Coil assembly and method of manufacturing the same, magnetic resonance imaging apparatus

Abstract

The present application relates to a coil assembly and a manufacturing method thereof, and a magnetic resonance imaging device, the magnetic resonance imaging device comprising the coil assembly, the coil assembly comprising a substrate and at least one coil array unit, the coil array unit being arranged on the substrate, each coil array unit comprising at least one quadrature coil and a set of linear coils, the set of linear coils comprising at least two linear coils arranged in sequence along a first direction, the at least two linear coils overlapping to form an overlapping area, and the at least one quadrature coil in each coil array unit being arranged one-to-one with the overlapping area. By arranging the quadrature coil, one quadrature coil is arranged in each overlapping area, and the signal-to-noise ratio of the overlapping area can be improved by the quadrature coil, so that the signal receiving quality is improved.

Description

Technical Field

[0001] This invention relates to the field of magnetic resonance technology, and in particular to coil assemblies and their manufacturing methods, and magnetic resonance imaging equipment. Background Technology

[0002] Magnetic resonance imaging (MRI) devices include a radio frequency (RF) transmitting coil and a magnetic resonance receiving coil. The RF transmitting coil generates RF pulses to excite protons, while the receiving coil receives the magnetic resonance signals generated by atomic nuclei. Alternatively, the receiving and RF transmitting coils can be integrated into a single transceiver coil. In MRI systems, the good uniformity of the magnetic field generated by the RF transmitting coil, high transmission efficiency, and high signal-to-noise ratio of the signal received by the receiving coil are key factors for obtaining high-quality images.

[0003] In the receiving coil or transceiver coil, multi-channel magnetic resonance coils are generally used. There will be coupling between different coils, which needs to be decoupled by making the adjacent two channel coils overlap. That is, there will be overlapping areas between different channel coils.

[0004] However, using overlapping decoupling will reduce the signal-to-noise ratio in the overlapping area, thus affecting signal reception. Summary of the Invention

[0005] Therefore, it is necessary to address the issue that the signal-to-noise ratio in the overlapping region will decrease when using overlapping decoupling methods, and to propose a coil assembly, its manufacturing method, and a magnetic resonance imaging device.

[0006] A coil assembly, comprising:

[0007] substrate;

[0008] At least one coil array unit is disposed on the substrate. Each coil array unit includes at least one orthogonal coil and a set of linear coils. The set of linear coils includes at least two linear coils arranged sequentially along a first direction. The at least two linear coils overlap to form an overlapping region. At least one orthogonal coil in each coil array unit is disposed corresponding to the overlapping region.

[0009] In one embodiment, each of the orthogonal coils covers the corresponding overlapping region.

[0010] In one embodiment, each of the coil array units includes an orthogonal coil, and the set of linear coils includes only two linear coils.

[0011] In one embodiment, the coil assembly includes at least a first coil array unit and a second coil array unit arranged along a first direction, wherein a linear coil in the first coil array unit overlaps with a linear coil in the second coil array unit.

[0012] In one embodiment, at least one of the following intersections has an opening: the intersection of the orthogonal coil, the intersection formed by the overlap of two adjacent linear coils, and the intersection formed by the overlap of the linear coil and the orthogonal coil.

[0013] The coil assembly includes a jumper connector, and the opening is connected through the jumper connector.

[0014] A coil assembly, comprising:

[0015] substrate;

[0016] At least two orthogonal coils are arranged sequentially along a first direction, the orthogonal coils are disposed on the substrate, and two adjacent orthogonal coils overlap to form an overlapping region;

[0017] Linear coils are disposed on the substrate and are disposed in a one-to-one correspondence with the overlapping areas.

[0018] In one embodiment, each of the linear coils covers its corresponding overlapping area.

[0019] In one embodiment, two adjacent orthogonal coils overlap to form a first overlapping region and a second overlapping region;

[0020] The first and second overlapping regions correspond to the same linear coil.

