Accuracy calibration device for patient positioning system of proton radiotherapy

Abstract

The application provides a precision calibration device of a patient positioning system for proton radiotherapy, comprising a base plate, a measuring target ball assembly arranged on the base plate, the measuring target ball assembly comprising a target ball support, a target ball mounting portion being arranged on the target ball support and configured to mount a measuring target ball for measuring a reference point of the patient positioning system, a load applying assembly arranged on the base plate, the load applying assembly comprising a load and a load support, the load being arranged on the load support and having an adjustable weight, and a driving module connected to the base plate and configured to drive the base plate to move. According to the precision calibration device of the patient positioning system for proton radiotherapy, the load applying assembly and the driving module are arranged, and the measured deformation displacement data is used as a measurement sample point of the precision calibration device of the patient positioning system for proton radiotherapy, so that the diseased part of the patient can be treated accurately, and the treatment effect can be improved.

Description

Technical Field

[0001] This invention relates to the field of manufacturing technology of precision calibration devices for proton radiotherapy patient positioning systems, and in particular to a precision calibration device for a proton radiotherapy patient positioning system. Background Technology

[0002] In existing patient positioning systems, when a patient lies on the system during treatment, the patient's weight causes the system to deform, and the patient moves with the system. This makes it difficult to accurately locate the lesion, which in turn affects the effectiveness of radiotherapy. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention provides a precision calibration device for a proton radiotherapy patient positioning system, which can improve the treatment effect on patients.

[0004] According to an embodiment of the present invention, a precision calibration device for a proton radiotherapy patient positioning system includes: a base plate; a measuring target ball assembly disposed on the base plate, the measuring target ball assembly including a target ball support, the target ball support having a target ball mounting portion configured to mount a measuring target ball for measuring a reference point of the patient positioning system; a load application assembly disposed on the base plate, the load application assembly including a load and a load support, the load being disposed on the load support, the weight of the load being adjustable; and a drive module connected to the base plate for driving the base plate to move.

[0005] The precision calibration device for the proton radiotherapy patient positioning system according to the present invention includes an applied load assembly and a drive module, which can simulate the displacement data of the target ball support deformation caused by different loads. The measured deformation displacement data is used as the measurement sample points of the precision calibration device for the proton radiotherapy patient positioning system, which can accurately treat the lesion site of the patient and thus improve the treatment effect.

[0006] According to some embodiments of the present invention, the load support includes: a support rod, on which a through hole is formed, and the load passes through the through hole onto the support rod.

[0007] According to some optional embodiments of the present invention, the support rod is formed as a circular tube; and / or, there are multiple support rods, which are arranged in parallel at intervals, and the load is provided with multiple through holes, each of which corresponds to one of the multiple support rods.

[0008] According to some embodiments of the present invention, the support rod is provided with limiting posts extending outward along the radial direction of the support rod, the limiting posts being disposed at both ends of the support rod in the length direction, and the load being disposed between the limiting posts at both ends of the support rod.

[0009] According to some embodiments of the present invention, the load support further includes: a support column, which is vertically arranged and its lower end is connected to the base plate; a support plate, which is horizontally arranged and fixed to the upper end of the support column; and a support block, which is fixed to the upper side of the support plate, and the support rod is connected to the support block.

[0010] According to some optional embodiments of the present invention, a through hole is formed on the support block in a horizontal direction, and the support rod passes through the through hole and is fixed to the support block; or, the support column is a hollow cylindrical shape.

[0011] According to some embodiments of the present invention, the load includes a plurality of counterweights, the number of which is adjustable.

[0012] According to some embodiments of the present invention, the load application assembly further includes a clamping mechanism disposed on the load and / or the load support, the clamping mechanism being configured to secure the load to the load support.

[0013] According to some embodiments of the present invention, the precision calibration device of the proton radiotherapy patient positioning system further includes: a connecting bracket, the connecting bracket extending vertically, the lower end of the connecting bracket being connected to the base plate, and the measuring target ball assembly being fixed to the upper end of the connecting bracket.

