Breast bracket for radiotherapy

Abstract

The invention discloses a mammary gland bracket for radiotherapy. The mammary gland bracket comprises a positioning plate, wherein a base groove is formed in the positioning plate; the arm support is installed on the positioning plate and used for supporting the arm of a radiotherapy patient. The arm support comprises a platform base installed in a base groove of the positioning plate; the support arm seat is mounted on the platform base and can rotate relative to the platform base; the arm support arm is mounted above the support arm seat, and one end of the arm support arm is rotationally connected with the support arm seat; the support arm bracket is arranged between the support arm seat and the arm support arm and is used for adjusting the height of the arm support arm relative to the positioning plate; and the arm support structure is arranged at the other end of the arm support supporting arm and is used for supporting the arm of the radiotherapy patient. According to the mammary gland bracket, the arm supports are small in occupied space, the height and angle adjusting range of the arm supports is large, the convenience degree is better, the arm supports can be suitable for patients of different body types and ages, the elbow wrapping degree of the patients is better, and the clinical comfort of the elbows of the patients and the body position consistency in the treatment period are improved when the mammary gland bracket is used.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a breast support for radiotherapy. Background Technology

[0002] With the continuous advancement of radiotherapy technology and the constant updating of concepts and treatment methods, the demand for precise irradiation of breast tumors is becoming increasingly strong. At the same time, with the rise of technologies such as FFF mode (non-uniform mode) and non-coplanar therapy, as well as the increasing clinical application of VMAT (intensity-modulated rotation therapy) machines and technologies, the radiotherapy methods for breast cancer are also undergoing continuous changes and innovations.

[0003] Compared to earlier localized breast cancer treatments using conventional radiotherapy and three-dimensional conformal radiotherapy, the location of the upper arm, forearm, elbow, wrist, and hand itself, which are farther from the target area, generally means that changes in the position of these structures have less impact on the radiation dose received by the tumor and other normal tissues. Furthermore, the technology itself is relatively old, and compared to coplanar VMAT therapy or non-coplanar intensity-modulated therapy, it has a larger redundancy in positional error. A safety margin of 5-20 mm is usually reserved during treatment. Therefore, although changes in the shape and position of these areas may cause changes in the patient's posture, these changes are generally clinically acceptable.

[0004] With continuous technological advancements, IMRT (Intensity Modulated Radiotherapy) is now widely used in clinical practice for breast cancer radiotherapy. Compared to earlier three-dimensional conformal radiotherapy, this technique offers more precise dose modulation, resulting in increased treatment efficacy and coverage. In particular, compared to earlier methods, this approach provides better protection for surrounding normal tissues while ensuring adequate tumor dose. However, this radiotherapy technique requires high patient positional repeatability throughout the entire radiotherapy cycle. Even minor changes in the position or shape of the tumor and surrounding normal tissues can alter the overall dosimetry. A change of just a few millimeters can cause the dosimetric values ​​of the tumor or surrounding normal tissues to exceed clinically acceptable safety limits, leading to underdose or overdose of the tumor, and potentially causing safety issues.

[0005] For VMAT and non-coplanar breast radiotherapy regimens, the requirements for patient positioning repeatability throughout the radiotherapy process are higher compared to IMRT. Especially for non-coplanar radiotherapy, there are positional requirements for all tissue structures along the radiation path. While changes in the position or shape of normal tissues located more than 5 cm away from the tumor in the coronal plane may have a relatively small impact on the tumor dose during coplanar radiotherapy, this may not be the case with non-coplanar irradiation. Changes in their position or shape can cause significant variations in the tumor dose, which are generally clinically unacceptable.

[0006] Currently, in clinical practice, during radiotherapy for breast tumors, a specialized breast support is typically used to immobilize the patient's arm, forearm, and elbow throughout the entire radiotherapy cycle to ensure consistent positioning throughout treatment. This minimizes changes in patient position during the treatment period. Compared to other radiotherapy positioning devices, the most prominent feature of the breast support is its added arm fixation function, highlighting the importance of maintaining consistent arm position.

[0007] For breast cancer patients with supraclavicular lymph node metastasis, the irradiation range during treatment is typically larger than that of local irradiation. The RTOG consensus specifies that the cephalic irradiation range should extend to the lower edge of the cricoid cartilage, and with target expansion, the actual range is even greater. Furthermore, breast radiotherapy often uses an elevated arm positioning method, meaning that the raised arm and the tumor in the supraclavicular region will appear on the same horizontal plane during treatment. This can lead to the arm appearing in the radiation path at certain angles, resulting in radiation attenuation. Therefore, maintaining consistent arm positioning and treatment consistency is essential for precise radiotherapy.

[0008] Currently, the commonly used method is as follows: Figure 29 The breast support shown positions the arm of a radiotherapy patient. It includes a positioning plate 100, a base 110 mounted on the positioning plate, and an arm support 120 on the base that supports the arm via a bracket. The height and angle of the bracket relative to the base are adjustable, and the arm support can rotate slightly relative to the bracket. However, this support has many shortcomings in fixing the patient's arm and maintaining their position, such as:

[0009] After the base of the above structure is installed on the positioning plate, a protrusion will be formed on the top of the positioning plate, which reduces the usable area between the two bases. During radiotherapy, the raised arm of a fatter patient will rub against or even squeeze the two bases, resulting in poor comfort and even the patient being scratched by the protrusion.

[0010] When adjusting the armrest height, the above-mentioned structure is limited by its structural design, such as a small height adjustment range and large intervals between different selectable heights. This means that the armrest can only offer a few fixed height values. Clinically, when positioning patients, it is impossible to adjust the height to the optimal value for each patient. Therefore, in subsequent treatment, patients with low cooperation or poor ability to maintain position are prone to problems with poor positioning consistency. Furthermore, the existing armrest arm has poor stability when the patient sways.

[0011] The aforementioned support structure has pads (i.e., white pads in the figure) to enhance support, which allows for a minimum height adjustment value. The armrest cannot be placed horizontally, thus failing to meet the patient's positional requirements in special circumstances.

[0012] The armrest described above is a single U-shaped plate. Although its cross-sectional curvature can support the patient's elbow and related areas, it does not provide good support for the elbow when the patient's arm is bent, and cannot achieve a close-fitting fixation of the elbow.

[0013] In addition, the use of some metal connectors such as screws and rotating platforms during the installation of the various components of the aforementioned arm support has resulted in a large number of metal artifacts or other forms of artifacts appearing on radiotherapy CT positioning images of the existing device. If these artifacts are not dealt with, they will affect the calculation of radiotherapy plans; if they are dealt with, the problem will be that the solution is costly and time-consuming. Summary of the Invention

[0014] The purpose of this invention is to solve the above-mentioned problems and provide a breast support for radiotherapy and its formation method. The arm support can reduce the overall space occupied, and the arm support has a large range of adjustment for height and angle, which is more convenient. The arm support can be used for patients of different body types and ages, and provides better support for the patient's elbow, thereby improving the clinical comfort of the patient's elbow and the consistency of body position during treatment.

