CN111175679B

CN111175679B - Shimming bracket assembly and shimming bracket assembly

Info

Publication number: CN111175679B
Application number: CN202010121290.0A
Authority: CN
Inventors: 房伟; 运晓靖
Original assignee: Neusoft Medical Systems Co Ltd; Shanghai Neusoft Medical Technology Co Ltd
Current assignee: Neusoft Medical Systems Co Ltd; Shanghai Neusoft Medical Technology Co Ltd
Priority date: 2020-02-26
Filing date: 2020-02-26
Publication date: 2022-04-01
Anticipated expiration: 2040-02-26
Also published as: CN111175679A

Abstract

The application discloses shimming bracket component and shimming bracket assembly. The shimming bracket component comprises a bracket body, a first base, a first tensioning block, a second base and a second tensioning block, wherein the first base and the first tensioning block form a first set of fittings suitable for launching a coil, the second base and the second tensioning block form a second group of fittings suitable for the gradient coil, the bracket body comprises a top end and a bottom end which are opposite, the first group of fittings and the second group of fittings are selected to be arranged on the bracket body, the tensioning block in each group of fittings is positioned at the top end, the base is positioned at the bottom end, therefore, only the first group of fittings or the second group of fittings are required to be arranged on the bracket body to form the shimming bracket suitable for the positioning reference, under the condition that the positioning reference needs to be changed, a shimming bracket does not need to be redesigned, and therefore the overall design and manufacturing cost is not increased.

Description

Shimming bracket assembly and shimming bracket assembly

Technical Field

The application relates to medical equipment, in particular to a shimming bracket component and a shimming bracket assembly.

Background

MR (Magnetic Resonance imaging, also called medical Magnetic Resonance imaging) technology has a high requirement on Magnetic field uniformity, which is the uniformity of Magnetic field intensity in a certain volume range, i.e. the uniformity of the number of Magnetic force lines passing through a unit area. The shimming support is used for fixing the magnetic field measuring device. The magnetic field measuring device is used for measuring the distribution of the magnetic field.

Typically, most shim holders have the transmit coil as a positioning reference when measuring the magnetic field distribution. If the positioning reference is changed (for example, the interior of the gradient coil is used as the positioning reference), a shim bracket needs to be redesigned, so that the overall design and manufacturing cost is increased.

Disclosure of Invention

To overcome some or all of the problems of the related art, the present application provides a shim bracket assembly. This shimming bracket component includes support body, first base, first tight piece that rises, second base and the tight piece that rises of second, wherein, first base with first tight piece that rises constitutes the first group accessory that is applicable to the transmitting coil, the tight piece of second base and second rises constitutes the second group accessory that is applicable to the gradient coil, the support body includes relative top and bottom, first group accessory with the alternative install in of second group accessory the support body and every group in the accessory the tight piece that rises is located the top, the base is located the bottom.

On the other hand, this application still provides a shimming support assembly. The shimming bracket assembly comprises a first shimming bracket, a second shimming bracket, an index plate and a magnetic field measuring device. The dividing disc is connected with the magnetic field measuring device, the dividing disc and the magnetic field measuring device are integrally connected with the first shimming bracket and the second shimming bracket, and the dividing disc drives the magnetic field measuring device to synchronously rotate. The first group of accessories and the second group of accessories of the shimming bracket assembly are alternatively arranged on the bracket body to form the first shimming bracket. The first group of fittings and the second group of fittings of the shimming bracket component are alternatively arranged on the bracket body to form the second shimming bracket.

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

the first group of accessories and the second group of accessories are selected to be installed on the support body, the tensioning block in each group of accessories is located at the top end, and the base is located at the bottom end, so that the first group of accessories installed on the support body are suitable for the situation that the positioning reference is the transmitting coil, and the second group of accessories installed on the support body are suitable for the situation that the positioning reference is the gradient coil. In addition, the first base, the first tensioning block, the second base and the second tensioning block are separated from the support body, can be packaged independently, and occupy small space.

