Fixing and adjusting device for AQA die body of cyber knife

Abstract

The utility model discloses a cyber knife AQA die body fixing and adjusting device. The cyber knife AQA die body fixing and adjusting device comprises a base, a fixing assembly and a movable bubble. The base is provided with a fixing groove used for containing a cyber knife AQA die body. The movable bubble is movably placed on the base; a cross center line and scale values are arranged on the base, and the cross center line coincides with the center line of the fixing groove and coincides with the scale values; the fixing assemblies are connected with the bottom of the base and arranged in the circumferential direction of the base at intervals. During use, a positioning laser lamp line of the cyber knife AQA die body placed in the fixing groove coincides with a cross center line, the fixing assembly is adjusted to enable the movable bubble to be located in the middle of the base, the base is kept horizontal, then multiple times of orthogonal image shooting are conducted on the cyber knife AQA die body, the positioning error of the cyber knife AQA die body is obtained, and the positioning accuracy of the cyber knife AQA die body is improved. And the angle of the wave cutter AQA die body is adjusted according to the scale value, so that the precision requirement of the wave cutter AQA die body for positioning is met.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and more specifically, to a CyberKnife AQA phantom fixing and adjusting device. Background Technology

[0002] As a specialized device for stereotactic radiotherapy, CyberKnife requires comprehensive quality assurance procedures and stringent quality control measures. Automated Quality Assurance (AQA) testing in CyberKnife radiotherapy quality control involves using a phantom to simulate the clinical radiotherapy process. From scanning the phantom to develop the radiotherapy plan (initial stage) to completing irradiation (final stage), it tests the mechanical precision of the CyberKnife robotic arm's radiotherapy device for positioning and tracking accuracy. AQA testing aims to determine the overall positional deviation of the robotic arm's radiotherapy device for each tracking mode. To ensure that AQA testing can accurately measure the current mechanical positioning accuracy of the CyberKnife, the requirements for the AQA phantom's positioning accuracy are extremely high (translational deviation less than 0.2 mm, angular rotation deviation less than 0.2 degrees). Ideally, the positioning error should be as close to zero as possible.

[0003] Currently, existing CyberKnife 6D treatment beds are expensive, and most hospitals typically use 5D treatment beds. However, 5D treatment beds cannot automatically correct horizontal angular errors, requiring manual adjustments by operators. Since there are no angle scales on the phantom, each manual adjustment relies solely on intuition for error correction, which is highly inaccurate. Inexperienced operators may need to perform multiple manual adjustments and repeatedly take X-ray images of the phantom to achieve the required tolerance. This process not only delays subsequent patient treatment but also causes unnecessary wear and tear on the machine.

[0004] Furthermore, five-dimensional treatment beds are mostly made of carbon fiber, which has relatively low hardness and rigidity. Therefore, deformation is inevitable as the service life increases. Even when the treatment bed is initially unloaded, it cannot be guaranteed to be in a horizontal position without deviations in tilt, rotation, or pitch. This will inevitably introduce errors into the AQA test results and reduce the reliability of quality control.

[0005] Therefore, how to provide a fixing and adjusting device for the AQA wave-splitter has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0006] One objective of this invention is to provide a new technical solution for a wave-splitter AQA mold fixing and adjusting device.

[0007] According to a first aspect of the present invention, a fixing and adjusting device for a wave-sweeping AQA mold body is provided, comprising: a base, a fixing component, and a movable bubble;

[0008] The base is provided with a fixing groove for placing the AQA beam cutter mold; the movable bubble is movably placed on the base; and the base is provided with a cross center line and scale values, the cross center line coincides with the center line of the fixing groove, and the scale values ​​coincide with the cross center line.

[0009] The fixing components are connected to the bottom of the base, and the fixing components are spaced apart along the circumference of the base to fix the base and adjust the height of the base.

[0010] Optionally, the base is made of a polycarbonate material with low radiation attenuation and high strength.

[0011] Optionally, the fixing groove has a square structure, and the bottom of the fixing groove is provided with anti-slip texture.

[0012] Optionally, a limit ring is provided on the outer edge of the base to restrict the movement of the bubble.

[0013] Optionally, the fixing component includes a support leg and a fixing connecting column. The outer peripheral wall of the support leg is provided with an external thread. The first end of the fixing connecting column is connected to the base, and the second end of the fixing connecting column is provided with a threaded hole. The support leg is connected to the threaded hole through the external thread.

[0014] Optionally, the fixing component further includes an anti-slip rubber pad, which is connected to the support leg.

[0015] Optionally, the support leg is made of low-radiation-attenuation and high-strength plastic.