[0014] According to some alternative embodiments of the present invention, the connecting bracket includes: a first support plate and a second support plate arranged at a distance in the horizontal direction, both the first support plate and the second support plate being connected between the measuring target ball assembly and the base plate.

[0015] According to some embodiments of the present invention, the target ball assembly further includes: a plurality of measuring target balls, the measuring target ball assembly having a plurality of mounting holes, the plurality of measuring target balls corresponding one-to-one with the plurality of mounting holes and disposed at the corresponding mounting hole positions.

[0016] According to some optional embodiments of the present invention, the precision calibration device of the proton radiotherapy patient positioning system further includes: an adjustment structure, the adjustment mechanism being connected to the measuring target ball for adjusting the height of the measuring target ball in the vertical direction.

[0017] According to some embodiments of the present invention, the drive module is a pneumatic quick-change module.

[0018] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of an angle of the precision calibration device of the proton radiotherapy patient positioning system according to an embodiment of the present invention;

[0020] Figure 2 yes Figure 1 Another schematic diagram of the precision calibration device of the proton radiotherapy patient positioning system shown;

[0021] Figure 3 yes Figure 1 A schematic diagram from another angle of the precision calibration device for the proton radiotherapy patient positioning system shown;

[0022] Figure 4 yes Figure 1 This is another schematic diagram of the precision calibration device of the proton radiotherapy patient positioning system shown.

[0023] Figure label:

[0024] 100. Precision calibration device for proton radiotherapy patient positioning system;

[0025] 10. Base plate;

[0026] 20. Measuring target ball assembly; 21. Target ball bracket; 22. Mounting hole;

[0027] 30. Load application assembly; 31. Load; 32. Load bracket; 321. Support rod; 3211. Limiting post; 322. Support column; 323. Support plate; 324. Support block;

[0028] 40. Driver module;

[0029] 50. Connecting bracket; 51. First support plate; 52. Second support plate. Detailed Implementation

[0030] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0031] The following is a reference appendix. Figures 1-4 A precision calibration device 100 for a proton radiotherapy patient positioning system according to an embodiment of the present invention is described.

[0032] Reference Figure 1 and Figure 2 According to an embodiment of the present invention, the precision calibration device 100 for a proton radiotherapy patient positioning system includes: a base plate 10, a measuring target ball assembly 20, an applied load assembly 30, and a drive module 40.

[0033] Specifically, the measuring target ball assembly 20 is mounted on the base plate 10. The measuring target ball assembly 20 includes a target ball support 21, on which a target ball mounting part is provided. The target ball mounting part is configured to mount a measuring target ball for measuring the reference point of the patient positioning system. The load application assembly 30 is mounted on the base plate 10. The load application assembly 30 includes a load 31 and a load support 32. The load 31 is mounted on the load support 32, and the weight of the load 31 is adjustable. The drive module 40 is connected to the base plate 10 for driving the movement of the base plate 10.

[0034] For example, such as Figure 1 and Figure 2 As shown, the measuring target ball assembly 20 is mounted on and fixedly connected to the base plate 10, the load application assembly 30 is mounted on and fixedly connected to the base plate 10, and the load application assembly 30 is located between the measuring target ball assembly 20 and the base plate 10. The drive module 40 is located on the lower side of the base plate 10. Preferably, the drive module 40 is screwed to the base plate 10, thereby ensuring the strength of the connection between the drive module 40 and the base plate 10.

[0035] When using the precision calibration device 100 of the proton radiotherapy patient positioning system, the measuring target ball first measures the coordinate data of the reference point on the target ball support 21. Then, the load 31 is installed on the load support 32. Under the gravity of the load 31, the load 31 will cause one end of the target ball support 21 to deform downwards. At this time, the measuring target ball measures the coordinate data of the reference point on the target ball support 21 again. The two coordinate data are compared to obtain the displacement of the reference point on the target ball support 21 under the load 31. Subsequently, different loads 31 are applied to obtain the deformation displacement data of the target ball support 21 under different loads 31, thereby simulating the deformation displacement data generated by patients of different weights lying on the positioning system. Furthermore, the drive module 40 can rotate the target ball support 21 to different positions, which can further simulate the deformation displacement of the target ball support 21 at different angles of the load 31. During patient treatment, the lesion site of the patient can be accurately calibrated based on the measured deformation displacement data, thereby enabling accurate treatment of the lesion site.

