Customizable prone position mammary gland stereotactic device and manufacturing method thereof

Abstract

The invention discloses a customizable prone position mammary gland stereotactic device and a manufacturing method thereof, and relates to the technical field of radiotherapy positioning devices.The device comprises a fixing mechanism, a guiding mechanism and a positioning mechanism; the fixing mechanism comprises a customizable tissue compensation membrane, a fixing bracket, a supporting seat and a first threaded column; the fixed bracket comprises a customizable three-dimensional bracket and a bracket fixing disc, a first threaded column is arranged at the bottom of the bracket fixing disc and is in threaded connection with the supporting seat, and an adjusting knob and height scale marks are further arranged on the first threaded column; guide rail grooves are formed in the bottoms of the supporting seats; the guide mechanism comprises a transverse guide rail matched with the guide rail groove, and horizontal scale marks are arranged on the transverse guide rail. The positioning mechanism comprises a bed board and a positioning seat, positioning grooves are formed in the positioning seat, and the positioning seat is inserted into the two ends of the transverse guide rail through the positioning grooves; and the positioning seat is also provided with vertical scale marks. The device can effectively improve the positioning precision during radiotherapy after the breast cancer surgery, and improves the accuracy and safety of radiotherapy.

Description

Technical Field

[0001] The present invention relates to the technical field of radiotherapy positioning devices, and particularly relates to a customizable prone breast stereotactic device. Background Art

[0002] As the most common malignant tumor among women, the accuracy of the treatment plan for breast cancer has a decisive impact on patients after surgery. For early breast cancer patients, breast-conserving radical surgery combined with postoperative adjuvant radiotherapy has become an internationally recognized standard treatment mode, and its efficacy indicators are equivalent to those of modified radical mastectomy. At the same time, it has comprehensive advantages such as less trauma, fewer complications, and higher quality of life. Clinical studies have confirmed that systematic implementation of radiotherapy after breast-conserving surgery can reduce the local recurrence risk by more than 70%, significantly improving the five-year survival rate of patients.

[0003] During the implementation of radiotherapy, the accuracy of target area positioning directly affects the treatment effect. Due to the special anatomical characteristics of breast tissue, current radiotherapy technologies face two challenges: First, it is difficult to ensure the repeatability of the body position, and patients are prone to spatial displacement deviation during multiple treatments; Second, there are technical bottlenecks in dose distribution control, which directly affect the treatment safety margin. The above problems are particularly prominent in traditional supine radiotherapy: 1. Defects in body position stability: When in the supine position, breast tissue is affected by respiratory movement, muscle tension changes, and gravity, resulting in three-dimensional spatial displacement deviation, significantly exceeding the accuracy requirements of radiotherapy; 2. Limitations in dosimetry control: Conventional planar compensation films often produce air gaps due to their fixed shape and poor fit, resulting in dose "hot spots" and "cold areas", and the measured dose deviation is large; 3. Insufficient organ protection efficiency: The spatial positions of breast tumor target areas are close to important organs such as ribs, heart, and lungs, increasing the risk of these organs receiving excessive radiation, which may lead to side effects such as radiation-induced heart disease; 4. Weak control of secondary risks: Traditional supine radiotherapy is prone to irradiating the contralateral breast with scattered doses, increasing the potential risk of secondary tumors.

[0004] Based on the above defects, prone radiotherapy technology is currently mostly preferred. It achieves the natural separation of breast tissue from the chest wall through gravity traction, reducing the average radiation dose received by key organs such as the heart and lungs. It is particularly suitable for patients with large breast volume or left breast cancer. However, in clinical practice, the prone position technology faces two major technical bottlenecks: First, limitations of the positioning device: The existing fixation system lacks an anatomical adaptation structure, resulting in large sagittal displacement deviation of the drooping breast and large repeat positioning errors; Second, functional defects of the compensation film: Traditional planar tissue compensation films cannot be used when breast cancer patients are in the prone position. When the planar compensation film is applied to the patient's skin surface and the patient assumes a prone position, the planar film is vertically downward due to gravity and has no supporting structure, and it cannot achieve a relatively fixed positioning relationship with the patient's skin. This will cause the planar compensation film to fall off the skin, and then the air gap at the fitting part will continue to increase, failing to achieve the effect of precise positioning and tissue compensation.

