technology

[0002] Magnetic Resonance Imaging (MRI) is a widely used medical scanning imaging technique. When scanning biological organisms such as humans or animals, coils need to cover both the upper and lower portions of the object being scanned to achieve full coverage, a relatively uniform signal-to-noise ratio, and good vertical acceleration performance. However, coupling exists between the upper and lower coil arrays; the stronger the coupling, the worse the signal-to-noise ratio, and it often disrupts image uniformity. Currently, the upper and lower coil arrays used for biological MRI scans typically consist of ring elements, with the circuit isolated only by preamplifier decoupling, resulting in ineffective coupling removal.

[0003] Therefore, it is desirable to provide a magnetic resonance coil assembly and a magnetic resonance device to improve the decoupling effect of the upper and lower coil arrays in magnetic resonance scanning. Summary of the Invention

[0004] One embodiment of this specification provides a magnetic resonance coil assembly. The magnetic resonance coil assembly includes a first coil array and a second coil array. When the first coil array and the second coil array are configured to be positioned opposite each other along a first direction for detecting magnetic resonance signals, the projections of adjacent coils in the first coil array and the second coil array onto a plane perpendicular to the first direction do not completely overlap.

[0005] In some embodiments, the projections of the first coil array and the second coil array onto the plane may be symmetrical along a first axis and / or a second axis, the first axis being parallel to a second direction, the second axis being perpendicular to the second direction, and the second direction being parallel to the coil arrangement direction in the first coil array or the second coil array.

[0006] In some embodiments, the projections of the center of the first coil array and the center of the second coil array onto a plane perpendicular to the first direction may coincide.

[0007] In some embodiments, the coil types in the first coil array and the second coil array may include at least two.

[0008] In some embodiments, the at least two coil types may include a toroidal coil and a quadrature coil.

[0009] In some embodiments, the first coil array may include two loop coils and one quadrature coil, and the second coil array may include one loop coil and two quadrature coils, or the second coil array may include two quadrature coils.

[0010] In some embodiments, the number of coils of the same type in the first coil array and the second coil array may be different.

[0011] In some embodiments, coils of the same type in the first coil array and the second coil array may be arranged alternately.

[0012] In some embodiments, the center positions of the same type of coils in the first coil array and the second coil array may be different.

[0013] In some embodiments, the magnetic resonance coil assembly may further include a first support and a second support, wherein the first coil array is disposed on the surface of the first support and the second coil array is disposed on the surface of the second support.

[0014] One embodiment of this specification provides a magnetic resonance device, the device including the magnetic resonance coil assembly.

[0015] One embodiment of this specification provides a magnetic resonance scanning method, which uses the magnetic resonance coil assembly to receive radio frequency signals.

[0016] Currently, the upper and lower coil arrays used in animal MRI are composed of ring elements, and the circuits are isolated only through preamplifier decoupling. Apart from preamplifier decoupling, no other design is used to reduce the coupling between the upper and lower coil arrays. The magnetic resonance coil assemblies provided in some embodiments of this specification achieve decoupling by utilizing the orthogonality of the upper and lower coil arrays through the configuration of the upper and lower coil arrays (e.g., arrangement, coil type, number of coils, etc.). This enables more effective coupling control, ensures the signal-to-noise ratio and uniformity of the coils, and delivers excellent imaging acceleration performance, improving the stability and output reliability of the magnetic resonance equipment. By independently configuring the coils, each coil can independently receive signals in its respective direction, improving signal reception efficiency, increasing the overall signal-to-noise ratio, and thus improving the speed of magnetic resonance imaging. Attached Figure Description

[0017] This specification will be further described by way of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting; in these embodiments, the same reference numerals denote the same structures, wherein:

[0018] Figure 1These are schematic diagrams illustrating application scenarios of exemplary magnetic resonance systems according to some embodiments of this specification;

[0019] Figure 2A , Figure 2B and Figure 2C This is a schematic diagram of an exemplary magnetic resonance coil assembly according to some embodiments of this specification;

[0020] Figure 3 This is a schematic diagram of an exemplary magnetic resonance coil assembly according to some embodiments of this specification;

[0021] Figure 4 This is a schematic diagram of an exemplary magnetic resonance coil assembly according to some embodiments of this specification;

[0022] Figure 5 This is a schematic diagram of an exemplary magnetic resonance coil assembly according to some embodiments of this specification;

[0023] Figure 6 This is a schematic diagram of an exemplary magnetic resonance coil assembly according to some embodiments of this specification. Detailed Implementation

[0024] To more clearly illustrate the technical solutions of the embodiments in this specification, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this specification. For those skilled in the art, these drawings can be applied to other similar scenarios without creative effort. Unless obvious from the context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.

[0025] It should be understood that the terms “system,” “device,” “unit,” and / or “module” used herein are one way to distinguish different components, elements, parts, sections, or assemblies at different levels. However, if other terms can achieve the same purpose, they may be replaced by other expressions.

[0026] As indicated in this specification and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" do not specifically refer to the singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0027] Flowcharts are used in this specification to illustrate the operations performed by the system according to embodiments of this specification. It should be understood that the preceding or following operations are not necessarily performed in exact order. Instead, the steps can be processed in reverse order or simultaneously. Furthermore, other operations can be added to these processes, or one or more steps can be removed from them.

