Magnetic resonance flexible coil assembly

Abstract

The present application relates to the field of magnetic resonance technology, and in particular to a magnetic resonance flexible coil assembly, comprising: a deformable flexible support body, comprising a first flexible material layer and a second flexible material layer stacked with the first flexible material layer; a radio frequency coil, comprising a coil ring and a circuit board, wherein the coil ring and the circuit board are both arranged between the first flexible material layer and the second flexible material layer, and are fixed to the first flexible material layer in a stacked manner, and the coil ring is configured to deform following the deformation of the flexible support body; wherein the edge of the circuit board has an inwardly concave conductive recess, the conductive recess receives an end of the coil ring, and is welded and fixed to the end, and the end extends along the board surface direction of the first circuit board.

Description

Technical Field

[0001] The present application relates to the field of magnetic resonance technology, and in particular to a magnetic resonance flexible coil assembly. Background Art

[0002] Patent document with publication number CN109937367A (hereinafter referred to as Patent Document 1) discloses a radio frequency coil array assembly, which includes a plurality of radio frequency coils, each of which includes a coil ring and a coupling electronic device unit (circuit board) electrically connected to the coil ring. However, Patent Document 1 does not describe the connection method between the coil ring and the coupling electronic device unit in words. Figure 7 It can be seen that the end of the coil ring is attached to the side surface of the circuit board. However, such a structure is not conducive to the application and coordination of the coil ring and the flexible material layer. When the main part of the coil ring is sewn and applied to the flexible material layer, the coil ring will have obvious bending deformation at the connection part between it and the circuit board, and the connection part is prone to be under stress for a long time. Therefore, it is easy to cause the coil ring to be accidentally detached from the circuit board, especially when the flexible material layer is deformed due to the force applied. Summary of the invention

[0003] In view of this, the present application provides a magnetic resonance flexible coil assembly.

[0004] In a first aspect, a magnetic resonance flexible coil assembly is provided, comprising:

[0005] A deformable flexible support body, comprising a first flexible material layer and a second flexible material layer stacked with the first flexible material layer;

[0006] A radio frequency coil, comprising a coil ring and a circuit board, wherein the coil ring and the circuit board are both arranged between the first flexible material layer and the second flexible material layer and are laminated and fixed to the first flexible material layer, and the coil ring is configured to deform following the deformation of the flexible support body;

[0007] The edge of the circuit board has an inwardly concave conductive recess, the conductive recess receives the end of the coil ring and is welded and fixed to the end, and the end extends along the board surface direction of the first circuit board.

[0008] In some possible implementations, the end portion includes a first end portion and a second end portion, and the conductive recess includes a first conductive recess corresponding to the first end portion and a second conductive recess corresponding to the second end portion.

[0009] In some possible implementations, the following further includes:

[0010] The suture is used to sew and fix the coil loop to the first flexible material layer in a manner of spanning the loop arms of the coil loop.

[0011] In some possible implementations, the coil ring includes:

[0012] an end adjacent section adjacent to the end;

[0013] The suture comprises:

[0014] A first stitch portion extends at the end abutment section and adjacent to the conductive recess to constrain the end abutment section to the first flexible material layer.

[0015] In some possible implementations, the coil ring includes:

[0016] an end away from the segment, adjacent to the end adjacent segment on a side of the end adjacent segment opposite to the end;

[0017] The suture comprises:

[0018] A second stitch portion extends at the end distal segment to constrain the end abutment segment to the first flexible material layer and allow the end distal segment to move within a specified range relative to the first flexible material layer.

[0019] In some possible implementations, the restraining force of the second suture portion on the end distal segment is smaller than the restraining force of the first suture portion on the end extension segment.

[0020] In some possible implementations, the second suture portion is in a relaxed state.

[0021] In some possible implementations, the first stitch portion allows the end abutment segment to move relative to the first flexible material layer within a range smaller than the prescribed range.

[0022] In some possible implementations, the second suture portion and the first flexible material layer define a second cavity for the distal end portion to pass through;

[0023] The radial dimension of the second cavity is larger than that of the end distal segment, and the radial dimension is a dimension along an extension direction of the first flexible material layer.

[0024] In some possible implementations, the first suture portion and the first flexible material layer define a first cavity penetrated by the end adjacent segment, and a size of the first cavity is equal to a cross-sectional size of the end adjacent segment.

