Device for measuring imaging resolution of magnetic resonance radio frequency coil

Abstract

The utility model discloses a device for measuring the imaging resolution of a magnetic resonance radio frequency coil, and relates to a coil imaging resolution measurement technology. Comprising a shell, a fixed clamping plate and a movable clamping plate are arranged on the opposite inner side walls of the shell, a plurality of comb teeth distributed in a staggered mode are arranged on the opposite sides of the two clamping plates, and gaps between the adjacent comb teeth are adjusted through a coarse adjustment assembly and a fine adjustment assembly; the coarse adjustment assembly comprises a moving rail slidably arranged on the side wall of the shell, the moving clamping plate is adjustably slidably arranged in the moving rail, and when the coarse adjustment assembly adjusts the moving rail, the moving clamping plate and the moving rail move synchronously; the fine adjustment assembly is used for adjusting the relative position between the movable track and the movable clamping plate. According to the utility model, through the arrangement of the coarse adjustment assembly and the fine adjustment assembly, one of the clamping plates is adjusted twice, so that the size of the comb tooth gap is adjusted, the adjustment efficiency is accelerated through the coordinated adjustment, the adjustment precision is also ensured, and the limitation of a traditional fixed test die body is broken through.

Description

Technical Field

[0001] This utility model relates to coil imaging resolution measurement technology, specifically a device for measuring the imaging resolution of magnetic resonance radio frequency coils. Background Technology

[0002] Magnetic resonance imaging (MRI), as a non-invasive, radiation-free medical imaging technique, has been widely used in clinical diagnosis and scientific research. The radio frequency coil, as a crucial component of the MRI system, directly affects image quality and imaging resolution.

[0003] To evaluate and optimize the performance of RF coils, fixed-size resolution testing phantoms are commonly used in clinical settings for imaging. Through specific structures built into the phantom, line pairs can be formed in MRI images, allowing observation of the system's imaging performance regarding the spacing between these line pairs and thus evaluating the system's imaging resolution. In routine quality control and research experiments, multiple sets of tests with different resolution parameters are often required. Traditional fixed phantoms necessitate frequent replacements, which is not only cumbersome but also results in a lack of comparability. Existing technologies struggle to meet the evolving demands for resolution testing arising from the rapid development of MRI RF coil technology. Therefore, we provide a device for measuring the imaging resolution of MRI RF coils. Utility Model Content

[0004] The purpose of this invention is to provide a device for measuring the resolution of magnetic resonance radio frequency coil imaging to solve the problems mentioned in the background art.

[0005] This utility model can be achieved through the following technical solution: a device for measuring the imaging resolution of magnetic resonance radio frequency coils, including a hollow container structure shell, a fixed clamp and a movable clamp provided on the opposite inner sidewalls of the shell, and a number of staggered comb teeth provided on the opposite sides of the two clamps, the gap between adjacent comb teeth being adjusted by a coarse adjustment component and a fine adjustment component.

[0006] The coarse adjustment component includes a movable track slidably disposed on the side wall of the housing, and a movable clamping plate is adjustablely slidably disposed within the movable track. When the coarse adjustment component adjusts the movable track, the movable clamping plate moves synchronously with the movable track. The fine adjustment component is used to adjust the relative position between the movable track and the movable clamping plate.

[0007] A further technical improvement of this utility model is that: the coarse adjustment component includes a rotating disk rotatably disposed above the moving track, a coarse adjustment groove is provided on the moving track, a pin is eccentrically installed at the bottom of the rotating disk, the pin cooperates with the coarse adjustment groove, and the rotating disk is driven by a connecting shaft rotatably connected to the outer casing.

[0008] A further technical improvement of this utility model is that a locking bolt is provided on one side of the connecting shaft to restrict its rotational degree of freedom.

[0009] A further technical improvement of this utility model is that: the fine adjustment component includes a fixing block fixed to one end of the moving track slide, and a screw-in component is installed through the fixing block. The telescopic end of the screw-in component is fixedly connected to the moving clamp. The rotation adjustment end of the screw-in component is coaxially fixed with a guide shaft. A drive sleeve is slidably sleeved on the outside of the guide shaft through a spline. The drive sleeve passes through the outer shell and is connected to the adjustment knob.