[0028] Figure 1 These are schematic diagrams illustrating application scenarios of exemplary magnetic resonance systems according to some embodiments of this specification. For example... Figure 1 As shown, in some embodiments, the magnetic resonance system 100 may include a medical imaging device 110, a processing device 120, a storage device 130, a terminal 140, and a network 150.

[0029] Medical imaging device 110 refers to a medical apparatus that uses different media to reproduce images of the internal structures of the human body. In some embodiments, medical imaging device 110 can be any medical device that uses magnetic resonance imaging technology, such as a single-modal magnetic resonance (MR) scanner or a multimodal MR scanner (e.g., positron emission tomography-magnetic resonance (PET-MR), computed tomography-magnetic resonance (CT-MR), etc.). MR scanners can scan objects located within their detection area and generate magnetic resonance signals associated with the objects. In this application, the terms "object" and "object" are used interchangeably. By way of example only, an object can include a patient, an artificial object (e.g., a phantom), an animal, etc. For example, an object can include a specific part of an animal and a phantom of that part. For example, the object may include the head, brain, neck, body, shoulders, arms, chest, heart, stomach, blood vessels, soft tissue, knees, feet, etc., of an animal, a phantom of the above parts, or any combination thereof. In some embodiments, the MR scanner may be an open-aperture scanner. In this application, Figure 1 The X-axis, Y-axis, and Z-axis shown can form an orthogonal coordinate system. Figure 1 The X-axis in the diagram represents the left-right direction, the Y-axis represents the up-down direction, and the Z-axis is the axial direction of the scanning cavity (or scanning aperture) of the MR scanner. Figure 1 As shown, the positive X direction along the X-axis can be the direction from the right to the left of the MR scanner as seen from the front of the MR scanner. Figure 1 The positive Z-direction along the Z-axis shown can refer to the direction in which the object moves out of the scanning cavity of the MR scanner. The Z-direction is parallel to the axial direction of the MR scanner. Figure 1The positive Y-direction along the Y-axis shown can be the direction from the bottom to the top of the MR scanner.

[0030] MRI scanners may include magnetic field systems, radio frequency (RF) systems, etc.

[0031] A magnetic field system may include a main magnet (e.g., a resistive magnet, a superconducting magnet, etc.), gradient coils, etc. The main magnet can be used to generate a first magnetic field (or main magnetic field), which can be applied to an object exposed within the field (also called the object). The gradient coils can be located within the main magnet. The gradient coils can generate a second magnetic field (or gradient field). The second magnetic field can be superimposed on the main field generated by the main magnet and distort the main field, so that the magnetic orientation of the object's protons varies according to their positions within the gradient field, thereby encoding spatial information into an MR signal generated from the region of the image object.

[0032] A radio frequency (RF) system may include an RF transmitting unit, an RF receiving unit, and an RF coil assembly. The RF transmitting unit, under the control of the RF controller, provides the various RF pulses required for the scanning sequence. The RF receiving unit receives the magnetic resonance signals generated by the human body and, after a series of processing steps including amplification, mixing, filtering, detection, and A / D conversion, sends them to the data acquisition unit.

[0033] The radio frequency (RF) coil assembly (also referred to as a magnetic resonance (MR) coil assembly) may include an RF receiving coil and an RF transmitting coil. The RF transmitting coil receives an RF signal from the RF transmitting unit to excite the nuclear spin. The RF receiving coil is used to receive MR signals (e.g., echoes). After excitation, the MR signal generated by the object can be sensed by the RF receiving coil. The specific structure of the RF receiving coil may be as described in other embodiments of the present invention, such as... Figure 2A , Figure 2B , Figure 2C and Figures 3-6 The magnetic resonance coil assembly shown.

[0034] In some embodiments, the gradient coil and radio frequency coil assembly may be circumferentially positioned relative to the object. Those skilled in the art will understand that the main magnet, gradient coil, and radio frequency coil assembly may be arranged around the object in various configurations.

[0035] The medical imaging device 110 described above is for illustrative purposes only and is not intended to limit its scope. Further description of the radio frequency coil can be found in the magnetic resonance coil assemblies shown in some embodiments of this specification. In some embodiments, the medical imaging device 110 can exchange data and / or information via network 150 or directly with other components in the magnetic resonance system 100 (e.g., processing device 120, storage device 130, terminal 140).

[0036] Processing device 120 can process data and / or information obtained from other devices or system components. In some embodiments, processing device 120 can perform the magnetic resonance scanning method shown in some embodiments of this specification using medical imaging device 110, wherein the method uses a magnetic resonance coil assembly as shown in some embodiments of this specification to transmit and / or receive radio frequency signals. In some embodiments, processing device 120 may include one or more sub-processing devices (e.g., a single-core processing device or a multi-core multi-chip processing device).

[0037] Storage device 130 can store data or information generated by other devices. In some embodiments, storage device 130 can store data and / or information acquired by medical imaging device 110, such as scan data. In some embodiments, storage device 130 can store data and / or information processed by processing device 120, such as reconstructed images. Storage device 130 may include one or more storage components, each of which may be a separate device or part of another device. Storage device can be local or implemented via the cloud.