[0021] In one embodiment, the linear coil is symmetrical about the line connecting the orthogonal centers of the two orthogonal coils.

[0022] In one embodiment, at least one of the intersections of the orthogonal coils, the intersections formed by the overlap of two adjacent orthogonal coils, and the intersections formed by the overlap of the linear coil and the orthogonal coils has an opening;

[0023] The coil assembly includes a jumper connector, and the opening is connected through the jumper connector.

[0024] In one embodiment, the jumper connector is made of FR-4 epoxy fiberglass cloth substrate with copper cladding.

[0025] In one embodiment, the substrate is a flexible circuit board.

[0026] In one embodiment, the flexible circuit board is made of FR-4 epoxy fiberglass cloth.

[0027] A method for manufacturing a coil assembly includes the following steps:

[0028] Linear coils and quadrature coils are pre-fabricated on a substrate to form a single unit; the single unit includes an opening located at the intersection of the linear coils and / or the quadrature coils;

[0029] Connect the openings on the linear coil and / or the quadrature coil using jumper connectors.

[0030] A magnetic resonance imaging device includes the aforementioned coil assembly.

[0031] The aforementioned coil assembly and its manufacturing method, as well as the magnetic resonance imaging device, include a set of linear coils comprising at least two linear coils arranged sequentially along a first direction, decoupled by overlapping adjacent linear coils. Furthermore, by setting orthogonal coils, such that one orthogonal coil is respectively positioned on each overlapping region, the signal-to-noise ratio of the overlapping region can be improved, thereby enhancing signal reception quality. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the coil assembly in one embodiment;

[0033] Figure 2 for Figure 1 A schematic diagram of the overlapping structure of two linear coils in the coil assembly in the embodiment;

[0034] Figure 3 for Figure 1 A schematic diagram of the structure of the orthogonal coil in the coil assembly in the embodiment;

[0035] Figure 4 This is a schematic diagram of the coil assembly in another embodiment;

[0036] Figure 5 for Figure 4 A schematic diagram of the overlapping structure of two orthogonal coils in the coil assembly in the embodiment;

[0037] Figure 6 for Figure 4 A schematic diagram of the structure of the linear coil in the coil assembly in the embodiment;

[0038] Figure 7 This is a schematic diagram of the structure before the two linear coils are connected to the jumper connector;

[0039] Figure 8 for Figure 7 A schematic diagram of the structure after the two linear coils are connected to the jumper connector;

[0040] Figure 9 This is a schematic diagram of the structure after connecting two linear coils to a jumper connector in another embodiment;

[0041] Figure 10This is a schematic diagram showing the distance relationship between the jumper connector and the substrate in the overlapping direction.

[0042] Reference numerals: 100 - Linear coil; 110 - Overlapping area; 120 - First coil unit; 121 - Butt joint; 121a - First butt joint; 121b - Second butt joint; 122 - Opening; 122a - First opening; 122b - Second opening; 130 - Second coil unit; 140 - Crossover portion;

[0043] 200 - Orthogonal coil; 210 - Overlapping region; 211 - First overlapping region; 212 - Second overlapping region;

[0044] 300 - Jumper connector; 310 - Connector section; 310a - First connector section; 310b - Second connector section; 320 - Jumper section;

[0045] 400-Substrate. Detailed Implementation

[0046] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0047] In the description of this invention, 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," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0048] Furthermore, 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0049] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," 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 functional relationship between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0050] In this invention, unless otherwise explicitly 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," "over," and "on top" of 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.

[0051] 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.

[0052] See Figures 1-3 An embodiment of the present invention provides a coil assembly, including a substrate and at least one coil array unit. The coil array unit is disposed on the substrate. Each coil array unit includes at least one orthogonal coil 200 and a set of linear coils 100. The set of linear coils 100 includes at least two linear coils 100 arranged sequentially along a first direction. The at least two linear coils 100 overlap to form an overlapping region 110. At least one orthogonal coil 200 in each coil array unit is correspondingly disposed with respect to the overlapping region 110.

