Body position fixing device for breast cancer proton therapy

Abstract

The utility model relates to the technical field of medical treatment, in particular to a breast cancer proton treatment body position fixing device which is detachably installed on a treatment bed and comprises a body bracket used for supporting the body of a patient and arranged on the treatment bed, and a headrest is installed on the body bracket; the angle adjusting mechanism is mounted on the treatment bed, connected with the body bracket and used for adjusting the placement angle of the body bracket relative to the treatment bed; the two arm brackets are symmetrically arranged on the two sides of the body bracket, the arm brackets are connected with multi-direction adjusting mechanisms installed at the side ends of the body bracket, and the multi-direction adjusting mechanisms are used for adjusting the vertical position and the horizontal position of the arm brackets. The arranged multi-direction adjusting mechanism can adjust the position of the arm bracket in the vertical direction and the horizontal direction, the distance between the arm of a patient and a mammary gland treatment area is adaptively increased, the path of a proton beam penetrating through the arm is remarkably reduced, and therefore the radiation dose received by the arm is reduced to the maximum extent.

Description

Technical Field

[0001] This utility model relates to the field of medical technology, specifically a positioning fixation device for proton therapy of breast cancer. Background Technology

[0002] Breast cancer is a major health threat to women worldwide, ranking second only to lung cancer among malignant tumors. Comprehensive treatment strategies for breast cancer include surgery, neoadjuvant therapy, targeted therapy, immunotherapy, chemotherapy, and radiotherapy. Among these, radiotherapy plays a crucial role and its importance is constantly increasing. Radiotherapy uses high-energy X-rays, protons, or other particles to kill cancer cells, primarily aiming to reduce the risk of postoperative recurrence, improve patient survival rates, and alleviate symptoms of metastatic breast cancer.

[0003] Despite significant advancements in modern radiation therapy techniques that have greatly reduced the impact on surrounding healthy tissues, some potential risks remain unavoidable. For example, in patients with left-sided breast cancer, radiation may increase the long-term risk of heart disease; furthermore, radiation therapy may cause lung inflammation or fibrosis, affecting respiratory function. As survival outcomes for breast cancer patients improve, the need to further reduce side effects becomes crucial.

[0004] Proton therapy, as an advanced radiotherapy technique, exhibits significant advantages over traditional radiotherapy. The Bragg peak characteristic of protons concentrates their energy primarily at the end of their range, allowing for precise coverage of the entire tumor target area. By adjusting the energy of the proton beam, the depth and intensity of the radiation dose can be precisely controlled. Compared to traditional X-ray radiotherapy, proton therapy delivers a significantly lower radiation dose to surrounding healthy tissues, effectively reducing potential radiotoxic side effects. Studies have shown that in breast cancer patients, proton therapy can significantly reduce the radiation dose to the heart and lungs, thereby improving treatment safety and patients' quality of life. In summary, proton therapy ensures full dose irradiation of the target area while effectively reducing the incidence of adverse reactions to radiotherapy and effectively protecting surrounding normal tissues, including the heart and lungs. This innovative technology holds promise for further reducing the long-term incidence of adverse reactions to breast cancer radiotherapy, improving patients' quality of life, and providing breast cancer patients with safer and more precise treatment options.

[0005] In proton therapy for breast cancer, patients typically lie supine with their arms raised overhead, which facilitates the design and implementation of the treatment plan. However, some breast cancer patients who are unable to raise their arms can only place them flat beside their waist, leading to:

[0006] 1. Increased risk of radiation damage: Because the arm is close to the breast cancer tumor area, the proton beam may directly irradiate the arm, thereby increasing the risk of radiation damage to the arm.