[0025] In some possible implementations, the first suture portion is in a tensioned state and pulls the end adjacent segment toward the first flexible material layer.

[0026] According to the magnetic resonance flexible coil assembly provided by the present application, the end of the coil ring can be arranged in a relatively straight rather than curved state, and extend on the same plane as the circuit board, thereby helping to suppress the bending deformation of the end of the coil ring in the thickness direction of the circuit board 5, reducing the stress on the welding portion between the coil ring and the circuit board, and reducing the possibility of the welding portion becoming detached. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present application, rather than limiting the present application.

[0028] Figure 1 It is a schematic diagram of an exploded view of a flexible coil assembly provided in one embodiment of the present application.

[0029] Figure 2 yes Figure 1 A schematic diagram of the planar structure of the flexible coil assembly, in which components such as the radio frequency coil are shown in perspective.

[0030] Figure 3 Shown in stereogram Figure 1 The matching relationship between the medium radio frequency coil and the first flexible material layer.

[0031] Figure 4 Shows Figure 1 The matching relationship between the medium radio frequency coil and the first flexible material layer and the second flexible material layer.

[0032] Figure 5 yes Figure 1 A schematic structural diagram of the medium radio frequency coil, which corresponds to the viewing angle from the first flexible material layer to the second flexible material layer.

[0033] Figure 6 It is a schematic diagram of the cooperation between the first suture portion and the end adjacent section.

[0034] Figure 7 It is a schematic diagram of the cooperation between the second suture portion and the end away from the segment.

[0035] Description of reference numerals:

[0036] 100-flexible support, 200-RF coil;

[0037] 1, 2--Flexible material layer;

[0038] 3--coil loop, 3A, 3B--ends, 3C, 3D--ends adjacent to the segment, 3E--ends away from the segment;

[0039] 4--Electronic components;

[0040] 5, 6--circuit board, 5A, 5B--conductive depression;

[0041] 7, 8--sutures, 7L, 7R--first suture section, 7M--second suture section;

[0042] 9-conductive column;

[0043] 10, 11--Electronic devices;

[0044] 12, 13--cavity. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the embodiment of the present application will be clearly and completely described below in conjunction with the drawings of the embodiment of the present application. Obviously, the described embodiment is a part of the embodiment of the present application, rather than all the embodiments. Based on the described embodiment of the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of this application. It can be understood that, in the absence of conflict, some technical means of the various embodiments described herein can be replaced or combined with each other.

[0046] In the description of the specification and claims of this application, if there are terms such as "first", "second", etc., they are only used to distinguish the objects described and do not have any order or technical meaning. Therefore, the objects defined as "first", "second", etc. may explicitly or implicitly include one or more of the objects. In addition, "one" or "a" and similar words do not indicate a quantitative limitation, but indicate the existence of at least one, and "multiple" means no less than two.

[0047] Figures 1 to 7 A magnetic resonance flexible coil assembly (hereinafter, sometimes referred to as the assembly) provided according to an embodiment of the present application is shown, which includes a deformable flexible support body 100 and a plurality of radio frequency coils 200 supported by the flexible support body 100 .

[0048] The flexible support body 100 includes a flexible material layer 1 and a flexible material layer 2 arranged in a stacked manner, and the flexible material layer 1 and the flexible material layer 2 can be fixedly connected by sutures. In some embodiments, the flexible material layer 1 and the flexible material layer 2 can be connected as a whole at one side position of the two. For example, a large area of ​​the flexible material layer can be folded in half around the middle to obtain the flexible material layer 1 and the flexible material layer 2. In addition, the flexible material layer 1 and the flexible material layer 2 can be a multi-layer structure or a single-layer structure. For example, the flexible material layer 1 can include an outer fabric layer, an inner lining layer, and a flexible sponge layer sandwiched between the fabric layer and the lining layer.

[0049] When a subject is subjected to an MRI examination using the MRI coil assembly, one of the flexible material layer 1 and the flexible material layer 2 is in contact with the subject's body, while the other is away from the subject's body. Exemplarily, one of the flexible material layer 1 and the flexible material layer 2 may be the flexible material layer 1, and correspondingly, the other may be the flexible material layer 2, or vice versa.