[0015] To achieve the above-mentioned objectives of the present invention, the present invention provides a breast support for radiotherapy, comprising: a positioning plate having a base groove thereon; an arm support mounted on the positioning plate for supporting the arm of a radiotherapy patient, comprising: a platform base mounted in the base groove of the positioning plate; an arm support mounted on the platform base and rotatable relative to it; an arm support arm mounted above the arm support arm and rotatably connected to it at one end; an arm support bracket mounted between the arm support arm and the arm support arm for adjusting the height of the arm support arm relative to the positioning plate; and an arm support structure mounted at the other end of the arm support arm for supporting the arm of a radiotherapy patient.

[0016] Preferably, the upper surface of the platform base is flush with the upper surface of the positioning plate.

[0017] Preferably, the support arm is rotatably mounted on the platform base by a fixing bolt with external threads at the bottom and a smooth rod at the top.

[0018] Preferably, the outrigger bracket includes: detachably mounting one end of the crossbar of the outrigger bracket to one end of the outrigger seat; placing the bottom of the longitudinal rod of the outrigger bracket on the positioning plate and locking the top of the longitudinal rod under the arm support; passing the other end of the crossbar through the hole on the longitudinal rod and fixing the longitudinal rod to the crossbar with a locking nut.

[0019] Preferably, the longitudinal rod includes: a bracket support rod at the bottom for mounting on the positioning plate, with the through hole at the bottom; and a support rod sleeve threadedly connected to the bracket support rod, with a threaded hole at the center of the top; wherein the height of the support arm relative to the positioning plate is adjusted by adjusting the height of the support rod sleeve screwed on the bracket support rod.

[0020] Preferably, the longitudinal rod further includes one or more sets of telescopic components, the telescopic components including: a stepped cascade rod, the lower section with a smaller diameter and the upper section with a larger diameter both having external threads; and a cascade rod sleeve threaded to the larger diameter section of the cascade rod, the top center of which has a threaded hole.

[0021] Preferably, the arm support structure includes: an arm support adaptable to the arms of different radiotherapy patients; an angle adjustment component connected to the bottom of the arm support for 360-degree angle adjustment; a height adjustment component connected to the bottom of the angle adjustment component for height adjustment; the height adjustment component is fitted onto the platform support at the other end of the arm support arm.

[0022] Preferably, the armrest comprises multiple separate armrests.

[0023] Preferably, the multiple split armrests are armrests of different sizes and can be used interchangeably.

[0024] Preferably, the components of the arm support are made of carbon fiber.

[0025] Compared with the prior art, the breast support for radiotherapy of the present invention has the following beneficial effects:

[0026] 1. The breast support for radiotherapy of the present invention has an arm support that can reduce the overall space occupied, and the arm support has a large range of adjustment for height and angle, making it more convenient. The arm support can be used for patients of different body types and ages, and provides better support for the patient's elbow, improving the clinical comfort of the patient's elbow and the consistency of body position during treatment.

[0027] 2. The breast support for radiotherapy of the present invention has an arm support whose height can be coarsely and finely adjusted, which not only expands the range of height adjustment, but also meets the requirements of speed and convenience in height adjustment. In addition, the arm support has high stability when supporting the arm support.

[0028] 3. The breast support for radiotherapy of the present invention has a platform base embedded in the positioning plate with its upper surface flush with it, which avoids the patient being scratched by the platform base, increases the area that the patient can use on the breast support, and improves the comfort during treatment.

[0029] 4. This invention relates to a breast support for radiotherapy, comprising multiple separate arm supports. This design allows for independent adjustment of each arm support when supporting the patient's elbow. Each arm support can be rotated and adjusted at any angle in multiple dimensions according to the patient's elbow flexion. Furthermore, when adjusting the angle, the arm support height can be adjusted separately for different arm areas based on the patient's comfort and repeatability when raising their arm, achieving optimal positioning and treatment effectiveness. In addition, mixing arm supports of different sizes and models allows for adaptive fixation of arms of different thicknesses, lengths, and flexion / extension ranges for different patients.

[0030] 5. The breast support arm of this invention is made entirely of carbon fiber, reducing the likelihood of numerous metal artifacts or other forms of artifacts appearing on radiotherapy CT positioning images. This facilitates smooth radiotherapy planning calculations, reduces costs and time, and improves the work efficiency of radiotherapy physicians. Furthermore, the components of the arm support are detachably connected, facilitating repairs in case of damage and reducing long-term operating costs.

[0031] The present invention will now be described in detail with reference to the accompanying drawings. Attached Figure Description

[0032] Figure 1a This is a front view of the arm support of the present invention;

[0033] Figure 1b This is a left view of the arm support of the present invention;

[0034] Figure 1c This is a top view of the arm support of the present invention;

[0035] Figure 2a This is a front view of the support arm of the present invention;

[0036] Figure 2b This is a left view of the support arm of the present invention;

[0037] Figure 2c This is a top view of the support arm of the present invention;

[0038] Figure 3a This is a front view of the fixing bolt of the present invention;

[0039] Figure 3b This is a left view of the fixing bolt of the present invention;

[0040] Figure 3c This is a top view of the fixing bolt of the present invention;

[0041] Figure 4a This is a front view of the crossbar of the present invention;

[0042] Figure 4b This is a left view of the crossbar of the present invention;

[0043] Figure 4c This is a top view of the crossbar of the present invention;

[0044] Figure 5a This is a front view of the locking nut of the present invention;

[0045] Figure 5b This is a left view of the locking nut of the present invention;

[0046] Figure 5c This is a top view of the locking nut of the present invention;

[0047] Figure 6a This is a front view of the support arm bracket of the present invention;

[0048] Figure 6b This is a left view of the support arm bracket of the present invention;

[0049] Figure 6c This is a top view of the support arm bracket of the present invention;

[0050] Figure 7a This is a front view of the bracket support rod of the present invention;

[0051] Figure 7b This is a left view of the bracket support rod of the present invention;

[0052] Figure 7c This is a top view of the bracket support rod of the present invention;

[0053] Figure 8a This is a front view of the support sleeve of the present invention;

[0054] Figure 8b This is a left view of the support sleeve of the present invention;

[0055] Figure 8c This is a top view of the support sleeve of the present invention;

[0056] Figure 9a This is a front view of the cascade rod of the present invention;

[0057] Figure 9b This is a left view of the cascade rod of the present invention;

[0058] Figure 9c This is a top view of the cascade rod of the present invention;

[0059] Figure 10 This is a schematic diagram of the connection between the longitudinal rod and the breast positioning plate of the present invention;

[0060] Figure 11a This is a front view of the arm support arm of the present invention;

[0061] Figure 11b This is a left view of the arm support arm of the present invention;

[0062] Figure 11c This is a top view of the arm support arm of the present invention;

[0063] Figure 12a This is a front view of the connection between the arm support arm and the arm support seat of the present invention;

[0064] Figure 12b This is a left view of the connection between the arm support arm and the arm support seat of the present invention;

[0065] Figure 12c This is a top view of the connection between the arm support arm and the arm support seat of the present invention;