[0016] The beneficial effects of this utility model are as follows:

[0017] This invention features a fixing groove on the base for securing the AQA (Area QA, a type of laser cutter) mold, allowing a movable bubble to be placed on the base. A crosshair and scale values ​​are set on the base, with the crosshair coinciding with the center line of the fixing groove and the scale values ​​coinciding with the crosshair. Fixing components are connected to the bottom of the base and are spaced apart along the circumference of the base. In use, the operator places the AQA mold in the fixing groove, aligning the laser line of the AQA mold's placement with the crosshair. The fixing components are adjusted to position the movable bubble in the center of the base, ensuring the base is level. Multiple orthogonal images of the AQA mold are then captured to obtain its placement error. The angle of the AQA mold is adjusted using the scale values ​​to achieve the required placement accuracy. This effectively improves the efficiency of AQA mold adjustment and the reliability of quality control, while reducing the operator's workload.

[0018] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with their description, serve to explain the principles of the present invention.

[0020] Figure 1 This is a structural diagram of the AQA mold fixing and adjusting device of the present invention.

[0021] The following are marked in the diagram: 1. Base; 11. Fixing groove; 2. Fixing component; 21. Support leg; 22. Fixing connecting column; 23. External thread; 24. Anti-slip rubber pad; 3. Moving bubble; 4. Cross center line; 5. Scale value. Detailed Implementation

[0022] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0023] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0024] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0025] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0026] like Figure 1 As shown, this utility model embodiment provides a wave-splitter AQA mold fixing and adjusting device, including: a base 1, a fixing component 2, and a movable bubble 3.

[0027] The base 1 is provided with a fixing groove 11, which is used to place the AQA beam cutter mold; the movable bubble 3 is movably placed on the base 1; and the base 1 is provided with a cross center line 4 and a scale value 5, the cross center line 4 coincides with the center line of the fixing groove 11, and the scale value 5 coincides with the cross center line 4.

[0028] Specifically, the fixing groove 11 is located on the upper surface of the base 1 and at the center of the base 1. The size of the fixing groove 11 is 6.35 cm * 6.35 cm, which is consistent with the bottom surface of the AQA beam cutter mold.

[0029] The center of the crosshair 4 coincides with the center of the fixing groove 11 and the center of the base 1. Furthermore, the crosshair 4 is completely aligned with the centerline of the AQA (Area-of-Earnings) module. The crosshair 4 is used to adjust the position of the AQA module. During use, the positioning laser of the AQA module is aligned with the crosshair 4 to ensure the AQA module is accurately placed at the center of the image, enabling orthogonal image capture to obtain the positioning error of the AQA module.

[0030] Furthermore, the scale value of 5 provides a reference for the five-dimensional treatment bed when manually adjusting the rotation angle of the CyberKnife AQA phantom, improving the accuracy of one-time correction, reducing the number of positioning operations, reducing machine wear and tear, and improving quality control efficiency.

[0031] The fixing component 2 is connected to the bottom of the base 1, and the fixing component 2 is spaced apart along the circumference of the base 1 to fix the base 1 and adjust the height of the base 1.

[0032] Since the end face of the base 1 is not horizontal, the base 1 is adjusted by the fixing component 2 so that the end face of the base 1 is kept horizontal. When the moving bubble 3 is located at the center of the base 1, it indicates that the base 1 is horizontal.

[0033] During use, the operator places the CyberShipA QA model in the fixed slot 11 and adjusts its position so that the positioning laser line of the CyberShipA QA model coincides with the crosshair center line 4. Next, the height of the adjusting fixing component 2 is adjusted to keep the end face of the base 1 horizontal, so that the moving bubble 3 is in the middle position of the base 1. Then, the CyberShipA QA model is subjected to its first orthogonal image capture to obtain the first positioning error value. The positioning error is then automatically corrected by a five-dimensional bed, ensuring that the errors in the forward / backward, left / right, and lifting directions are less than 0.2mm, and the errors in the pitch and tilt angles are less than 0.2°.

[0034] Next, a second orthogonal image is taken of the AQA beam cutter model to obtain the second positioning error value. Based on the preset horizontal rotation error value provided by the system, the operator manually rotates the AQA beam cutter model. The rotation angle can be adjusted using an angle scale to make the rotation angle as close as possible to the preset error value provided by the system. After adjusting the AQA beam cutter model, a third orthogonal image is taken to obtain the third positioning error value. The positioning accuracy requirements for the AQA beam cutter model are met when the absolute value of the difference between the third positioning error value and the preset error value meets the following conditions: translational error less than 2mm and angular rotation error less than 2°.

[0035] This utility model provides a fixing groove 11 for fixing the AQA mold body of the wave-splitter on the base 1, so that the movable bubble 3 can be movably placed on the base 1; and a cross center line 4 and a scale value 5 are provided on the base 1, with the cross center line 4 coinciding with the center line of the fixing groove 11 and the scale value 5 coinciding with the cross center line 4; the fixing component 2 is connected to the bottom of the base 1, and the fixing component 2 is arranged at intervals along the circumference of the base 1. During use, the operator places the AQA beam cutter in the fixed slot 11, aligning the positioning laser line of the AQA beam cutter with the crosshair center line 4. The operator then adjusts the fixing component 2 to position the moving bubble 3 in the center of the base 1, ensuring the base 1 remains horizontal. Multiple orthogonal image captures of the AQA beam cutter are then performed to obtain the positioning error. The angle of the AQA beam cutter is adjusted using the scale value 5 to achieve the required positioning accuracy. This effectively improves the adjustment efficiency and quality control reliability of the AQA beam cutter, while reducing the operator's workload.

