Conveying box for placing magnetic resonance shimming strips

Abstract

The utility model discloses a transmission box for placing a magnetic resonance shimming strip, which belongs to the technical field of magnetic resonance imaging installation equipment and comprises a transmission shell, a transmission cavity is formed in the transmission shell, and an inlet and an outlet which are communicated with the transmission cavity are arranged at two ends of the transmission shell; the four conveying belts are all arranged in the conveying cavity and extend in the length direction of the conveying shell. A clamping cavity is defined by the four conveying belts, and a plurality of protrusions are arranged on the surfaces of the conveying belts. The lifting assembly can drive the conveying shell to move in the vertical direction. The moving assembly can drive the conveying shell to move in the horizontal direction. The height and the position of the conveying shell can be conveniently adjusted, the outlet is aligned with the placing position of the shimming strip, the clamping cavity matched with the shimming strip in shape can be formed through the four conveying belts, and the shimming strip is placed at the inlet and then synchronously moves to the outlet along with the four conveying belts to reach the placing position. And the shimming strips are accurately placed, so that the passive shimming accuracy is ensured, and the shimming strips do not need to be directly placed manually.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic resonance imaging installation equipment, in particular to a transfer box for placing magnetic resonance shim strips. Background Art

[0002] Under the premise that the direction of the main magnetic field is stable, applying a radio frequency field perpendicular to the direction of the main magnetic field will deflect the hydrogen protons. The recovery process after the deflection of the hydrogen protons will produce useful MR signals. In order to eliminate interference as much as possible, the movement of all hydrogen protons within the required range must be kept as similar as possible, which requires that the magnetic field in the area where the scanned object is located must be uniform. In the central circular hole of the superconducting magnet, if no constraints are imposed, the magnetic lines of force cannot always remain parallel, but instead form a magnetic field that diverges at both ends and is approximately parallel in the middle. The so-called magnetic resonance shimming is to ensure that the magnetic field in the scanning area at the center of the magnet is uniform.

[0003] Magnetic resonance shimming is divided into active shimming and passive shimming. Active shimming uses the magnetic field generated by electromagnetic coils to compensate for the main magnetic field. Passive shimming uses diamagnetic silicon steel sheets placed at specific positions in the central circular hole of the superconducting magnet to attract the magnetic flux lines to move in the required direction, thereby maintaining the horizontal distribution of the magnetic flux lines.

[0004] Passive shimming requires the operator to insert a shim bar containing a certain number of iron sheets into the corresponding position of the superconducting magnet. Due to the number of iron sheets placed in the shim bar, a suction force or resistance of varying degrees will be generated during the insertion process. The operator must hold the shim bar firmly and place it slowly to counter the strong magnetic force of the superconducting magnet. Even if the operation is correct, the operator may easily be squeezed by the shim bar or the gap between the magnets, or the shim bar may be sucked in and fly out of the other end, posing a certain safety hazard to the technician. In addition, the shim bar has poor hardness and will break and deform when exposed to strong magnetic forces, which can easily cause damage to the shim bar. Its integrity can only be ensured by subsequent bonding, which increases manpower and material costs, reduces the expected shimming effect, and affects the subsequent debugging of the entire machine. In addition, the magnetic force can be reduced by de-energizing, but this requires repeated infusion of liquid helium, a complex process and expensive liquid helium, which will greatly increase costs.

[0005] Therefore, developing and designing a transfer box that can safely, efficiently and accurately place shim strips, reduce manpower and material costs, improve safety, and ensure the accuracy of passive shim is an urgent problem to be solved at this stage. Utility Model Content

[0006] In order to solve the problems existing in the prior art, the utility model provides a conveying box for placing magnetic resonance shim strips. The conveying shell can be conveniently adjusted in height and position so that the outlet can be aligned with the placement position of the shim strips. Four conveyor belts in the conveying shell can form a clamping cavity that matches the shape of the shim strips. After the shim strips are placed at the inlet, they move synchronously with the four conveyor belts. The shim strips move to the outlet to reach the preset placement position. The shim strips are accurately placed, ensuring the accuracy of passive shimming. Manual placement of the shim strips is no longer required, reducing manpower and material costs and improving safety.