[0050] A plurality of RF coils 200 may form a coil array. The RF coils 200 are disposed between the flexible material layer 1 and the flexible material layer 2 and fixed by sutures, so as to maintain a stable relative position between the flexible material layer 1 and the flexible material layer 2 .

[0051] In this embodiment, each RF coil 200 includes a coil ring 3 and an electronic component 4 electrically connected to the coil ring 3 .

[0052] The coil loop 3 is arranged between the flexible material layer 1 and the flexible material layer 2, and is fixed to the flexible material layer 1 by stitching 7 across the loop arm of the coil loop 3, and the coil loop 3 is stacked with the flexible material layer 1. The coil loop 3 is a flexible structure, so that it can deform following the deformation of the flexible support 100. In the present embodiment, the coil loop 3 is mainly formed by a flexible wire and extends over a range of approximately 340°. In other embodiments, the wire used to form the coil loop 3 is segmented at a position relative to the electronic component 4, and a capacitor is connected at the segment.

[0053] The coil ring 3 is electrically connected to the electronic component 4 , and the magnetic resonance signal induced by the coil ring 3 is processed by the electronic component 4 and then transmitted to the outside.

[0054] like Figure 3 and Figure 4As shown, the electronic assembly 4 includes a circuit board 5 (first circuit board) and a circuit board 6 (second circuit board) separated from each other, and the circuit board 5 and the circuit board 6 are mechanically fixed and electrically connected to each other via a conductive column 9. In detail, one end of the conductive column 9 is inserted into the conductive hole of the circuit board 5 and fixed by welding to the conductive hole, and the other end of the conductive column 9 is inserted into the conductive hole of the circuit board 6 and fixed by welding to the conductive hole, and the circuit board 5 is electrically connected to the circuit board 6 through the conductive column 9, thereby electrically connecting the coil ring 3, the electronic device 10 provided on the circuit board 5, and the electronic device 11 provided on the circuit board 6. The electronic device 10 may be an adjustable capacitor, and the electronic device 11 may be a preamplifier.

[0055] More specifically, the circuit board 5 has a through threading hole at the edge, and the suture 8 passing through the threading hole sews the circuit board 5 to the flexible material layer 1, and the circuit board is stacked with the flexible material layer 1. The aforementioned first electrical device is arranged on the side of the circuit board 5 away from the flexible material layer 1, and the aforementioned second electrical device is arranged on the side of the circuit board 6 facing the circuit board 5. In this way, the flexible material layer 1 and the flexible material layer 2 can be prevented from contacting the electronic device 10 on the second surface, and when the flexible support body 100 is deformed by the applied force, the electronic device 10 and the electronic device 11 can be effectively prevented from being damaged.

[0056] The aforementioned threading hole is Figure 3 , but the reference numerals are omitted.

[0057] In other embodiments, the circuit board 5 may also be fixed to the flexible material layer 1 via adhesive bonding.

[0058] As mentioned above, the coil ring 3 is electrically connected to the electronic component 4 so that the electronic component 4 processes the magnetic resonance signal sensed by the coil ring 3. Figure 3 and Figure 4 The edge of the circuit board 5 has two conductive recesses 5a and 5b (a first conductive recess 5a and a second conductive recess 5b) that are inwardly concave and electrically connected to the aforementioned electronic device 10. The two conductive recesses 5a and 5b receive the two ends 3a and 3b (a first end 3a and a second end 3b) of the coil ring 3 respectively, and are respectively conductively welded and fixed to the two ends 3a and 3b, and the two ends 3a and 3b of the coil ring 3 extend along the board surface direction of the circuit board 5. Through such a design, the ends 3a and 3b of the coil ring 3 can be arranged in a relatively straight (not bent) state and extend on the same plane as the circuit board 5, thereby helping to suppress the bending deformation of the ends 3a and 3b of the coil ring 3 in the thickness direction of the circuit board 5, reducing the force on the welding part of the coil ring 3 and the circuit board 5, and reducing the possibility of the welding part being detached.

[0059] For example, a metal coating electrically connected to the electronic device 10 via a conductive trace may be formed on the inner wall of the conductive recesses 5a, 5b, so that the conductive recesses 5a, 5b have conductivity. During assembly, the ends 3a, 3b of the coil ring 3 may be respectively inserted into the conductive recesses 5a, 5b, and then fixed by soldering.

