CN210401638U

CN210401638U - Magnetic resonance coil

Info

Publication number: CN210401638U
Application number: CN201920865781.9U
Authority: CN
Inventors: 陈莲
Original assignee: Shanghai United Imaging Healthcare Co Ltd
Current assignee: Shanghai United Imaging Healthcare Co Ltd
Priority date: 2019-06-11
Filing date: 2019-06-11
Publication date: 2020-04-24
Anticipated expiration: 2029-06-11

Abstract

The utility model relates to a magnetic resonance imaging technical field especially relates to a magnetic resonance coil, include: the coil unit includes a flexible substrate and a plurality of coil units disposed on the flexible substrate. The flexible substrate comprises a first surface and a second surface which are oppositely arranged, and a plurality of through holes are formed in the flexible substrate. At least one coil unit in the plurality of coil units comprises a coil body, one end of the coil body sequentially penetrates all or part of the through holes so that one part of the coil body is located on the first surface, and the other part of the coil body is located on the second surface. A plurality of perforations are formed in the flexible substrate and can be combined to form any desired shape in the flexible substrate. Then directly pass the coil body from a plurality of perforation upper and lower intervals in proper order, need not rely on other auxiliary structure, can fix the coil body on flexible substrate to the design form of required coil unit is presented completely, and preparation technology is simple, and the reproducibility is strong.

Description

Magnetic resonance coil

Technical Field

The utility model relates to a magnetic resonance imaging technical field especially relates to a magnetic resonance coil.

Background

Existing magnetic resonance receive coils typically employ a phased array design in which each array element is a loop coil. The loops are usually made of copper foil or copper wire, and the array formed by these loops can be fixed on a carrier made of a rigid or flexible printed circuit board.

Generally, the annular coil is combined on a carrier made of a flexible printed circuit board by using a bonding technology and the like to manufacture the flexible coil, and the processing mode has high requirements on the processing technology.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a magnetic resonance coil for solving the problems of complicated processing technique and high requirement on the processing technique of the conventional flexible coil.

A magnetic resonance coil is used for receiving magnetic resonance signals and comprises a flexible base material and a plurality of coil units arranged on the flexible base material, wherein the coil units extend along a first direction and a second direction respectively and are sequentially and adjacently distributed, the flexible base material comprises a first surface and a second surface which are oppositely arranged, and a plurality of through holes are formed in the flexible base material; at least one coil unit in the plurality of coil units comprises a coil body, one end of the coil body sequentially penetrates all or part of the through holes so that one part of the coil body is located on the first surface, and the other part of the coil body is located on the second surface.

In one embodiment, the coil bodies of at least two adjacent coil units have an overlap region, and the coil body portions corresponding to the overlap region are physically isolated from each other.

In one embodiment, at least one perforation is present in the overlap region, through which the coil bodies of at least two adjacent coil units pass.

In one embodiment, the coil body includes a coaxial line structure, and an insulating layer is coated outside the coaxial line structure.

In one embodiment, the coil body includes:

a conductor; and

at least one conductor layer disposed in parallel with the conductor, the at least one conductor layer capable of electrically coupling with the conductor.

In one embodiment, the shape of the at least one coil unit comprises at least one of a circle, a rectangle, an ellipse, a polygon, a butterfly, and a saddle shape.

In one embodiment, the magnetic resonance coil further comprises a flexible wrapping material and a shell mounted on the flexible wrapping material, the flexible wrapping material wraps the flexible base material and the plurality of coil units, and the shell is used for accommodating the adjusting circuit connected with the coil body.

In one embodiment, the housing is provided with a hand-held hole, and the hand-held hole penetrates through the housing.

In one embodiment, the shell comprises a first shell and a second shell which are buckled with each other, the first shell and the second shell are respectively positioned at two sides of the flexible wrapping material, and the part of the flexible wrapping material can be clamped and fixed between the first shell and the second shell through the mutual buckling of the first shell and the second shell.

In one embodiment, the flexible substrate is made of at least one of leather, cloth, or plastic.

The beneficial effects of the utility model include:

a plurality of perforations are formed in the flexible substrate and can be combined to form any desired shape in the flexible substrate. And then, the coil body is directly and sequentially penetrated through the plurality of through holes at intervals up and down, so that one part of the coil body is positioned on the first surface, and the other part of the coil body is positioned on the second surface. Therefore, the coil body can be fixed on the flexible base material without other auxiliary structures, the required design form of the coil unit is completely presented, the manufacturing process is simple, and the reproducibility is strong. The coil body adopts and is different from the single conductor structure of prior art, but adopts the coaxial line structure that central conductor and outer conductor layer formed, and the bending performance of coil body, reliability contrast the flexible circuit board that current flexible coil used are better to magnetic resonance coil can use more soft flexible substrate to make and form, and magnetic resonance coil is better when using from this the laminating nature.

