Treatment head and radiotherapy equipment

Abstract

The utility model provides a treatment head and radiotherapy equipment, and the treatment head comprises a flattening device assembly which comprises a flattening device and an extension structure, and the flattening device is installed on the extension structure; a collimator is installed in the treatment head installation base, an installation opening is formed in the outer portion of the treatment head installation base, a moving channel used for containing the flattening device assembly is arranged between the installation opening and a beam outlet hole of the collimator, and the extending structure is in sliding connection with the moving channel; the elastic positioning pin is located on the inner wall face of the moving channel, and a positioning hole matched with the elastic positioning pin is formed in the extending structure so that the extending structure can be limited. The treatment head provided by the utility model solves the technical problem that in the prior art, the disassembly process of an existing flattening device is complex and tedious.

Description

Technical Field

[0001] This utility model relates to the field of radiotherapy equipment technology, specifically to a treatment head and radiotherapy equipment. Background Technology

[0002] The principle of a medical linear accelerator based on X-ray radiotherapy is as follows: After receiving a high-voltage pulse, the electron gun emits pulsed electrons. These pulsed electrons are accelerated in the microwave electric field of the accelerating tube and then strike a tungsten target, generating an X-ray beam. The treatment head is located below the accelerating tube. The X-ray beam emitted from the accelerating tube needs to pass through the treatment head to obtain a radiation beam that meets certain requirements for uniformity and symmetry, and the radiation beam is confined to a certain area to obtain a radiation field of the required clinical size.

[0003] A collimator is installed inside the treatment head. X-rays undergo initial beam shaping to the size of the radiation field after passing through the primary collimator. After passing through the primary collimator, a homogenizer is usually installed. The homogenizer is a key component of radiotherapy equipment; it is used to adjust and homogenize the intensity of the radiation beam, ensuring that the tumor receives an accurate dose of radiation during radiotherapy while minimizing damage to surrounding healthy tissues. An ionization chamber for monitoring the X-ray dose rate is located below the homogenizer. To reduce the size of the treatment head, current radiotherapy equipment features a relatively compact internal structure.

[0004] Over time and with frequent use, the homogenizer may lose its ability to modulate the radiation beam due to wear, contamination, or physical damage. Current technologies extend the homogenizer's lifespan by regularly maintaining and monitoring its performance, ensuring a consistent dose distribution during radiotherapy and reducing replacement costs. However, existing homogenizers are located inside the treatment head, making disassembly complex and cumbersome.

[0005] Therefore, existing technologies need further development. Utility Model Content

[0006] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and provide a treatment head and radiotherapy equipment to solve the technical problem that the disassembly process of the existing homogenizer is relatively complicated and cumbersome in the related technology.

[0007] To achieve the above technical objectives, the present invention adopts the following technical solution: A treatment head is provided, comprising: a homogenizer assembly, the homogenizer assembly including a homogenizer and an extension structure, the homogenizer being mounted on the extension structure; a treatment head mounting base, a collimator being mounted inside the treatment head mounting base, an installation opening being provided on the outside of the treatment head mounting base, a moving channel for accommodating the homogenizer assembly being provided between the installation opening and the beam outlet of the collimator, the extension structure being slidably connected to the moving channel; and an elastic positioning pin, the elastic positioning pin being located on the inner wall surface of the moving channel, the extension structure having a positioning hole matching the elastic positioning pin to limit the movement of the extension structure.

[0008] Furthermore, the extension structure includes an extension plate, one end of which is equipped with a leveling device, and the other end of which is provided with a pulling part.

[0009] Furthermore, the extension structure includes a leveling device mounting base, which is detachably connected to the end of the extension plate, and a leveling device is mounted on the leveling device mounting base.

[0010] Furthermore, the equalizer mounting base includes a mounting platform for supporting the equalizer; the extension structure includes a pressure cap detachably connected to the mounting platform, the pressure cap covering the equalizer, and the pressure cap having a clearance hole corresponding to the beam outlet hole for at least a portion of the equalizer to pass through.

[0011] Furthermore, the installation platform is provided with: a first positioning groove, in which a leveling device is embedded; and a second positioning groove, in which a pressure cap is embedded.