[0066] Figure 13a This is a front view of the platform support of the present invention;

[0067] Figure 13b This is a left view of the platform support of the present invention;

[0068] Figure 13c This is a top view of the platform support of the present invention;

[0069] Figure 14a This is a front view of the support sleeve of the present invention;

[0070] Figure 14b This is a left view of the support sleeve of the present invention;

[0071] Figure 14c This is a top view of the support sleeve of the present invention;

[0072] Figure 15a This is a front view of the universal ball joint of the present invention;

[0073] Figure 15b This is a left view of the universal ball joint of the present invention;

[0074] Figure 15c This is a top view of the universal ball joint of the present invention;

[0075] Figure 16a This is a front view of the universal ball joint of the present invention;

[0076] Figure 16b This is a left view of the universal ball joint of the present invention;

[0077] Figure 16c This is a top view of the universal ball joint of the present invention;

[0078] Figure 16d This is an analytical drawing of the dimensions of the universal ball joint of the present invention;

[0079] Figure 17a This is a front view of the universal ball fixing nut of the present invention;

[0080] Figure 17b This is a left view of the universal ball fixing nut of the present invention;

[0081] Figure 17c This is a bottom view of the universal ball fixing nut of the present invention;

[0082] Figure 18 This is a schematic diagram of the structure of the universal ball joint, connector, and fixing nut assembled according to the present invention;

[0083] Figure 19a This is a front view of the arm support platform of the present invention;

[0084] Figure 19b This is a left view of the arm support platform of the present invention;

[0085] Figure 19c This is a top view of the arm support platform of the present invention;

[0086] Figure 20a This is a front view of the split arm support support sleeve of the present invention;

[0087] Figure 20b This is a left view of the split arm support support sleeve of the present invention;

[0088] Figure 20c This is a top view of the split arm support pillar of the present invention;

[0089] Figure 21 This is a schematic diagram of the structure of the split arm support column of the present invention after assembly of the universal ball joint, connector and fixing nut;

[0090] Figure 22a This is a front view of the split armrest when the first type of armrest body is used in this invention;

[0091] Figure 22b This is a left view of the split armrest when the first type of armrest body is used in this invention;

[0092] Figure 22c This is a top view of the split armrest when the first type of armrest body is used in this invention;

[0093] Figure 22d This is a front view of the second type of arm support body of the present invention;

[0094] Figure 22e This is a left view of the second type of arm support body of the present invention;

[0095] Figure 22f This is a top view of the second type of arm support body of the present invention;

[0096] Figure 23a This is a front view of the platform support pillar of the present invention with scale markings;

[0097] Figure 23b This is a left view of the platform support pillar of the present invention with scale markings.

[0098] Figure 23c This is a top view of the platform support pillar of the present invention with scale markings;

[0099] Figure 24a This is a front view of the cascade rod of the present invention with scale markings.

[0100] Figure 24b This is a left view of the cascade rod of the present invention with scale markings.

[0101] Figure 24c This is a top view of the cascade rod of the present invention with scale markings;

[0102] Figure 25 This is a schematic diagram illustrating the position determination when the bracket support rod is equipped with scale markings and assembled with the sleeve;

[0103] Figure 26a This is a front view of the universal ball of the present invention with scale markings.

[0104] Figure 26b This is a left view of the universal ball of the present invention with scale markings;

[0105] Figure 26c This is a top view of the universal ball of the present invention with scale markings; Figure 27 This is a schematic diagram of the assembled structure of the universal ball joint, connector, and fixing nut when the universal ball has scale markings on it;

[0106] Figure 28 This is a schematic diagram of the positioning plate of the present invention;

[0107] Figure 29 This is a schematic diagram of the structure of a breast support device using existing technology. Detailed Implementation

[0108] like Figures 1a-1c The figures shown are schematic diagrams of different structures of the arm support in the breast support for radiotherapy of the present invention. Figure 28The diagram shows a schematic of a positioning plate used with an arm support. As can be seen from the diagram, the breast support for radiotherapy of the present invention includes: a positioning plate 100 having a base groove 101 thereon; an arm support 200 mounted on the positioning plate for supporting the arm of a radiotherapy patient, which includes: a platform base 1 mounted in the base groove of the positioning plate; an arm support 6 mounted on the platform base and rotatable relative to it; an arm support arm 2 mounted above the arm support and rotatably connected to it at one end; an arm support 4 mounted between the arm support and the arm support arm for adjusting the height of the arm support arm relative to the positioning plate; and an arm support structure 3 mounted at the other end of the arm support arm for supporting the arm of a radiotherapy patient.

[0109] Specifically, such as Figure 29 As shown, the positioning plate of the present invention has a pair of base grooves on both sides of the upper part for fixing a pair of arm supports respectively, and the base grooves are pre-machined with multiple bolt mounting holes (3 in the figure). The shape of the base grooves can be semi-circular, square, or other shapes.

[0110] This invention relates to an arm support for radiotherapy patients, mounted on a positioning plate. The arm support includes a platform base, an arm support, an arm support arm, an arm support frame, and an arm support structure. The platform base is positioned within a recessed groove on the positioning plate. The shape and size of the platform base match the shape and size of the recessed groove on the positioning plate, and the height of the platform base is approximately equal to the depth of the recessed groove. A threaded hole for connecting the arm support is located in the center of the platform base, and multiple mounting holes corresponding to the bolt mounting holes on the positioning plate are located around the threaded hole. After the platform base is inserted into the positioning groove, it is secured to the positioning plate by passing multiple fixing bolts 5 (three are shown in the figure, but the number is not fixed and should match the number of bolt mounting holes on the positioning plate and the number of mounting holes on the platform base) through the mounting holes and bolt mounting holes.

[0111] When the platform base is installed on the positioning plate, the upper surfaces of both are flush. In this way, the platform base can just cover the area where the positioning groove is located on the positioning plate without protruding beyond the positioning plate. Compared with the existing technology, this greatly reduces the space requirement of the arm support on the positioning plate, increases the area that the patient can use on the breast support, and reduces the possibility of the patient being scratched by contact with the platform base.

[0112] The support arm mount is installed above the platform base. For example... Figures 2a-2c As shown, the support arm base is a rectangular plate with a platform mounting hole 61 that penetrates the thickness and a support arm fixing sleeve 62 for connecting the support arm on both sides. A bracket screw 63 that is fixedly connected to and extends vertically outward is provided at the center of the end face where the support arm fixing sleeve is provided. The platform mounting hole is adapted to the threaded hole on the platform base.

[0113] The outrigger is rotatably mounted on the platform base via fixing bolts 7. For example... Figures 3a-3c As shown, the top of the fixing bolt is equipped with a fixing cap 71, the diameter of which is larger than the diameter of the platform mounting hole to prevent the support arm from detaching from the platform base due to accidental slippage from the top of the fixing bolt after assembly. The lower part of the fixing bolt is a threaded section 73 with external threads, and the upper part is a smooth rod section 72. The length of the threaded section is equivalent to the depth of the mounting hole on the platform base, and the length of the smooth rod section is consistent with the thickness of the support arm.