[0038] Terminal 140 can control the operation of medical imaging equipment 110. Doctors can issue operating instructions to medical imaging equipment 110 through terminal 140 to cause it to perform specified operations, such as scanning and imaging a living organism (e.g., a human body, animal body, etc.). In some embodiments, terminal 140 can instruct processing device 120 to perform magnetic resonance scanning methods as shown in some embodiments of this specification. In some embodiments, terminal 140 can be one or any combination of mobile device 140-1, tablet computer 140-2, laptop computer 140-3, desktop computer, and other devices with input and / or output functions.

[0039] Network 150 can connect the various components of the system and / or connect the system to external resources. Network 150 enables communication between the components and with other parts outside the system, facilitating the exchange of data and / or information. In some embodiments, one or more components of the magnetic resonance system 100 (e.g., medical imaging equipment 110, processing equipment 120, storage device 130, terminal 140) can send data and / or information to other components via network 150. In some embodiments, network 150 can be any one or more of a wired network or a wireless network.

[0040] It should be noted that the above description is provided for illustrative purposes only and is not intended to limit the scope of this specification. Various changes and modifications can be made by those skilled in the art based on the content of this specification. Features, structures, methods, and other features of the exemplary embodiments described herein can be combined in various ways to obtain other and / or alternative exemplary embodiments. For example, the processing device 120 may be based on a cloud computing platform, such as a public cloud, private cloud, community cloud, and hybrid cloud. However, these changes and modifications will not depart from the scope of this specification.

[0041] Figure 2A , Figure 2B and Figure 2C This is a schematic diagram of an exemplary magnetic resonance coil assembly according to some embodiments of this specification. Figure 2A As shown, the magnetic resonance coil assembly 200 includes a first coil array 210 and a second coil array 220. It should be noted that... Figure 2A The fact that the shape of the first coil array 210 and the second coil array 220 are the same or similar is merely illustrative. The specific shapes of the first coil array 210 and the second coil array 220 can be found in other embodiments of the specification.

[0042] The magnetic resonance coil assembly 200 is a component in a magnetic resonance device (e.g., medical imaging equipment 110) that receives radio frequency signals. The first coil array 210 includes one or more coils arranged in a preset rule to form the first coil array 210 (e.g., first coil array 310, first coil array 410, first coil array 510, first coil array 610); the second coil array 220 includes one or more coils arranged in a preset rule to form the second coil array 220 (e.g., second coil array 320, second coil array 420, second coil array 520, second coil array 620).

[0043] The first coil array 210 and the second coil array 220 can be configured to be arranged opposite to each other along a first direction 230 (e.g., stacked, etc.), and an accommodating space can be formed between the first coil array 210 and the second coil array 220 after they are arranged opposite to each other (e.g., such as...). Figure 2B The cylindrical receiving space between the first coil array 210 and the second coil array 220 (shown in the diagram) is used to accommodate the scanning object. The first direction 230 is perpendicular to the plane containing either the first coil array 210 or the second coil array 220.

[0044] It should be noted that, Figure 2AThe first coil array 210 and the second coil array 220 in the diagram are both planar, used only as examples and not as a limitation on their shapes. The shape of either the first coil array 210 or the second coil array 220 can be a curved surface, a plane, etc. Taking the first coil array 210 as an example, when the first coil array 210 is a symmetrical curved surface, the plane containing the first coil array 210 can be a tangent plane at the center 215 of the first coil array 210; when the first coil array 210 is a plane, the plane containing the first coil array 210 is simply the plane in which the first coil array 210 is located. The plane containing the second coil array 220 is similar to the plane containing the first coil array 210, and will not be described further here. In some embodiments, the first direction 230 can be the straight line connecting the center 215 of the first coil array 210 and the center 225 of the second coil array 220.

[0045] In some embodiments, the first direction 230 may be perpendicular to the intermediate plane 240 between the first coil array 210 and the second coil array 220. For example, as Figure 2A As shown, the intermediate plane 240 can be a plane parallel to the plane where the first coil array 210 is located and the plane where the second coil array 220 is located, and is equidistant from the plane where the first coil array 210 is located and the plane where the second coil array 220 is located. The intermediate plane 240 passes through the midpoint 245 of the line connecting the center 215 of the first coil array 210 and the center 225 of the second coil array 220, and is perpendicular to the first direction 230.

[0046] In some embodiments, the projections of the center 215 of the first coil array 210 and the center 225 of the second coil array 220 onto a plane perpendicular to the first direction 230 can coincide. For example, as Figure 2A As shown, the projections of the center 215 of the first coil array 210 and the center 225 of the second coil array 220 onto the plane 240 perpendicular to the first direction 230 are both point 245.