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 diagram of a shimming bracket, which comprises a first base and a first tensioning block;

FIG. 2 is a schematic structural view of a second base;

fig. 3 is a schematic structural view of a second tensioning block;

FIG. 4 is a schematic structural view of a shim holder assembly;

FIG. 5 is a schematic view of the shim holder assembly of FIG. 4 positioned in a transmit coil;

fig. 6 is a schematic view of another shim holder assembly to be placed on a gradient coil, the shim holder assembly being formed by replacing the first base and the first tension block of the shim holder assembly shown in fig. 4 with the second base and the second tension block.

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.

Referring to fig. 1 to 3 in combination with fig. 4 to 6, a shim bracket assembly includes a bracket body 1a, a first base 2a, a first tension block 3a, a second base 2b, and a second tension block 3 b. The first base 2a and the first tensioning block 3a constitute a first set of fittings suitable for the transmitter coil 20. The suitable transmitting coils refer to: the arc degree of each of the first base 2a and the first tensioning block 3a is consistent with the arc degree of the inner wall 201 of the transmitting coil 20 (in the embodiment of the present application, consistency includes the same or other situations that can be positioned), and is used for measuring the situation of the magnetic field distribution with the transmitting coil 20 as a positioning reference. The second base 2b and the second tensioning block 3b form a second set of fittings for the gradient coil 30, where the fitting for the gradient coil 30 means: the respective arc degrees of the second base 3a and the second tension block 3b are consistent with the arc degree of the inner wall 301 of the gradient coil 30, and the method is suitable for measuring the magnetic field distribution by using the gradient coil 30 as a positioning reference.

With continued reference to fig. 1-3 and fig. 4-6, the bracket body 1a includes a top end 11 and a bottom end 12 opposite to each other. The first and second sets of fittings are alternatively mounted to the holder body 1a to form first shim holders 10a1 and 10a2, in which first shim holders 10a and 10a2 the tensioning block of each set of fittings is located at the top end 11 and the base is located at the bottom end 12. The selecting means that only one of the first group of accessories and the second group of accessories is mounted on the bracket body 1a under the condition that the positioning reference is selected, that is, under the condition that the transmitting coil 20 is selected as the positioning reference, the first base 2a is mounted at the bottom end 12 of the bracket body 1a, and the first tensioning block 3a is mounted at the top end 11 of the bracket body 1 a; under the condition that the gradient coil 30 is selected as the positioning reference, the second base 2b is installed at the bottom end 12 of the bracket body 1a, and the second tensioning block 3b is installed at the top end 11 of the bracket body 1 a.

Because the first group of fittings and the second group of fittings are selected to be installed on the bracket body 1a, the tension block in each group of fittings is positioned at the top end 11, and the base is positioned at the bottom end 12, in this way, the first group of fittings installed on the bracket body 1a are suitable for the condition that the positioning reference is the transmitting coil 20, and the second group of fittings installed on the bracket body 1a are suitable for the condition that the positioning reference is the gradient coil 30, therefore, the shimming bracket suitable for the positioning reference can be formed only by installing corresponding fittings on the bracket body 1a, and under the condition that the positioning reference needs to be changed, a shimming bracket is not required to be redesigned, so that the overall design and manufacturing cost is not increased. In addition, the first base, the first tensioning block, the second base and the second tensioning block are separated from the support body, can be packaged independently, and occupy small space.

With continuing reference to fig. 1 in conjunction with fig. 2 to 6, in one embodiment, the shimming bracket assembly includes a tension screw 4 connected to a top end 11 of the bracket body 1a, in which case, the first tension block 3a or the second tension block 3b is provided with a threaded hole, and the first set of fittings and the second set of fittings are alternatively mounted on the bracket body 1a, and include: the first tensioning block 3a or the second tensioning block 3b is in threaded connection with the tensioning screw 4, and more specifically, the tensioning screw 4 is in threaded connection with a threaded hole of the first tensioning block 3a or the second tensioning block 3 b.