Drawings

Fig. 1 is a schematic structural diagram of a magnetic resonance coil according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of the structure of FIG. 1 at the edge;

FIG. 3 is an enlarged partial view of the overlap region of the structure of FIG. 1;

FIG. 4 is a schematic structural view of the coil body in the configuration shown in FIG. 3;

fig. 5 is a schematic structural diagram of a magnetic resonance coil according to another embodiment of the present invention;

fig. 6 is a schematic structural diagram of a magnetic resonance coil according to still another embodiment of the present invention.

Description of reference numerals:

10-a magnetic resonance coil;

100-a flexible substrate;

101-a first surface; 102-a second surface;

110-perforation;

200-a coil unit;

210-a coil body; 211-a conductor; 212-a conductor layer;

300-flexible wrapping material;

400-a housing; 410-hand held hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the magnetic resonance coil of the present invention is further described in detail by the following embodiments in combination with the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Referring to fig. 1 and 2, an embodiment of the invention provides a magnetic resonance coil 10 for receiving a magnetic resonance signal. The magnetic resonance coil 10 includes a flexible base material 100 and a plurality of coil units 200 provided on the flexible base material 100. The plurality of coil units 200 extend along the first direction and the second direction respectively and are adjacently distributed in sequence, that is: each of the plurality of coil units 200 extends in a first direction, a second direction; meanwhile, two or more of the plurality of coil units 200 are adjacently distributed in sequence along the first direction; two or more of the plurality of coil units 200 are adjacently arranged in sequence along the second direction. The flexible substrate 100 includes a first surface 101 and a second surface 102 disposed opposite to each other, and the flexible substrate 100 is provided with a plurality of through holes 110. At least one coil unit 200 of the plurality of coil units 200 includes a coil body 210, and one end of the coil body 210 sequentially passes through all or part of the through holes 110 so that a part of the coil body 210 is located on the first surface 101, and another part of the coil body 210 is located on the second surface 102.

It is understood that the flexible substrate 100 is made of a flexible material. In one embodiment, the flexible substrate 100 is made of one or more of leather, cloth, or plastic. The use of a leather material, such as PU, makes the flexible substrate 100 soft and conformable, which facilitates the magnetic resonance coil 10 to be conformable to a region of a human body to be scanned during use. Of course, the flexible substrate 100 may be made of a fabric such as cotton wool, chemical fiber, wool fabric, or fiber cloth, or a plastic such as soft glue. It should be noted that the flexible substrate 100 according to the embodiment of the present invention has a flexible characteristic, but does not have a tensile elastic property, so that when the coil body 210 is inserted into each perforation 110 and fixed to the flexible substrate 100, the coil body 210 is prevented from being easily pulled to cause a change in the performance of the magnetic resonance coil 10.

The coil body 210 may be in a linear shape, that is, the coil body 210 is similar to a coaxial cable, and may be inserted into each through hole 110 on the flexible substrate 100. The coil body 210 may be a flat ribbon cable or a cylindrical cable.

In the present embodiment, a plurality of through holes 110 are formed on the flexible substrate 100, and the plurality of through holes 110 may be combined to form any desired shape on the flexible substrate 100. The coil body 210 is then directly inserted through the plurality of through holes 110 in sequence at intervals up and down such that a portion of the coil body 210 is located on the first surface 101 while another portion of the coil body 210 is located on the second surface 102. Thus, the coil body 210 can be fixed on the flexible substrate 100 without using other auxiliary structures, and the required design form of the coil unit 200 is completely presented, the manufacturing process is simple, and the reproducibility is strong. And because the bending performance and the reliability of the coil body 210 are better than those of a flexible circuit board used by the existing flexible coil, the magnetic resonance coil 10 can be manufactured by using a softer flexible base material 100, and the magnetic resonance coil 10 has better conformability when in use.

Referring to fig. 1, as an implementation manner, the coil bodies 210 of at least two adjacent coil units 200 have an overlapping area, and the coil bodies 210 corresponding to the overlapping area are physically isolated from each other. In this embodiment, the coil bodies 210 of the adjacent coil units 200 are partially overlapped, so that the coil decoupling requirement can be satisfied, and the mutual inductance between the coil units 200 can be reduced. Referring to fig. 3, in one embodiment, there is at least one perforation 110 in the overlap region, the perforation 110 passing through the coil bodies 210 of at least two adjacent coil units 200. In this embodiment, the coil bodies 210 of at least two coil units 200 are simultaneously present in the same through hole 110, and at least two coil bodies 210 in the through hole 110 are physically separated from each other. Therefore, the coil decoupling requirement can be met, and the process can be simplified.