[0047] like Figure 1 and Figure 2AAs shown in the coordinate system, in some embodiments, when the first coil array 210 and the second coil array 220 are arranged opposite each other along the first direction 230, the plane containing the first coil array 210 and the plane containing the second coil array 220 are approximately parallel. Therefore, the intermediate plane can be a plane composed of the X-axis and Z-axis in a three-dimensional spatial coordinate system (with the origin at point O), and the first direction 230 is the Y-axis perpendicular to this plane. The first coil array 210 and the second coil array 220 are arranged opposite each other along the first direction 230. Along the first direction 230, the first coil array 210 is above the second coil array 220 and can be referred to as the upper coil array, while the second coil array 220 is below the first coil array 210 and can be referred to as the lower coil array. In some embodiments, the positions of the first coil array 210 and the second coil array 220 can be interchanged. For example, the first coil array 210 can be below and the second coil array 220 can be above, i.e., the lower coil array is the first coil array 210, and the upper coil array is the second coil array 220.

[0048] In some embodiments, the intermediate plane 240 can be other surfaces in a three-dimensional spatial coordinate system, such as a plane composed of the Y-axis and Z-axis. In this case, the first direction 230 is a direction perpendicular to this plane. As an example only, if the plane containing the first coil array 210 and the second coil array 220 is a plane composed of the Y-axis and Z-axis, then the first direction 230 is the X-axis.

[0049] In some embodiments, when the magnetic resonance coil assembly 200 is used for MR scanning, the first coil array 210 and the second coil array 220 can be placed along a first direction 230 on both sides of the scanned object (e.g., left and right sides, or top and bottom sides). Figure 1 As shown, when the object to be scanned lies flat on the scanning bed, the first coil array 210 and the second coil array 220 can be placed along the left and right sides of the object, with the intermediate plane 240 being a plane formed by the Y-axis and Z-axis, and the first direction 230 being parallel to the X-axis direction; the first coil array 210 and the second coil array 220 can also be placed along the top and bottom sides of the object, with the intermediate plane 240 being a plane formed by the X-axis and Z-axis, and the first direction 230 being parallel to the Y-axis direction. As described herein, the top and bottom sides of the object can be the front and back sides of the object; the front and back sides of the object can be the head and feet sides of the object; the left and right sides of the object can be the left and right sides of the object's body (e.g., the left and right feet sides).

[0050] In the projections of the coils in the first coil array 210 and the coils in the second coil array 220 onto a plane perpendicular to the first direction 230, the projections of adjacent coils do not completely overlap. As described herein, adjacent coil projections refer to two coils whose projections overlap or have no other coil projections between them; such two coils are considered adjacent coils. For example, as... Figure 3 As shown, the projections of the two loop coils in the first coil array 310 can respectively overlap with the projections of the two orthogonal coils in the second coil array 320, so any loop coil and any orthogonal coil are adjacent coils. For example, if the two loop coils in the first coil array 310 partially overlap with the orthogonal coils in the first coil array 310, and the two loop coils also overlap, then the two loop coils are adjacent coils, and any loop coil and an orthogonal coil are adjacent coils.

[0051] Adjacent coils in the projections of two adjacent coils can be coils of different types or coils of the same type. For example, two ring coils in the first coil array 310 partially overlap, and any one ring coil partially overlaps with an orthogonal coil.

[0052] The first coil array 210 may include one or more first coils, and the second coil array 220 may include one or more second coils.

[0053] In some embodiments, the projections of two adjacent coils in the projections of the coils in the first coil array 210 and the coils in the second coil array 220 onto a plane perpendicular to the first direction 230 may include the first coil projection and the second coil projection. In other words, the projections of any coil in the first coil array 210 and any coil in the second coil array 220 onto the plane perpendicular to the first direction 230 can only partially overlap or not overlap, but cannot completely overlap, thereby reducing the coupling caused by the close distance between the coils in the first coil array 210 and the second coil array 220 when they are arranged relative to each other.

[0054] In some embodiments, the projections of two adjacent coils in the first coil array 210 and the second coil array 220 onto a plane perpendicular to the first direction 230 may include two adjacent first coil projections. In other words, any adjacent coils in the first coil array 210 can only partially overlap, not completely overlap.

[0055] In some embodiments, the projections of two adjacent coils in the first coil array 210 and the second coil array 220 onto a plane perpendicular to the first direction 230 may include two adjacent second coil projections. In other words, any adjacent coils in the second coil array 220 can only partially overlap, not completely overlap.

[0056] In some embodiments, the projections of two adjacent coils in the projections of the coils in the first coil array 210 and the coils in the second coil array 220 onto a plane perpendicular to the first direction 230 may include two adjacent first coil projections, two adjacent second coil projections, and one first coil projection and one second coil projection.

[0057] In some embodiments, the projections of the first coil array 210 and the second coil array 220 onto a plane perpendicular to the first direction 230 after they are arranged opposite each other along the first direction do not completely overlap. This incomplete overlap refers to a partial overlap of the overall projections of the first coil array 210 and the second coil array 220. If the projections of the centers of the first coil array 210 and the second coil array 220 onto the plane overlap after they are arranged opposite each other along the first direction, then the shapes of the boundary forming regions of the first coil array 210 and the second coil array 220 are different.