[0060] In this embodiment, the two conductive recesses 5 a and 5 b are respectively formed on opposite sides of the circuit board 5 and open in opposite directions so as to better connect the two ends 3 a and 3 b of the coil ring 3 .

[0061] Please review Figure 5 The coil ring 3 also includes end adjacent segments 3c, 3d and an end away segment 3e, wherein the end adjacent segments 3c, 3d are respectively adjacent to the two ends 3a, 3b of the coil ring 3, and the end away segment 3e is adjacent to the end adjacent segment 3c on the side of the end adjacent segment 3c opposite to the end 3a, and is also adjacent to the end adjacent segment 3d on the side of the end adjacent segment 3d opposite to the end 3b.

[0062] Accordingly, the aforementioned stitches 7 include first stitch portions 7L, 7R and second stitch portions 7M. The first stitch portion 7L extends at the end adjacent segment 3c and near the conductive recess 5a to constrain the end adjacent segment 3c on the flexible material layer 1. The first stitch portion 7R extends at the end adjacent segment 3d and near the conductive recess 5b to constrain the end adjacent segment 3d on the flexible material layer 1. Through such a design, when the flexible support body 100 is deformed by the applied force, the first stitch portions 7L, 7R can at least to a certain extent limit the movement of the end adjacent segments 3c, 3d, respectively, reduce the force of the end adjacent segments 3c, 3d on the end portions 3a, 3b, thereby suppressing the force on the welding parts of the end portions 3a, 3b and the conductive recesses 5a, 5b, and reducing the risk of the end portions 3a, 3b detaching from the circuit board 5.

[0063] The second stitch portion 7M extends at the end away from the segment 3e to constrain the end away from the segment 3e on the flexible material layer 1. And the second stitch portion 7M allows the end away from the segment 3e to move within a specified range relative to the flexible material layer 1. Through such a design, when the flexible support body 100 is deformed by force, especially deformed to a large extent, the end away from the segment 3e of the coil ring 3 can move slightly relative to the flexible material layer 1, thereby helping to reduce (or release) the interaction force between the coil ring 3 and the flexible material layer 1, and preventing the coil ring 3 from being damaged due to excessive force.

[0064] exist Figure 5, the first stitch portion 7L includes three adjacent but separated stitch units, which stitch and fix the end adjacent segment 3c to the first flexible material layer 1 at three different positions. The first stitch portion 7R includes another three adjacent but separated stitch units, which stitch and fix the end adjacent segment 3d to the first flexible material layer 1 at three different positions. The second stitch portion 7M includes a plurality of stitch units adjacent to each other in sequence.

[0065] In this embodiment, the restraining force of the first stitching portions 7L, 7R on the extended segments of the end portions 3a, 3b is greater than the restraining force of the second stitching portion 7M on the segment 3e away from the end portion. Such first stitching portions 7L, 7R can well limit the movement of the end adjacent segments 3c, 3d relative to the flexible material layer 1, thereby reducing the risk of the end portions 3a, 3b being detached from the first conductive recesses 5a, 5b.

[0066] More specifically, see Figure 6 and Figure 7 Combined with Figure 5 , the first stitch portions 7L, 7R respectively define with the flexible material layer 1 a plurality of cavities 12 (first cavities) respectively penetrated by the end adjacent segments 3c, 3d, the plurality of cavities 12 corresponding to the first stitch portion 7L are sequentially arranged in the extending direction of the end adjacent segment 3c, and the plurality of cavities 12 corresponding to the first stitch portion 7R are sequentially arranged in the extending direction of the end adjacent segment 3d. In more detail, the aforementioned three stitch units of the first stitch portion 7L define with the flexible material layer 1 three cavities 12 sequentially arranged in the extending direction of the end adjacent segment 3c, and the aforementioned other three stitch units of the first stitch portion 7R define with the flexible material layer 1 another three cavities 12 sequentially arranged in the extending direction of the end adjacent segment 3d. The second stitch portion 7M defines with the flexible material layer 1 a plurality of cavities 13 (second cavities) penetrated by the end away from the segment 3e, and the plurality of cavities 13 are sequentially arranged in the extending direction of the end away from the segment 3e. In more detail, the aforementioned plurality of suture units of the second suture portion 7M and the flexible material layer 1 define a plurality of cavities 13. The radial dimension DD of each cavity 13 is greater than the radial dimension DD of the end away from the segment 3e, and the radial dimension DD is the dimension along the extension direction of the flexible material layer 1 (e.g., Figure 7 ), therefore, the second stitch portion 7M allows the end away from the segment 3e to move relative to the flexible material layer 1 in its cavity 13. The size of the cavity 12 is substantially the same as the cross-sectional size of the end adjacent segments 3c, 3d, therefore, the first stitch portions 7L, 7R can better limit the movement of the end adjacent segments 3c, 3d in their respective radial directions.