[0005] In view of the above problems, it is necessary to provide a breast fixation device for the prone position. Summary of the Invention

[0006] The technical problem to be solved by the present invention is: aiming at the deficiencies existing in the prior art, to provide a customizable stereotactic device for the prone position of the breast and its manufacturing method, which can effectively improve the positioning accuracy during radiotherapy after breast cancer surgery and improve the accuracy and safety of radiotherapy.

[0007] To solve the above technical problems, the technical solution of the present invention is:

[0008] In the first aspect, the present invention provides a customizable stereotactic device for the prone position of the breast, including a fixing mechanism, a guiding mechanism, and a positioning mechanism;

[0009] The fixing mechanism includes a customizable tissue compensation film, a fixing bracket, a support base, and a first threaded column; the fixing bracket includes a customizable three-dimensional bracket and a bracket fixing plate inserted into the customizable three-dimensional bracket, the first threaded column is arranged at the bottom of the bracket fixing plate and is threadedly connected to the support base, and an adjustment knob and a height scale line are further arranged on the first threaded column; a guide rail groove is arranged at the bottom of the support base;

[0010] The guiding mechanism includes a transverse guide rail adapted to the guide rail groove, and a horizontal scale line is arranged on the transverse guide rail;

[0011] The positioning mechanism includes a bed board and two positioning seats respectively clamped on both sides of the bed board, a positioning groove is arranged on the positioning seat, and the positioning seat is inserted into both ends of the transverse guide rail through the positioning groove; a vertical scale line is also arranged on the positioning seat; the positioning mechanism further includes a rotation lock knob.

[0012] Preferably, the material of the customizable tissue compensation film is TPU, and the outer shape of the upper border of the customizable three-dimensional bracket is consistent with the local curvature of the outer surface of the customizable tissue compensation film.

[0013] Preferably, the customizable tissue compensation film is a customizable tissue compensation film, a customizable support plate is further arranged below the customizable tissue compensation film, the inner surface curvature of the customizable tissue compensation film matches the outer surface curvature of the customizable support plate, and the outer shape of the upper border of the customizable three-dimensional bracket is consistent with the local curvature of the outer surface of the customizable support plate.

[0014] Preferably, a plurality of concave slots are arranged at the upper end of the bracket fixing plate, and a plurality of positioning columns adapted to the concave slots are arranged at the bottom of the three-dimensional bracket.

[0015] Preferably, a positioning block is provided at the bottom of the positioning seat, and clamping grooves are provided on both sides of the bed board, and the positioning block is adapted to the clamping grooves.

[0016] Preferably, second threaded columns are provided at both ends of the transverse guide rail. The second threaded columns are respectively inserted into the positioning grooves to realize the assembly of the transverse guide rail and the positioning seat.

[0017] Preferably, the shape of the clamping groove is semi-circular.

[0018] In a second aspect, the present invention provides a 3D printing manufacturing method for a customizable prone breast stereotactic device, including the following steps:

[0019] (1) Obtain the patient's CT data, determine the patient's breast lesion area, extract the data of the patient's skin surface, and expand it by 0.5 - 10 cm according to the target range of the target area, and process the patient's skin data to generate a data model of a customizable tissue compensation film.

[0020] (2) According to the data model of the customizable tissue compensation film, design the construction of a three-dimensional model of the frame structure of the customizable stereotactic bracket.

[0021] (3) Transmit and import the data models of the above-mentioned customizable tissue compensation film and the customizable stereotactic bracket into the slicing software of the FDM device respectively, select TPU wire for 3D printing to obtain a customizable tissue compensation film; select PLA-CF carbon fiber wire for direct 3D printing to form a customizable stereotactic bracket.

[0022] In a third aspect, the present invention provides a 3D printing manufacturing method for a customizable prone breast stereotactic device, including the following steps:

[0023] (1) Obtain the patient's CT data, determine the patient's breast lesion area, extract the data of the patient's skin surface, and expand it by 0.5 - 10 cm according to the target range of the target area, and process the patient's skin data to generate a data model of a customizable tissue compensation film.

[0024] (2) According to the data model of the customizable tissue compensation film, design the construction of a three-dimensional model of the frame structure of the customizable stereotactic bracket.

[0025] (3) After equidistantly magnifying the data model of the above-mentioned customizable tissue compensation film and performing a shelling command, design an injection mold model that conforms to the shape of the tissue compensation film. Transmit and import the injection mold model into the slicing software of the SLA device, use epoxy photosensitive resin for mold printing production. After the mold printing is completed, assemble the molds, inject silicone, and demold after the silicone solidifies to obtain a customizable tissue compensation film.

