A precisely adjustable transmitting coil vibration reduction support device

Abstract

The present invention relates to the field of magnetic resonance imaging technology, and more particularly to a precisely adjustable transmitting coil vibration-damping support device, comprising a magnet, a housing fixedly connected to the interior of the magnet, a gradient coil fixedly connected to the inner wall of the housing, and a transmitting coil extending through the interior of the gradient coil. The present invention overcomes the shortcomings of the prior art by providing an X-axis adjustment hole, a Y-axis adjustment screw, and a first Z-axis adjustment hole. The X-axis adjustment screw can be moved left and right along the interior of a groove, the Y-axis adjustment screw can be turned to drive a lower damping pad and the transmitting coil to move up and down, and the Z-axis adjustment screw can be moved along the interior of the first Z-axis adjustment hole. This allows the transmitting coil to be adjusted in three directions: X, Y, and Z. This allows for precise positioning of the transmitting coil, improves the concentricity of the transmitting coil's radio frequency field, the magnet's B field, and the gradient field of the gradient coil, and thereby improves the image quality of the magnetic resonance imaging system.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic resonance imaging, in particular to a precisely adjustable transmitting coil vibration reduction support device. Background Art

[0002] Magnetic resonance imaging (MRI) is an imaging technique that reconstructs images from signals generated by the resonance of atomic nuclei within a strong magnetic field. It is a nuclear physics phenomenon. It uses radio frequency pulses to excite atomic nuclei with non-zero spin placed in the magnetic field. After the radio frequency pulses cease, the nuclei relax. During this relaxation process, signals are collected using induction coils and reconstructed into a mathematical image using specific mathematical methods. MRI imaging technology differs from other imaging techniques in that it provides far more information than many other imaging techniques in medical imaging. The transmitting coil is a key functional component of the MRI system. Its performance and ability to effectively function directly impact the performance and image quality of the MRI system. To fully utilize the transmitting coil's functions and performance, its accurate installation position within the magnet (gradient coil) is essential. Therefore, a device that can precisely adjust the transmitting coil's installation position is required to ensure its installation accuracy.

[0003] The existing transmitting coil is a short structure installed inside the magnet, and its support can only be supported on the gradient coil through several of its own supporting points, such as Figure 1-4 As shown, the transmitter coil is adjusted by Figure 1-4 This is achieved by adjusting the support structure in

[0004] Regarding the above-mentioned related technologies, the inventors believe that, on the one hand, the adjustment direction is single and the adjustment accuracy is not high; on the other hand, since it is installed in the middle position inside the gradient coil, it is necessary to insert the body into the gradient coil during adjustment, which makes the adjustment operation inconvenient; another aspect is that since the transmitting coil is directly supported on the gradient coil, the vibration generated by the gradient coil will be directly transmitted to the transmitting coil, which in turn causes the transmitting coil to be affected by the vibration of the gradient coil, resulting in low image quality of the magnetic resonance imaging system. Summary of the Invention

[0005] The purpose of the present invention is to solve or at least alleviate the problems of single adjustment direction and low adjustment accuracy in the prior art.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a precisely adjustable transmitting coil vibration reduction support device, comprising a magnet, wherein the interior of the magnet is fixedly connected to a shell, the inner wall of the shell is fixedly connected to a gradient coil, the interior of the gradient coil is penetrated by a transmitting coil, lower brackets are provided on both sides of the magnet, grooves are symmetrically provided on both sides of the lower bracket, the inner wall of each group of the grooves is provided with an X-direction adjustment hole, the interior of each group of the X-direction adjustment holes penetrates the X-direction adjustment screw, each group of the X-direction adjustment screws is threadedly connected to the shell, the two sides of the lower bracket are symmetrically threaded with Y-direction adjustment screws, the tops of the two groups of the Y-direction adjustment screws abut against the lower bracket. A shock-absorbing pad, a fixed block is provided above the lower shock-absorbing pad, and the interior of the fixed block is symmetrically threaded with a guide rod, and the guide rod is slidingly connected to the lower shock-absorbing pad, and the tops of the fixed blocks on both sides are symmetrically fixedly connected with middle brackets, and the tops of the two groups of middle brackets on the same side are fixedly connected with launch tube fixing frames, and the interior of the launch tube fixing frame is symmetrically provided with first Z-direction adjustment holes, and an arc-shaped connecting plate is provided above the launch tube fixing frame, and the opposite sides of the two groups of the arc-shaped connecting plates are symmetrically provided with movable concave holes corresponding to the first Z-direction adjustment holes, and the interior of each group of the first Z-direction adjustment holes is penetrated by a Z-direction adjustment screw, and each group of the Z-direction adjustment screws is threadedly connected to the transmitting coil.