[0012] Furthermore, the equalizer mounting base includes a connecting part, one end of which is connected to the mounting platform, and the other end of which is provided with a connecting block. The connecting block protrudes in a direction away from the mounting platform, and the connecting block is detachably connected to a connecting groove located on the extension plate.

[0013] Furthermore, a snap-fit ​​block is protruding from the side wall of the extension structure, and a snap-fit ​​groove corresponding to the snap-fit ​​block is provided on the side wall of the moving channel, with the snap-fit ​​block and the snap-fit ​​groove slidably connected.

[0014] Furthermore, a sensor is installed at the mounting opening, and the sensor is set in correspondence with the pulling part.

[0015] A radiotherapy device, comprising the aforementioned treatment head.

[0016] Beneficial effects:

[0017] 1. In the treatment head of this embodiment, when the equalizer needs to be replaced, the extension structure enters the moving channel through the installation opening. The extension structure slides relative to the moving channel, allowing the equalizer to move from outside the treatment head mounting base to the outlet hole, thereby completing the unloading of the equalizer. By setting an elastic positioning pin, the position of the equalizer in the treatment head mounting base is kept relatively fixed, thus solving the technical problem that the disassembly process of the existing equalizer in the related art is relatively complicated and cumbersome.

[0018] 2. Set up an installation platform to support the homogenizer. Fix the homogenizer to the installation platform by setting a pressure cap. Set up clearance holes to avoid the homogenizer and prevent unnecessary X-ray energy loss during beam exit, so as to avoid affecting the homogenization of X-rays. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the treatment head mounting base used in an embodiment of the present invention;

[0020] Figure 2 This is a cross-sectional view of the treatment head mounting base of the treatment head used in this embodiment of the utility model;

[0021] Figure 3 yes Figure 2 An enlarged view of point A in the image;

[0022] Figure 4 This is a schematic diagram of the equalizer assembly of the treatment head used in this embodiment of the utility model;

[0023] Figure 5 This is a second-view structural schematic diagram of the equalizer assembly of the treatment head used in this embodiment of the utility model;

[0024] Figure 6 This is a structural schematic diagram of the equalizer assembly of the treatment head used in an embodiment of this utility model from a third perspective.

[0025] The above figures include the following reference numerals:

[0026] 1. Equalizer; 2. Extension structure; 21. Extension plate; 22. Pulling part; 23. Equalizer mounting base; 231. Mounting platform; 232. First positioning groove; 233. Second positioning groove; 234. Connecting part; 235. Connecting block; 236. Positioning block; 24. Pressure cap; 241. Clearance hole; 25. Positioning hole; 26. Snap-fit ​​block; 3. Treatment head mounting base; 31. Mounting opening; 32. Moving channel; 33. Elastic positioning pin; 34. Sensor; 35. Snap-fit ​​groove; 4. Collimator; 41. Beam outlet; 5. Shielding component. Detailed Implementation

[0027] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0028] According to an embodiment of this utility model, a treatment head and a radiotherapy device are provided. Please refer to [link / reference needed]. Figures 1 to 6 The device includes: a leveling assembly, which includes a leveling device 1 and an extension structure 2, with the leveling device 1 mounted on the extension structure 2; a treatment head mounting base 3, which has a collimator 4 installed inside it, and an installation opening 31 on the outside of the treatment head mounting base 3. A moving channel 32 for accommodating the leveling assembly is provided between the installation opening 31 and the beam outlet 41 of the collimator 4, and the extension structure 2 is slidably connected to the moving channel 32; and an elastic positioning pin 33, which is located on the inner wall of the moving channel 32. The extension structure 2 has a positioning hole 25 that matches the elastic positioning pin 33 to limit the movement of the extension structure 2.

[0029] It should be noted that an ionization chamber is often installed below the homogenizer 1 in radiotherapy equipment, and the homogenizer 1 is located inside the treatment head mounting base 3. The process of disassembling the homogenizer 1 is relatively complicated and cumbersome.