[0036] The precision calibration device 100 of the proton radiotherapy patient positioning system of the present invention includes a load application assembly 30 and a drive module 40. By adjusting different loads 31, it can accurately simulate the displacement data of the target ball support 21 caused by the deformation of different loads 31. When treating a patient, the measured deformation displacement data can be used as the measurement sample points of the precision calibration device 100 of the proton radiotherapy patient positioning system, which can accurately calibrate the lesion site of the patient, thereby enabling precise treatment of the lesion site and improving the treatment effect. Furthermore, the drive module 40 can simulate the deformation displacement of the target ball support 21 caused by the load 31 at different angles, thereby realistically simulating the patient's treatment process, ensuring the authenticity and accuracy of the calibration data, and further improving the treatment effect.

[0037] According to an embodiment of the present invention, the precision calibration device 100 of the proton radiotherapy patient positioning system is provided with an applied load assembly 30 and a drive module 40. It can simulate the displacement data of the target ball support 21 caused by different loads 31. The measured deformation displacement data is used as the measurement sample points of the precision calibration device 100 of the proton radiotherapy patient positioning system, so as to accurately treat the lesion site of the patient and thus improve the treatment effect.

[0038] According to some embodiments of the present invention, with reference to Figure 1 and Figure 2 The load support 32 includes a support rod 321, and a through hole is formed in the load 31, through which the load 31 passes. In this way, the through hole facilitates the insertion of the support rod 321 into the load 31, thereby facilitating the installation of the support rod 321 and the load 31.

[0039] According to some optional embodiments of the present invention, refer to Figure 1 and Figure 2 The support rod 321 is formed as a circular tube. In this way, when the load 31 is installed on the support rod 321, the friction of the load 31 on the support rod 321 can be reduced, thereby facilitating the installation of the load 31.

[0040] Furthermore, such as Figure 1 and Figure 2As shown, there are multiple support rods 321, meaning there can be two, three, four, or more support rods 321 arranged in parallel at intervals. The load 31 has multiple perforations, each corresponding to one of the support rods 321. Therefore, the multiple support rods 321 provide stable support to the load 31, preventing it from swaying along the rods. Simultaneously, the multiple support rods 321 increase their strength, preventing them from bending under the load 31, thus allowing the load 31 to accurately simulate the deformation of the positioning system caused by the patient.

[0041] For example, such as Figure 1 and Figure 2 As shown, two support rods 321 are provided. The two support rods 321 are arranged parallel to each other in the front-to-back direction and extend in the left-to-right direction. The load 31 is provided with two through holes, and the two support rods 321 pass through the corresponding through holes respectively.

[0042] According to some embodiments of the present invention, with reference to Figure 1 and Figure 2 The support rod 321 is provided with a limiting post 3211 extending outward along the radial direction of the support rod 321. The limiting post 3211 is located on the support rod 321 in the length direction (e.g., Figure 1 The upper two ends (as shown in the left and right directions) Figure 1 The load 31 is positioned between the limiting posts 3211 at both ends of the support rod 321 (shown at the left and right ends). Thus, when the load 31 is installed along the length of the support rod 321, the limiting posts 3211 prevent the load 31 from sliding off the support rod 321, thereby facilitating the installation of the load 31.

[0043] For example, such as Figure 1 and Figure 2 As shown, at both ends of each support rod 321, there are limiting posts 3211 extending in the vertical direction. The limiting posts 3211 are higher than the surface of the support rod 321, so as to limit the load 31.

[0044] According to some embodiments of the present invention, with reference to Figure 1 and Figure 2 The load support 32 also includes: a support column 322, a support plate 323, and a support block 324. Specifically, the support column 322 is vertically arranged, and the lower end of the support column 322 (e.g., Figure 1 The lower end of the support column 322 shown is connected to the base plate 10; the support plate 323 is horizontally arranged and fixed to the upper end of the support column 322 (e.g., the lower end of the support column 322 is connected to the base plate 10); ... Figure 1 The upper end of the support column 322 shown); the support block 324 is fixed to the upper side of the support plate 323 (as shown). Figure 1(On the upper side of the support plate 323 shown), the support rod 321 is connected to the support block 324.