[0053] In this embodiment, a set of linear coils 100 includes at least two linear coils 100 arranged sequentially along a first direction. Two adjacent linear coils 100 overlap, and an orthogonal coil 200 is respectively provided on each overlapping area 110. By setting the orthogonal coil 200, the signal-to-noise ratio of the overlapping area can be improved, thereby improving the signal reception quality.

[0054] Furthermore, each orthogonal coil 200 covers its corresponding overlapping region 110, thereby ensuring that the signal-to-noise ratio at any location in the overlapping region 110 can be improved.

[0055] in ， The quadrature coil 200 and the linear coil 100 are located on the same side of the substrate. Specifically, the linear coil 100 can be located on the quadrature coil 200 or the quadrature coil 200 can be located on the linear coil 100; no specific restriction is made here.

[0056] In some embodiments, each coil array unit includes an orthogonal coil 200, and a set of linear coils 100 includes two linear coils 100 that overlap.

[0057] In practical applications, because the dimensions of two adjacent linear coils along the first direction are relatively large, while the dimensions of the orthogonal coil 200 along the first direction are relatively small, when a set of linear coils 100 includes three or more linear coils 100, the distance between two adjacent overlapping regions 110 along the first direction is easily greater than or equal to the dimension of the orthogonal coil 200 along the first direction. This results in adjacent orthogonal coils 200 being close in distance but not overlapping, which can easily lead to coupling. Therefore, specifically, a set of linear coils 100 can be made to include only two linear coils 100, with the two linear coils 100 overlapping. This avoids the coupling problem caused by multiple overlapping regions in a set of linear coils 100.

[0058] In some embodiments, the coil assembly includes at least a first coil array unit and a second coil array unit arranged sequentially along a first direction, wherein a linear coil in the first coil array unit overlaps with a linear coil 100 in the second coil array unit, thereby enabling the first coil array unit and the second coil array unit to overlap and decouple.

[0059] In practical use, only two adjacent linear coils 100 in the first coil array unit and the second coil array unit overlap. No quadrature coils 200 are set in the overlapping area to prevent the quadrature coil 200 from not overlapping with any of the quadrature coils 200 in the two adjacent coil array units due to the limited width of the quadrature coil 200 along the first direction, thus preventing coupling and causing poor signal quality.

[0060] In some embodiments, the linear coil 100 is an axisymmetric coil. Specifically, the extension direction of the axis of symmetry of the linear coil 100 is a first direction. The linear coil 100 can be an elliptical loop coil, a circular loop coil, or a rectangular loop coil.

[0061] In some embodiments, at least one of the following intersections is provided with an opening: the intersection of the quadrature coil 200, the intersection formed by the overlap of two adjacent linear coils 100, and the intersection formed by the overlap of the linear coil 100 and the quadrature coil 200. The coil assembly includes a jumper connector 300, and the opening is connected through the jumper connector 300.

[0062] Specifically, the following explanation will be given using the example of a jumper connector 300 connecting the opening at the intersection formed by the overlapping of two adjacent linear coils 100.

[0063] See Figures 7-10 For ease of description, two adjacent linear coils are defined as a first linear coil 120 and a second linear coil 130, respectively. The first linear coil 120 and the second linear coil 130 overlap and have a crossing portion 140. An opening 122 is provided on the first linear coil 120 and / or the second linear coil 130 at the crossing portion 140. A jumper connector 300 connects the two ends of the opening 122 on the first linear coil 120 and / or the second linear coil 130. The first linear coil 120 and the second linear coil 130 are located on the same side of the substrate 400. The two ends of the opening 122 on the first linear coil 120 and / or the second linear coil 130 are connected by a jumper connector 300. At the intersection of the first linear coil 120 and the second linear coil 130, there is a certain gap between the jumper connector 300 and the substrate 400, so that the first linear coil 120 and the second linear coil 130 do not directly form circuit interference and overlap on the substrate. The first linear coil 120 and the second linear coil 130 are connected by the jumper connector 300 at the intersection, which simplifies the circuit structure and avoids capacitive coupling between the first linear coil 120 and the second linear coil 130.

