Automatic quality control device for gamma knife

Abstract

The invention relates to an automatic quality control device for a gamma knife. The device comprises a base, a die body assembly and a rotation driving assembly capable of driving the die body assembly to rotate, the die body assembly is arranged on the base and can rotate relative to the base, the die body assembly comprises a die body main body, a flat panel detector, a driving shaft and a steel ball, a mounting groove is formed in the middle of the die body main body, and the flat panel detector is embedded in the mounting groove; a plurality of mounting holes are formed in the front end of the die main body, the steel balls are correspondingly arranged in the mounting holes one by one, an end cover is arranged at the front end of the die main body, a driving shaft is arranged at the rear end of the die main body, and the die main body is connected with the rotary driving assembly through the driving shaft. According to the invention, the efficiency and reliability of quality control work are greatly improved, and the safety and accuracy of gamma knife treatment are guaranteed.

Description

Technical Field

[0001] This invention relates to the medical field, and more particularly to an automated quality control device for Gamma Knife. Background Technology

[0002] Quality assurance and control for Gamma Knife radiosurgery are crucial for ensuring therapeutic efficacy. The quality assurance process for Gamma Knife involves multiple aspects, including the mechanical precision and dose output of the equipment, the spatial accuracy of image localization, and the validation of the dosage plan. Currently, commonly used quality control equipment and methods for Gamma Knife radiosurgery have the following main drawbacks: 1. There are many types of quality control equipment, but each type has a single function; 2. The quality control equipment has a low degree of automation and all require manual operation; 3. The results processing involves many manual intervention steps, which can easily introduce human error.

[0003] Therefore, it is necessary to provide an automated quality control device for Gamma Knife radiosurgery to improve the efficiency of Gamma Knife radiosurgery, reduce errors caused by manual operation during the quality control process, and ensure the effectiveness of Gamma Knife radiotherapy. Summary of the Invention

[0004] To address the aforementioned technical problems in the background art, this invention provides an automated quality control device for Gamma Knife treatment. This device integrates testing equipment to measure image registration accuracy, centering of the Gamma Knife device, dosimetric parameters, etc., greatly improving the efficiency and reliability of quality control work and ensuring the safety and precision of Gamma Knife treatment.

[0005] The technical solution of this invention is as follows: This invention is an automatic quality control device for gamma knife, characterized in that: the automatic quality control device for gamma knife includes a base, a mold assembly, and a rotary drive assembly capable of driving the mold assembly to rotate. The mold assembly is mounted on the base and can rotate relative to the base. The mold assembly includes a mold body, a flat plate detector, a drive shaft, and steel balls. A mounting groove is provided in the middle of the mold body, and the flat plate detector is embedded in the mounting groove. Multiple mounting holes are provided at the front end of the mold body, and multiple steel balls are correspondingly installed in the mounting holes. An end cap is provided at the front end, and a drive shaft is provided at the rear end. The mold body is connected to the rotary drive assembly through the drive shaft.

[0006] Furthermore, there are five steel balls. One steel ball is placed at the front center of the main body of the mold, and the other four steel balls are projected symmetrically around the central steel ball.

[0007] Furthermore, the main body of the mold is a cylinder with a notch in the middle, and an installation groove is provided at the bottom of the notch.

[0008] Furthermore, the Gamma Knife automatic quality control device also includes a mold cover, which is located at the notch in the middle of the mold body and positioned above the flat panel detector.

[0009] Furthermore, both the main body of the mold and the top cover are made of plexiglass.

[0010] Furthermore, the rotary drive assembly includes a speed reducer and a motor, with the drive shaft connected via the speed reducer and the motor.

[0011] Furthermore, the base is a U-shaped base, and the main body of the mold is set on the two side walls of the U-shaped base through the end caps at both ends and the drive shaft. The rotation drive assembly also includes a support seat, and the reducer is set on the support seat, which is set on the side wall of the U-shaped base.

[0012] Furthermore, a bracket is provided on the base, and the main body of the mold is mounted on the bracket through end caps at both ends and a drive shaft. The rotation drive assembly also includes a support base, a reducer is mounted on the support base, and the support base is mounted on the bracket.

[0013] Furthermore, the flat panel detector is an MV-level flat panel detector.