[0007] 2. Increased Uncertainty in Dose Distribution: A key advantage of proton therapy is its precise dose distribution, primarily due to the Bragg peak effect. However, this precision makes proton therapy extremely sensitive to any changes in the path of the beam. Even minute variations in arm position can cause the proton beam to traverse tissue density, reach the tumor depth, and deviate from the intended Bragg peak position. These factors can lead to discrepancies between the actual dose distribution and the dose distribution designed into the treatment planning system, thus affecting the accuracy of the treatment. Utility Model Content

[0008] The purpose of this invention is to provide a positioning fixation device for proton therapy of breast cancer, so as to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] A breast cancer proton therapy positioning device, detachably mounted on a treatment bed, includes:

[0011] A body support frame, used to support the patient's body, is set on the treatment bed, and a headrest is installed on the body support frame;

[0012] An angle adjustment mechanism is installed on the treatment bed and connected to the body bracket, and is used to adjust the placement angle of the body bracket relative to the treatment bed;

[0013] It also includes two arm brackets symmetrically arranged on both sides of the body bracket. The arm brackets are connected to a multi-directional adjustment mechanism installed on the side of the body bracket. The multi-directional adjustment mechanism is used to adjust the vertical and horizontal positions of the arm brackets.

[0014] The breast cancer proton therapy positioning device described above: the arm support includes a receiving member and two extensions formed on the receiving member, and a hand grip is provided between the two extensions. The hand grip can move relative to the length direction of the receiving member and reach a locked state at a desired position.

[0015] The breast cancer proton therapy positioning device described above: a strip-shaped groove is provided on the extension along the length direction of the receiving member; sliding blocks are rotatably or fixed at both ends of the hand grip; the sliding blocks slide in the strip-shaped groove; and the sliding blocks can be pressed and fixed to the extension by a first threaded locking member installed on one of the sliding blocks.

[0016] The breast cancer proton therapy positioning device described above: a first scale is also provided on the extension along its length direction, and a first pointer is formed on the sliding block.

[0017] The breast cancer proton therapy positioning device described above includes the following multi-directional adjustment mechanism:

[0018] At least two first slide rails fixed on the body bracket and a first slide sleeve slidably mounted on the first slide rails and capable of being fixed by a second threaded locking member;

[0019] A transverse support is fixed perpendicularly to the first sliding sleeve, and a receiving member is slidably connected to the transverse support, wherein the length direction of the receiving member is perpendicular to the length direction of the transverse support.

[0020] The breast cancer proton therapy positioning device described above includes a second slide rail fixed on the transverse support and a second sliding sleeve slidably mounted on the second slide rail and fixed to the receiving member. The second sliding sleeve is connected to a threaded adjusting member mounted on the transverse support.

[0021] The breast cancer proton therapy positioning device described above: the body support includes a movable support and a fixed support that are rotatably connected to each other, the fixed support is detachably connected to the treatment bed, and the movable support is connected to the angle adjustment mechanism.

[0022] The breast cancer proton therapy positioning device described above includes an angle adjustment mechanism comprising:

[0023] Mounting plate detachably connected to the treatment bed;

[0024] A lead screw is rotatably mounted on the mounting plate and has a handwheel fixed at one end. A threaded sleeve that is slidably connected to the mounting plate is threaded onto the lead screw.

[0025] The connecting frame is hinged at one end to the movable bracket and at the other end to the fixed bracket.

[0026] The breast cancer proton therapy positioning device described above: a second scale is fixed on the mounting plate at a position parallel to the length direction of the lead screw, and a second pointer is installed on the threaded sleeve.

[0027] The breast cancer proton therapy positioning device described above has at least two first limiting holes on the side of the fixing bracket facing the treatment bed, and at least two second limiting holes on the mounting plate. Both the first and second limiting holes are engaged with a retaining strip that can be detachably mounted on the treatment bed.

[0028] Compared with the prior art, the beneficial effects of this utility model are:

[0029] The angle adjustment mechanism and the multi-directional adjustment mechanism are used to adjust the body support and the arm support respectively. While meeting the needs of patients with different body shapes, it can ensure that patients maintain a better treatment posture. At the same time, the multi-directional adjustment mechanism can adjust the position of the arm support in the vertical and horizontal directions, adaptively increasing the distance between the patient's arm and the breast treatment area, significantly reducing the path of the proton beam through the arm, thereby minimizing the radiation dose received by the arm.