[0007] Optionally, a second washer is sleeved on the outer side of each group of the X-direction adjusting screws, and each group of the second washers abuts against the inner wall of the groove.

[0008] Optionally, an adjustment pad is abutted between the fixing block and the lower shock-absorbing pad, and the guide rod passes through the adjustment pad.

[0009] Optionally, a guide hole adapted to the guide rod is symmetrically opened on the top of the lower bracket, and the guide rod is inserted into the guide hole.

[0010] Optionally, the top of each group of the fixing blocks is fixedly connected with a right-angle plate, and each group of the right-angle plates is respectively fixedly connected to each group of the middle brackets.

[0011] Optionally, an upper shock-absorbing pad is abutted between the arc-shaped connecting plate and the launch tube fixing frame, and a second Z-direction adjustment hole corresponding to the first Z-direction adjustment hole is symmetrically opened inside the upper shock-absorbing pad, and the Z-direction adjustment screw passes through the second Z-direction adjustment hole.

[0012] Optionally, a first washer is sleeved on the outer side of the Z-axis adjusting screw, and the first washer abuts against a side wall of the launch tube fixing bracket away from the upper shock-absorbing pad.

[0013] Optionally, the four corners of the bottom of the shell are fixedly connected with U-shaped supports, the bottom of each group of the U-shaped supports is fixedly connected with a rectangular support, and the bottom of each group of the rectangular supports is fixedly connected with a rubber pad.

[0014] Optionally, the four top corners of the shell are fixedly connected with connection blocks, and each group of the connection blocks is provided with a lifting hole inside.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) By setting the X-direction adjustment hole, the Y-direction adjustment screw and the first Z-direction adjustment hole, the X-direction adjustment screw can move left and right along the inside of the groove, the Y-direction adjustment screw can drive the lower shock-absorbing pad and the transmitting coil to move up and down when it is turned, and the Z-direction adjustment screw can move along the inside of the first Z-direction adjustment hole, so that the transmitting coil has X, Y, and Z three-direction adjustment functions, which can realize the precise positioning of the transmitting coil, which is beneficial to improving the concentricity of the radio frequency field of the transmitting coil, the B field of the magnet and the gradient field of the gradient coil, thereby improving the image quality of the magnetic resonance imaging system.

[0017] (2) By arranging the upper shock-absorbing pad and the adjustment pad, the vibration of the gradient coil is reduced in the first stage by the upper shock-absorbing pad, and then in the second stage by the adjustment pad, thereby further reducing the influence of the vibration of the gradient coil on the transmitting coil, thereby improving the image quality of the magnetic resonance imaging system;

[0018] (3) By arranging the Y-axis adjustment screw, the X-axis adjustment screw, and the Z-axis adjustment screw on the front and rear end surfaces fixed to the magnet, the convenience of adjusting and fixing the transmitting coil is effectively improved compared to the existing transmitting coil adjustment support structure being arranged inside the magnet. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a side view of the overall structure of the prior art;

[0020] Figure 2 In the existing technology Figure 1 Structural cross-section view of the middle AA part;

[0021] Figure 3 In the existing technology Figure 1 Cross-sectional view of the structure of the middle BB part;

[0022] Figure 4 In the existing technology Figure 2 A magnified view of the structure of the middle part A;

[0023] Figure 5 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 6It is a schematic diagram of the overall structure of the present invention from another perspective;

[0025] Figure 7 It is a side view of the overall structure of the present invention;

[0026] Figure 8 For the present invention Figure 7 Structural cross-sectional view of the middle AA part;

[0027] Figure 9 Schematic diagram of the lower bracket structure of the present invention;

[0028] Figure 10 This is a front view of the lower support structure of the present invention;

[0029] Figure 11 is a cross-sectional view of the lower shock-absorbing pad structure of the present invention;

[0030] Figure 12 This is a schematic diagram of the structure of the Z-direction adjusting screw of the present invention;

[0031] Figure 13 This is a top view of the arc-shaped connecting plate structure of the present invention.