[0045] In this way, the support column 322 can be connected to the base plate 10, so that the load application assembly 30 can be easily connected to the base plate 10 through the support column 322. The support plate 323 can connect the support column 322 and the support block 324. The support block 324 is connected to the support rod 321, so that the support rod 321 is fixedly connected to the base plate 10, thereby achieving a fixed connection between the load application assembly 30 and the base plate 10.

[0046] For example, such as Figure 1 and Figure 2 As shown, the support column 322 extends vertically and is perpendicular to the arrangement direction of the base plate. The lower end of the support column 322 is connected to the upper surface of the base plate 10. The support plate 323 is connected to the upper end of the support column 322 and is a horizontally arranged rectangular plate. The support plate 323 is connected to support blocks 324 arranged at intervals in the front-back direction. The support blocks 324 are fixedly connected to the support rod 321. Preferably, the diameter of the support column 322 is larger than the diameter of the support rod 321. This ensures the strength of the support column 322, thereby allowing the load application assembly 30 to be stably connected to the base plate 10 through the support column 322.

[0047] According to some optional embodiments of the present invention, refer to Figure 1 and Figure 2 The support block 324 has a horizontally oriented (e.g.) Figure 1 The support rod 321 passes through the support block 324 in the left-right direction (as shown), and is fixed to the support block 324. This facilitates the cooperation between the support rod 321 and the support block 324, thereby facilitating the installation of the support block 324.

[0048] For example, such as Figure 1 and Figure 2 As shown, the support block 324 is a cuboid, and a through hole is formed on the support block 324 in the left-right direction.

[0049] Furthermore, such as Figure 1 and Figure 2 As shown, the support column 322 is a hollow cylinder. This reduces the weight of the support column 322, ensuring that the drive module 40 can drive the measuring target ball assembly 20 to move normally. At the same time, a lower-power drive module 40 can drive the measuring target ball assembly 20, thereby reducing production costs.

[0050] According to some embodiments of the present invention, with reference to Figure 1 and Figure 2The load 31 includes multiple counterweights, which may include two, three, four, or more counterweights, and the number of counterweights is adjustable. By adjusting the number of counterweights, the effect of different patient weights on the deformation of the target ball support 21 can be simulated, thus ensuring the accuracy of the calibration data. Furthermore, this calibration adjustment method is simple and easy to operate, and the counterweights are reusable, thereby reducing calibration costs.

[0051] For example, such as Figure 1 and Figure 2 As shown, multiple counterweights are arranged at intervals along the left and right sides, and are connected to each other. This prevents the counterweights from separating and failing to calibrate accurate data. Preferably, each counterweight weighs between 8kg and 12kg. This prevents the counterweights from being too light, requiring multiple counterweights to simulate the patient's weight, thus facilitating simulation. Simultaneously, it prevents the counterweights from being too heavy, hindering precise simulation and calibration, thereby ensuring the accuracy of the measurement data.

[0052] According to some optional embodiments of the present invention, refer to Figure 1 and Figure 2 The load application assembly 30 also includes a clamping mechanism, which is disposed on the load 31 and / or the load support 32. That is, the clamping mechanism can be disposed on the load 31, or on the load support 32, or on both the load 31 and the load support 32. The clamping mechanism is configured to fix the load 31 to the load support 32. Thus, when the drive module 40 drives the measuring target ball assembly 20 to move, the clamping mechanism can prevent the load 31 from wobbling relative to the load support 32, thereby preventing the measuring target ball assembly 20 from wobbling due to the movement of the load 31, and ensuring the accuracy of the deformation displacement data of the target ball support 21 measured by the measuring target ball.