[0114] Since the outrigger is installed on the platform base by fixing bolts passing through the platform mounting holes, and the inner wall of the platform mounting holes and the surface of the platform base are smooth, after the outrigger is installed on the platform base using fixing bolts, the outrigger can rotate around the smooth rod section of the fixing bolts. This allows the arm support, outrigger bracket, and arm support structure connected to the outrigger to rotate relative to the platform base to adjust the angle.

[0115] A bracket screw at one end of the outrigger base is used for detachable connection with the crossbar of the outrigger bracket, so that the crossbar and outrigger bracket can rotate synchronously with the outrigger base after assembly. For example, Figures 4a-10 As shown, the outrigger bracket of the present invention includes: a crossbar 41 detachably mounted at one end of the outrigger seat; a longitudinal rod with its bottom for placement on a positioning plate and its top for locking under the outrigger support, having a through hole thereon, allowing the longitudinal rod to move within the outrigger bracket groove on the positioning plate; the other end of the crossbar passes through the through hole on the longitudinal rod and is fixed to the crossbar by a locking nut 42, so that the crossbar can drive the longitudinal rod to rotate synchronously when the outrigger seat rotates.

[0116] The crossbar can be made of, for example Figures 4a-4c The structure shown is a cylindrical connecting rod made of carbon fiber. One end of the crossbar has a threaded hole at its center, which matches the external thread of the support bolt of the outrigger, allowing the crossbar to be detachably connected to the outrigger by screwing it onto the support bolt. The other end of the crossbar has an external thread for use with... Figures 5a-5c The locking nut shown is for use with this device.

[0117] The longitudinal rod can adopt the following structure, including: a bottom base 433 for mounting the bracket support rod 43 on the positioning plate, which is perpendicular to the positioning plate; a through hole 432 is opened at the lower part of the bracket support rod, and an external thread is provided at the upper part; a sleeve stop 431 is provided on the outer wall near the through hole; the bottom base can move within the support bracket groove of the positioning plate, and is driven by the crossbar connected to it during movement; and a support rod sleeve 44 (e.g., ...) threadedly connected to the bracket support rod. Figures 8a-8c As shown), a threaded hole 441 is opened at the center of its top; the height of the support arm relative to the positioning plate is adjusted by adjusting the height of the support sleeve screwed on the bracket support rod. In addition, the longitudinal rod may also include one or more sets of telescopic components (such as...). Figure 10As shown, a set of telescopic components is illustrated. This telescopic component includes: a stepped cascade rod 45, with external threads on both its lower, smaller diameter section 451 and its upper, larger diameter section; and a cascade rod sleeve (not shown in the figure, but with a structure similar to...) threadedly connected to the larger diameter section of the cascade rod. Figures 8a-8c (The support sleeve shown is the same), with a threaded hole at the center of its top.

[0118] Specifically, the longitudinal rod of the present invention includes a bracket support rod, a support rod sleeve, and one or more sets of telescopic components of a cascade rod and a cascade rod sleeve.

[0119] Among them, the bracket support rod can be adopted as follows: Figures 7a-7c The structure shown is a cylinder with threaded sections in the middle and upper parts, each with external threads. A sleeve stop protruding radially outward is located on the outer wall of the cylinder below the threaded section. The sleeve stop can be a pair, symmetrically arranged on both sides of the cylinder, or it can be annular, surrounding the outer wall of the cylinder. The sleeve stop restricts the downward movement of the support rod sleeve fitted onto it. Below the sleeve stop is a through hole (i.e., the aforementioned through hole) for the crossbar to pass through. The through hole radially penetrates the cylinder along the support rod, with a radius the same as the crossbar's radius but smaller than the support rod's own radius. The radius of the portion below the through hole of the support rod increases to form a base. The base radius can be the same as or slightly smaller than the width of the support rod groove on the positioning plate (if the positioning plate has a support arm bracket groove, not shown in the figure). When the support arm bracket rotates with the support arm seat, the base slides in the support arm bracket groove.

[0120] The bracket support rod is the main supporting part of the longitudinal rod. During use, it can rotate synchronously with the support arm seat via the connecting crossbar. When the positioning plate has a support arm bracket slot, the bracket support rod always slides within the slot during rotation. Alternatively, the positioning plate may not have a support rod slot; in this case, the bracket support rod will always slide on the surface of the positioning plate during rotation. The bracket support rod and support rod sleeve are used together to adjust the length of the longitudinal rod, specifically by rotating the support rod sleeve on the bracket support rod.

[0121] Among them, the support sleeve can be adopted as follows: Figures 8a-8c The structure shown is a hollow, open-bottomed cylindrical sleeve. Its functions are: first, to finely adjust the length of the longitudinal rod in conjunction with the bracket support rod; and second, to quickly adjust and lock the height of the arm support arm in conjunction with the arm support arm's latch. The inner wall of the support sleeve has an internal thread 442, and the top center has a threaded hole 441. The internal thread is used to mate with the threaded section of the bracket support rod, and the length of the inner wall is the same as the length of the threaded section of the bracket support rod. In use, the support sleeve can be installed onto the bracket support rod by rotating it, and the sum of their heights can be changed by rotating the support sleeve itself, thus achieving stepless adjustment of the longitudinal rod height. Before installing the support sleeve onto the bracket support rod, a locking nut 46 can be installed on the bracket support rod (see [link to product details]). Figure 10After installing the support sleeve, adjust the locking nut to the lower position of the support sleeve as needed. The locking nut prevents the support sleeve from rotating accidentally during use, thus avoiding accidental changes in the patient's arm position during radiotherapy and ensuring the treatment effect.

[0122] The threaded interface (i.e., the threaded hole mentioned above) at the top of the support sleeve is used for connection with the cascade rod. The cascade rod can be made of, for example... Figures 9a-9c The stepped structure shown consists of a larger-diameter section formed by a solid cylinder at the top and a smaller-diameter section formed by a slender connecting rod at the bottom. The entire outer wall of the cascade rod is threaded for connection to the support sleeve, increasing the maximum height of the support arm. The radius and thread pitch of the larger-diameter section of the cascade rod are the same as those of the upper part of the support rod. The length and thread pitch of the smaller-diameter section of the cascade rod match the length and pitch of the threaded interface on the support sleeve, ensuring a perfect fit after the cascade rod is installed onto the support sleeve. The length of the cascade rod itself is not fixed and can be customized according to clinical application scenarios.

[0123] The structure of the cascade rod sleeve is exactly the same as that of the support rod sleeve. Except for its height, the dimensions of the cascade rod sleeve are identical to those of the support rod sleeve. There is no fixed requirement for the height of the cascade rod sleeve; it can be customized according to actual conditions. It only needs to ensure that its inner wall length and radius are the same as the thread length of the larger diameter section of the cascade rod being used. During manufacturing, cascade rod sleeves with different heights but the same inner diameter, internal thread, and threaded hole can be produced to improve adaptability and facilitate selection based on actual needs.