[0030] Optimizing treatment postures while ensuring patient comfort not only ensures the accuracy and stability of the patient's posture during treatment, but also significantly improves the robustness of proton therapy plans and patient comfort. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of a positioning device for proton therapy of breast cancer.

[0032] Figure 2 A top view of a positioning device for proton therapy in breast cancer.

[0033] Figure 3 This is a schematic diagram of the body support frame separated from the treatment bed in a positioning device for proton therapy of breast cancer.

[0034] Figure 4 This is a schematic diagram showing the body support frame of the proton therapy positioning device for breast cancer separated from the treatment bed at another angle.

[0035] Figure 5 This is a schematic diagram showing the separated state of the body support and angle adjustment mechanism in a proton therapy positioning device for breast cancer.

[0036] Figure 6 This is a schematic diagram showing the connection between the arm support and the multi-directional adjustment mechanism in a positioning device for proton therapy of breast cancer.

[0037] Figure 7 This is a front view of the arm support and multi-directional adjustment mechanism in a positioning device for proton therapy of breast cancer.

[0038] Figure 8 for Figure 3 Enlarged view of the structure at point A in the middle.

[0039] In the picture:

[0040] 1. Treatment bed; 101. Mounting hole;

[0041] 2. Body bracket; 201. Movable bracket; 2011. Embedded groove; 202. Fixed bracket; 2021. First limiting hole;

[0042] 3. Headrest; 301. Adjustable parts;

[0043] 4. Arm support; 401. Receiving part; 402. Extension part; 4021. Strip groove; 4022. First scale; 403. Hand grip; 404. Sliding block; 405. First threaded locking part; 406. First pointer;

[0044] 5. Angle adjustment mechanism; 501. Mounting plate; 5011. Second limit hole; 502. Lead screw; 503. Connecting bracket; 504. Threaded sleeve; 505. Handwheel; 506. Second scale; 507. Second pointer;

[0045] 6. Multi-directional adjustment mechanism; 601. First slide rail; 602. First sliding sleeve; 603. Second threaded locking element; 604. Transverse support; 605. Second slide rail; 606. Second sliding sleeve; 607. Threaded adjustment element; 608. Third scale; 609. Third pointer;

[0046] 7. Clip; 701. Clip post; 702. Fixing pin. Detailed Implementation

[0047] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0048] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0049] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, and elements well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0050] Please see Figures 1-3 In this embodiment of the present invention, a breast cancer proton therapy positioning device is detachably installed on a treatment bed 1, comprising:

[0051] A body support 2 is used to support the patient's body and is set on the treatment bed 1. A head pillow 3 is installed on the body support 2. The body support 2 provides stable support for the patient's torso and ensures that the patient maintains the correct posture during treatment, so as to improve the accuracy and effect of treatment. The head pillow 3 is slidably installed on the body support 2 and is connected to the adjusting member 301 installed on the body support 2.

[0052] An angle adjustment mechanism 5 is installed on the treatment bed 1 and connected to the body support 2. It is used to adjust the placement angle of the body support 2 relative to the treatment bed 1. By adjusting the placement angle of the body support 2 through the angle adjustment mechanism 5, the patient's posture can be changed, so that the area to be treated by the patient is more effectively exposed to the radiation beam, significantly improving the coverage of the proton beam to the target area, thereby improving the treatment effect.

[0053] It also includes two arm supports 4 symmetrically arranged on both sides of the body support 2. The arm supports 4 are connected to a multi-directional adjustment mechanism 6 installed on the side of the body support 2. The multi-directional adjustment mechanism 6 is used to adjust the vertical and horizontal positions of the arm supports 4. The arm supports 4 are used to provide stable support for the patient's upper limbs, effectively reducing shoulder pressure and ensuring that the arms are kept in an ideal position. The multi-directional adjustment mechanism 6 can flexibly adjust the position of the arm supports 4 according to the patient's body characteristics. While ensuring patient comfort, it optimizes the treatment posture, not only ensuring the accuracy and stability of the patient's posture during treatment, but also significantly improving the robustness of the proton therapy plan and the patient's comfort.