[0014] This invention provides an automated quality control device for Gamma Knife, which utilizes the concepts of integration, automation, intelligence, standardization, and high efficiency. By integrating a rotating mechanism, an MV-level flat panel detector, and an acrylic phantom into one unit, it enables the testing of image registration accuracy, center accuracy of the Gamma Knife device, dosimetric parameters, etc., on a single testing device. This greatly improves the efficiency and reliability of quality control work and ensures the safety and precision of Gamma Knife treatment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the phantom assembly of the present invention; Figure 3 This is a schematic diagram of the installation positions of the steel ball and flat panel detector of the present invention; Figure 4 This is a schematic diagram of the structure of the rotary drive assembly of the present invention; Figure 5 This is a schematic diagram of the invention installed on a positioning bed; Figure 6 This is a schematic diagram illustrating the application of the present invention.

[0016] The annotations in the attached figures are explained as follows: 1. Base; 2. Mold assembly; 3. Rotary drive assembly; 4. Gamma knife automatic quality control device; 5. Positioning bed; 6. Gamma knife main unit.

[0017] 2.1 Main body of the mold; 2.2 Flat panel detector; 2.3 Mold top cover; 2.4 Drive shaft; 2.5 Steel ball; 2.6 End cap; 2.7 Mounting hole; 2.8 Mounting groove.

[0018] 3.1 Support base; 3.2 Reducer; 3.3 Motor. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] See Figure 1 The structure of this invention, in a specific embodiment, includes a base 1, a mold assembly 2, and a rotation drive assembly 3. The mold assembly 2 is disposed on the base 1, and the rotation drive assembly 3 can drive the mold assembly 2 to rotate relative to the base 1. The mold assembly 2 can be disposed on the base 1 in two ways: one is that the base 1 is a U-shaped base, with both ends of the mold body supported on the side walls of the U-shaped base; the other is that a support is provided on the base, with both ends of the mold body supported on the support.

[0021] See Figure 2 , 3 The structure of the mold assembly 2 of the present invention includes a mold body 2.1, a flat panel detector 2.2, a mold top cover 2.3, a drive shaft 2.4, steel balls 2.5, and an end cap 2.6. The mold body 2.1 is a cylinder with a notch in the middle, and a mounting groove is provided at the bottom of the notch. The flat panel detector 2.2 is embedded in the mounting groove. The steel balls 2.5 are embedded in the mounting holes at the front end of the mold body 2.1. There are five steel balls 2.5, one of which is located at the center of the front end of the mold body, and the other four are symmetrically arranged around the central steel ball. The mold top cover 2.3 is installed at the notch in the middle of the mold body 2.1 and is placed above the flat panel detector 2.2. The end cap 2.6 is installed at the front end of the mold body 2.1, and the drive shaft 2.4 is installed at the rear end of the mold body 2.1.

[0022] The main body 2.1 and the upper cover 2.3 of the mold are both made of plexiglass. The main body 2.1 and the upper cover 2.3 together form a cylinder, constituting a plexiglass mold. The flat panel detector 2.2 is an MV-level flat panel detector.

[0023] See Figure 4 The structure of the rotary drive assembly 3 of the present invention includes a support base 3.1, a reducer 3.2 and a motor 3.3. The reducer 3.2 is mounted on the support base 3.1 and the motor 3.3 is connected to the reducer 3.2.

[0024] In the structure of Embodiment 1 of the present invention, the main body 2.1 of the mold is mounted on the U-shaped base through the drive shafts 2.4 and end caps 2.6 at both ends. The rotation drive assembly 3 is mounted on the side wall of the U-shaped base through the support 3.1. The output end of the reducer 3.2 is connected to the drive shaft 2.4 to realize the rotational movement of the mold assembly 2.

[0025] In the structure of Embodiment 2 of the present invention, the main body 2.1 of the mold is mounted on the bracket on the base 1 through the drive shafts 2.4 at both ends and the end caps 2.6. The rotation drive assembly 3 is mounted on the bracket through the support seat 3.1. The output end of the reducer 3.2 is connected to the drive shaft 2.4 to realize the rotational movement of the mold assembly 2.

[0026] See Figure 5 , 6 The process of using the automatic quality control device 4 for gamma knife treatment in this invention is as follows: Install the Gamma Knife automatic quality control device 4 onto the positioning bed 5. Adjust the position of the Gamma Knife automatic quality control device 4 according to the quality control items. Then move the positioning bed 5 to a suitable position within the treatment cavity of the Gamma Knife main unit 6 and perform calibration of imaging parameters, physical parameters, etc. The specific steps are as follows: 1) Gamma knife equipment isocenter accuracy test: 1.1) Install the automatic quality control device for the Gamma Knife onto the positioning bed; 1.2) Move the positioning bed to the center position of the gamma knife equipment (X=0, Y=0, Z=0); 1.3) Simultaneously rotate the Gamma Knife equipment and the Gamma Knife automatic quality control device to 0 degrees, turn on the Gamma Knife radiation source to irradiate the Gamma Knife automatic quality control device, and obtain the errors in both the X and Y directions. , ; 1.4) Simultaneously rotate the Gamma Knife equipment and the Gamma Knife automatic quality control device to 90 degrees, turn on the Gamma Knife radiation source to irradiate the Gamma Knife automatic quality control device, and obtain the error in the Z direction. ; 1.5) Using the formula This achieves the same centering accuracy as the Gamma Knife equipment.