[0007] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0008] The utility model provides a transport box for placing magnetic resonance shim strips, comprising:

[0009] A transmission housing, wherein a transmission cavity extending along its length is formed in the transmission housing, and an inlet and an outlet communicating with the transmission cavity are respectively provided at both ends of the transmission housing;

[0010] Four conveyor belts, each of which is arranged in the conveying cavity and extends along the length direction of the conveying housing; the four conveyor belts enclose a clamping cavity, and a plurality of protrusions are provided on the surface of the conveyor belts distributed along the moving direction thereof;

[0011] A lifting assembly, wherein the lifting assembly is capable of driving the conveying shell to move in a vertical direction;

[0012] A moving assembly is provided, wherein the moving assembly can drive the conveying shell to move in a horizontal direction.

[0013] As a preferred technical solution, the conveying shell is provided with a conveying roller corresponding to each of the conveying belts near the inlet and the outlet, and the conveying belt is wound around the conveying roller.

[0014] As a preferred technical solution, at least two of the conveying rollers located at the inlet are configured as driving rollers, and the driving rollers are connected to a driving assembly that drives the driving rollers to rotate.

[0015] As a preferred technical solution, the driving assembly is configured as a first motor, and the first motor is fixed to the outer wall of the transmission housing;

[0016] And / or, the conveying rollers are all arranged to pass through the conveying shell, and the conveying rollers are rotatably connected to the conveying shell via bearings.

[0017] As a preferred technical solution, the cross sections of the four conveyor belts are located on the four sides of a rectangle.

[0018] As a preferred technical solution, the protrusion is in the shape of an elongated strip, and the extending direction of the protrusion is perpendicular to the moving direction of the conveyor belt.

[0019] As a preferred technical solution, the mobile assembly includes a base, and a plurality of casters are provided at the bottom of the base.

[0020] As a preferred technical solution, the lifting assembly is arranged between the base and the conveying shell, and the lifting assembly is configured as a scissors-type structure, the scissors-type structure is connected to a second motor that drives its deformation, and the second motor is fixed on the base.

[0021] As a preferred technical solution, the transmission cavity extends in a horizontal direction.

[0022] As a preferred technical solution, the two ends of the conveyor belt are respectively located at the inlet and the outlet.

[0023] The beneficial effects of the present invention are as follows:

[0024] The conveying shell of the utility model can be conveniently adjusted in height and position and the outlet can be aligned with the placement position of the shim strip. The four conveyor belts in the conveying shell can form a clamping cavity that matches the shape of the shim strip. After the shim strip is placed at the inlet, it can move synchronously with the four conveyor belts, which can effectively resist strong magnetic forces and ensure that the shim strip moves stably to the outlet. When the shim strip is discharged from the outlet, it reaches the preset placement position. The position of the shim strip is accurately placed, which ensures the accuracy of passive shimming, and no longer requires manual direct placement of the shim strip, which reduces manpower and material costs while effectively avoiding safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a transfer box for placing magnetic resonance shim strips according to the present invention;

[0026] Figure 2 for Figure 1 Front view of

[0027] Figure 3 for Figure 1 Side view of;

[0028] Figure 4 for Figure 1 Schematic diagram of the conveyor belt structure.

[0029] In the figure: 1-transmission shell, 11-inlet, 12-outlet, 2-conveyor belt, 21-protrusion, 22-transmission roller, 23-first motor, 3-clamping cavity, 4-scissor structure, 41-second motor, 51-bottom support, 52-castor. DETAILED DESCRIPTION