[0054] In this embodiment, the angle adjustment mechanism 5 and the multi-directional adjustment mechanism 6 are used to adjust the body support 2 and the arm support 4, respectively. While meeting the needs of patients with different body shapes, it can ensure that patients maintain a better treatment posture. At the same time, the multi-directional adjustment mechanism 6 can adjust the position of the arm support 4 in the vertical and horizontal directions, adaptively increasing the distance between the patient's arm and the breast treatment area, significantly reducing the path of the proton beam through the arm, thereby minimizing the radiation dose received by the arm.

[0055] Further, please refer to Figure 6 and Figure 7 The arm support 4 includes a receiving member 401 and two extensions 402 formed on the receiving member 401. A hand grip 403 is provided between the two extensions 402. The hand grip 403 can move relative to the length direction of the receiving member 401 and reach a locked state at a desired position. An arc-shaped groove is formed on the receiving member 401 to improve the comfort of the patient's arm when it is placed in the receiving member 401. The length of the extensions 402 is less than the length of the receiving member 401 to ensure that the extensions 402 will not interfere with the bending of the patient's arm when the arm is bent.

[0056] For example, in one embodiment, the extension 402 is provided with a strip groove 4021 along the length direction of the receiving member 401, and the two ends of the handle 403 are rotatably or fixedly provided with sliding blocks 404. The sliding blocks 404 slide in the strip groove 4021, and can be pressed and fixed to the extension 402 by a first threaded locking member 405 installed on one of the sliding blocks 404.

[0057] The first threaded locking member 405 includes a threaded rod passing through the sliding block 404 and a rotating wheel fixed to the threaded rod. The threaded rod is threadedly connected to the sliding block 404. When the rotating wheel is rotated, the threaded rod can be rotated, thereby pressing and fixing the end of the threaded rod with the end of the extension member 402 to achieve position restriction of the hand grip 403 relative to the extension member 402.

[0058] The 403 hand grip provides a stable grip point for the patient's hands, which not only significantly enhances the patient's overall stability during treatment but also greatly improves comfort. By optimizing hand posture and reducing unnecessary muscle tension, the patient can better maintain a relaxed state. More importantly, this carefully designed stabilization mechanism significantly improves the robustness of proton therapy planning, ensuring the consistency and repeatability of the patient's posture during treatment, thereby enhancing the accuracy and effectiveness of the treatment.

[0059] Preferably, the extension 402 is further provided with a first scale 4022 along its length direction, and the sliding block 404 is provided with a first pointer 406. When the sliding block 404 slides relative to the extension 402, the first pointer 406 moves accordingly. The first pointer 406 cooperates with the first scale 4022 to achieve precise control of the hand grip position 403.

[0060] Please see Figure 3 and Figure 8 The multi-directional adjustment mechanism 6 includes:

[0061] At least two first slide rails 601 fixed on the body bracket 2 and a first slide sleeve 602 slidably mounted on the first slide rails 601 and capable of being fixed by the second threaded locking member 603;

[0062] A transverse support 604 is fixed perpendicularly to the first sliding sleeve 602, and a receiving member 401 is slidably connected to the transverse support 604, wherein the length direction of the receiving member 401 is perpendicular to the length direction of the transverse support 604.

[0063] The transverse support 604 is fixed with a second slide rail 605 and a second sliding sleeve 606 that is slidably installed on the second slide rail 605 and fixed to the receiving member 401. The second sliding sleeve 606 is connected to a threaded adjusting member 607 installed on the transverse support 604.

