阅读说明：本技术 大体线圈及其制造方法、扫描设备 (Large coil, manufacturing method thereof and scanning equipment ) 是由 钱悦 王轶楠 许启林 徐勤 于 2019-09-30 设计创作，主要内容包括：本申请公开一种大体线圈及其制造方法、扫描设备。所述大体线圈包括具有筒壁的筒体和线圈单元。所述线圈单元位于所述筒体的筒壁内部。由于本申请将线圈单元设置于所述筒体的筒壁内部,增大了线圈单元与梯度线圈的屏蔽层的距离,提高了大体线圈的射频性能。(The application discloses a general coil, a manufacturing method thereof and a scanning device. The generally coiled wire includes a barrel having a barrel wall and a coil unit. The coil unit is located inside the cylinder wall of the cylinder. Because the coil unit is arranged in the cylinder wall of the cylinder body, the distance between the coil unit and the shielding layer of the gradient coil is increased, and the radio frequency performance of the general coil is improved.)

1. A substantially coiled wire comprising a barrel having a barrel wall and a coil unit, wherein the coil unit is located inside the barrel wall of the barrel.

2. The general coil of claim 1 wherein said cylindrical wall includes an outer surface, said coil unit being spaced from said outer surface by a distance 1/5-4/5 of the thickness of the cylindrical wall.

3. The solenoid coil of claim 2 wherein said coil unit is spaced from the outer surface of said cylindrical wall by 1/2 the thickness of the cylindrical wall.

4. The generally coiled wire of claim 1, wherein the cylinder comprises first and second cylinders nested together, the coil unit being located between the first and second cylinders.

5. The solenoid coil of claim 1 wherein said barrel comprises a plastic layer and a barrel body, said coil unit being located between the plastic layer and the barrel body.

6. The solenoid coil according to any one of claims 1 to 5, wherein said coil unit comprises a coil unit interface, and said barrel surface is milled with a connection hole site for exposing said coil unit interface.

7. A substantially coiled wire according to any of claims 1 to 5, wherein the barrel is frustoconical, cylindrical, frustoconical, or has an oval or gourd-shaped cross-section.

8. A scanning device comprising a gradient coil, characterized in that it further comprises a general coil as claimed in any one of claims 1 to 6, which is mounted in the gradient coil.

9. A method of manufacturing a substantially coil comprising a coil unit, the method comprising the steps of:

forming a cylinder framework;

coating a coil unit on the cylinder body framework;

forming a cladding layer on the bobbin skeleton clad with the coil units to form a substantially coil intermediate member;

and processing the general coil middleware to form a connecting hole position on the outer surface of the middleware for exposing the interface of the coil unit to form the general coil.

10. The method of manufacturing a substantially coil as claimed in claim 9, wherein the connection hole site is formed by milling an outer surface of the substantially coil intermediate body.

Technical Field

The present application relates to the field of magnetic resonance technology, and in particular, to a bucky coil, a method of manufacturing the bucky coil, and a scanning apparatus.

Background

Magnetic resonance coils in general are an important component of a magnetic resonance system, and mainly function to transmit and receive signals. The general coil 1 is mainly composed of a cylinder 11 and a coil unit. The coil unit is fixed on the outer surface of the cylinder 11. Generally, the general coil will be mounted inside the gradient coil 2. The inner surface of the gradient coil 2 is provided with a shielding layer 3. The distance of the shield 3 from the coil unit of the general coil is very important. The larger the distance, the better the radio frequency parameters of the general coil.

Disclosure of Invention

To overcome some or all of the problems of the related art, the present application provides a general coil. The general coil includes a barrel having a barrel wall and a coil unit. The coil unit is located inside the cylinder wall of the cylinder.

Optionally, the cylinder wall comprises an outer surface, and the distance between the coil unit and the outer surface is 1/5-4/5 of the thickness of the cylinder wall.

Optionally, the coil unit is spaced from the outer surface of the cylinder wall by 1/2 the thickness of the cylinder wall.

Optionally, the cylinder includes a first cylinder and a second cylinder which are sleeved with each other, and the coil unit is located between the first cylinder and the second cylinder.

Optionally, the barrel comprises a plastic layer and a barrel body, and the coil unit is located between the plastic layer and the barrel body.

Optionally, the coil unit includes a coil unit interface, and a connection hole for exposing the coil unit interface is milled on the surface of the cylinder.

Optionally, the cylinder is in a shape of a circular truncated cone, a cylinder, or a frustum, or the cross section of the cylinder is in an oval shape or a gourd shape.

In another aspect, the present application also provides a scanning apparatus comprising a gradient coil and a general coil of any of the preceding, the general coil being mounted within the gradient coil.