[0124] In this invention, the longitudinal rod serves as the supporting component of the arm support arm. Its height can be changed by rotating a support sleeve or a telescopic assembly mounted on the bracket support rod. Different longitudinal rod heights are interlocked with the latches on the lower side of the arm support arm at different heights to provide support for the arm support arm at various heights. In clinical use, the height of a single latch can be finely adjusted by rotating the support sleeve. Rapid or significant adjustments to the arm support arm height can be achieved by adjusting the longitudinal rod height or directly increasing or decreasing the number of cascaded rods and interlocking them with different latches. Furthermore, the range of height adjustment achieved with a single rotation can be adjusted by using different thread pitch lengths.

[0125] During assembly, one end of the crossbar of the outrigger bracket is mounted on the outrigger seat, and a locking nut 42 is installed on the other end. Then, the crossbar is passed through the through hole in the longitudinal bar, and another locking nut is installed on the protruding end of the crossbar (see [link]). Figures 6a-6c After both nuts are installed, rotate and tighten them to fix the crossbar relative to the longitudinal bar, preventing the longitudinal bar from sliding along the crossbar as it rotates with the support arm.

[0126] To rotatably connect the arm support arm to the arm support base, this invention includes a cylindrical arm fixing sleeve fixedly installed on each side of the upper surface of the arm support base. A certain gap is reserved between the two arm fixing sleeves for installing the arm support arm, and the reserved gap is consistent with the size of the arm rotating sleeve on the arm support arm. During assembly, the arm rotating sleeve of the arm support arm is located between the two arm fixing sleeves on the arm support base and is coaxial with the arm fixing sleeves. The arm rotating sleeve and the two arm fixing sleeves are connected together by connectors such as bolts, pins, or fixing shafts, allowing the arm support arm to rotate relative to the arm support base around the central axis of the connector to facilitate height adjustment of the arm support bracket. After the height is properly adjusted, the arm rotating sleeve and the two arm fixing sleeves can be tightened together to prevent the arm support arm from rotating relative to the arm support base. Of course, the three fixing sleeves can also be left loose. During design, the size of the arm support base and its installation position on the platform base must be reasonably determined to ensure that the arm support base does not interfere with the platform base when rotating relative to it.

[0127] The arm support arm of this invention adjusts its height by rotating around a connecting member, thereby adjusting the height of the arm support. This arm support arm can be adopted as follows: Figures 11a-11c The structure shown includes: a generally rectangular body 21; a support arm rotating sleeve 24 disposed at one end of the body; support arm connecting columns 22 and arm support platform support columns 25 disposed opposite to each other on the other side of the body; and fixing buckles 23 disposed on the side wall of the body on the same side as the support arm connecting columns (also referred to as the back side of the arm support arm).

[0128] The arm support platform strut connects to the arm support structure to provide support. The arm swivel sleeve is the connecting component between the arm support arm and the arm support base. It is a cylindrical body with inner and outer wall dimensions matching those of the arm fixing sleeve on the arm support base, and its length equal to the distance between the two arm fixing sleeves on the arm support base. In use, the arm swivel sleeve on the arm support arm is inserted between the two arm fixing sleeves on the arm support base, and a connecting piece for fixing is inserted therein. The connecting piece is a solid cylinder with a radius the same as the inner radius of the arm fixing sleeve and the arm swivel sleeve, and a length the same as the width of the arm support base.

[0129] For a structural diagram of the arm support arm and arm base after assembly, please refer to [reference needed]. Figures 12a-12cThe function of the retaining clips on the back of the arm support is to fix the position of the uppermost sleeve in the arm support bracket, preventing relative displacement between the arm support and the longitudinal rod. To ensure that the arm support has a retaining clip that matches the uppermost sleeve of the arm support bracket at different heights, this invention provides multiple retaining clips on the back of the arm support. The number of clips is not fixed and can be determined according to the usage scenario or the maximum usable height required by the arm support. The clips can be fixed to the body of the arm support by adhesive, integral molding with the body, threaded connection, or interference fit. Correspondingly, the spacing between adjacent clips on the back of the body is not fixed, but the minimum spacing should be greater than the outer radius of the uppermost sleeve. In the design, the longitudinal section of the clip can be square or inverted conical, and the front side (i.e., the side closest to the arm support platform) is used to abut against the side wall of the uppermost sleeve in the arm support bracket, thus securing the arm support. The arm support connecting column on the back of the arm support is a reserved connector that can be used as an installation point for other accessories later. For example, it can hold the arm support bracket in place, or it can serve as an auxiliary support between the arm support and the positioning plate when the arm support needs to be placed horizontally.

[0130] The purpose of installing a platform support on the upper side of the boom support arm (relative to the back of the fixing clips and the boom connecting column) is to provide support for the boom support structure, enabling adjustments to the height and angle of the boom support structure. This platform support is fixedly installed on the boom support arm, such as... Figures 13a-13c As shown, the platform support is a solid cylinder with external threads on its outer surface. The base is formed by an increased radius at the bottom, and the base is fixedly connected to the main body of the arm support. The radius and height of the platform support itself are not fixed, and the thread pitch can be customized according to the usage scenario or requirements to achieve fine adjustment of the height of the arm support platform.

[0131] The arm support structure installed on the arm support arm in this invention can be adapted to different radiotherapy patients' arms to provide close-fitting support, such as... Figures 14a-22c As shown, the arm support structure includes: an arm support adaptable to the arms of different radiotherapy patients, including multiple arm supports; an angle fine-tuning component connected to the bottom of the arm support for 360-degree angle adjustment; and a height fine-tuning component connected to the bottom of the angle fine-tuning component for adjusting its height, which is fitted onto the platform support of the arm support arm.

[0132] Specifically, the height adjustment component connects to the boom support arm via a platform support sleeve 26, which is fitted onto the platform support arm. The boom support height is adjusted through the cooperation between the platform support sleeve and the platform support arm. This platform support sleeve can be, for example, […]. Figures 14a-14c The structure shown has an internal thread 262 on the inner wall and a threaded hole 261 at the top center. The internal thread is used to match the external thread of the platform support. The height of the sleeve can be determined according to the actual situation, as long as its inner wall length and radius are the same as those of the platform support used.

[0133] In addition, the height adjustment assembly may also include cascade rods, cascade rod sleeves, and locking nuts for use with platform support sleeves. The cascade rods and sleeves can be a single set or multiple sets. These components have the same structure and usage as the corresponding components in the telescopic assembly of the outrigger bracket, and will not be described in detail here. When using these components, only their dimensions need to be matched according to the thread pitch of the platform support sleeve or the requirements of the application scenario; this will also not be elaborated upon here.

[0134] This invention allows for further adjustment of the boom height mounted on the boom arm via a height fine-tuning component. Furthermore, since the components are connected by threads, it is possible to determine whether to add cascading rods or other components to the platform support sleeve based on actual conditions, making it more flexible in use.

[0135] The uppermost sleeve in the height adjustment assembly connects to the angle adjustment assembly, allowing for 360-degree angle adjustment of the arm rest. This angle adjustment assembly can employ methods such as... Figure 18 The structure shown includes, from bottom to top, a universal ball joint 27, a universal ball fixing nut 29, and a universal ball connector 28.