[0064] When the position of the receiving part 401 needs to be adjusted vertically, the second threaded locking part 603 is unlocked, and then the receiving part 401 is moved to achieve the position adjustment. Then the second threaded locking part 603 is locked to fix the first sliding sleeve 602 to the first slide rail 601. Preferably, a third pointer 609 is fixed to the side end of the first sliding sleeve 602, and a third scale 608 is provided on the body bracket 2. The third pointer 609 and the third scale 608 cooperate to achieve the accuracy of vertical adjustment of the receiving part 401. Of course, a corresponding scale and pointer can also be set when adjusting horizontally.

[0065] When horizontal adjustment is required, the second sliding sleeve 606 can be moved relative to the second slide rail 605 by means of the threaded adjustment component 607, thereby adjusting the horizontal position of the receiving component 401.

[0066] The above two adjustment methods can be used to flexibly adjust the position of the arm support 4 according to the patient's body shape characteristics, so as to optimize the treatment posture while ensuring the patient's comfort.

[0067] It should be noted that the second threaded locking member 603 has the same structure as the first threaded locking member 405, so this embodiment will not describe it again.

[0068] For example, in one embodiment, the threaded adjustment component 607 described above includes a threaded rod embedded in the transverse bracket 604 and a threaded sleeve threadedly connected to the threaded rod. The threaded sleeve is fixed to the second sliding sleeve 606 by a connecting block that passes through the transverse bracket 604. This threaded adjustment method is a conventional technical means, so it will not be described in detail in this embodiment.

[0069] The headrest 3 described above can also adopt the same structure as the threaded adjustment component 607, that is, the structure of the adjustment component 301 is the same as the structure of the threaded adjustment component 607.

[0070] Further, please refer to Figures 1-5 The body support 2 includes a movable support 201 and a fixed support 202 that are rotatably connected to each other. The fixed support 202 is detachably connected to the treatment bed 1. The movable support 201 is connected to the angle adjustment mechanism 5. The fixed support 202 cooperates with the movable support 201 to keep the rotation position unchanged when the movable support 201 is adjusted in angle.

[0071] For preferred options, please refer to [link / reference]. Figure 1 and Figure 2 In order to improve the range of motion of the arm support 4, the movable support 201 has embedded grooves 2011 on both sides, and the multi-directional adjustment mechanism 6 and the arm support 4 are located in the embedded grooves 2011.

[0072] The angle adjustment mechanism 5 includes a mounting plate 501 detachably connected to the treatment bed 1; a lead screw 502 rotatably mounted on the mounting plate 501 and with a handwheel 505 fixed at one end, and a threaded sleeve 504 threadedly connected to the mounting plate 501; and a connecting frame 503, one end of which is hinged to the movable bracket 201 and the other end of which is hinged to the fixed bracket 202.

[0073] By manually turning the handwheel 505, the lead screw 502 is driven to rotate. When the lead screw 502 rotates, the angle of the movable bracket 201 is adjusted through the action of the threaded sleeve 504 and the connecting bracket 503, thereby changing the patient's posture and making the area to be treated more effectively exposed to the radiation beam.

[0074] A second scale 506 is fixed on the mounting plate 501 at a position parallel to the length direction of the lead screw 502. A second pointer 507 is installed on the threaded sleeve 504. The second pointer 507 and the second scale 506 work together to achieve the precision of adjustment when medical staff make adjustments, thereby ensuring the subsequent treatment effect.

[0075] Furthermore, the fixed bracket 202 has at least two first limiting holes 2021 on the side facing the treatment bed 1, and the mounting plate 501 has at least two second limiting holes 5011. Both the first limiting holes 2021 and the second limiting holes 5011 are engaged with the retaining strip 7 detachably mounted on the treatment bed 1. The retaining strip 7 has retaining posts 701 that engage with the first limiting holes 2021 and the second limiting holes 5011. Both ends of the retaining strip 7 have fixing pins 702 that can be inserted into the mounting holes 101 formed on both sides of the treatment bed 1, thereby fixing the position of the retaining strip 7 and restricting the position of the fixed bracket 202. This ensures that the fixed bracket 202 and the movable bracket 201 will not shift laterally relative to the treatment bed 1 when the patient moves their body or when medical staff adjust the patient's limbs.