Referring to fig. 1, in one embodiment, the shape of at least one coil unit 200 includes at least one of a circle, a rectangle, an ellipse, a polygon, a butterfly, and a saddle shape. As shown in fig. 1, the magnetic resonance coil 10 includes two circular coil units 200. It is understood that, in two or more coil units 200, each coil unit 200 may have the same shape, for example, a circular shape, or a rectangular shape. Or the coil units 200 may be different shapes, for example, one coil unit 200 is circular, the other coil unit 200 is elliptical or rectangular, and so on.

As an implementation manner, the coil body 210 includes a coaxial line structure, and an insulating layer is coated outside the coaxial line structure. Referring to fig. 4, the coil body 210 illustratively includes a conductor 211 and at least one conductor layer 212, the at least one conductor layer 212 being disposed in parallel with the conductor 211, the at least one conductor layer 212 being capable of electrically coupling with the conductor 211. The at least one conductor layer 212 being arranged in parallel with the conductor 211 means that the at least one conductor layer 212 coincides with the extension direction of the conductor 211. It is understood that the conductor 211 and the at least one conductor layer 212 may be clad with an insulating layer (not shown) on the outside. In this embodiment, the coil body 210 forms the transmission cable by using the conductor 211 and the conductor layer 212, and the conductor 211 and the conductor layer 212 can reach a resonance state, so that a current in the transmission cable flows between the conductor 211 and the conductor layer 212, thereby increasing the length of the equivalent transmission cable, reducing the size of the coil at the same resonance frequency, and reducing the cost. Referring to fig. 4, in an embodiment, the plurality of conductor layers 212 are formed as a plurality of conductor layers 212, the plurality of conductor layers 212 form a conduit sleeved outside the conductor 211, and the conduit and the conductor 211 form a coaxial structure. In other embodiments, the number of the conductive layers 212 is plural, and the plurality of conductive layers 212 and the conductor 211 may form a microstrip line structure.

Referring to fig. 1, as an implementation manner, a plurality of through holes 110 enclose at least one closed figure. The closed figure may be designed according to the size and shape of the coil unit 200 as needed. In particular, a digitally controlled machine may be used to perforate the flexible substrate 100 to form closed figures of a desired size and shape. When the coil body 210 sequentially passes through the respective through holes 110, the coil unit 200 corresponding to the size and shape of the closed figure is formed. As shown in fig. 1, fig. 1 shows a coil unit 200 in which a coil body 210 is fixed to a flexible base material 100 in a circular closed pattern to form a circular shape. In the embodiment shown in fig. 1, the magnetic resonance coil 10 comprises two circular coil units 200.

In one embodiment, the shape of the at least one closed figure comprises at least one of a circle, a rectangle, an ellipse, a polygon, a butterfly, and a saddle shape. It is understood that when the plurality of perforations 110 in the flexible substrate 100 form a closed figure, the shape of the closed figure can be circular, rectangular, oval, butterfly, saddle-shaped, or any other polygonal shape. When the plurality of through holes 110 on the flexible substrate 100 form two or more closed figures, each closed figure may have the same shape, for example, a circular shape, or a rectangular shape. Or the closed figures may be different shapes, for example, one of the closed figures is a circle, the other closed figure is an ellipse or a rectangle, etc.

In one embodiment, the plurality of perforations 110 enclosing the same closed pattern are equally spaced. This facilitates the machining of the individual perforations 110. The spacing between the plurality of perforations 110 in the same closed figure can be designed according to actual needs. Of course, the spacing between the plurality of perforations 110 may also be unequal.

Referring to fig. 1, in one embodiment, when the plurality of perforations 110 form two or more closed figures, there is a partial overlap between adjacent closed figures. In this embodiment, adjacent closed patterns are partially overlapped, and when each coil body 210 is fixed on the flexible substrate 100 along the path of each closed pattern to form a plurality of coil units 200, the adjacent coil units 200 are also partially overlapped, so that the requirement of coil decoupling can be met, and the mutual inductance between the coil units 200 can be reduced.