[0067] In some embodiments, the first suture portions 7L, 7R are in a tensioned state and pull the end adjacent segments 3c, 3d toward the flexible material layer 1, thereby, with the help of the friction between the suture 7 and the end adjacent segments 3c, 3d, the movement of the end adjacent segments 3c, 3d in their axial direction (that is, their extension direction) can be better limited.

[0068] In other embodiments, the restraining force of the first stitch portions 7L, 7R on the end adjacent segments 3c, 3d may be slightly smaller, but not less than the restraining force of the second stitch portion 7M on the end away from the segment 3e. In this case, the first stitch portions 7L, 7R may respectively allow the end adjacent segments 3c, 3d to move relative to the flexible material layer 1 within a range smaller than the aforementioned specified range.

[0069] In some embodiments, the second stitch portion 754 constrains the end away from the segment 3e in a relaxed state on the flexible material layer 1. Therefore, when the flexible support body 100 is deformed by a force applied thereto, the end away from the segment 3e has a certain displacement space.

Claims

1. A magnetic resonance flexible coil assembly, characterized in that: include: A deformable flexible support body, comprising a first flexible material layer and a second flexible material layer stacked with the first flexible material layer; A radio frequency coil, comprising a coil ring and a circuit board, wherein the coil ring and the circuit board are both arranged between the first flexible material layer and the second flexible material layer and are laminated and fixed to the first flexible material layer, and the coil ring is configured to deform following the deformation of the flexible support body; The edge of the circuit board has an inwardly concave conductive recess, the conductive recess receives the end of the coil ring and is welded and fixed to the end, and the end extends along the board surface direction of the circuit board.

2. The flexible coil assembly according to claim 1, characterized in that: The end portion includes a first end portion and a second end portion, and the conductive recess includes a first conductive recess corresponding to the first end portion and a second conductive recess corresponding to the second end portion.

3. The flexible coil assembly according to claim 1 or 2, characterized in that: Also includes: The suture is used to sew and fix the coil loop to the first flexible material layer in a manner of spanning the loop arms of the coil loop.

4. The flexible coil assembly according to claim 3, characterized in that: The coil ring comprises: an end adjacent section adjacent to the end; The suture comprises: A first stitch portion extends at the end abutment section and adjacent to the conductive recess to constrain the end abutment section to the first flexible material layer.

5. The flexible coil assembly according to claim 4, characterized in that: The coil ring comprises: an end away from the segment, adjacent to the end adjacent segment on a side of the end adjacent segment opposite to the end; The suture comprises: A second stitch portion extends at the distal end section to constrain the distal end section to the first flexible material layer and allow the distal end section to move within a specified range relative to the first flexible material layer.

6. The flexible coil assembly according to claim 5, characterized in that: The restraint force of the second suture portion on the distal end segment is smaller than the restraint force of the first suture portion on the adjacent end segment.

7. The flexible coil assembly according to claim 5, characterized in that: The second suture portion is in a relaxed state.

8. The flexible coil assembly according to claim 5, characterized in that: The first stitch portion allows the end abutment segment to move relative to the first flexible material layer within a range that is smaller than the specified range.

9. The flexible coil assembly according to claim 5, characterized in that: The second suture portion and the first flexible material layer define a second cavity for the distal end portion to penetrate; The radial dimension of the second cavity is larger than that of the end distal segment, and the radial dimension is a dimension along an extension direction of the first flexible material layer.

10. The flexible coil assembly according to claim 4, characterized in that: The first suture portion and the first flexible material layer define a first cavity penetrated by the end adjacent segment, and the size of the first cavity is equal to the cross-sectional size of the end adjacent segment.

11. The flexible coil assembly according to claim 4, characterized in that: The first suture portion is in tension and draws the end abutment segment toward the first layer of flexible material.

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