[0030] In some embodiments, an elastic positioning pin 33 is installed on the inner wall of the moving channel 32, and a positioning hole 25 matching the elastic positioning pin 33 is provided on the extension structure 2 to limit the extension structure 2. Specifically, by providing the elastic positioning pin 33, the elastic positioning pin 33 includes an elastic element disposed inside and a positioning ball abutting against the elastic element. When the equalizer assembly is located in the moving channel 32, the positioning ball is connected to the positioning hole 25, and the extension structure 2 remains relatively fixed to the moving channel 32. When the user pulls the pulling part 22, under the action of external force, the positioning ball moves away from the extension structure 2. At this time, the positioning ball disengages from the positioning hole 25, the elastic positioning pin 33 is disconnected from the positioning hole 25, and the extension structure 2 can slide relative to the moving channel 32.

[0031] Using the above-described equalizer assembly structure, when the equalizer 1 needs to be replaced, the extension structure 2 enters the moving channel 32 through the mounting opening 31. By sliding the extension structure 2 relative to the moving channel 32, the equalizer 1 can be moved from outside the treatment head mounting base 3 to the outlet hole 41, thereby completing the unloading of the equalizer 1. By setting the elastic positioning pin 33, the position of the equalizer 1 in the treatment head mounting base 3 is kept relatively fixed, thus solving the technical problem that the disassembly process of the existing equalizer in related technologies is relatively complicated and cumbersome.

[0032] In the treatment head of this embodiment, see Figure 2 or Figure 4 The extension structure 2 includes an extension plate 21, one end of which is equipped with a leveler 1, and the other end of which is provided with a pulling part 22. By pulling the pulling part 22, the extension plate 21 can be pulled to slide relative to the moving channel 32. The extension plate 21 has a certain length, which makes it convenient for the user to operate the pulling part 22 outside the treatment head mounting seat 3.

[0033] Preferably, the extension plate 21 is arranged radially along the treatment head mounting base 3, and the length of the extension plate 21 matches the radius of the treatment head mounting base 3. The pulling part 22 is located at the mounting opening 31, thereby facilitating the operation of the pulling part 22.

[0034] It is understandable that the treatment head mounting base 3 contains multiple parts such as a shield 5 and a collimator 4. Depending on the location of the moving channel 32, the shield 5 and the collimator 4 are also provided with moving channels 32.

[0035] In some embodiments, the shield 5 is an annular part surrounding the collimator 4 and the equalizer 1. Therefore, the shield 5 must have a moving channel 32 so that the extension structure 2 can pass smoothly through the shield 5 to reach the beam outlet 41.

[0036] In the treatment head of this embodiment, see Figure 3 The extension structure 2 includes a leveling device mounting base 23, which is detachably connected to the end of the extension plate 21. A leveling device 1 is mounted on the leveling device mounting base 23. With the above configuration, the leveling device mounting base 23 is used to mount the leveling device 1. The leveling device mounting base 23 is detachably connected to the end of the extension plate 21, thereby facilitating the replacement of the leveling device mounting base 23.

[0037] In the treatment head of this embodiment, see Figure 1The homogenizer mounting base 23 includes a mounting platform 231 for supporting the homogenizer 1. The extension structure 2 includes a pressure cap 24 detachably connected to the mounting platform 231, which covers the homogenizer 1. The pressure cap 24 has a clearance hole 241 corresponding to the beam exit hole 41, allowing at least a portion of the homogenizer 1 to pass through. The mounting platform 231 supports the homogenizer 1, and the pressure cap 24 fixes the homogenizer 1 to the mounting platform 231, thus maintaining a relatively fixed position for the homogenizer 1. The clearance hole 241 provides clearance for the homogenizer 1, preventing excessive X-ray energy loss during beam exit and avoiding affecting the homogenization of the X-rays.

[0038] It should be noted that the diameter of the clearance hole 241 is adapted to the diameter of the beam outlet hole 41, and can be equal to or greater than the diameter of the beam outlet hole 41.

[0039] In some embodiments, the portion of the gland 24 that connects to the homogenizer mounting base 23 is located outside the clearance hole 241 to prevent the connecting bolts from affecting the X-ray homogenization.