[0032] In the figure: 1. Magnet; 2. U-shaped support; 3. Rectangular support; 4. Rubber pad; 5. Connecting block; 6. Lifting hole; 7. Lower bracket; 8. Transmitting coil; 9. Housing; 10. Gradient coil; 11. Lower shock-absorbing pad; 12. Adjustment pad; 13. Fixing block; 14. Guide rod; 15. Y-axis adjustment screw; 16. Groove; 17. X-axis adjustment screw; 18. Middle bracket; 19. Right-angle plate; 20. Transmitter tube fixing bracket; 21. Upper shock-absorbing pad; 22. First Z-axis adjustment hole; 23. Z-axis adjustment screw; 24. Arc-shaped connecting plate; 25. X-axis adjustment hole; 26. Movable concave hole; 27. Guide hole; 28. First washer; 29. Second washer; 30. Second Z-axis adjustment hole. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] See also Figure 5-13A precisely adjustable transmitting coil vibration damping support device includes a magnet 1, with a housing 9 fixedly connected to the interior of the magnet 1. The magnet 1 is provided to isolate and protect the magnet 1. U-shaped supports 2 are fixedly connected to the four corners of the bottom of the housing 9. Each set of U-shaped supports 2 is fixedly connected to the bottom of a rectangular support 3. Each set of rectangular supports 3 is fixedly connected to the bottom of a rubber pad 4. The U-shaped supports 2, rectangular supports 3, and rubber pads 4 are provided to support the entire device. Connecting blocks 5 are fixedly connected to the four corners of the top of the housing 9. Each set of connecting blocks 5 has a lifting hole 6 formed therein. The connection blocks 5 and lifting holes 6 facilitate lifting and moving the entire device.

[0035] See also Figure 9-13 The inner wall of the housing 9 is fixedly connected to a gradient coil 10, with the transmitting coil 8 extending through the interior of the gradient coil 10. Lower brackets 7 are provided on both sides of the magnet 1. Grooves 16 are symmetrically defined on both sides of the lower brackets 7. Each set of grooves 16 defines an X-axis adjustment hole 25 within the inner wall. Each set of X-axis adjustment holes 25 extends through an X-axis adjustment screw 17. The grooves 16 are configured to receive the X-axis adjustment screws 17. Each set of X-axis adjustment screws 17 is threadedly connected to the housing 9 and securely connects the lower bracket 7 to the housing 9. When the X-axis adjustment screws 17 are loosened, the lower bracket 7 can move left and right along the X-axis adjustment screws 17.

[0036] See also Figure 8-12 Each set of X-axis adjustment screws 17 is fitted with a second washer 29, which abuts the inner wall of the groove 16. The second washers 29 serve to position the nuts of the X-axis adjustment screws 17, reducing the chance of the nuts penetrating the X-axis adjustment screws 17. Y-axis adjustment screws 15 are symmetrically threaded onto the sides of the lower bracket 7. The tops of the two sets of Y-axis adjustment screws 15 abut against lower shock-absorbing pads 11, which are designed to drive the lower shock-absorbing pads 11 up and down when rotated. A fixing block 13 is positioned above the lower shock-absorbing pad 11. A guide rod 14 is symmetrically threaded onto the inside of the fixing block 13, which is slidably connected to the lower shock-absorbing pad 11. An adjustment pad 12 abuts between the fixing block 13 and the lower shock-absorbing pad 11, and the guide rod 14 extends through the adjustment pad 12. The adjustment pad 12 acts as a shock absorber for the fixing block 13.