[0036] In one embodiment of the AQA phantom fixing and adjusting device of this utility model, the base 1 is made of polycarbonate material with low radiation attenuation and high strength.

[0037] The base 1 of this utility model is made of non-metallic polycarbonate material with low radiation attenuation and high strength. It has low radiation attenuation and will not affect the selection of radiation irradiation angle. At the same time, it will not produce metal artifacts in the imaging, thus avoiding a reduction in image tracking accuracy.

[0038] In one embodiment of the AQA mold fixing and adjusting device of the present invention, the fixing groove 11 is a square structure, and the bottom of the fixing groove 11 is provided with anti-slip texture.

[0039] This invention increases the friction between the fixing groove 11 and the AQA beam cutter body by setting the fixing groove 11 as a square structure and setting anti-slip texture at the bottom of the fixing groove 11, thereby preventing the AQA beam cutter body from sliding on the base 1 and providing stable support.

[0040] In one embodiment of the AQA mold fixing and adjusting device of this utility model, in order to prevent the moving bubble 3 from moving out of the base 1, a limit ring is provided on the outer edge of the base 1 to restrict the moving bubble 3. The moving bubble 3 allows the operator to intuitively judge the horizontal state of the base 1, and the operation is simple.

[0041] In one embodiment of the AQA mold fixing and adjusting device of the present invention, the fixing component 2 includes a support leg 21 and a fixing connecting column 22. The outer peripheral wall of the support leg 21 is provided with an external thread 23. The first end of the fixing connecting column 22 is connected to the base 1, and the second end of the fixing connecting column 22 is provided with a threaded hole. The support leg 21 is connected to the threaded hole through the external thread 23.

[0042] Specifically, the fixing component 2 in this embodiment has three parts.

[0043] This invention provides an external thread 23 on the outer peripheral wall of the support leg 21, connects the first end of the fixed connecting column 22 to the base 1, and provides a threaded hole at the second end of the fixed connecting column 22, so that the support leg 21 is connected to the threaded hole through the external thread 23. Even if the five-dimensional treatment bed deforms, the height of each support leg 21 can be independently adjusted to ensure the level of the base 1, increase the positioning accuracy of the CyberKnife AQA model, and thus improve the accuracy and reliability of the verification.

[0044] In one embodiment of the AQA mold fixing and adjusting device of the present invention, the fixing component 2 further includes an anti-slip rubber pad 24, which is connected to the support leg 21 to increase friction, prevent the base 1 from sliding, and further provide stable support.

[0045] In one embodiment of the AQA phantom fixing and adjustment device of this utility model, the support leg 21 is made of low-attenuation and high-strength plastic, so as not to affect the selection of the ray irradiation angle, and at the same time, the imaging will not produce metal artifacts, thus avoiding the reduction of image tracking accuracy.

[0046] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A device for fixing and adjusting the AQA (Anti-QA) phantom body of a wave-sweeping blade, characterized in that, include: Base, fixing components, and moving bubble; The base is provided with a fixing groove for placing the AQA beam cutter mold; the movable bubble is movably placed on the base; and the base is provided with a cross center line and scale values, the cross center line coincides with the center line of the fixing groove, and the scale values ​​coincide with the cross center line. The fixing components are connected to the bottom of the base, and the fixing components are spaced apart along the circumference of the base to fix the base and adjust the height of the base.

2. The AQA phantom fixing and adjusting device for the wave-splitter according to claim 1, characterized in that, The base is made of polycarbonate material with low radiation attenuation and high strength.

3. The AQA phantom fixing and adjusting device for the wave-sweeping cutter according to claim 1, characterized in that, The fixing groove has a square structure, and the bottom of the fixing groove is provided with anti-slip texture.

4. The AQA phantom fixing and adjusting device for the wave-sweeping cutter according to claim 1, characterized in that, A limit ring is provided on the outer edge of the base to restrict the movement of the bubble.

5. The AQA phantom fixing and adjusting device for the wave-splitter according to any one of claims 1-4, characterized in that, The fixing component includes a support leg and a fixing connecting column. The outer peripheral wall of the support leg is provided with an external thread. The first end of the fixing connecting column is connected to the base, and the second end of the fixing connecting column is provided with a threaded hole. The support leg is connected to the threaded hole through the external thread.

6. The AQA phantom fixing and adjusting device for the wave-sweeping cutter according to claim 5, characterized in that, The fixing component also includes an anti-slip rubber pad, which is connected to the support leg.

7. The AQA phantom fixing and adjusting device for the wave-splitter according to claim 6, characterized in that, The support legs are made of low-radiation-attenuation, high-strength plastic.

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