Referring to fig. 5, as one implementable manner, the magnetic resonance coil 10 further includes a flexible wrapping material 300 and a case 400 mounted on the flexible wrapping material 300. The flexible packing material 300 is packed outside the flexible base material 100 and the plurality of coil units 200. The case 400 is used to accommodate a regulating circuit connected to the coil body 210. The flexible wrapping material 300 may be PU or a material with similar softness. The conditioning circuit may include, but is not limited to, at least one of a matching circuit, an amplifier, or a switching circuit. Through setting up flexible wrapping material 300, strengthen magnetic resonance coil's structural strength, prolong its life. By providing the case 400, the case 400 can serve as a protection device for the adjustment circuit, and protect the circuit of the magnetic resonance coil 10.

The housing 400 may have various configurations. Referring to fig. 5, in one embodiment, the housing 400 includes a first housing and a second housing that are fastened to each other, and the first housing and the second housing are respectively located at both sides of the flexible wrapping material 300. The portion of the flexible wrapping material 300 can be sandwiched and fixed between the first and second housings by the mutual engagement of the first and second housings. It is understood that after the first housing and the second housing are fastened, the first housing and the second housing may be further fastened and connected by a fastener such as a screw. By designing the housing 400 as a split structure including the first housing and the second housing, it is possible to facilitate installation and maintenance of the circuit inside the housing 400, and at the same time, to facilitate fixed installation of the housing 400 and the flexible wrapping material 300. In other embodiments, the housing 400 may be a unitary structure. Portions of flexible wrapping 300 may be secured to housing 400 directly with fasteners such as screws.

Referring to fig. 6, in one embodiment, a hand holding hole 410 is formed on the housing 400, and the hand holding hole 410 penetrates through the housing 400. By providing the hand-held bore 410, it is convenient to hold the hand, thereby facilitating the user's carrying of the magnetic resonance coil 10.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A magnetic resonance coil for receiving a magnetic resonance signal, the magnetic resonance coil (10) comprising a flexible substrate (100) and a plurality of coil units (200) disposed on the flexible substrate (100), the plurality of coil units (200) extending along a first direction and a second direction respectively and being adjacently disposed in sequence, the flexible substrate (100) comprising a first surface (101) and a second surface (102) disposed opposite to each other, and the flexible substrate (100) being provided with a plurality of perforations (110);

at least one coil unit (200) of the plurality of coil units (200) comprises a coil body (210), and one end of the coil body (210) sequentially passes through all or part of the through holes (110) so that one part of the coil body (210) is located on the first surface (101) and the other part of the coil body (210) is located on the second surface (102).

2. The magnetic resonance coil as set forth in claim 1, wherein coil bodies (210) of at least two adjacent coil units (200) have an overlap region, and portions of the coil bodies (210) corresponding to the overlap region are physically isolated from each other.

3. The magnetic resonance coil as set forth in claim 2, characterized in that at least one perforation (110) is present in the overlap region, which perforation (110) passes through the coil bodies (210) of at least two adjacent coil units (200) inside.

4. The magnetic resonance coil as set forth in claim 1, wherein the coil body (210) includes a coaxial line structure, and an outer portion of the coaxial line structure is covered with an insulating layer.

5. The magnetic resonance coil as set forth in claim 4, wherein the coil body (210) includes:

a conductor (211); and

at least one conductor layer (212) arranged in parallel with the conductor (211), the at least one conductor layer (212) being electrically couplable with the conductor (211).

6. The magnetic resonance coil as set forth in claim 1, wherein the shape of at least one of the coil units (200) includes at least one of a circle, a rectangle, an ellipse, a polygon, a butterfly, and a saddle shape.

7. The magnetic resonance coil of any one of claims 1 to 6, further comprising a flexible wrapping material (300) and a housing (400) mounted on the flexible wrapping material (300), wherein the flexible wrapping material (300) is wrapped outside the flexible base material (100) and the plurality of coil units (200), and the housing (400) is used for accommodating a regulating circuit connected with the coil body (210).

8. The magnetic resonance coil as set forth in claim 7, wherein a hand-held hole (410) is opened in the housing (400), and the hand-held hole (410) penetrates through the housing (400).

9. The magnetic resonance coil of claim 7, wherein the housing (400) comprises a first housing and a second housing which are fastened to each other, the first housing and the second housing are respectively located at two sides of the flexible packaging material (300), and a portion of the flexible packaging material (300) can be clamped and fixed between the first housing and the second housing by the fastening of the first housing and the second housing to each other.

10. The magnetic resonance coil as set forth in claim 1, wherein the flexible substrate (100) is at least one of a leather material, a cloth material, or a plastic material.