[0037] See also Figure 9-12The top of the lower bracket 7 is symmetrically provided with guide holes 27 that match the guide rods 14. The guide rods 14 are inserted into the guide holes 27. The guide holes 27 and the guide rods 14 are configured to guide the up and down movement of the lower shock-absorbing pad 11. The tops of the fixing blocks 13 on both sides are symmetrically fixedly connected to the middle brackets 18. The tops of each group of fixing blocks 13 are fixedly connected to right-angle plates 19. Each group of right-angle plates 19 is fixedly connected to each group of middle brackets 18. The right-angle plates 19 are configured to further connect and secure the middle brackets 18 to the fixing blocks 13, thereby improving the stability of the connection between the fixing blocks 13 and the middle brackets 18. The tops of the two groups of middle brackets 18 on the same side are fixedly connected to the launch tube fixing brackets 20. The middle brackets 18 are configured to support the launch tube fixing brackets 20.

[0038] See also Figure 9-13 The launch tube mounting bracket 20 has symmetrically defined first Z-axis adjustment holes 22. A curved connecting plate 24 is positioned above the mounting bracket 20. An upper shock-absorbing pad 21 abuts the curved connecting plate 24 against the mounting bracket 20, providing a cushioning effect for the curved connecting plate 24. Two sets of curved connecting plates 24 have symmetrically defined movable recesses 26 on opposite sides, corresponding to the first Z-axis adjustment holes 22. Each set of first Z-axis adjustment holes 22 has a Z-axis adjustment screw 23 extending through it. The upper shock-absorbing pad 21 has symmetrically defined second Z-axis adjustment holes 30, corresponding to the first Z-axis adjustment holes 22. The Z-axis adjustment screws 23 extend through the second Z-axis adjustment holes 30. The first and second Z-axis adjustment holes 22 and 30 are designed to accommodate the Z-axis adjustment screws 23. Each set of Z-axis adjustment screws 23 is threadedly connected to the transmitting coil 8, securing the launch tube mounting bracket 20 to the transmitting coil 8. A first washer 28 is sleeved on the outer side of the Z-direction adjusting screw 23, and the first washer 28 abuts against a side wall of the launch tube fixing frame 20 away from the upper shock-absorbing pad 21. The first washer 28 is set to limit the nut of the Z-direction adjusting screw 23 to reduce the probability of the nut of the Z-direction adjusting screw 23 passing through the first Z-direction adjusting hole 22.