[0053] According to some embodiments of the present invention, with reference to Figure 1 , Figure 2 and Figure 4 The precision calibration device 100 for the proton radiotherapy patient positioning system also includes: a connecting bracket 50, the connecting bracket 50 extending vertically, and the lower end of the connecting bracket 50 (e.g., Figure 2 The lower end of the connecting bracket 50 shown is connected to the base plate 10, and the measuring target ball assembly 20 is fixed to the upper end of the connecting bracket 50 (e.g., Figure 2 (The lower end of the connecting bracket 50 shown). Thus, the connecting bracket 50 can fix the base plate 10 and the measuring target ball assembly 20 together, thereby enabling the measuring target ball assembly 20 to move synchronously with the base plate 10.

[0054] For example, such as Figure 1 , Figure 2 and Figure 4As shown, the connecting bracket 50 extends in the vertical direction. The upper end of the connecting bracket 50 is connected to the lower side of the right end of the measuring target ball assembly 20, and the lower end of the connecting bracket 50 is connected to the upper side of the base plate 10, thereby realizing the fixed connection between the base plate 10 and the measuring target ball assembly 20.

[0055] Furthermore, such as Figure 1 and Figure 2 As shown, the first support plate 51 is formed as an arc-shaped plate recessed in the direction away from the second support plate 52, and the second support plate 52 is also formed as an arc-shaped plate recessed in the direction away from the first support plate 51. Therefore, the support column 322 is cylindrical, and the first and second support plates 51 and 52 are designed as arc-shaped plates, which saves space occupied by the first and second support plates 51 and 52 on the base plate 10, facilitates the arrangement of other structures on the base plate 10, and, at the same time, this structural arrangement is reasonable and can effectively improve space utilization.

[0056] For example, such as Figure 1 and Figure 2 As shown, the first support plate 51 is located to the left of the second support plate 52. The first support plate 51 is an arc-shaped plate that is concave to the left, and the second support plate 52 is an arc-shaped plate that is concave to the right. The support column 322 is located between the first support plate 51 and the second support plate 52.

[0057] According to some embodiments of the present invention, with reference to Figure 1 , Figure 3 and Figure 4 The precision calibration device 100 for the proton radiotherapy patient positioning system also includes multiple measuring target balls. That is, the precision calibration device 100 for the proton radiotherapy patient positioning system may include two, three, four or more measuring target balls. The measuring target ball assembly 20 is provided with multiple mounting holes 22. That is, the measuring target ball assembly 20 may be provided with two, three, four or more mounting holes 22. The multiple measuring target balls correspond one-to-one with the multiple mounting holes 22 and are located at the corresponding mounting hole 22 positions.

[0058] In this way, the measuring target ball is mounted on the target ball holder 21, which facilitates the measurement of the displacement data of the reference point of the target ball holder 21. At the same time, multiple measuring target balls can improve measurement accuracy, thereby obtaining accurate calibration data. In addition, the mounting hole 22 provides a mounting position for the measuring target ball, thus facilitating its installation.

[0059] For example, such as Figure 1 , Figure 3 and Figure 4 As shown, the measuring target ball assembly 20 has three mounting holes 22, which are arranged at intervals in the front-to-back direction. The mounting holes 22 penetrate the measuring target ball assembly 20 in the up-down direction, and the measuring target ball is installed in the mounting holes 22.

[0060] According to some embodiments of the present invention, with reference to Figure 1 and Figure 2 The precision calibration device 100 for the proton radiotherapy patient positioning system also includes: an adjustment structure, the adjustment mechanism being connected to the measuring target ball for adjusting the measuring target ball in the vertical direction (e.g., Figure 1 The height (shown in the vertical direction) is [not specified]. This allows for convenient and accurate measurement of the patient's position using the target ball, thereby enabling accurate measurement of the deformation and displacement data of the target ball support 21. Preferably, the adjustment structure is a mechanical adjustment structure, which can reduce production costs.

[0061] According to some embodiments of the present invention, with reference to Figure 1 and Figure 2 The drive module 40 is a pneumatic quick-change module. This ensures that the drive module 40 can drive the measurement target ball assembly 20 to move.

[0062] The following is for reference. Figures 1-4 A precision calibration device 100 for a proton radiotherapy patient positioning system according to an embodiment of the present invention is described.