[0064] Specifically, the first linear coil 120 and the second linear coil 130 overlap and have a crossover portion 140. The first linear coil 120 and the second linear coil 130 form two openings 122 at the crossover portion. At the same time, there are also two jumper connectors 300, and each opening 122 is connected through a jumper connector 300.

[0065] It should be noted that the overlapping direction of the first linear coil 120 and the second linear coil 130 is the normal direction of the substrate 400. When the substrate 400 is planar, and multiple linear coils are laid horizontally, the overlapping direction refers to the vertical direction perpendicular to the plane of the substrate 400. When the substrate 400 is an arc surface, and multiple linear coils are laid circumferentially along an arc surface, the overlapping direction refers to the radial direction of the arc surface of the substrate 400.

[0066] Furthermore, at the intersection 140, the jumper connector 300 has a gap with the substrate 400. In practical use, the distance between the jumper connector 300 and the substrate can be increased, that is, the distance between the jumper connector 300 and the first linear coil 120 or the second linear coil 130 along the overlapping direction can be increased. This allows air, as a dielectric, to pass between the jumper connector 300 and the first linear coil 120 or the second linear coil 130. Due to the good loss characteristics of air, the coupling capacitance is reduced, thereby reducing interference between the signals in the two channels and improving the quality of the received signal.

[0067] In one embodiment, combined Figure 8 The first linear coil 120 has an opening 122, and the second linear coil 130 passes through the opening 122 and is spaced apart from the first linear coil 120. That is, the first linear coil 120 has two openings 122 at the intersection, and the second linear coil 130 passes through the middle of the two openings 122 in sequence. Then, the two openings 122 are connected by two jumper connectors 300, thus forming an overlap between the first linear coil 120 and the second linear coil 130.

[0068] In another embodiment, the second linear coil has an opening through which the first linear coil passes, and is spaced apart from the second linear coil. That is, the second linear coil has two openings at the intersection, the first linear coil passes through the middle of the two openings in sequence, and then the two openings are connected by two jumper connectors, thus forming an overlap between the first and second linear coils.

[0069] In other embodiments, combined with Figure 9 Both the first linear coil 120 and the second linear coil 130 have openings 122. The first linear coil 120 has a first opening 122a, and the second linear coil 130 has a second opening 122b. The first linear coil 120 passes through the second opening 122b of the second linear coil 130, and the second linear coil 130 passes through the first opening 122a of the first linear coil 120. The first linear coil 120 and the second linear coil 130 are spaced apart at the openings 122. The first opening 122a of the first linear coil 120 and the second opening 122b of the second linear coil 130 are connected by jumper connectors 300, thereby forming an overlap between the first linear coil 120 and the second linear coil 130.

[0070] In some embodiments, each jumper connector 300 has a consistent length, and each opening 122 has an equal size. When the jumper connector 300 is connected to the first linear coil 120 and / or the second linear coil 130, the consistency of the height of each jumper connector 300 in the overlapping direction can be guaranteed. This prevents differences in the induced electromotive force in each linear coil due to variations in the height of the jumper connectors 300 in the overlapping direction, thus avoiding any impact on the received signal.

[0071] Specifically, the jumper connector 300 includes a connecting section 310 and a jumper section 320 connected to each other. The two ends of the first linear coil 120 and / or the second linear coil 130 near the opening 122 are respectively provided with mating sections 121. The two ends of the jumper section 320 are respectively connected to the mating section 121 through the connecting section 310. The lengths of the connecting section 310 and the corresponding mating section 121 are equal.

[0072] In this embodiment, with each jumper connector 300 having the same length and each opening 122 having the same size, by making the connecting segment 310 and the mating segment 121 of equal length and correspondingly connected, it is possible to prevent the jumper segment 320 from having inconsistent heights in the overlapping direction due to the different connection lengths of the connecting segment 310 and the mating segment 121 of each jumper connector 300 during actual manufacturing.