[0136] Among them, such as Figures 15a-15c As shown, the omnidirectional ball joint includes: a ball with radius R1 located at the top, referred to as the omnidirectional ball 273; and a cylinder fixedly connected to the bottom of the omnidirectional ball, referred to as the omnidirectional ball support rod. The radius R1 of the omnidirectional ball is larger than the radius of the omnidirectional ball support rod located below it. The lower section of the omnidirectional ball support rod has an external thread 271, and the upper section is a smooth rod 272, but the surface of the smooth rod is frosted. In use, the lower section is screwed into the threaded hole at the top of the uppermost sleeve in the height adjustment assembly, completing the assembly of the omnidirectional ball joint and the height adjustment assembly.

[0137] like Figures 16a-16d As shown, the universal ball joint is a cylinder with a spherical groove 281 at the bottom and a threaded hole at the top that is not connected to the spherical groove. External threads 282 are provided on the outer wall. The universal ball joint is installed below and fixedly connected to the arm support, allowing the arm support to rotate 360 ​​degrees around the surface of the universal ball. Figure 16cAs seen in the bottom view, the spherical groove inside the ball joint has a non-smooth surface, consisting of several small, stepped, arc-shaped cross-sections. These cross-sections are discontinuous spherical surfaces of a sphere with radius R1 (where R1 is the radius of the spherical ball). To further increase the friction between the surface of the spherical groove and the spherical ball of the ball joint linkage, the surface of the spherical groove needs to be sanded. It is important to note that the maximum radius R2 of the cross-section of the spherical groove is smaller than the radius R1 of the spherical ball to ensure that the spherical ball can fit snugly within the groove. Simultaneously, the depth H1 of the groove must be less than R2 to ensure that the spherical ball of the ball joint linkage can be embedded within the groove and that the contact surfaces of both can completely adhere. The dimensional relationships can be found in [reference needed]. Figure 16d The analytical diagram.

[0138] The swivel joint and the swivel joint connector are connected together by a swivel joint retaining nut. The rotation of the swivel joint retaining nut establishes the movement or locking relationship between the swivel joint and the swivel joint's swivel. For example... Figures 17a-17c As shown, the universal ball fixing nut includes: a hollow cylinder 292 located at the upper part; and a ball platform located at the lower part and fixedly connected to the lower end of the cylinder.

[0139] The cylindrical hollow inner wall is threaded, with the internal thread matching the external thread of the universal ball joint, allowing the universal ball joint to be screwed into the threaded hole of the universal ball fixing nut. It should be noted that the height of the cylindrical part of the universal ball fixing nut must be less than the height of the universal ball joint.

[0140] The table also features a spherical groove 293 located on its upper part. The surface of this groove is not smooth; it consists of several small, stepped, arc-shaped cross-sections, each a discontinuous spherical surface of a ball with a radius of R1 (R1 being the radius of the universal ball). Similarly, to further increase the friction between the spherical groove surface and the universal ball of the universal ball joint, the surface of the groove needs to be sanded. The maximum radius R3 of the spherical groove's cross-section must be smaller than the universal ball radius R1.

[0141] It is particularly important to note that the spherical groove at the ball joint is a one-way open groove, meaning its maximum diameter is located at the bottom of the ball joint and is not connected to its top threaded hole. However, the spherical groove of the ball-mounted nut is a two-way open structure, meaning its maximum diameter is located at the connection between the ball joint and the cylinder. An opening with radius R4 is provided at the center of the bottom of the spherical groove. This opening allows the ball support rod to pass through the spherical groove from top to bottom, extend out of the opening, and screw into the threaded hole of the uppermost sleeve in the height adjustment assembly. It also provides space for the ball-mounted nut to rotate around the ball. In the design, R4 is less than the ball radius R1 and greater than the ball support rod radius. It should be noted that because the lower layer of the ball-mounted nut is a spherical groove, the contact area between the groove and the ball is also related to R4. A larger R4 value results in a larger usable rotation range, but also reduces the maximum friction force provided by the nut, and vice versa. Therefore, the size of R4 can be determined according to the usage scenario.

[0142] Furthermore, the present invention features four outwardly protruding handles 291 symmetrically arranged on the outer wall of the frustum-shaped body of the universal ball fixing nut, with an angle of 90 degrees between adjacent handles. These handles are used to rotate the universal ball fixing nut.

[0143] The principle behind securing the position of a swivel ball with a ball joint locking nut is as follows: The ball joint and the swivel joint connector are connected via the ball joint locking nut. However, before the locking nut is fully rotated upwards to its maximum position (also known as the locked position), there may be a slight gap or a loose connection between the swivel joint and the ball joint, allowing the swivel joint to rotate freely around the ball. Since the ball joint locking nut is threaded onto the swivel joint, it rotates synchronously with the swivel joint at the same angle. As the locking nut gradually rotates upwards, the contact area between the ball joint and the spherical grooves of the ball joint and locking nut increases, gradually creating friction that hinders further rotation. At this point, the friction between the three is proportional to the magnitude of the mutual pressure. Based on this, as the fixing nut continues to rotate upwards, the frictional force between the three components gradually increases along with the pressure, until the fixing nut rotates to the locked position, where the maximum frictional force is formed, thus preventing the ball joint from moving relative to the ball. At this point, the position and angle of the ball joint remain fixed (see [reference]). Figure 18 ).

[0144] The following describes the assembly process between the ball joint, ball linkage, ball retaining nut, and the uppermost sleeve mounted on the arm support platform:

[0145] First, insert the swivel link into the swivel fixing nut from above. Because the radius of the swivel ball is smaller than the radius of the upper inner wall of the fixing nut, the swivel ball can fall directly into the spherical groove at the bottom of the fixing nut. Since the spherical groove at the bottom of the fixing nut has an opening, and the radius of the opening R4 is smaller than R1 but larger than the radius of the swivel link, the swivel link can extend downwards from the opening, with only a small portion of the swivel ball protruding from the opening, thus securing the swivel ball to the swivel fixing nut. Next, install the swivel link onto the threaded hole above the uppermost sleeve on the arm support platform. Because there is still a distance between the thread of the swivel link and the swivel ball, the above operation is practical. After the swivel link is installed, connect the spherical groove at the swivel joint to the swivel ball, and rotate the swivel fixing nut to complete the installation of the fixing nut and the swivel joint.

[0146] The present invention provides an arm support mounted above an angle fine-tuning component. The arm support includes an arm support support member and an arm support. The arm support support member includes an arm support platform and an arm support sleeve. The arm support is mounted above the arm support sleeve and includes multiple split arm supports.

[0147] Specifically, the arm support platform can adopt, for example... Figures 19a-19c The structure shown includes: a rectangular arm support platform body 32; multiple split arm support struts 31 fixedly installed above the arm support platform body and arranged in parallel; and a universal ball joint interface 33 fixedly installed below the arm support platform body, with external threads on the outer wall of the universal ball joint interface. The arm support platform serves two purposes: first, to provide a support platform for the split arm support struts; and second, to enable overall angle adjustment of the split arm support. The size and thickness of the arm support platform can be adjusted according to the number, size, and load-bearing capacity of the split arm support used.