[0058] In the projections of the coils in the first coil array 210 and the coils in the second coil array 220 onto a plane perpendicular to the first direction 230, the projections of any two adjacent coils do not completely overlap; only partially overlapping projection areas exist. By ensuring that the projections of adjacent coils in the upper and lower coil arrays do not completely overlap, the mutual inductance between adjacent coils in the upper and lower coil arrays is canceled when the upper and lower coil arrays are close together. When the coils partially overlap, the mutual inductance between the coils can be canceled out through appropriate geometric design, so that the signal of one coil will not significantly affect adjacent coils, thereby reducing the coupling between coils and improving the signal-to-noise ratio.

[0059] In some embodiments, after the first coil array 210 and the second coil array 220 are arranged opposite each other along a first direction, their projections onto a plane perpendicular to the first direction 230 can be symmetrical along a first axis. The first axis is parallel to a second direction and passes through the center 215 of the first coil array 210 or the center 225 of the second coil array 220. The second direction can be parallel to the coil arrangement direction in the first coil array 210 or the second coil array 220. Figure 2A As shown, the second direction can be parallel to the X-axis or the Z-axis. For example, as... Figure 3As shown, the coil arrangement direction 330 in the first coil array 310 or the second coil array 320 is perpendicular to the first direction (the first direction is perpendicular to the plane of the paper), and the projections of the first coil array 310 and the second coil array 320 onto the plane perpendicular to the first direction are symmetrical along the second direction 330. By using this configuration of upper and lower coil arrays, decoupling can be achieved, thereby improving the signal-to-noise ratio and image quality.

[0060] In some embodiments, after the first coil array 210 and the second coil array 220 are arranged opposite each other along the first direction, their projections on the plane perpendicular to the first direction 230 can be symmetrical along the second axis, which is perpendicular to the second direction and perpendicular to the first direction, and passes through the center of the first coil array 210 or the second coil array 220.

[0061] In some embodiments, after the first coil array 210 and the second coil array 220 are arranged opposite each other along the first direction, their projections on the plane perpendicular to the first direction 230 can be symmetrical along both the first axis and the second axis.

[0062] In some embodiments, the coils in the first coil array 210 are symmetrical along a first axis and / or a second axis, and the coils in the second coil array 220 are symmetrical along the first axis and / or the second axis, such that when the first coil array 210 and the second coil array 220 are arranged opposite each other along a first direction 230, after the projections of the center 215 of the first coil array 210 and the center 225 of the second coil array 220 overlap, the projections of the first coil array 210 and the second coil array 220 on a plane perpendicular to the first direction 230 are symmetrical along the first axis and / or the second axis.

[0063] In some embodiments, after the first coil array 210 and the second coil array 220 are arranged opposite each other along a first direction, the projections of different types of coils in the first coil array 210 and the second coil array 220 onto a plane perpendicular to the first direction 230 can be symmetrical along a first axis and / or a second axis. For example, Figure 3 As shown, after the first coil array 310 and the second coil array 320 are arranged opposite each other along the first direction, the orthogonal coils in the first coil array 310 and the ring coils in the second coil array 320 are symmetrical along the second direction 330, and the two overlapping ring coils in the first coil array 310 and the two overlapping orthogonal coils in the second coil array 320 are symmetrical along the second direction 330.

[0064] In some embodiments, the coil configuration in the first coil array 210 and the coil configuration in the second coil array 220 are different. As described herein, the coil configuration in a coil array may include the number of coils, coil type, coil arrangement, etc. A difference in the coil configuration in the first coil array 210 and the second coil array 220 refers to a difference in at least one of the following: the number of coils, the coil type, and the coil arrangement.

[0065] In some embodiments, the coil types in the first coil array 210 and the second coil array 220 may include at least two, such as at least two of the following: toroidal coils, quadrature coils, and spiral coils. Toroidal coils may include circular coils, approximately circular elliptical coils, etc. Quadrature coils may include figure-eight coils, double-loop coils, etc.

[0066] The coil types in the first coil array 210 and the second coil array 220 can be the same or different.

[0067] In some embodiments, the first coil array 210 may include orthogonal coils and loop coils; the second coil array 220 may include orthogonal coils. For example, as... Figure 4 As shown, the first coil array 410 consists of one orthogonal coil and two loop coils, and the second coil array 420 consists of two orthogonal coils.

[0068] In some embodiments, the first coil array 210 may include orthogonal coils and loop coils; the second coil array 220 may include orthogonal coils and loop coils. For example, as... Figure 3 As shown, the first coil array 310 consists of one orthogonal coil and two loop coils, while the second coil array 320 consists of two orthogonal coils and one loop coil. For example, as... Figure 5 As shown, the first coil array 510 consists of an orthogonal coil and a ring coil, and the second coil array 520 consists of two orthogonal coils and two ring coils.

[0069] In some embodiments, the first coil array 210 may include orthogonal coils; the second coil array 220 may include ring coils. For example, the first coil array 210 consists of one orthogonal coil, and the second coil array 220 consists of two ring coils.

[0070] In some embodiments, the first coil array 210 may include orthogonal coils; the second coil array 220 may include ring coils and orthogonal coils. For example, as... Figure 6 As shown, the first coil array 610 consists of one orthogonal coil, and the second coil array 620 consists of one ring coil and two orthogonal coils.