[0073] The connecting segment 310 is divided into a first connecting segment 310a and a second connecting segment 310b, wherein the first connecting segment 310a, the jumper segment 320, and the second connecting segment 310b are connected sequentially. The mating segment 121 is divided into a first mating segment 121a and a second mating segment 121b. The lengths of the first connecting segment 310a and the first mating segment 121a are equal, and the lengths of the second connecting segment 310b and the second mating segment 121b are equal. In other words, the lengths of the first connecting segment 310a, the second connecting segment 310b, the first mating segment 121a, and the second mating segment 121b are all equal. Therefore, when connecting the jumper connector 300, it is not necessary to distinguish between the first connecting segment 310a and the second connecting segment 310b, facilitating quick connection of the jumper connector 300.

[0074] In some embodiments, the connecting segment 310 is welded to the mating segment 121. That is, welding ensures a tight connection between the connecting segment 310 and the mating segment 121, preventing any loose connection between them.

[0075] In other embodiments, the connecting segment 310 may have a snap-fit ​​structure, and the mating segment 121 may have a mating structure, with the snap-fit ​​structure engaging with the mating structure. Specifically, the snap-fit ​​structure may be a hook with a locking mechanism, and the mating structure may be a through hole. When connecting the connecting segment 310 and the mating segment 121, the hook is first passed through the through hole, and then the locking mechanism locks the hook in place. It should be noted that after the snap-fit ​​structure and the mating structure engage, they should ensure a tight connection between the connecting segment 310 and the mating segment 121 to prevent any loose connection.

[0076] In some embodiments, see Figure 8 or Figure 9 The jumper segment 320 has an arched structure. When the connecting segment 310 is connected to the mating segment 121, the jumper segment 320 is naturally bent to form an arched structure. When at least two linear coils are superimposed, the distance between the apex of each arched structure and the substrate 400 along the overlapping direction is equal, thereby avoiding interference with the received signal.

[0077] Specifically, at the intersection, refer to Figure 10 The maximum distance H between the jumper connector 300 and the substrate 400 along the overlapping direction is ≥1.5mm. In some embodiments, 1.5mm≤H≤2mm. Setting the maximum distance to H≥1.5mm avoids the jumper connector 300 and the substrate 400 being too small along the overlapping direction, which would cause parallel capacitance between the two superimposed linear coils, resulting in capacitive coupling. 1.5mm≤H≤2mm also prevents the distance between the jumper connector 300 and the substrate 400 from being too large, which would cause unstable connections between the jumper connector and the first linear coil 120 and / or the second linear coil 130, thereby affecting the signal-to-noise ratio of the signal received by the receiving coil.

[0078] See Figures 4-6 One embodiment of the present invention provides another coil assembly, which includes a substrate and at least two orthogonal coils 200 arranged sequentially along a first direction and at least one linear coil 100. The orthogonal coils 200 are disposed on the substrate, and two adjacent orthogonal coils 200 overlap to form an overlapping region 210. At least one linear coil 100 is disposed on the substrate and is arranged in a one-to-one correspondence with the overlapping region 210.

[0079] In this embodiment, by setting a linear coil 100, a linear coil 100 is respectively set on each overlapping region 210. Since the signal-to-noise ratio of the orthogonal coil 200 along the depth direction is high, setting the orthogonal coil 200 can compensate the signal-to-noise ratio of two adjacent orthogonal coils 200 along the depth direction in the overlapping region, thereby improving the signal reception quality.

[0080] It should be noted that the surface signal-to-noise ratio refers to the signal-to-noise ratio of the plane where the orthogonal coil 200 is located, while the depth signal-to-noise ratio refers to the signal-to-noise ratio perpendicular to the plane where the orthogonal coil 200 is located.

[0081] Furthermore, each linear coil 100 covers its corresponding overlapping region 210 to ensure that the depth signal-to-noise ratio at any location in the overlapping region 210 can be improved.