Another aspect of the present application discloses a method of manufacturing a substantially coil, the substantially coil including a coil unit, the method including the steps of: forming a cylinder framework; coating a coil unit on the cylinder body framework; forming a cladding layer on the bobbin skeleton clad with the coil units to form a substantially coil intermediate member; and processing the general coil middleware to form a connecting hole position on the outer surface of the middleware for exposing the interface of the coil unit to form the general coil.

Optionally, the connection hole site is formed by milling an outer surface of the substantially coil intermediate body.

The technical scheme provided by the embodiment of the application at least comprises the following beneficial effects:

because the coil unit is arranged in the cylinder wall of the cylinder body, the distance between the coil unit and the shielding layer of the gradient coil is increased, and the radio frequency performance of the general coil is improved. Compared with the mode of enlarging the inner diameter of the gradient coil, the gradient coil does not become large as a whole, the magnet does not become large, and the cost is not increased. Compared with the mode of reducing the inner diameter of the general coil under the condition that the wall thickness of the cylinder body of the general coil is not changed, the inner diameter of the general coil cannot be reduced, and the comfort of a patient is ensured. Compared with the mode of reducing the outer diameter of the general coil under the condition that the inner diameter of the cylinder of the general coil is not changed, the mechanical properties of the rigidity and the strength of the general coil can meet the requirements, and the normal scanning work cannot be influenced.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

FIG. 1 is a schematic structural view of a general coil, gradient coil and magnet assembly;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is a schematic view of a first general coil configuration;

FIG. 4 is a schematic diagram of a barrel armature formed in a method of manufacturing a generally coiled wire;

FIG. 5 is a schematic diagram of a generally coiled wire formed in a method of manufacturing a generally coiled wire;

FIG. 6 is a schematic diagram of a second general coil configuration;

FIG. 7 is a schematic view of another angular configuration of the general coil shown in FIG. 6;

FIG. 8 is a schematic view of a cartridge;

fig. 9 is a schematic structural view of another cartridge.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the terms "first," "second," and the like as used in the description and in the claims, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Similarly, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one; "plurality" means two or more than two. Unless otherwise indicated, "front", "rear", "lower" and/or "upper" and the like are for convenience of description and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items.

Exemplary embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following embodiments, features of the embodiments can be supplemented with each other or combined with each other without conflict.

As shown in fig. 3 to 5 in conjunction with fig. 1 and 2, a general coil 1 includes a cylinder 11 and a coil unit 12. The barrel 11 includes a barrel wall 111. The shape of the cylinder 11 is various, for example, cylindrical. The coil unit 12 is located inside the cylindrical wall 111 of the cylindrical body 11. In this way, the distance of the coil unit 12 from the shielding of the gradient coil is increased, improving the radio-frequency performance of the general coil 1. Compared with the method of enlarging the inner diameter of the gradient coil 2, the gradient coil 2 as a whole is not enlarged, the magnet 4 is not enlarged, and the cost is not increased. Compared with the mode of reducing the inner diameter of the general coil 1 under the condition that the wall thickness of the barrel body 11 of the general coil 1 is not changed, the inner diameter of the general coil 1 is not reduced, and the comfort of a patient is ensured. Compared with the mode of reducing the outer diameter of the general coil 1 under the condition that the inner diameter of the cylinder body 11 of the general coil 1 is not changed, the mechanical properties of the rigidity and the strength of the general coil 1 can meet the requirement, and the normal scanning work can not be influenced. Taking the outer surface of the cylinder wall 111 of the cylinder 11 as a reference, the distance between the coil unit 12 and the outer surface is 1/5-4/5 of the thickness of the cylinder wall 111, such as 1/5, 3/10, 2/5, 1/2, 3/5 or 4/5. More specifically, if the thickness of the cylindrical wall 111 is 10cm, the distance between the coil unit 12 and the outer surface is 2cm to 8cm, such as 2cm, 3cm, 3.5cm, 4cm, 5cm, 5.5cm, 6cm, 6.5cm, 7cm, 7.5cm, 8cm, 8.2cm, 9cm, 9.5cm, and 10 cm. If the thickness of the cylinder wall 111 is 5cm, the distance of the coil unit 12 from the outer surface is between 1cm and 5cm, for example, 1cm, 1.5cm, 2cm, 2.2cm, 2.5cm, 3cm, 4cm, 4.5cm, 5 cm. In one embodiment, the coil unit 12 is spaced from the outer surface of the cylindrical wall 111 by 1/2 times the thickness of the cylindrical wall. By taking into account the distance between the coil unit 12 and the outer surface of the cylinder wall 111, the mechanical properties of the stiffness and strength of the general coil can be made better.