Through with first tight piece 3a or the second tight piece 3b that rises with threaded rod 4 threaded connection, not only realize the connection in of the alternative of first tight piece 3a and the second tight piece 3b that rises in support body 1a, moreover, can also make the position of first tight piece 3a or the second tight piece 3b that rises adjustable, and then, the support body 1a, the first tight piece 3a that rises and first base 2a constitutes 10a1 more firm support of leaning on in the inner wall 201 of transmitting coil 20, perhaps, the support body 1a, the first shimming support 10a2 that the second tight piece 3b and the second base 2b constitute more firm support of leaning on in the inner wall 301 of gradient coil 30.

With continuing reference to fig. 1 in conjunction with fig. 2-6, in one embodiment, the shim bracket assembly includes a bolt 5, and the mounting of the shim bracket assembly to the bracket body 1a alternatively includes: the first base 2a or the second base 2b is connected to the bottom end 12 of the bracket body 1a by the bolt 5.

Because the first base 2a or the second base 2b is connected to the bottom end 12 of the bracket body 1a through the bolt 5, the assembly and disassembly are convenient, and the distance between the first base 2a or the second base 2b relative to the bracket body 1a can be adjusted, which is combined with the manner that the tension block is screwed to the threaded rod 4, so that the first shim bracket 10a1 formed by the bracket body 1a, the first tension block 3a and the first base 2a is more firmly abutted against the inner wall 201 of the transmitting coil 20, or the first shim bracket 10a1 formed by the bracket body 1a, the second tension block 3b and the second base 2b is more firmly abutted against the inner wall 301 of the gradient coil 30.

Referring to fig. 1 in combination with fig. 2 to 6, in one embodiment, the bracket body 1a is a polygonal frame, and includes a tensioning block mounting arm as the top end, a base mounting arm as the bottom end, and two connecting arms 13, and each connecting arm 13 is connected to the tensioning block mounting arm and the base mounting arm. In this embodiment, the tensioner mounting arm as the top end 11 is parallel to the base mounting arm as the bottom end 12.

Since the stent body 1a is a polygonal frame, so that other components can be placed inside the frame, the shim stent assembly 10a1 occupies little space within the transmit coil 20 or gradient coil 30.

With continued reference to fig. 1 in conjunction with fig. 2 to 6, each of the connecting arms 13 includes a first connecting arm 131 and a second connecting arm 132 connected at an obtuse angle. Every linking arm 13 with the tight piece installation arm that rises with base installation arm is connected and is included: the first connecting arm 131 is perpendicularly connected to the end of the base mounting arm, and the second connecting arm 132 is inclined toward the tensioning block mounting arm and connected to the end of the tensioning block mounting arm.

The bracket body 1a formed by the connecting arm 13, the base mounting arm and the tensioning block mounting arm has at least the following advantages: 1) the bracket body 1a not only occupies small space; 2) since the bracket body 1a is a frame, some other components of the shim bracket assembly (such as the later-described mounting seat 14 and the shaft seat 15) can be placed in the frame, and other components of the shim bracket assembly (such as the later-described pushing device 6) can be connected with the components in the frame, so that the space occupied by the whole shim bracket assembly in the transmitting coil 20 or the gradient coil 30 is small; 3) the positioning and the stress of the bracket body 1a are better.