[0082] In some embodiments, combined with Figure 4 Two adjacent orthogonal coils 200 overlap to form a first overlapping region 211 and a second overlapping region 212, and the first overlapping region 211 and the second overlapping region 212 correspond to the same linear coil 100.

[0083] In some embodiments, the number of orthogonal coils is at least three, that is, at least three orthogonal coils overlap to form at least two overlapping regions arranged sequentially along the first direction, and the two linear coils corresponding to the two adjacent overlapping regions overlap, so that the two adjacent linear coils can also overlap and decouple.

[0084] In some embodiments, the linear coil 100 is symmetrical about the line connecting the orthogonal centers of the orthogonal coils 200. Specifically, the linear coil 100 can be an elliptical loop coil, a circular loop coil, or a rectangular loop coil.

[0085] In some embodiments, at least one of the following intersections is provided with an opening: the intersection of the orthogonal coil 200, the intersection formed by the overlap of two adjacent orthogonal coils 200, and the intersection formed by the overlap of the linear coil 100 and the orthogonal coil 200. The coil assembly includes a jumper connector 300, through which the opening is connected.

[0086] The specific connection method of the jumper connector is as described in the above embodiment, referring to the connection method between the jumper connector and the two adjacent linear coils 100.

[0087] In some embodiments of the present invention, the jumper connector 300 is made of FR-4 epoxy fiberglass cloth substrate with copper cladding. The jumper connector 300 is made of a flexible material, which facilitates the connection of the opening through the jumper connector 300, and also facilitates the spacing between the jumper connector 300 and the substrate 400.

[0088] In some embodiments, the substrate 400 is a flexible circuit board. In practical use, the substrate can be fixed to the coil housing. The thickness of the substrate 400 is 0.1mm-0.2mm; in some embodiments, the thickness is 0.15mm. The substrate can be bent to adapt to coil housings of various shapes. Specifically, the flexible circuit board is made of FR-4 epoxy fiberglass cloth substrate.

[0089] An embodiment of the present invention also provides a method for manufacturing a coil assembly, comprising first prefabricating a linear coil 100 and an orthogonal coil 200 on a substrate to form an integral part, the integral part including an opening located at the intersection of the linear coil 100 and / or the orthogonal coil 200. Then, the openings on the linear coil 100 and / or the orthogonal coil 200 are connected via jumper connectors. Finally, the integral part connected via jumper connectors is fixed to a coil housing.

[0090] Specifically, the linear coil 100 and the quadrature coil 200 are made of copper and can be prefabricated on one side of the substrate 400 surface by lamination, printing, or coating. Since the jumper connector is bendable, during connection, the jumper connector 300 can be bent naturally first, and then its two ends can be soldered to the two ends of the opening 122 on the linear coil 100 and / or the quadrature coil 200, respectively. After connection, the substrate is fixed to the coil housing to complete the manufacturing of the coil assembly. In some embodiments, the substrate and the coil housing can be connected by adhesive bonding.

[0091] In some embodiments, the coil assembly is a receiving coil or a transceiver coil in a magnetic resonance imaging device for animal magnetic resonance imaging.

[0092] One embodiment of the present invention provides a magnetic resonance imaging device, including a coil assembly, wherein the coil assembly is used as a receiving coil or a transceiver coil in the magnetic resonance imaging device.

[0093] In one embodiment, the magnetic resonance imaging device includes a coil assembly, which includes a substrate and at least one coil array unit disposed on the substrate. The coil array unit includes orthogonal coils 200 and a set of linear coils 100. The set of linear coils 100 includes at least two linear coils 100 arranged sequentially along a first direction. Two adjacent linear coils 100 overlap to form an overlapping region 110. The orthogonal coils 200 are arranged in a one-to-one correspondence with the overlapping regions 110.