[0030] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0031] Please refer to Figures 1-4 , is an embodiment of a conveyor box for placing magnetic resonance shim strips provided by the present invention, comprising a conveyor shell 1, a conveyor cavity extending along its length direction is formed in the conveyor shell 1, the conveyor cavity extends in the horizontal direction, and an inlet 11 and an outlet 12 connected to the conveyor cavity are respectively provided at both ends of the conveyor shell 1; four conveyor belts 2 are all arranged in the conveyor cavity and extend along the length direction of the conveyor shell 1, and the conveyor shell 1 can protect and position the conveyor belts 2; the four conveyor belts 2 surround a clamping cavity 3 that matches the shape of the shim strip, and the two ends of the conveyor belt 2 are respectively located at the inlet 11 and the outlet 12. After the shim strip is placed at the inlet 11, it can be transported to the outlet 12 by the synchronous movement of the four conveyor belts 2; a plurality of protrusions 21 distributed along its moving direction are provided on the surface of the conveyor belt 2, and the edges of the shim strip are in close contact with the protrusions 21 on the four conveyor belts 2, so that the four conveyor belts 2 can stably fix the shim strip to resist the magnetic force during the placement process;

[0032] The lifting assembly can drive the conveying shell 1 to move in the vertical direction, and the moving assembly can drive the conveying shell 1 to move in the horizontal direction. The position of the conveying shell 1 can be easily adjusted so that the outlet 12 of the conveying shell 1 is aligned with the placement position of the shim strip, ensuring that the shim strip is accurately placed in the preset position.

[0033] For clarification, please refer to Figure 2 The cross-sections of the surfaces of the four conveyor belts 2 used to clamp the shim strips should be located on the four sides of a rectangle that matches the shape of the shim strips, ensuring that the four conveyor belts 2 can stably clamp and fix the shim strips.

[0034] For details, please refer to Figure 4 The protrusion 21 should be in the shape of a long strip, and the extension direction of the protrusion 21 is perpendicular to the moving direction of the conveyor belt 2, which can effectively increase the friction between the conveyor belt 2 and the shim strip. When the shim strip extends into the clamping cavity 3, the four conveyor belts 2 can firmly fix the shim strip. In other embodiments, the protrusion 21 can also extend in other directions or have other shapes, such as dot-shaped, corrugated, etc., so as to effectively clamp and fix the shim strip.

[0035] Furthermore, in order to avoid affecting the magnetic field generated by the superconducting magnet, the materials of all components of the present invention should be set to non-magnetic materials that are compatible with magnetic resonance.

[0036] In this embodiment, please refer to Figure 1-Figure 3A conveying roller 22 is provided at the conveying shell 1 near the inlet 11 and the outlet 12 corresponding to each conveyor belt 2. The conveyor belt 2 is wound around the conveyor roller 22. The conveyor roller 22 can support the conveyor belt 2. When one of the conveyor rollers 22 rotates, the conveyor belt 2 can be driven to move.

[0037] Based on the above examples, please refer to Figure 1-Figure 3 The two conveyor rollers 22 located at the entrance 11 are set as driving rollers, and the driving rollers are connected to a driving assembly that drives them to rotate. When the shim strips are placed in the clamping cavity 3, the movement of the two conveyor belts 2 can drive the other two conveyor belts 2 to move synchronously through the shim strips, while stably transporting the shim strips and ensuring that the driving assembly is away from the magnetic field; in other embodiments, the four conveyor rollers 22 located at the entrance 11 can also be set as driving rollers and connected to the driving assembly. The four conveyor belts 2 move synchronously, which can also stably drive the shim strips to move.

[0038] For details, please refer to Figure 1-Figure 3 The driving component is preferably set as a first motor 23, and the first motor 23 is fixed on the outer wall of the conveying shell 1; at the same time, the conveying rollers 22 should be set through the conveying shell 1, and the conveying rollers 22 are rotatably connected to the conveying shell 1 through bearings.

[0039] In this embodiment, please refer to Figure 1-Figure 3 The moving component includes a base 51, and the transmission shell 1 is located on the base 51. A plurality of casters 52 are provided at the bottom of the base 51, which can drive the transmission shell 1 to move in any horizontal direction.