[0027] 2) Image registration accuracy test: 2.1) Install the automatic quality control device for the Gamma Knife onto the positioning bed; 2.2) Move the positioning bed to the center position of the gamma knife equipment (X=0, Y=0, Z=0); 2.3) Move the positioning bed sequentially to (0,0,0), (10,10,10), (10,-10,-10), (-10,-10,10), (-10,10,-10) to perform head or body scans, and then perform registration. Use Amide and ImageJ to process the images before and after registration to obtain the image registration accuracy.

[0028] 3) Dosimetric parameter (focal dose rate, penumbra of radiation field, radiation field size) testing: 3.1) Install the automatic quality control device for the Gamma Knife onto the positioning bed; 3.2) Move the positioning bed to the center position of the gamma knife equipment (X=0, Y=0, Z=0); 3.3) Simultaneously rotate the Gamma Knife equipment and the Gamma Knife automatic quality control device to 0 degrees; 3.4) Switch to different collimators, turn on the Gamma Knife radiation source to irradiate the Gamma Knife automatic quality control device, and obtain the focal dose rate, penumbra of the radiation field, and radiation field size of each collimator.

[0029] The technical contents of this invention and those not specifically described in the above embodiments are the same as those in the prior art.

[0030] The above are merely specific embodiments disclosed in this invention, but the scope of protection disclosed in this invention is not limited thereto. The scope of protection disclosed in this invention should be determined by the scope of the claims.

Claims

1. A gamma knife automatic quality control device, characterized in that: The gamma knife automatic quality control device comprises a base, a phantom assembly and a rotation driving assembly capable of driving the phantom assembly to rotate, the phantom assembly is arranged on the base and can rotate relative to the base, the phantom assembly comprises a phantom main body, a flat panel detector, a driving shaft and a steel ball, a mounting groove is arranged in the middle of the phantom main body, the flat panel detector is embedded in the mounting groove, a plurality of mounting holes are arranged at the front end of the phantom main body, the steel ball corresponds to the mounting holes and is arranged in the mounting holes one by one, an end cover is arranged at the front end, and a driving shaft is arranged at the rear end, and the phantom main body is connected with the rotation driving assembly through the driving shaft.

2. The automatic quality control device for Gamma knife according to claim 1, characterized in that: The steel ball is five, one steel ball is arranged at the center of the front end of the phantom main body, and the other four steel balls are arranged around the center steel ball in a central symmetric manner.

3. The automatic quality control device for Gamma knife according to claim 2, characterized in that: The phantom main body is a cylinder with a notch arranged in the middle, and the notch is provided with a mounting groove at the bottom.

4. The automatic quality control device for Gamma knife according to claim 3, characterized in that: The gamma knife automatic quality control device further comprises a phantom upper cover, the phantom upper cover is arranged at the notch in the middle of the phantom main body and is arranged above the flat panel detector.

5. The gamma knife automatic quality control device according to claim 4, characterized in that: The material of the phantom main body and the phantom upper cover is organic glass.

6. The gamma knife automatic quality control device according to claim 5, characterized in that: The rotation driving assembly comprises a speed reducer and a motor, and the driving shaft is connected with the speed reducer and the motor.

7. The gamma knife automatic quality control device according to claim 6, characterized in that: The base is a U-shaped base, the phantom main body is arranged on the two side walls of the U-shaped base through the end covers and the driving shafts at the two ends, the rotation driving assembly further comprises a support seat, the speed reducer is arranged on the support seat, and the support seat is arranged on the side wall of the U-shaped base.

8. The automatic quality control device for Gamma knife according to claim 6, characterized in that: The base is provided with a support, the phantom main body is arranged on the support through the end covers and the driving shafts at the two ends, the rotation driving assembly further comprises a support seat, the speed reducer is arranged on the support seat, and the support seat is arranged on the support.

9. The gamma knife automatic quality control device according to claim 7 or 8, characterized in that: The flat panel detector is an MV-level flat panel detector.

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