[0010] A further technical improvement of this utility model is that a rotating sealing ring is provided at the penetration point between the drive sleeve and the outer shell, and a rotating damping is provided.

[0011] A further technical improvement of this utility model is that the surface of the adjustment knob is provided with anti-slip texture, and the outer periphery is marked with angle scale markings.

[0012] A further technical improvement of this utility model is that the components of the screw-in assembly are made of non-magnetic materials, and the structure and implementation principle of the screw-in assembly are the same as those of the micrometer.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This invention adjusts the gap between the comb teeth by setting up a coarse adjustment component and a fine adjustment component, which adjust one of the clamps twice. The coordinated adjustment of the coarse adjustment component and the fine adjustment component accelerates the adjustment efficiency while ensuring the adjustment accuracy. This breaks through the limitations of the traditional fixed test model and realizes the function of one test device to complete multiple resolution tests. The device has a simple and compact structure, low cost and flexible application scenarios. Attached Figure Description

[0015] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the overall external structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the connection of the main adjustment mechanism of this utility model;

[0018] Figure 3 This utility model Figure 2 A magnified view of a portion of point A in the middle.

[0019] In the diagram: 1. Outer shell; 2. Moving track; 3. Fixed clamping plate; 4. Moving clamping plate; 5. Fixed block; 6. Screw-in assembly; 7. Guide shaft; 8. Drive sleeve; 9. Adjustment knob; 10. Rotary disk; 11. Connecting shaft; 12. Pulley; 13. Rotary wheel; 14. Locking bolt; 201. Coarse adjustment groove. Detailed Implementation

[0020] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0021] Please see Figure 1-3 As shown, a device for measuring the imaging resolution of a magnetic resonance radio frequency coil includes a housing 1, which is a hollow container structure. A fixed clamping plate 3 and a movable clamping plate 4 are respectively provided on the opposite inner side walls of the housing 1. A number of comb teeth are provided on the opposite side of the two clamping plates, and the comb teeth on the two clamping plates are staggered.

[0022] Among them, the fixed clamping plate 3 is fixedly installed on the inner side wall of the outer shell 1, the moving track 2 is horizontally slidably set on the inner side wall of the outer shell 1, and the moving clamping plate 4 is slidably set on one side of the moving track 2.

[0023] A fixing block 5 is fixedly installed at one end of the slide of the moving track 2. A screw-in component 6 is fixedly installed through the fixing block 5. The telescopic end of the screw-in component 6 is fixedly connected to one end of the moving clamp 4 in the slide. A guide shaft 7 is coaxially fixed at the rotating end of the screw-in component 6. A drive sleeve 8 is sleeved on the outer periphery of the guide shaft 7. The drive sleeve 8 and the guide shaft 7 are in a spline sliding fit. The end of the drive sleeve 8 away from the guide shaft 7 passes through the outer shell 1 and an adjustment knob 9 is fixed at the end. The surface of the adjustment knob 9 is provided with anti-slip texture and the outer periphery is marked with angle scale markings. It should be noted that the drive sleeve 8 is sealed to the outer shell 1, and a certain damping is set during rotation to improve the rotation feel and accuracy. It will not rotate when no external force is applied.

[0024] It should be noted that all structural components of the screw-in assembly 6 are made of non-magnetic materials, and the structural composition and screw-in principle of the screw-in assembly 6 are the same as those of a micrometer with the frame removed. That is, the screw-in assembly 6 is a micrometer structure made of non-magnetic materials with the frame removed.

[0025] The top of the moving track 2 is provided with a coarse adjustment groove 201. A rotating disk 10 is provided above the coarse adjustment groove 201. A connecting shaft 11 is coaxially fixed on the rotating disk 10 and a pin 12 is eccentrically fixed at the bottom. The pin 12 is slidably disposed in the coarse adjustment groove 201. The upper end of the connecting shaft 11 passes through the top edge of the outer shell 1 and is rotatably connected to the outer shell 1. A rotating wheel 13 is coaxially fixed on the top of the connecting shaft 11, and a locking bolt 14 is provided on one side of the connecting shaft 11 to restrict the rotational freedom of the connecting shaft 11.