[0071] In some embodiments, the first coil array 210 may include a ring coil; the second coil array 220 may include orthogonal coils. For example, the first coil array 210 consists of a ring coil, and the second coil array 220 consists of two orthogonal coils.

[0072] In some embodiments, the first coil array 210 may include a ring coil, and the second coil array 220 may include a quadrature coil and a ring coil. For example, the first coil array 210 consists of two ring coils, and the second coil array 420 consists of one ring coil and two quadrature coils.

[0073] When the first coil array 210 and the second coil array 220 are used for magnetic resonance scanning, since they need to be positioned on opposite sides of the same scanning object, if the coil types in both arrays are the same, it is more likely that the projections of adjacent coils in the first coil array 210 and the second coil array 220 will completely overlap in the plane perpendicular to the first direction 230, resulting in enhanced coupling. By configuring the coil types in the first coil array 210 and the second coil array 220 to be different, the probability of the projections of adjacent coils in the first coil array 210 and the second coil array 220 completely overlapping in the plane perpendicular to the first direction 230 can be reduced, thus reducing coupling.

[0074] The difference in the number of coils in the first coil array 210 and the second coil array 220 includes: a difference in the number of coils of the same type in the first coil array 210 and the second coil array 220, and / or a difference in the total number of coils in the first coil array 210 and the total number of coils in the second coil array 220. For example, the first coil array 210 includes M ring coils and N orthogonal coils, or it includes P ring coils and Q orthogonal coils, where M, N, P, and Q are all integers greater than or equal to 0, then at least one of M≠P and N≠Q is true. In some embodiments, the number of coils of the same type in the first coil array 210 and the second coil array 220 can be the same or different. Preferably, the number of coils of the same type in the first coil array 210 and the second coil array 220 is different.

[0075] like Figure 3 As shown, the number of coils of the same type in the first coil array 310 and the second coil array 320 are different. The number of ring coils in the first coil array 310 is 2, while the number of ring coils in the second coil array 320 is 1; the number of orthogonal coils in the first coil array 310 is 1, while the number of orthogonal coils in the second coil array 320 is 2.

[0076] When the first coil array 210 and the second coil array 220 are used for magnetic resonance scanning, since they need to be positioned on opposite sides of the same scanning object, and the number of coils of the same type in the first coil array 210 and the second coil array 220 is the same, the projections of the coils of the same type in the first coil array 210 and the second coil array 220 onto the plane perpendicular to the first direction 230 are more likely to completely overlap, resulting in enhanced coupling. By making the number of coils of the same type in the first coil array 210 and the second coil array 220 different, when the first coil array 210 and the second coil array 220 are used for magnetic resonance scanning, since they need to be positioned on opposite sides of the same scanning object, the projections of adjacent coils on the plane perpendicular to the first direction 230 will not completely overlap.

[0077] The coil arrangement in the first coil array 210 differs from that in the second coil array 220. This difference can include variations in the degree of overlap between adjacent coils of the same or different types in the first array and between adjacent coils of the same or different types in the second array. The degree of overlap between adjacent coils can be represented by the ratio of the overlapping area to the area occupied by either coil alone. A larger ratio indicates a greater degree of overlap. A ratio of 1 indicates complete overlap, while a ratio of 0 indicates partial overlap.

[0078] In some embodiments, the different coil arrangements in the first coil array 210 and the second coil array 220 may include different arrangements of coils of the same type in the first coil array 210 and the second coil array 220, that is, different degrees of overlap between adjacent coils of the same type in the first coil array 210 and the second coil array 220. When the first coil array 210 and the second coil array 220 are used for magnetic resonance scanning, since the first coil array 210 and the second coil array 220 need to be arranged on both sides of the same scanning object, when the degree of overlap of the same type of coils in the first coil array 210 and the second coil array 220 is high, it is more likely that the projections of the same type of coils in the first coil array 210 and the second coil array 220 on the plane perpendicular to the first direction 230 will completely overlap, thereby leading to enhanced coupling.

[0079] By making the overlap of the same type of coils in the first coil array 210 and the second coil array 220 different, when the first coil array 210 and the second coil array 220 are used for magnetic resonance scanning, since the first coil array 210 and the second coil array 220 need to be set on both sides of the same scanning object, the projections of adjacent coils of the same type in the first coil array 210 and the second coil array 220 on the plane perpendicular to the first direction 230 will not completely overlap.

[0080] In some embodiments, coils of the same type in the first coil array 210 and the second coil array 220 may be arranged alternately. For example, as Figure 3 As shown, the two ring coils in the first coil array 310 are arranged alternately, and the two orthogonal coils in the second coil array 320 are arranged alternately. For example, as... Figure 4 As shown, the two ring coils in the first coil array 410 are arranged alternately, and the two orthogonal coils in the second coil array 420 are arranged alternately.

[0081] In some embodiments, the center positions of coils of the same type in the first coil array 210 and the second coil array 220 may be different. The different center positions of multiple coils can be caused by the projections of the centers of these coils onto a plane 240 perpendicular to the first direction 230 not coinciding. For example, as... Figure 3 As shown, the center positions of the three ring coils in the first coil array 310 and the second coil array 320 are all different, and the center positions of the three orthogonal coils are also all different. For example, as... Figure 4 As shown, the center positions of the two ring coils in the first coil array 410 and the second coil array 420 are different, and the center positions of the three orthogonal coils are also different.