[0076] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0077] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A positioning device for proton therapy of breast cancer, detachably mounted on a treatment bed (1), comprising: A body support (2) is used to support the patient's body and is set on the treatment bed (1). A headrest (3) is installed on the body support (2). An angle adjustment mechanism (5) is installed on the treatment bed (1) and connected to the body bracket (2) for adjusting the placement angle of the body bracket (2) relative to the treatment bed (1); The feature is that it further includes two arm brackets (4) symmetrically arranged on both sides of the body bracket (2), the arm brackets (4) being connected to a multi-directional adjustment mechanism (6) installed on the side of the body bracket (2), the multi-directional adjustment mechanism (6) being used to adjust the vertical and horizontal positions of the arm brackets (4).

2. The breast cancer proton therapy positioning device according to claim 1, characterized in that, The arm support (4) includes a receiving member (401) and two extensions (402) formed on the receiving member (401). A hand grip (403) is provided between the two extensions (402). The hand grip (403) can move relative to the length direction of the receiving member (401) and reach a locked state at a desired position.

3. The breast cancer proton therapy positioning device according to claim 2, characterized in that, The extension (402) is provided with a strip groove (4021) along the length direction of the receiving member (401). The two ends of the hand grip (403) are rotatably or fixedly provided with sliding blocks (404). The sliding blocks (404) slide in the strip groove (4021) and can be pressed and fixed to the extension (402) by a first threaded locking member (405) installed on one of the sliding blocks (404).

4. The breast cancer proton therapy positioning device according to claim 3, characterized in that, The extension (402) is also provided with a first scale (4022) along its length direction, and the sliding block (404) is provided with a first pointer (406).

5. The breast cancer proton therapy positioning device according to claim 2, characterized in that, The multi-directional adjustment mechanism (6) includes: At least two first slide rails (601) fixed on the body bracket (2) and a first slide sleeve (602) slidably mounted on the first slide rails (601) and capable of being fixed by a second threaded locking member (603); A transverse support (604) is fixed perpendicularly to the first sliding sleeve (602), and a receiving member (401) is slidably connected to the transverse support (604). The length direction of the receiving member (401) is perpendicular to the length direction of the transverse support (604).

6. The breast cancer proton therapy positioning device according to claim 5, characterized in that, The transverse support (604) is fixed with a second slide rail (605) and a second slide sleeve (606) slidably mounted on the second slide rail (605) and fixed to the receiving member (401). The second slide sleeve (606) is connected to a threaded adjusting member (607) mounted on the transverse support (604).

7. The breast cancer proton therapy positioning device according to claim 1, characterized in that, The body support (2) includes a movable support (201) and a fixed support (202) that are rotatably connected to each other. The fixed support (202) is detachably connected to the treatment bed (1), and the movable support (201) is connected to the angle adjustment mechanism (5).

8. The breast cancer proton therapy positioning device according to claim 7, characterized in that, The angle adjustment mechanism (5) includes: Mounting plate (501) detachably connected to the treatment bed (1); A lead screw (502) is rotatably mounted on the mounting plate (501) and has a handwheel (505) fixed at one end. A threaded sleeve (504) that is slidably connected to the mounting plate (501) is threaded on the lead screw (502). The connecting bracket (503) is hinged at one end to the movable bracket (201) and at the other end to the fixed bracket (202).

9. A breast cancer proton therapy positioning device according to claim 8, characterized in that, A second scale (506) is fixed on the mounting plate (501) at a position parallel to the length direction of the lead screw (502), and a second pointer (507) is installed on the threaded sleeve (504).

10. A breast cancer proton therapy positioning device according to claim 8, characterized in that, The fixed bracket (202) has at least two first limiting holes (2021) on the side facing the treatment bed (1), and the mounting plate (501) has at least two second limiting holes (5011). The first limiting holes (2021) and the second limiting holes (5011) are both engaged with the locking strip (7) that is detachably mounted on the treatment bed (1).

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