With continued reference to fig. 1 and fig. 4-6, the bracket body 1a includes a mounting seat 14 extending from the base mounting arm (i.e., the bottom end 12) to the tensioning block mounting arm (i.e., the top end 11) and a shaft seat 15. The mount 14 is provided with a guide groove 141. The shaft seat 15 is provided with a guide rail 151 located in the guide groove 141 and a scale 153 is provided on a side surface 152 of the shaft seat 15. In one embodiment, the mounting seat 14 and the two first connecting arms 131 form a "mountain" shape. The shim bracket assembly 10a1 includes a pushing device 6 connected to the shaft seat 15, the pushing device 6 pushes the shaft seat 15 to make the guide rail 151 move linearly along the guide groove 141 to display the displacement of the shaft seat 15 through the scale of the scale. One of the main functions of the pushing device 6 is to enable the guide rail 151 to move linearly along the guide groove 141, as long as the structure for achieving the function is sufficient, and in one embodiment, the pushing device 6 includes a fixing frame 61 having a zigzag shape, a telescopic rod 62, a rocker 63 and a handle 64. The fixing frame 61 is mounted on the mounting seat 14. The telescopic rod 62 is screwed into the threaded hole of the shaft seat 15, and the other end of the telescopic rod is connected to a pivot structure mounted on the mounting seat 14 and connected to the rocker 63. The rocker 63 is connected to the handle 64. The handle 64 is shaken to drive the telescopic rod 62 to rotate, the telescopic rod 62 is in threaded fit with the shaft seat 15 to convert the rotating motion into linear motion, and therefore the guide rail 151 linearly moves in the guide groove 141 along the Z direction. In the process of linear motion, the displacement of the shaft seat 15 can be displayed through the scales of the graduated scale 153.

In practical use, after shimming for the first time, the theoretical field intensity center is found not to be completely overlapped with the position where the shimming bracket is placed, and a small amount of error exists in the Z direction, so that accurate adjustment of the Z-direction distance is realized through the cooperation of the pushing device 6, the guide groove 141, the guide rail 151 and the scale. The Z-direction may be considered to be the axial direction of the gradient coil 20 or the transmit coil 30.

In order to realize more accurate linear motion along the Z direction, the guide groove 141 is a dovetail groove, and the guide rail is in a dovetail shape.

With continued reference to fig. 1 in conjunction with fig. 4-6, in order to securely position the shaft seat 15 in the adjusted position, the shim bracket assembly includes a fastening screw 7. The shaft seat 15 is provided with a screw hole penetrating through the shaft seat 15. The mount 14 includes a connection portion 142 having a common sidewall with the guide groove 141. The fastening screw 7 passes through the threaded hole and abuts against the connecting portion 142 to lock the shaft seat 15 to the mounting seat 14.

Referring to fig. 4-6, a second shim bracket assembly (also referred to as a second shim bracket assembly, and for ease of description, the shim bracket assembly described previously herein is referred to as a first shim bracket assembly) is also disclosed. The first shimming bracket assembly and the second shimming bracket assembly are all components forming a shimming bracket assembly, and the second shimming bracket assembly comprises a first base 2a, a first tensioning block 3a, a second base 2b, a second tensioning block 3b and a bracket body 1 b. The frame structure of support body 1b and support body 1a is the same, for example, all include base installation arm, tight piece installation arm and linking arm that rises, because, support body 1b need not install realize the Z to the relevant part of adjusting as before to, so, support body 1b and support body 1 a's difference lies in: the bracket body 1b does not include the mounting seat 14, the shaft seat 15, the pushing device 6 and the fastening screw 7. In this bracket assembly, the first tensioning block 3a and the first base 2a constitute a first set of fittings for the transmitting coil 20, and the second tensioning block 3b and the second base 2b constitute a second set of fittings for the gradient coil 30. The first group of fittings and the second group of fittings are alternatively attached to the holder body 1b to form a second shim holder, and more specifically, the first group of fittings are attached to the holder body 1b to form a second shim holder 10b1, and the second group of fittings are attached to the holder body 1b to form a second shim holder 10b 2.