[0082] Through the embodiments described in this specification, the coil configurations (e.g., type, number, and arrangement) in the first coil array 210 and the second coil array 220 are designed such that the projections of any two adjacent coils in the first coil array 210 and the second coil array 220 do not completely overlap, with only partially overlapping projection areas. By ensuring that the coil projections of the upper and lower coil arrays do not completely overlap, the mutual inductance between adjacent coils is canceled out. When the coils partially overlap, the mutual inductance between the coils can be canceled out through appropriate geometric design, so that the signal of one coil does not significantly affect adjacent coils, thereby reducing the coupling between coils and improving the signal-to-noise ratio.

[0083] In some embodiments, such as Figure 2B and Figure 2CAs shown, the magnetic resonance coil assembly 200 also includes support members, namely a first support member 250 and a second support member 260. A first coil array 210 can be arranged on the surface of the first support member 250, and a second coil array 220 can be arranged on the surface of the second support member 260. For example, the first coil array 210 can be arranged on the outer or inner surface of the first support member 250.

[0084] In some embodiments, the shape of the first coil array 210 may be adapted to the shape of the first support member 250, and the shape of the second coil array 220 may be adapted to the shape of the second support member 260. Taking the first coil array 210 and the first support member 250 as examples, as... Figure 2B and Figure 2C As shown, the outer surface of the first support member 250 is arc-shaped, and the first coil array 210 is attached to the outer surface of the first support member 250. Therefore, the shape of the first coil array 210 is an arc-shaped curved surface.

[0085] Figure 3 This is a schematic diagram of an exemplary magnetic resonance coil assembly according to some embodiments of this specification. Figure 3 As shown, the magnetic resonance coil assembly 300 includes a first coil array 310 and a second coil array 320. It should be noted that the number of coils in the magnetic resonance coil assembly 300 is for illustrative purposes only; the actual number of coils can be increased according to requirements. For example, the number of figure-eight coils and the number of loop coils can be increased along the second direction 330.

[0086] The first coil array 310 includes two ring coils and one orthogonal coil. The two ring coils are elliptical coils, and the orthogonal coil is a figure-eight shaped coil. The two ring coils are symmetrically distributed on both sides of the orthogonal coil. The three coils overlap in pairs, and there is an overlapping area in the central part of the three coils.

[0087] The second coil array 320 includes two orthogonal coils and one loop coil. The two orthogonal coils are figure-eight shaped coils, and the loop coil is an elliptical coil. The two orthogonal coils are symmetrically distributed on both sides of the loop coil, with each pair of coils overlapping, and there is an overlapping area in the central part of the three coils.

[0088] The orthogonal coils in the first coil array 310 and the loop coils in the second coil array 320 are symmetrical along the second direction 330. The two overlapping loop coils in the first coil array 310 and the two overlapping orthogonal coils in the second coil array 320 are symmetrical along the second direction 330, thereby achieving complete decoupling, greatly improving the signal-to-noise ratio and image quality. The projections of the coils in the first coil array 310 and the coils in the second coil array 320 onto the plane containing the first coil array 310 or the second coil array 320 are not completely overlapping, which cancels the mutual inductance between adjacent coils, so that the signal of one coil will not significantly affect the adjacent coils, thereby reducing the coupling between coils and improving the signal-to-noise ratio.

[0089] Figure 4 This is a schematic diagram of an exemplary magnetic resonance coil assembly according to some embodiments of this specification. Figure 4 As shown, the magnetic resonance coil assembly 400 includes a first coil array 410 and a second coil array 420.

[0090] The first coil array 410 has the same configuration as the first coil array 310, and will not be described again here.

[0091] The second coil array 420 reduces one loop coil from the second coil array 320, and includes two orthogonal coils, both of which are figure-eight coils. The two orthogonal coils have an overlapping area in the central part.

[0092] The two overlapping loop coils in the first coil array 410 and the two overlapping orthogonal coils in the second coil array 420 are symmetrical along the second direction 430, which effectively removes coupling, thereby improving the signal-to-noise ratio and image quality. The projections of the coils in the first coil array 410 and the coils in the second coil array 420 onto the plane containing the first coil array 410 or the second coil array 420 do not completely overlap, which cancels the mutual inductance between adjacent coils, so that the signal of one coil will not significantly affect the adjacent coils, thereby reducing the coupling between coils and improving the signal-to-noise ratio.

[0093] Figure 5 This is a schematic diagram of an exemplary magnetic resonance coil assembly according to some embodiments of this specification. Figure 5 As shown, the magnetic resonance coil assembly 500 includes a first coil array 510 and a second coil array 520.

[0094] The first coil array 510 reduces one loop coil from the first coil array 310, and includes one orthogonal coil and one loop coil. The orthogonal coil is a figure-eight coil, and the loop coil is a circular coil. The orthogonal coil and the loop coil have an overlapping area in the central part.