[0040] In the treatment head of this embodiment, see Figure 3 The installation platform 231 has: a first positioning groove 232, in which a homogenizer 1 is embedded; and a second positioning groove 233, in which a pressure cap 24 is embedded. The homogenizer 1 is positioned by the first positioning groove 232, and the pressure cap 24 is positioned by the second positioning groove 233, thereby improving the positioning accuracy of the homogenizer 1 and the pressure cap 24 and ensuring that the tumor receives an accurate dose of radiation during radiotherapy.

[0041] In some embodiments, the equalizer 1 is a composite equalizer with copper as the upper layer and tungsten as the lower layer. The bottom surface of the corresponding first positioning groove 232 is a complete plane. The shape of the first positioning groove 232 can also be adapted to the shape of the equalizer 1.

[0042] In the treatment head of this embodiment, see Figure 3 The homogenizer mounting base 23 includes a connecting portion 234. One end of the connecting portion 234 is connected to the mounting platform 231, and the other end of the connecting portion 234 is provided with a connecting block 235. The connecting block 235 protrudes in a direction away from the mounting platform 231, and is detachably connected to a connecting groove located on the extension plate 21. By providing the connecting block 235 and the connecting groove, the homogenizer mounting base 23 and the extension plate 21 can be precisely engaged, while keeping the connection area between the homogenizer mounting base 23 and the extension plate 21 away from the homogenizer 1, thereby preventing excessive X-ray energy loss during beam output and avoiding affecting the homogenization of X-rays.

[0043] In some embodiments, the connecting block 235 is connected to the extension plate 21 by screws.

[0044] In some embodiments, a positioning block 236 protrudes from the connecting block 235, and a positioning groove corresponding to the positioning block 236 is provided in the connecting groove, thereby positioning the leveler mounting base 23 and ensuring the connection accuracy between the leveler mounting base 23 and the extension plate 21.

[0045] Preferably, the upper end face of the connecting block 235 is flush with or slightly lower than the upper end face of the extension plate 21, and the lower end face of the mounting platform 231 is flush with or slightly lower than the lower end face of the extension plate 21, so that the equalizer mounting base 23 forms a "Z" shaped structure, thereby maximizing the structural strength of the equalizer mounting base 23.

[0046] In some embodiments, the thickness of the connecting block 235 is greater than the thickness of the mounting platform 231. On the one hand, this can ensure the connection strength between the connecting block 235 and the extension plate 21. On the other hand, making the mounting platform 231 thinner can avoid unnecessary X-ray energy loss. For example, the thickness of the connecting block 235 is designed to be 5mm, and the thickness of the mounting platform 231 is designed to be 1mm.

[0047] In the treatment head of this embodiment, see Figure 6 A latching block 26 protrudes from the side wall of the extension structure 2, and a latching groove 35 corresponding to the latching block 26 is provided on the side wall of the moving channel 32. The latching block 26 and the latching groove 35 are slidably connected. Through the above arrangement, the latching groove 35 forms a sliding groove structure inside the moving channel 32, and the latching block 26 acts as a slide rail, providing positioning and guidance for the extension structure 2 when it slides within the moving channel 32.

[0048] It should be noted that the snap-fit ​​blocks 26 are continuously arranged on the periphery of the extension structure 2, including the periphery of the extension plate 21, the equalizer mounting base 23 and the pressure cover 24.

[0049] In the treatment head of this embodiment, see Figure 1 A sensor 34 is installed at the mounting opening 31, and the sensor 34 is correspondingly positioned to correspond to the pull part 22. By setting the sensor 34, the installation position of the equalizer assembly can be identified and located.

[0050] It is understood that sensor 34 includes, but is not limited to, proximity switches, photoelectric sensors, etc.

[0051] In some embodiments, the sensor 34 is a proximity switch, and the pull part 22 is correspondingly made of iron. The sensor 34 can detect whether the pull part 22 is reset (i.e., the pull part 22 is located at the mounting opening 31, at which time the equalizer 1 and the collimator 4 are aligned). When the pull part 22 is in the reset state, the sensor 34 feeds back the reset state to the radiotherapy equipment, and the radiotherapy equipment can start radiotherapy.