Typically, the shim holder assembly comprises a first shim holder, a second shim holder, an index plate 8 and a magnetic field measuring device 9. With continuing reference to fig. 4-6 in conjunction with fig. 1, the manner in which the shim holder assembly is constructed using the shim holder assemblies is as follows: the bracket body 1b comprises a supporting column 16 extending from the base mounting arm to the tension block mounting arm and used for being connected with the magnetic field measuring device, and the supporting column 16 is located inside the frame. The shaft seat 15 is provided with a positioning hole, and a positioning pin 17 is arranged in the positioning hole. The magnetic field measuring device 9 is mounted on the connecting beam 18. The two ends of the connecting beam 18 are respectively connected with a first rotating shaft 19a and a second rotating shaft 19b, the first rotating shaft 19a is connected with the dividing plate 8 and the shaft seat 15, and the second rotating shaft 19b is connected with the supporting column 16. The skilled person will appreciate that other structures than the support posts 16 may be provided on the holder body 1b to enable connection to the magnetic field measuring device 9. In addition, how to connect the bracket body 1a, the bracket body 1b, the dividing plate 8 and the magnetic field measuring device 9 to form the shimming bracket assembly can also adopt other modes, and the details are not repeated.

With continued reference to fig. 4 and 5, the first shim holder 10a1 is formed by connecting the holder body 1a to the first base 2a and the first tension block 3a, respectively, when the transmitter coil 20 is used as a positioning reference. The second shim holder 10b1 is formed by connecting the other first base 2a and the other first tension block 3a to the holder body 1 b. The first tensioning block 3a and the first base 2a of each of the first shim holder 10a1 and the second shim holder 10b1 rest against the inner wall 201 of the transmit coil 20. If the position needs to be adjusted, the tensioning screw can be loosened or tightened, or the position can be adjusted by the pushing device. The indexing disc 8 is shifted to rotate, the indexing disc 8 rotates to drive the connecting beam 18, the first rotating shaft 19a, the second rotating shaft 19b and the magnetic field measuring device 9 to synchronously rotate, when the connecting beam rotates to a required position, the positioning pin 17 is inserted into the positioning hole and the counting hole of the indexing disc to determine the current rotating angle position, and the magnetic field distribution at the moment is measured through the magnetic field measuring device.

Referring to fig. 6 in combination with fig. 4 and 5, in a case where the positioning reference needs to be changed from the transmitting coil 20 to the gradient coil 30, the first base 2a and the first tension block 3a mounted on the first shim holder 10a1 (i.e., the holder body 1a) are replaced with the second base 2b and the second tension block 3b to form another first shim holder 10a2, and the first base 2a and the first tension block 3a mounted on the second shim holder 10b1 (i.e., the holder body 1b) are replaced with the second base 2b and the second tension block 3b to form another second shim holder 10b 2. Then, the second bases 2b and the second tensioning blocks 3b of the first shim support 10a2 and the second shim support 10b2 are respectively abutted against the inner wall of the gradient coil, and the method for measuring the magnetic field distribution is the same as that described above, and is not described again.

In fig. 4 to 6, the mounting seat 14, the shaft seat 15 and the pushing device 6 are arranged on the bracket body 1a based on the consideration of the Z-direction adjustment position, so that the structures of the first shim brackets 10a1 and 10a2 and the second shim brackets 10b1 and 10b2 are different, and the skilled person can understand that, in the case that the Z-direction adjustment is not required, the structures of the bracket body 1a and the bracket body 1b can be the same, and further, the structures of the first shim brackets 10a1 and 10a2 and the second shim brackets 10b1 and 10b2 can be the same. In addition, in the above embodiment, the first bases 2a connected to the bracket body 1a and the bracket body 1b have the same structure, the first tensioning blocks 3a have the same structure, the second bases 2b have the same structure, and the second tensioning blocks 3b have the same structure, and the skilled person can understand that the first bases 2a connected to the bracket body 1a and the bracket body 1b may have different structures, the first tensioning blocks 3a may have different structures, the second bases 2b may have different structures, and the second tensioning blocks 3b may have different structures, as long as the arc portions are provided, and the arc degrees of the arc portions are consistent with the arc degrees of the inner walls of the positioning references.