[0095] The second coil array 520 adds a ring coil to the second coil array 320, including two orthogonal coils and two ring coils. The two orthogonal coils are both figure-eight shaped coils, and the two ring coils are both circular coils. The two orthogonal coils are symmetrically distributed on both sides of the ring coils, and the two ring coils are symmetrically distributed on both sides of the orthogonal coils. The four coils overlap in pairs, and there is an overlapping area in the central part of the four coils.

[0096] The loop coils and orthogonal coils in the first coil array 510 are symmetrical about the two overlapping orthogonal coils and two overlapping loop coils in the second coil array 520 along the second direction 530, which effectively removes coupling, thereby improving the signal-to-noise ratio and image quality. The projections of the coils in the first coil array 510 and the coils in the second coil array 520 onto the plane containing the first coil array 510 or the second coil array 520 do not completely overlap, which cancels out the mutual inductance between adjacent coils, so that the signal of one coil will not significantly affect the adjacent coils, thereby reducing the coupling between coils and improving the signal-to-noise ratio.

[0097] Figure 6 This is a schematic diagram of an exemplary magnetic resonance coil assembly according to some embodiments of this specification. Figure 6 As shown, the magnetic resonance coil assembly 600 includes a first coil array 610 and a second coil array 620.

[0098] The first coil array 610 reduces one loop coil from the first coil array 510, and includes one orthogonal coil, which is a figure-eight coil.

[0099] The second coil array 620 reduces one loop coil from the second coil array 520, comprising two orthogonal coils and one loop coil. The two orthogonal coils are both figure-eight shaped coils, and the loop coil is a circular coil. The two orthogonal coils are symmetrically distributed on both sides of the loop coil, with each pair of coils overlapping, and there is an overlapping area in the central part of the three coils.

[0100] The loop coil in the first coil array 610 and the two overlapping orthogonal coils and two overlapping loop coils in the second coil array 620 are symmetrical along the second direction 630, which effectively removes coupling, thereby improving the signal-to-noise ratio and image quality. The projections of the coils in the first coil array 610 and the coils in the second coil array 620 onto the plane containing the first coil array 610 or the second coil array 620 do not completely overlap, which cancels the mutual inductance between adjacent coils, so that the signal of one coil will not significantly affect the adjacent coils, thereby reducing the coupling between coils and improving the signal-to-noise ratio.

[0101] In some embodiments, the first coil array 210 and the second coil array 220 can be configured differently. For example, one array may include a loop coil, and the other may include two loop coils and an orthogonal coil. Alternatively, one array may include more than four coils. By combining and arranging various types and numbers of coils, different needs can be well met, achieving a balance between reduced complexity and good decoupling effect.

[0102] The basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this specification. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this specification. Such modifications, improvements, and corrections are suggested in this specification and therefore remain within the spirit and scope of the exemplary embodiments described herein.

[0103] Finally, it should be understood that the embodiments described in this specification are merely illustrative of the principles of the embodiments described herein. Other variations may also fall within the scope of this specification. Therefore, alternative configurations of the embodiments described herein are intended to be illustrative rather than limiting, and should be considered consistent with the teachings of this specification. Accordingly, the embodiments described herein are not limited to those explicitly introduced and described herein.

Claims

1. A magnetic resonance coil assembly, characterized in that, Includes a first coil array and a second coil array; When the first coil array and the second coil array are configured to be positioned opposite each other along a first direction for detecting magnetic resonance signals, the projections of two adjacent coils in the first coil array and the second coil array onto a plane perpendicular to the first direction do not completely overlap.

2. The magnetic resonance coil assembly as claimed in claim 1, characterized in that, The projections of the first coil array and the second coil array onto the plane perpendicular to the first direction are symmetrical along a first axis and / or a second axis. The first axis is parallel to the second direction, the second axis is perpendicular to the second direction, and the second direction is parallel to the coil arrangement direction in the first coil array or the second coil array.

3. The magnetic resonance coil assembly as described in claim 1, characterized in that, The projections of the center of the first coil array and the center of the second coil array onto a plane perpendicular to the first direction coincide.

4. The magnetic resonance coil assembly as claimed in claim 1, characterized in that, The coil types in the first coil array and the second coil array include at least two types, and the at least two types of coils include toroidal coils and quadrature coils.

5. The magnetic resonance coil assembly as claimed in claim 4, characterized in that, The first coil array includes two loop coils and one orthogonal coil. The second coil array includes a loop coil and two orthogonal coils, or The second coil array includes two orthogonal coils.

6. The magnetic resonance coil assembly as claimed in claim 1, characterized in that, The number of coils of the same type differs in the first coil array and the second coil array.

7. The magnetic resonance coil assembly as claimed in claim 1, characterized in that, The coils of the same type in the first coil array and the second coil array are arranged alternately.

8. The magnetic resonance coil assembly as claimed in claim 1, characterized in that, The center positions of the same type of coils in the first coil array and the second coil array are different.

9. The magnetic resonance coil assembly as claimed in claim 1, characterized in that, It also includes a first support member and a second support member, wherein the first coil array is arranged on the surface of the first support member and the second coil array is arranged on the surface of the second support member.

10. A magnetic resonance device, characterized in that, The device includes a magnetic resonance coil assembly as described in any one of claims 1-9.

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