[0063] According to an embodiment of the present invention, a precision calibration device 100 for a proton radiotherapy patient positioning system includes: a base plate 10, a measuring target ball assembly 20, an applied load assembly 30, a measuring target ball, an adjustment mechanism, a drive module 40, and a connecting bracket 50. The measuring target ball assembly 20 and the applied load assembly 30 are connected to the base plate 10 via the connecting bracket 50, and the drive module 40 is connected to the base plate 10.

[0064] The base plate 10 is set horizontally, and the drive module 40 is connected to the lower surface of the base plate 10. The drive module 40 is screwed to the base plate 10.

[0065] The load application assembly 30 includes multiple loads 31 and a load support 32. Specifically, the load support 32 includes two support rods 321, limiting posts 3211, support posts 322, a support plate 323, and support blocks 324. The two support rods 321 extend in the left-right direction and are arranged parallel and spaced apart in the front-back direction. The loads 31 are provided with two through holes, through which the two support rods 321 pass. The left and right ends of the support rods 321 are provided with limiting posts 3211 extending in the up-down direction. The support posts 322 extend in the up-down direction. The lower end of the support posts 322 is connected to the base plate 10, and the upper end of the support posts 322 is connected to the support plate 323. The upper surface of the support plate 323 is connected to two support blocks 324, which are arranged spaced apart in the front-back direction. The support blocks 324 are provided with through holes extending through the support blocks 324 in the left-right direction, through which the support rods 321 pass.

[0066] The connecting bracket 50 extends vertically, and its upper end is connected to the measuring target ball assembly 20. The lower end of the connecting bracket 50 is connected to the base plate 10. The connecting bracket 50 includes a first support plate 51 and a second support plate 52, which are located on the left and right sides of the support column 322. The first support plate 51 is an arc-shaped plate that is concave to the left, and the second support plate 52 is an arc-shaped plate that is concave to the right.

[0067] The measuring target ball assembly 20 has three mounting holes 22 spaced apart along the front-to-back direction. The mounting holes 22 penetrate the measuring target ball assembly 20 along the vertical direction, and the measuring target ball is installed in the mounting holes 22. The adjustment mechanism can adjust the height of the measuring target ball in the vertical direction.

[0068] To install the precision calibration device 100 for the proton radiotherapy patient positioning system, first connect the lower end of the support column 322 to the base plate 10. Then connect the lower ends of the first support plate 51 and the second support plate 52 to the base plate 10. Note that the first support plate 51 should be connected to the left side of the support column 322, and the second support plate 52 should be connected to the right side of the support column 322. Next, place the load 31 on the two support rods 321, and then place a support block 324 on each support rod 321, with the support block 324 on the right side of the load 31. Then install the limiting column 3211 on the left and right sides of the support rod 321. Then connect the support plate 323 to the upper end of the support column 322. Then fix the two support blocks 324 to the support plate 323. Then install the measuring target ball into the mounting hole 22. Then connect the adjustment mechanism to the measuring target ball. Finally, screw the drive module 40 to the base plate 10. At this point, the installation of the precision calibration device 100 for the proton radiotherapy patient positioning system is complete.

[0069] When using the precision calibration device 100 of the proton radiotherapy patient positioning system, the measuring target ball first measures the coordinate data of the reference point on the target ball support 21. Then, a counterweight is installed on the load support 32. Under the gravity of the counterweight, the counterweight will cause the left end of the target ball support 21 to deform downwards. At this time, the measuring target ball measures the coordinate data of the reference point of the target ball support 21 again. When the measuring target ball measures the coordinate data of the reference point of the target ball support 21 again, the adjustment mechanism can adjust the height of the measuring target ball to measure the coordinate data of the reference point. Then, the two coordinate data are compared to obtain the displacement of the target ball support 21 under the condition of the counterweight of that weight. Then, the number of counterweights is adjusted to obtain the deformation displacement data of the target ball support 21 under different counterweights, thereby simulating the displacement data of the positioning system caused by patients of different weights lying on the positioning system. In addition, when the drive module 40 drives the base plate 10 to rotate, the target ball support 21 and the base plate 10 rotate together. At the same time, the clamping mechanism clamps the counterweight to prevent the load 31 from moving. This allows the deformation displacement of the counterweight on the target ball support 21 at different angles to be simulated. Then, the coordinate data of the target ball and the reference point are measured again to obtain the deformation displacement data of the target ball support 21 at different angles.