[0040] Based on the above examples, please refer to Figure 1-Figure 3 The lifting component is arranged between the base 51 and the conveying shell 1. The lifting component is set as a scissor-type structure 4. The scissor-type structure 4 is connected to a second motor 41 that drives its deformation. The second motor 41 is fixed on the base 51. The second motor 41 drives the scissor-type structure 4 to deform and drive the conveying shell 1 to rise and fall; in other embodiments, the lifting component can also be set as a vertically arranged cylinder, hydraulic cylinder or electric push rod, so that the height of the conveying shell 1 can be easily adjusted.

[0041] Please refer to Figures 1-4 , the specific usage of this utility model is as follows:

[0042] The utility model is placed outside the controllable range of the magnetic force generated by the superconducting magnet;

[0043] Place the shimming bar with the iron sheet at the entrance 11 of the conveyor housing 1, start the first motor 23 to move the conveyor belt 2 a certain distance, bring the shimming bar into the clamping cavity 3 and fix it, and then turn off the first motor 23;

[0044] Move the conveying housing 1 and adjust its height so that its outlet 12 is aligned with the placement position of the shim strips. Start the first motor 23 to move the conveyor belt 2, and steadily push the shim strips out of the outlet 12 and install them to the preset position.

[0045] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A transport box for placing magnetic resonance shim strips, characterized in that: include: A transmission housing (1), wherein a transmission cavity extending along its length is formed in the transmission housing (1), and an inlet (11) and an outlet (12) communicating with the transmission cavity are respectively provided at both ends of the transmission housing (1); Four conveyor belts (2), each of the four conveyor belts (2) being arranged in the conveying cavity and extending along the length direction of the conveying housing (1); the four conveyor belts (2) enclose a clamping cavity (3), and a plurality of protrusions (21) distributed along the moving direction of the conveyor belt (2) are provided on the surface of the conveyor belt (2); A lifting assembly, wherein the lifting assembly is capable of driving the conveying housing (1) to move in a vertical direction; A moving assembly is provided, wherein the moving assembly can drive the conveying shell (1) to move in a horizontal direction.

2. A transport box for placing magnetic resonance shim strips according to claim 1, characterized in that: The conveying shell (1) is provided with a conveying roller (22) corresponding to each conveying belt (2) near the inlet (11) and the outlet (12), and the conveying belt (2) is wound around the conveying roller (22).

3. A transport box for placing magnetic resonance shim strips according to claim 2, characterized in that: At least two of the conveying rollers (22) located at the inlet (11) are configured as driving rollers, and the driving rollers are connected to a driving assembly that drives the driving rollers to rotate.

4. A transport box for placing magnetic resonance shim strips according to claim 3, characterized in that: The driving component is configured as a first motor (23), and the first motor (23) is fixed on the outer wall of the transmission housing (1); And / or, the conveying rollers (22) are all arranged through the conveying shell (1), and the conveying rollers (22) are rotatably connected to the conveying shell (1) via bearings.

5. The transport box for placing magnetic resonance shim strips according to claim 1, characterized in that: The cross sections of the four conveyor belts (2) are located on the four sides of a rectangle.

6. A transport box for placing magnetic resonance shim strips according to claim 1 or 5, characterized in that: The protrusion (21) is in the shape of an elongated strip, and the extending direction of the protrusion (21) is perpendicular to the moving direction of the conveyor belt (2).

7. The transport box for placing magnetic resonance shim strips according to claim 1, characterized in that: The mobile assembly comprises a base (51), and a plurality of casters (52) are provided at the bottom of the base (51).

8. The transport box for placing magnetic resonance shim strips according to claim 7, characterized in that: The lifting assembly is arranged between the base (51) and the conveying shell (1), and the lifting assembly is configured as a scissor-type structure (4). The scissor-type structure (4) is connected to a second motor (41) for driving its deformation, and the second motor (41) is fixed on the base (51).

9. The transport box for placing magnetic resonance shim strips according to claim 1, characterized in that: The transmission cavity extends in a horizontal direction.

10. The transport box for placing magnetic resonance shim strips according to claim 1, characterized in that: The two ends of the conveyor belt (2) are respectively located at the inlet (11) and the outlet (12).

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