In summary, the present application further discloses a shimming bracket assembly, which includes a first shimming bracket, a second shimming bracket, a dividing plate and a magnetic field measuring device. The dividing plate is connected to the magnetic field measuring device, and both are connected to the first shimming support and the second shimming support as a whole. The graduated disk drives the magnetic field measuring device to synchronously rotate. The first group of accessories and the second group of accessories of the shimming bracket assembly are alternatively arranged on the bracket body to form the first shimming bracket or the second shimming bracket.

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.

Claims

1. The utility model provides a shimming bracket component, its characterized in that, includes support body, first base, first tight piece that rises, second base and the second tight piece that rises, wherein, first base with first tight piece that rises constitutes the first group's accessory that is applicable to transmitting coil, second base and the second tight piece that rises constitute the second group's accessory that is applicable to gradient coil, the support body includes relative top and bottom, first group's accessory with the alternative install in of second group's accessory in support body and every group the tight piece that rises is located in the accessory the top, the base is located the bottom.

2. The shim bracket assembly of claim 1, comprising a tension screw connected to a top end of the bracket body, the first and second sets of fittings alternatively mounted to the bracket body comprising: the first tensioning block or the second tensioning block is in threaded connection with the tensioning screw.

3. The shim bracket assembly of claim 1 or 2, wherein the shim bracket assembly comprises bolts, and the mounting of the first and second sets of fittings to the bracket body alternatively comprises: the first base or the second base is connected to the bottom end of the bracket body through the bolt.

4. The shim bracket assembly of claim 1, wherein the bracket body is a polygonal frame including a tension block mounting arm as the top end and a base mounting arm as the bottom end and two connecting arms, each connecting arm connecting the tension block mounting arm and the base mounting arm.

5. The shim bracket assembly of claim 4, wherein each of the connecting arms includes a first connecting arm and a second connecting arm connected at an obtuse angle, each of the connecting arms connecting the tension block mounting arm and the base mounting arm includes: the first connecting arm is vertically connected to the end part of the base mounting arm, and the second connecting arm is inclined towards the tensioning block mounting arm and is connected to the end part of the tensioning block mounting arm.

6. The shim bracket assembly of claim 4 or claim 5, wherein the shim bracket assembly is configured to connect to a magnetic field measurement device, and the bracket body comprises a support post extending from the base mounting arm to the tension block mounting arm for connection to the magnetic field measurement device, the support post being located within the frame.

7. The shimming bracket assembly according to claim 4 or 5, wherein the bracket body comprises a mounting seat extending from the base mounting arm to the tension block mounting arm and an axle seat, the mounting seat is provided with a guide groove, the axle seat is provided with a guide rail positioned in the guide groove, and a scale is arranged on the side surface of the axle seat;

the shimming bracket assembly comprises a pushing device connected with the shaft seat, and the pushing device pushes the shaft seat to enable the guide rail to linearly move in the guide groove along the Z direction so as to display the displacement of the shaft seat through the scales of the graduated scale.

8. The shim bracket assembly of claim 7, wherein the guide slots are dovetail slots and the guide rails are dovetail shaped.

9. The shim bracket assembly of claim 7, comprising a fastening screw, wherein the shaft seat is provided with a threaded hole therethrough, and wherein the mounting seat comprises a connection portion having a common sidewall with the guide slot, and wherein the fastening screw passes through the threaded hole and abuts against the connection portion to lock the shaft seat to the mounting seat.

10. A shimming bracket assembly is characterized by comprising a first shimming bracket, a second shimming bracket, an index plate and a magnetic field measuring device, wherein,

the dividing disc is connected with the magnetic field measuring device and integrally connected with the first shimming bracket and the second shimming bracket, and the dividing disc drives the magnetic field measuring device to synchronously rotate;

the shim bracket assembly of any one of claims 1 to 5 and 7 to 9, having alternatively a first set of fittings and a second set of fittings mounted to the bracket body to form the first shim bracket;

the shim bracket assembly of any one of claims 1 to 6, having alternatively a first set of fittings and a second set of fittings mounted to the bracket body to form the second shim bracket; the fittings of the first shim bracket mount and the fittings of the second shim bracket mount are identical.