[0094] In another embodiment, the magnetic resonance imaging device includes a coil assembly comprising a substrate and at least two orthogonal coils 200 arranged sequentially along a first direction. The orthogonal coils 200 are disposed on the substrate, with adjacent orthogonal coils 200 overlapping to form an overlapping region 210. At least one linear coil 100 is disposed on the substrate and is arranged in a one-to-one correspondence with the overlapping region 210.

[0095] In other embodiments, the magnetic resonance imaging device may also include the two types of coils described in any of the above embodiments.

[0096] Specifically, the magnetic resonance imaging (MRI) device also includes a movable bed for transporting the object to be scanned, with the coil assembly fixed to the movable bed via a coil housing. In use, after the object to be scanned is placed on the movable bed, the coil housing is placed over the area of ​​the object to be scanned, and then the movable bed is inserted into the scanning cavity for imaging. In some embodiments, the object to be scanned is a mouse, and the area to be scanned is its head.

[0097] 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 specification.

[0098] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A coil assembly, characterized in that, include: substrate; At least one coil array unit is disposed on the substrate. Each coil array unit includes an orthogonal coil (200) and a set of linear coils (100). The set of linear coils (100) includes only two linear coils (100) arranged sequentially along a first direction. The two linear coils (100) overlap to form an overlapping region (110). One orthogonal coil (200) in each coil array unit is correspondingly disposed to the overlapping region (110). Each of the orthogonal coils (200) covers the corresponding overlapping area (110); two adjacent orthogonal coils (200) do not overlap.

2. The coil assembly according to claim 1, characterized in that, The coil assembly includes at least a first coil array unit and a second coil array unit arranged along a first direction, wherein a linear coil in the first coil array unit overlaps with a linear coil in the second coil array unit.

3. The coil assembly according to any one of claims 1-2, characterized in that, An opening is provided at least one of the following intersections: the intersection of the orthogonal coil (200), the intersection formed by the overlap of two adjacent linear coils (100), and the intersection formed by the overlap of the linear coil (100) and the orthogonal coil (200); The coil assembly includes a jumper connector (300), through which the opening is connected.

4. A coil assembly, characterized in that, include: substrate; At least two orthogonal coils (200) arranged sequentially along a first direction are disposed on the substrate, and two adjacent orthogonal coils (200) overlap to form an overlapping region (210). A linear coil (100) is disposed on the substrate and is disposed in a one-to-one correspondence with the overlapping area (210); Each of the linear coils (100) covers its corresponding overlapping area (210); Two adjacent orthogonal coils (200) overlap to form a first overlapping region (211) and a second overlapping region (212); The first overlapping region (211) and the second overlapping region (212) correspond to the same linear coil (100).

5. The coil assembly according to claim 4, characterized in that, The linear coil (100) is symmetrical about the line connecting the orthogonal centers of the two orthogonal coils (200).

6. The coil assembly according to any one of claims 4-5, characterized in that, An opening is provided at least one of the following intersections: the intersection of the orthogonal coil (200), the intersection formed by the overlap of two adjacent orthogonal coils (200), and the intersection formed by the overlap of the linear coil (100) and the orthogonal coil (200); The coil assembly includes a jumper connector (300), through which the opening is connected.

7. The coil assembly according to claim 3, characterized in that, The jumper connector (300) is made of FR-4 epoxy fiberglass cloth substrate with copper cladding.

8. The coil assembly according to any one of claims 1-2, 4-5, and 7, characterized in that, The substrate is a flexible circuit board.

9. The coil assembly according to claim 8, characterized in that, The flexible circuit board is made of FR-4 epoxy fiberglass cloth.

10. A method for manufacturing a coil assembly, characterized in that, Includes the following steps: A linear coil (100) and an orthogonal coil (200) are prefabricated on a substrate to form a single unit; the single unit includes an opening located at the intersection of the linear coil (100) and / or the orthogonal coil (200); Connect the openings on the linear coil (100) and / or the quadrature coil (200) using jumper connectors.

11. A magnetic resonance imaging device, characterized in that, Includes the coil assembly as described in any one of claims 1-3; And / or, including the coil assembly as described in any one of claims 4-6.

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