[0148] During assembly, the arm support platform is connected to the internal thread of the universal ball fixing nut in the angle fine-tuning component via a universal ball joint interface. The universal ball joint interface serves as the universal connection between the arm support platform and the arm support arm; as it rotates around the universal ball at any angle, it also drives the arm support platform to adjust at any angle, thus achieving overall angle adjustment of the split arm support mounted on it. Several split arm support struts are mounted on the arm support platform, each with external threads. Their structure is the same as that of the arm support struts and will not be detailed here. During design, the number, height, radius, and installation position and spacing of the split arm support struts on the arm support platform body are not fixed values ​​and can be freely selected according to the usage scenario. It is important to note that the spacing of the split arm support struts must consider the size of the matching split arm support, and the minimum spacing must ensure that the positional relationship of the split arm support does not interfere with each other after installation. The maximum radius of the strut should not exceed 50% of the width of the arm support platform body.

[0149] The split armrest support column needs to be matched with the split armrest support column sleeve to achieve the height adjustment of the split armrest. The structure of the split armrest support column sleeve is as follows: Figures 20a-20c As shown, the cylinder is closed at the top and open at the bottom. The inner wall is provided with an internal thread 342 to match the external thread of the split arm support column, and a threaded hole 341 is opened at the center of the upper end. The length of the split arm support column sleeve has no fixed requirements and can be freely customized, as long as its inner wall length, radius, and thread pitch are the same as the split arm support column used with it.

[0150] Furthermore, the split arm support strut and the split arm support strut sleeve can also be used with the universal ball linkage 35, the universal ball fixing nut 36, and the universal ball connector 37 (such as...). Figure 21 (As shown) the angle adjustment of the split arm support can only be completed. The structure of the universal ball joint, universal ball fixing nut, and universal ball connector 37 can be referred to the structure of the corresponding parts in the arm support arm above. The assembly principle with the split arm support pillar is also the same as described above, and will not be repeated here.

[0151] In addition, the split arm support strut can also be used with locking nuts, cascading rods, and cascading rod sleeves. The structures of the locking nuts, cascading rods, and cascading rod sleeves are the same as those of the corresponding components in the outrigger bracket. The principles and usage of these components with the split arm support strut are the same as those of the components in the outrigger bracket, and will not be repeated here. It is particularly important to note that the dimensions of the aforementioned connecting components, such as length and radius, can be adjusted according to the usage scenario and do not need to be completely identical to those of the components in the outrigger bracket. The arm support can be... Figures 22a-22c The structure shown includes multiple separate arm supports (only five are shown in the figure, but other numbers are possible). These separate arm supports can be used independently, and each arm support has the same structure and function, while its size and cross-sectional curvature can be customized. Each arm support consists of two parts: a U-shaped, C-shaped, or variable-thickness arc-shaped arm support body and a swivel ball joint 381, both integrally molded. The U-shaped arm support body can be seen in [reference needed]. Figure 22a The variable-thickness, arc-shaped armrest body can be seen in... Figure 22d-22f The main function of the armrest body is to provide stable support for the elbow and surrounding area. The use of U-shaped, C-shaped, or variable-thickness arc-shaped structures here enhances its support for the elbow. The swivel joint is the connecting component between the armrest body and the separate armrest support structure. This component allows the armrest body to rotate at any angle around the connected swivel joint. The structure of this swivel joint is the same as that of the aforementioned swivel joint connector, and its connection structure with the swivel fixing nut, swivel linkage, etc., is also the same as described above, and will not be repeated here.

[0152] It's important to note that although the diagram shows five identical split armrests, the actual number used and the size of each individual armrest can be customized according to the usage scenario. There is no fixed requirement for the quantity; the only requirement is that the number of armrest supports matches the number of individual armrest supports. During use, the angle and height of each armrest can be adjusted according to the elbow flexion / extension angle, arm elevation height, and the required coverage of the corresponding area. These adjustments are achieved through the universal ball joint and the position of the armrest support sleeve. The split armrest design can incorporate multiple armrest bodies with different cross-sectional curvatures and sizes, but identical universal ball joints, based on the user's body type or arm length distribution. Because different sets of armrest bodies share the same universal ball joint, multiple sets of split armrests can be used interchangeably to further enhance the coverage, stability, and comfort of the patient's elbow area. Clinically, when a patient experiences poor fixation in a localized area of ​​their arm, the fixation angle or height of the corresponding armrest in that area can be adjusted to resolve the issue. In this case, other armrests do not require adjustment.

[0153] When performing radiotherapy positioning, except for the treatment mode of adaptive radiotherapy, all other treatment methods need to save or record as many positioning parameters as possible to ensure the consistency between subsequent treatment and the conditions at the time of patient positioning, thereby reducing positioning uncertainty and improving the accuracy of radiotherapy positioning.

[0154] The present invention uses a breast support with the above-mentioned components. Patients can adjust the arm sleeve and arm support support sleeve to the optimal position according to their own feelings during positioning. However, since the optimal position cannot be saved or read, there will be a problem that the position cannot be accurately reproduced during subsequent treatment.

[0155] To address the aforementioned issue of inaccurately reproducing the optimal position, this invention adds graduated markings to the outer walls of the bracket support rod, cascade rod, arm support platform support column, and split arm support column. This ensures that the current position of the sleeve can be read when the corresponding sleeve rotates on the connected support column, rod, or cascade rod. In subsequent positioning, simply rotating the same sleeve to the same position satisfies the requirement for repeatability. Specifically, the position is determined by observing the lower edge of the sleeve (e.g., when the sleeve is rotated to its final position) with the naked eye (the eye must be level with the lower edge of the sleeve). Figure 25 As shown in the figure, the scale value corresponding to the scale observation edge is represented.

[0156] To ensure more accurate, convenient, and unobstructed position recording, this invention engraves scale marks on the bracket support rod, cascade rod, arm support platform support (i.e., the aforementioned platform support rod), and split arm support support rod on multiple directions (e.g., four directions) of the corresponding support rod and support rod outer wall. The absolute height value at the 0 mark in each direction is differentiated to improve measurement accuracy. For example, when the absolute height value at the 0 mark on the front is 100.0 mm, and the difference between adjacent marks is 1 mm, then the absolute height value at the 0 mark on the left is 99.75 mm, i.e., a relative height difference of 0.25 mm; the absolute height value at the 0 mark on the back is 99.50 mm, i.e., a relative height difference of 0.50 mm; and the absolute height value at the 0 mark on the right is 99.25 mm, i.e., a relative height difference of 0.75 mm. However, the difference between adjacent marks on these three lines remains unchanged at 1 mm. This design allows for a measurement accuracy of 0.25mm while maintaining a measurement accuracy of 1mm across all scales.