As shown in fig. 3 to 5, a method of manufacturing a general coil is as follows:

s1, forming a cylinder framework 13; typically, the shape of the barrel skeleton 13 is determined according to the final barrel shape, for example, if the barrel is cylindrical, then the barrel skeleton is cylindrical. The process for forming the cylinder body framework can adopt an injection molding process or a glue pouring process.

S2, coating the coil unit 12 on the cylinder framework 13; in this step, the coil unit 12 is not limited to a PCB board, a copper sheet, or the like, and should be regarded as one component. The position of the coil unit 12 is determined according to a specific design. Each coil unit 12 can be fixed on the bobbin framework by various fixing methods such as glue bonding, screw fixing and the like. Since there are a plurality of coil units 12, after all the coil units 12 are fixed to the bobbin 13, the coils 12 are covered on the outer surface of the bobbin 13.

S3, forming a coating layer on the cylindrical frame 13 coated with the coil unit 12 to form a substantially coil intermediate member. The bobbin 13 coated with the coil unit 12 may be processed by winding, potting, or injection molding, for example, the bobbin 13 is processed to a thickness required by design to form a substantially coil intermediate member (the intermediate member includes the bobbin), and thus the coil unit 12 is buried inside the bobbin.

S4, processing the substantially coil intermediate member to form the connection hole site 14 on the outer surface of the intermediate member, through which the interface of the coil unit 12 is exposed, to form the substantially coil 1. The connection hole sites serve as an interface of the coil unit 12 with an external circuit, so that a circuit board (PCB board) of the coil unit 12 can be connected with the external circuit. The connection hole site is not limited to various shapes and depths, and is not limited to a recess or a protrusion. In one embodiment, the outer surface of the substantially coil intermediate member is milled until the copper layer of the PCB board of the coil unit 12 is exposed. A lead is soldered to the copper layer and a connection to an external circuit is made through the lead.

As shown in fig. 6 and 7, in one embodiment, the cylinder 11 includes a first cylinder 1a and a second cylinder 1b which are sleeved with each other. The outer diameter of the first cylinder 1a is equal to the inner diameter of the second cylinder 1 b. The coil unit 12 is located between the first cylinder 1a and the second cylinder 1 b. For example, the coil unit 12 may be attached to the outer surface of the first cylinder 1a and then fitted to the second cylinder 1b, or the coil unit 12 may be attached to the inner surface of the second cylinder 1b and then fitted to the first cylinder 1 a; of course, the coil unit 12 may be mounted on the outer surface of the first cylinder 1a but protruded from the outer surface of the first cylinder 1a, and the accommodating groove may be provided at a corresponding position of the second cylinder 1 b. After the first cylinder 1a and the second cylinder 1b are sleeved, the part of the coil unit 12 protruding from the outer surface of the first cylinder 1a is located in the accommodating groove. By positioning the coil unit 12 between the first cylinder 1a and the second cylinder 1b, the purpose of increasing the distance between the coil unit 12 and the shield of the gradient coil can also be achieved. In the general coil having such a configuration, the connection hole 14 for connecting the coil unit 12 to an external circuit may be formed by milling the outer surface of the second cylindrical body 1 b.

In one embodiment, the cartridge 11 comprises a plastic layer and a cartridge body. The coil unit 12 is located between the plastic layer and the barrel body. This also increases the distance between the coil unit 12 and the shield. The shape of the can 11 formed by the plastic layer and the can body may be cylindrical, truncated cone, or the like, as described above. In the general coil of this structure, the outer surface of the cylinder body may also be formed with the connection hole sites by a milling process.

In another aspect, a scanning apparatus, such as a magnetic resonance scanning apparatus, is disclosed. Such an apparatus comprises a gradient coil and a general coil of any of the foregoing. A general coil is mounted within the gradient coil. As to how to install, the prior art can be adopted, and details are not described.

In the above embodiment, the cylindrical body 11 is described as an example of a cylindrical shape, and it is understood by a skilled person that the cylindrical body 11 may be a circular truncated cone shape, a cylindrical shape, a truncated cone shape, or, as shown in fig. 8, a cross section of the cylindrical body may be an elliptical shape in which a difference between a major axis and a minor axis is not particularly large, or a gourd-like shape as shown in fig. 9. The gourd-like shape means that the upper portion is smaller than the lower portion and has a gourd-like shape as shown in fig. 9.

Although the present application has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application, and all changes, substitutions and alterations that fall within the spirit and scope of the application are to be understood as being covered by the following claims.