[0052] In some embodiments, the pulling part 22 is made of iron, and a positioning hole 25 is provided on the bottom surface of the pulling part 22, with the elastic positioning pin 33 corresponding to the positioning hole 25.

[0053] In some embodiments, the thickness of the extension plate 21 is approximately 18-22 mm, and the thickness of the equalizer mounting base 23 is 16 mm-20 mm. The above settings ensure the structural strength of the extension plate 21 and the equalizer mounting base 23.

[0054] In some embodiments, the pressure cap 24 and the equalizer mounting base 23 are both made of aluminum alloy with good X-ray transmittance, and the extension plate 21 is made of tungsten alloy material, which has a good shielding effect against X-rays.

[0055] In the radiotherapy device of this embodiment, the radiotherapy device includes the treatment head described above.

[0056] In the radiotherapy device of this embodiment, by adopting the above-described homogenizer assembly structure, when the homogenizer 1 needs to be replaced, the sliding extension structure 2 slides relative to the moving channel 32. The extension structure 2 enters the moving channel 32 through the mounting opening 31, which allows the homogenizer 1 to be moved from outside the treatment head mounting seat 3 to the beam exit hole 41, thereby completing the unloading of the homogenizer 1 and solving the technical problem that the existing homogenizer disassembly process in the related art is relatively complicated and cumbersome.

[0057] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0058] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments, and will not be repeated here.

[0059] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0060] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0061] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A treatment head, characterized in that, include: A leveling assembly, the leveling assembly including a leveling device (1) and an extension structure (2), wherein the leveling device (1) is mounted on the extension structure (2). Treatment head mounting base (3), a collimator (4) is installed inside the treatment head mounting base (3), an installation opening (31) is opened on the outside of the treatment head mounting base (3), a moving channel (32) for accommodating the equalizer assembly is provided between the installation opening (31) and the beam outlet (41) of the collimator (4), and the extension structure (2) is slidably connected to the moving channel (32); An elastic positioning pin (33) is located on the inner wall of the moving channel (32). The extension structure (2) is provided with a positioning hole (25) that matches the elastic positioning pin (33) to limit the extension structure (2).

2. The treatment head according to claim 1, characterized in that, The extension structure (2) includes an extension plate (21), one end of which is equipped with the equalizer (1), and the other end of which is provided with a pulling part (22).

3. The treatment head according to claim 2, characterized in that, The extension structure (2) includes a leveler mounting base (23), which is detachably connected to the end of the extension plate (21), and the leveler (1) is mounted on the leveler mounting base (23).

4. The treatment head according to claim 3, characterized in that, The equalizer mounting base (23) includes a mounting platform (231) for supporting the equalizer (1). The extension structure (2) includes a pressure cap (24) detachably connected to the mounting platform (231), the pressure cap (24) covering the equalizer (1), and the pressure cap (24) having a clearance hole (241) corresponding to the beam outlet (41), the clearance hole (241) being for at least part of the equalizer (1) to pass through.

5. The treatment head according to claim 4, characterized in that, The installation platform (231) has the following openings: The first positioning groove (232) is inlaid with the equalizer (1); The second positioning groove (233) is inlaid with the pressure cap (24).

6. The treatment head according to claim 4, characterized in that, The equalizer mounting base (23) includes a connecting part (234), one end of which is connected to the mounting platform (231), and the other end of which is provided with a connecting block (235). The connecting block (235) protrudes in a direction away from the mounting platform (231), and the connecting block (235) is detachably connected to a connecting groove located on the extension plate (21).

7. The treatment head according to claim 1, characterized in that, The extension structure (2) has a protruding snap-fit ​​block (26) on its side wall, and the moving channel (32) has a snap-fit ​​groove (35) corresponding to the snap-fit ​​block (26) on its side wall. The snap-fit ​​block (26) and the snap-fit ​​groove (35) are slidably connected.

8. The treatment head according to claim 2, characterized in that, A sensor (34) is installed at the mounting opening (31), and the sensor (34) is correspondingly arranged with the pulling part (22).

9. A radiotherapy device, characterized in that, The radiotherapy device includes a treatment head as described in any one of claims 1 to 8.

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