[0157] To ensure that users can distinguish the differences in absolute height values ​​at the 0 mark between different scales during actual use, this invention employs three methods for differentiation: 1. Naming and engraving the scales in different directions on the support or rod, such as scales A, B, C, and D; 2. Engraving the absolute height value at the 0 mark for scales in different directions, such as 100.0mm, 99.75mm, 99.50mm, and 99.25mm; 3. Different colors are used to differentiate scales in different directions. For example, scale A on the front has its absolute height value of 100.0mm engraved at its 0 mark, with the scale line in red; scale B on its left has its absolute height value of 99.75mm engraved at its 0 mark, with the scale line in blue, and so on for the other two scales.

[0158] The structural diagram showing the scale markings on the arm support platform support and the split arm support support can be found in the following figure. Figures 23a-23c For setting scale marks on the cascade rods, please refer to [reference needed]. Figures 24a-24c .

[0159] Furthermore, since the arm support platform can rotate at any angle in three-dimensional space, it is difficult to reproduce the optimal adjustment position without relevant parameter records. To solve this problem, this invention engraves several annular scale lines with a radius equal to the radius of the sphere on the surface of the universal ball, and the scale lines are engraved with angle values. The scale lines engraved on the surface of the universal ball can be divided into two categories (such as... Figures 26a-26cOne type is the mutually perpendicular baseline scale lines, such as scale lines A and C. The other type is the auxiliary scale lines that exist at a certain angle to the baseline scale lines, such as scale lines B and D. The baseline scale lines are mandatory and can only be two mutually perpendicular lines; the number of auxiliary scale lines and their angles with the baseline scale lines are variable, as long as they match the lower interface R4 of the universal ball joint fixing nut. The principle for setting the scale lines is to ensure that at least two scale lines intersect with the lower interface when the universal ball joint fixing nut rotates around the universal ball, so that the position of the universal ball joint fixing nut can be accurately read, such as... Figure 27 As shown.

[0160] In summary, the breast support for radiotherapy of the present invention has the following advantages:

[0161] 1. Independent Adjustment Function of Split Armrests: The split armrests supporting the patient's elbows are independently adjustable. This allows each armrest to rotate at any angle in multiple dimensions according to the degree of flexion of the patient's elbow. Furthermore, when adjusting the angle, the armrest height can be adjusted separately for different arm areas based on the patient's comfort and repeatability when raising their arm, to achieve the best positioning and treatment effect.

[0162] 2. Rapid and Stepless Adjustment of Outrigger Height: Rapid adjustment of the outrigger height is achieved through the cooperation of the outrigger rod and the latch. By incorporating cascading rods and cascading rod sleeves, the maximum length of the outrigger and the adjustable height range of the outrigger can be further increased compared to a single set of outrigger rods and sleeves. For fine adjustment, the outrigger sleeve enables stepless adjustment of the support rod height, thus allowing for stepless adjustment of the outrigger height as well. Compared to existing equipment that only allows for a few fixed heights, the precision of height adjustment in this application is significantly improved. Furthermore, the support stability of the support rod under outrigger swaying is also improved.

[0163] 3. Flexible combination of armrests with different cross-sectional curvatures and sizes: When fixing the elbow of breast cancer patients, different types of split armrests with different cross-sectional curvatures and sizes can be flexibly matched according to the arm thickness (for patients of different body types), arm length (for patients of different heights), and arm flexion and extension range (the degree of damage to the brachial plexus, rotator cuff muscles or frozen shoulder and shoulder ligaments caused by mastectomy) to fix the arm, thus solving the problem that existing single-size armrests cannot be accurately fitted.

[0164] 4. Reduce the space occupied by the arm support on the positioning plate: The arm support adopts an integrated design concept to minimize the space occupied by the device itself, which greatly reduces the space requirement of the arm support on the positioning plate. The protruding area of ​​the arm support on the positioning plate is minimized, thereby increasing the usable area of ​​the patient on the positioning plate while reducing the possibility of the patient being scratched by the protrusion of the arm support itself.

[0165] 5. Carbon fiber construction of all components: All structural components of the arm support are made of carbon fiber, and assembly and use can be completed without any metal connectors. The arm support itself is not a one-piece molded design, and the various components and connectors are easy to disassemble and replace, resulting in low maintenance costs.

[0166] Although the present invention has been described in detail above, the present invention is not limited thereto. Those skilled in the art can make modifications based on the principles of the present invention. Therefore, all modifications made in accordance with the principles of the present invention should be understood as falling within the protection scope of the present invention.

Claims

1. A breast support for radiotherapy, comprising: It has a positioning plate with a base groove; An arm support mounted on a positioning plate for supporting the arm of a radiotherapy patient, comprising: A platform base installed in the base groove of the positioning plate; A support arm mounted on a platform base and rotatable relative to it; An arm support arm installed above the arm base and rotatably connected to it at one end; An arm bracket installed between the arm support and the arm support arm for adjusting the height of the arm support arm relative to the positioning plate. An arm support structure installed at the other end of the arm support arm and used to support the arm of a radiotherapy patient.

2. The breast support for radiotherapy according to claim 1, wherein the upper surface of the platform base is flush with the upper surface of the positioning plate.

3. The breast support for radiotherapy according to claim 1, wherein the arm support is rotatably mounted on the platform base by a fixing bolt with external threads at the bottom and a smooth rod at the top.

4. The breast support for radiotherapy according to claim 1, wherein the support arm comprises: One end of the crossbar of the outrigger bracket can be detachably installed at one end of the outrigger base; The bottom of the longitudinal rod of the outrigger bracket is placed on the positioning plate, and the top is locked under the outrigger bracket. Pass the other end of the crossbar through the hole on the longitudinal bar, and fix the longitudinal bar to the crossbar with a lock nut.

5. The breast support for radiotherapy according to claim 4, wherein the longitudinal rod comprises: The bottom is a bracket support rod for mounting on the positioning plate, and the lower part of the bracket has the aforementioned perforation; The support sleeve, which is threaded to the bracket support rod, has a threaded hole at the center of its top; The height of the support arm relative to the positioning plate is adjusted by adjusting the height of the support sleeve screwed onto the bracket support rod.

6. The breast support for radiotherapy according to claim 5, wherein the longitudinal rod further comprises one or more sets of telescopic components, the telescopic components comprising: The stepped cascade rod has external threads on both the lower, smaller diameter section and the upper, larger diameter section. The cascade rod sleeve, which is threaded to the larger diameter section of the cascade rod, has a threaded hole at its top center.

7. The breast support for radiotherapy according to claim 5 or 6, wherein the arm support structure comprises: Arm support that can fit the arms of different radiotherapy patients; An angle adjustment assembly connected to the bottom of the armrest for 360-degree angle adjustment; A height adjustment component connected to the bottom of the angle adjustment component for adjusting its height; The height adjustment assembly is mounted on the platform support at the other end of the arm support arm.

8. The breast support for radiotherapy according to claim 7, wherein the arm support comprises a plurality of separate arm supports.

9. The breast support for radiotherapy according to claim 8, wherein the plurality of separate arm supports are arm supports of different sizes.

10. The breast support for radiotherapy according to any one of claims 1-9, wherein each component of the arm support is made of carbon fiber.

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