[0070] The precision calibration device 100 of the proton radiotherapy patient positioning system of the present invention is provided with a load application assembly 30 and a drive module 40. It can simulate the displacement data of the target ball support 21 caused by different loads. The measured deformation displacement data is used as the measurement sample points of the precision calibration device 100 of the proton radiotherapy patient positioning system, which can accurately treat the lesion site of the patient and thus improve the treatment effect.

[0071] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0072] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0073] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0074] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0075] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A precision calibration device for a proton radiotherapy patient positioning system, characterized in that, include: Base plate; A measuring target ball assembly is disposed on the base plate. The measuring target ball assembly includes a target ball support and a target ball mounting part on the target ball support. The target ball mounting part is configured to mount a measuring target ball for measuring the reference point of the patient positioning system. A load application assembly is mounted on the base plate. The load application assembly includes a load and a load support. The load is mounted on the load support, and the weight of the load is adjustable. A drive module, which is connected to the base plate, is used to drive the base plate to move. The load support includes a support rod and a support column. A through hole is formed on the load, and the load passes through the through hole onto the support rod. The support column is vertically arranged, with its lower end connected to the base plate and its upper end connected to the support rod. A connecting bracket extends vertically and is arc-shaped, surrounding the support column. The lower end of the connecting bracket is connected to the base plate, and the measuring target ball assembly is fixed to the upper end of the connecting bracket.

2. The precision calibration device for the proton radiotherapy patient positioning system according to claim 1, characterized in that, The support rod is formed as a circular tube; and / or, The number of support rods is multiple, and the multiple support rods are arranged in parallel and spaced apart. The load is provided with multiple through holes, and each of the multiple through holes corresponds to one of the multiple support rods.

3. The precision calibration device for the proton radiotherapy patient positioning system according to claim 1, characterized in that, The support rod is provided with limiting posts extending outward along the radial direction of the support rod. The limiting posts are located at both ends of the support rod in the length direction, and the load is located between the limiting posts at both ends of the support rod.

4. The precision calibration device for the proton radiotherapy patient positioning system according to claim 1, characterized in that, The load-bearing support also includes: A support plate, which is horizontally arranged and fixed to the upper end of the support column; A support block is fixed to the upper side of the support plate, and the support rod is connected to the support block.

5. The precision calibration device for the proton radiotherapy patient positioning system according to claim 4, characterized in that, The support block has a through hole extending horizontally through it, and the support rod passes through the through hole and is fixed to the support block; or, The support column is a hollow cylindrical shape.

6. The accuracy calibration device for the proton radiotherapy patient positioning system according to any one of claims 1-5, characterized in that, The load includes multiple counterweights, and the number of counterweights is adjustable.

7. The accuracy calibration device for a proton radiotherapy patient positioning system according to any one of claims 1-5, characterized in that, The load application assembly further includes a clamping mechanism disposed on the load and / or the load support, the clamping mechanism being configured to secure the load to the load support.

8. The precision calibration device for the proton radiotherapy patient positioning system according to claim 1, characterized in that, The connecting bracket includes a first support plate and a second support plate arranged at a distance in the horizontal direction, both of which are connected between the measuring target ball assembly and the base plate.

9. The precision calibration device for the proton radiotherapy patient positioning system according to claim 1, characterized in that, The target ball assembly further includes: a plurality of measuring target balls, the measuring target ball assembly having a plurality of mounting holes, the plurality of measuring target balls corresponding one-to-one with the plurality of mounting holes and located at the corresponding mounting hole positions.

10. The precision calibration device for the proton radiotherapy patient positioning system according to claim 9, characterized in that, Also includes: An adjustment structure is provided, which is connected to the measuring target ball and is used to adjust the height of the measuring target ball in the vertical direction.

11. The precision calibration device for the proton radiotherapy patient positioning system according to claim 1, characterized in that, The drive module is a pneumatic quick-change module.

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