[0026] When it is necessary to determine the distance between the corresponding line pairs of the comb teeth edge lines on the fixed clamping plate 3 and the movable clamping plate 4, firstly, by rotating the rotating wheel 13, the rotating disk 10 is driven to rotate via the connecting shaft 11, thereby causing the pin 12 to move in the coarse adjustment groove 201 and press against the side wall of the coarse adjustment groove 201, which in turn drives the movable track 2 to slide along the inner wall of the outer shell 1. The movable clamping plate 4 moves synchronously with the movable track 2 to achieve the purpose of coarsely adjusting the comb teeth line pairs. After the coarse adjustment is completed, the locking bolt 14 is tightened to fix the connecting shaft 11. It should be noted that during the coarse adjustment process, the guide shaft 7 and the drive sleeve 8 only slide relative to each other.

[0027] Based on the coarse adjustment, further fine adjustment is performed. Rotating the adjustment knob 9, driven by the drive sleeve 8 and guide shaft 7, rotates the rotating end of the screw-in assembly 6. Its telescopic end drives the moving clamp 4 to move relative to the moving track 2 for fine adjustment, thereby achieving the corresponding target line pair distance and improving adjustment accuracy. It should be noted that during measurement, the inner cavity of the outer shell 1 is filled with an imaging aqueous solution.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An apparatus for measuring magnetic resonance radio frequency coil imaging resolution, characterized by: The shell (1) includes a hollow container structure. The inner sidewalls of the shell (1) are provided with a fixed clamp (3) and a movable clamp (4). Several staggered comb teeth are provided on the opposite sides of the two clamps. The gap between adjacent comb teeth is adjusted by a coarse adjustment component and a fine adjustment component. The coarse adjustment component includes a movable track (2) slidably disposed on the side wall of the outer shell (1), and a movable clamp (4) is slidably disposed in the movable track (2). When the coarse adjustment component adjusts the movable track (2), the movable clamp (4) moves synchronously with the movable track (2). The fine adjustment component is used to adjust the relative position between the movable track (2) and the movable clamp (4).

2. A device for measuring the imaging resolution of a magnetic resonance radio frequency coil according to claim 1, characterized in that, The coarse adjustment component includes a rotating disk (10) rotatably mounted above the moving track (2). The moving track (2) has a coarse adjustment groove (201). A pin (12) is eccentrically mounted on the bottom of the rotating disk (10). The pin (12) cooperates with the coarse adjustment groove (201). The rotating disk (10) is driven by a connecting shaft (11) rotatably connected to the outer casing (1).

3. A device for measuring the imaging resolution of a magnetic resonance radio frequency coil according to claim 2, characterized in that, A locking bolt (14) is provided on one side of the connecting shaft (11) to restrict its rotational freedom.

4. A device for measuring the imaging resolution of a magnetic resonance radio frequency coil according to claim 1, characterized in that, The fine-tuning component includes a fixed block (5) fixed to one end of the slide groove of the moving track (2), and a screw-in component (6) is installed through the fixed block (5). The telescopic end of the screw-in component (6) is fixedly connected to the moving clamp (4). The rotation adjustment end of the screw-in component (6) is coaxially fixed with a guide shaft (7). A drive sleeve (8) is slidably sleeved on the outside of the guide shaft (7) through a spline. The drive sleeve (8) passes through the outer shell (1) and is connected to the adjustment knob (9).

5. A device for measuring the imaging resolution of a magnetic resonance radio frequency coil according to claim 4, characterized in that, A rotating sealing ring is provided at the point where the drive sleeve (8) passes through the outer shell (1), and a rotating damping is provided.

6. A device for measuring the imaging resolution of a magnetic resonance radio frequency coil according to claim 4, characterized in that, The adjustment knob (9) has anti-slip texture on its surface and angle scale markings on its outer periphery.

7. The device for measuring the imaging resolution of a magnetic resonance radio frequency coil according to claim 4, wherein the components of the advance assembly (6) are made of non-magnetic materials, and the structure and implementation principle of the advance assembly (6) are the same as those of a micrometer.

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