[0039] Working principle: When it is necessary to adjust the left and right position of the transmitting coil 8, each set of X-direction adjusting screws 17 can be loosened to release the limit of the lower bracket 7, and then the lower brackets 7 on both sides can be moved left and right, thereby driving the transmitting coil 8 to move left and right, so as to adjust the left and right position of the transmitting coil 8. After adjustment, it is only necessary to tighten each set of X-direction adjusting screws 17 again. When it is necessary to adjust the height of the transmitting coil 8, it is only necessary to screw each set of Y-direction adjusting screws 15 so that the Y-direction adjusting screws 15 can push the lower shock-absorbing pad 11 and the middle bracket 11 when screwing. The frame 18 and the transmitting coil 8 move up and down, thereby adjusting the height of the transmitting coil 8. After the adjustment is completed, it is sufficient to stop turning the Y-direction adjustment screw 15. When it is necessary to adjust the front and rear position of the transmitting coil 8, each group of Z-direction adjustment screws 23 is loosened, and then the transmitting coil 8 can be moved forward and backward, so that each group of Z-direction adjustment screws 23 moves inside each group of first Z-direction adjustment holes 22, thereby adjusting the front and rear position of the transmitting coil 8. After the adjustment is completed, it is sufficient to tighten each group of Z-direction adjustment screws 23 to fix the position of the transmitting coil 8.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. 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 precisely adjustable transmitting coil vibration reduction support device, comprising a magnet (1), a housing (9) fixedly connected to the interior of the magnet (1), a gradient coil (10) fixedly connected to the inner wall of the housing (9), and a transmitting coil (8) passing through the interior of the gradient coil (10), characterized in that: The magnet (1) is provided with a lower bracket (7) on both sides, and grooves (16) are symmetrically opened on both sides of the lower bracket (7). The inner wall of each group of the grooves (16) is provided with an X-direction adjustment hole (25). The interior of each group of the X-direction adjustment holes (25) passes through the X-direction adjustment screw (17). Each group of the X-direction adjustment screw (17) is threadedly connected to the housing (9). The two sides of the lower bracket (7) are symmetrically threaded with Y-direction adjustment screws (15). The tops of the two groups of the Y-direction adjustment screws (15) are in contact with a lower shock-absorbing pad (11). A fixing block (13) is provided above the lower shock-absorbing pad (11). The interior of the fixing block (13) is symmetrically threaded with a guide rod (14). The guide rod (14) The fixing blocks (13) are symmetrically connected to the top of the fixing blocks (13) on both sides with a middle bracket (18), and the tops of the two groups of the middle brackets (18) on the same side are fixedly connected with a launch tube fixing frame (20), and the inside of the launch tube fixing frame (20) is symmetrically provided with a first Z-direction adjustment hole (22), and an arc-shaped connecting plate (24) is provided above the launch tube fixing frame (20), and the opposite sides of the two groups of the arc-shaped connecting plates (24) are symmetrically provided with movable concave holes (26) corresponding to the first Z-direction adjustment hole (22), and the inside of each group of the first Z-direction adjustment hole (22) is penetrated by a Z-direction adjustment screw (23), and each group of the Z-direction adjustment screw (23) is threadedly connected to the launch coil (8).

2. The precisely adjustable transmitting coil vibration reduction support device according to claim 1, characterized in that: The outer side of each group of X-direction adjusting screws (17) is sleeved with a second washer (29), and each group of the second washer (29) abuts against the inner wall of the groove (16).

3. The precisely adjustable transmitting coil vibration reduction support device according to claim 1, characterized in that: An adjustment pad (12) is in contact between the fixed block (13) and the lower shock-absorbing pad (11), and the guide rod (14) passes through the adjustment pad (12).

4. The precisely adjustable transmitting coil vibration reduction support device according to claim 3, characterized in that: A guide hole (27) adapted to the guide rod (14) is symmetrically provided on the top of the lower bracket (7), and the guide rod (14) is inserted into the inside of the guide hole (27).

5. The precisely adjustable transmitting coil vibration reduction support device according to claim 4, characterized in that: The top of each group of the fixed blocks (13) is fixedly connected with a right-angle plate (19), and each group of the right-angle plate (19) is fixedly connected to each group of the middle brackets (18).

6. The precisely adjustable transmitting coil vibration reduction support device according to claim 1, characterized in that: An upper shock-absorbing pad (21) is in contact between the arc-shaped connecting plate (24) and the launch tube fixing frame (20), and a second Z-direction adjustment hole (30) corresponding to the first Z-direction adjustment hole (22) is symmetrically opened inside the upper shock-absorbing pad (21), and the Z-direction adjustment screw (23) passes through the second Z-direction adjustment hole (30).

7. The precisely adjustable transmitting coil vibration reduction support device according to claim 6, characterized in that: A first washer (28) is sleeved on the outer side of the Z-direction adjusting screw (23), and the first washer (28) abuts against a side wall of the launch tube fixing frame (20) away from the upper shock-absorbing pad (21).

8. The precisely adjustable transmitting coil vibration reduction support device according to claim 1, characterized in that: The four corners of the bottom of the shell (9) are fixedly connected to U-shaped supports (2), the bottom of each group of the U-shaped supports (2) is fixedly connected to a rectangular support (3), and the bottom of each group of the rectangular supports (3) is fixedly connected to a rubber pad (4).

9. The precisely adjustable transmitting coil vibration reduction support device according to claim 8, characterized in that: The four corners of the top of the housing (9) are fixedly connected with connection blocks (5), and each group of the connection blocks (5) is provided with a lifting hole (6) inside.

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