[0026] (4) Design a three-dimensional model of a customizable support plate according to the above-mentioned injection mold model that conforms to the shape of the tissue compensation film. Transfer the three-dimensional model data of the customizable support plate into the slicing software of the SLA device, and use epoxy photosensitive resin for 3D printing to obtain the customizable support plate. Import the data model of the customizable three-dimensional bracket into the slicing software of the FDM device, and use PLA-CF carbon fiber wire for 3D printing to obtain the customizable three-dimensional bracket.

[0027] Preferably, the thickness of the customizable support plate is 1-2 mm.

[0028] Due to the adoption of the above technical solutions, the beneficial effects of the present invention are as follows:

[0029] 1. The customizable tissue compensation film of the present device is safer, more comfortable, conforms to the body surface curvature of the patient, and has high adhesion compared with the traditional flat compensation film. It is used for patients who need superficial tissue compensation irradiation, can effectively reduce the air gap, improve the skin and subcutaneous dose of the patient, and improve the uniformity and accuracy of the ray dose distribution.

[0030] 2. Through the mutual cooperation of the support base, the horizontal guide rail and the positioning seat, the present device can achieve precise positioning and adjustment of the breast lesion site of the patient in three spatial geometric positions: horizontal, vertical, and perpendicular directions. The settings of the horizontal scale line, the vertical scale line, and the height scale line provide obvious, observable, and recordable quantitative indicators for the fixed positioning of breast cancer patients, ensuring the repeatability of treatment. In addition, the present device can improve the positioning accuracy of breast tumors in the spatial geometric position during radiotherapy for breast cancer patients, thereby further reducing the positioning error and ensuring the consistency of the breast tumor position during multiple repeated radiotherapy processes.

[0031] 3. By fixing the position of the breast, ensuring the relative position of the breast tumor and the radiotherapy ray is unified, the ray can be accurately projected onto the target area each time, improving the dose accuracy of radiotherapy and the accuracy of repeated radiotherapy.

[0032] 4. Compared with the traditional breast cancer radiotherapy fixation method, the present device uses a customizable tissue compensation film, which can keep the breast fixed in the drooping state during treatment. When the breast tumor droops, it remains relatively separated from the ribs, heart, and lung organs, reducing the irradiation dose received by normal organs, reducing the risk of side effects of radiotherapy, improving the safety of radiotherapy, and the relative shape of the breast is more regular, enabling a more uniform dose distribution, ensuring that all parts of the tumor are effectively irradiated, controlling the dose deviation within a lower range, and improving the dose uniformity of radiotherapy.

[0033] 5. The structure of the present device is reasonable, the operation is simple, it can effectively improve the positioning accuracy of the breast part of breast cancer patients, and the preparation method is simple. Description of the Drawings

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0035] Figure 1 It is a three-dimensional structural schematic diagram of the device in Embodiment 1;

[0036] Figure 2 is Figure 1 an enlarged structural schematic diagram of part A in

[0037] Figure 3 It is a structural schematic diagram of the fixing bracket in Embodiment 1;

[0038] Figure 4 is Figure 3 an enlarged structural schematic diagram of part B in

[0039] Figure 5 It is a schematic diagram of the guiding mechanism in Embodiment 1;

[0040] Figure 6 It is a schematic diagram of the usage state of the device in Embodiment 1;

[0041] Figure 7 It is a schematic diagram of the fixing mechanism in Embodiment 2;

[0042] In the figure, 1, fixing mechanism; 101, customizable tissue compensation film; 102, fixing bracket; 1021, customizable three-dimensional bracket; 1022, bracket fixing plate; 1023, positioning column; 1024, slot; 103, support seat; 104, first threaded column; 105, adjusting knob; 106, height scale line; 107, guide rail groove; 108, customizable supporting plate; 2, guiding mechanism; 201, horizontal guide rail; 202, horizontal scale line; 203, second threaded column; 3, positioning mechanism; 301, bed board; 302, positioning seat; 303, positioning block; 304, card slot; 305, positioning groove; 306, vertical scale line; 307, rotary lock knob. Detailed implementation manners

[0043] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the following will further describe the solutions of the present invention. It should be noted that, without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0044] In the following description, many specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present invention, rather than all the embodiments. To further understand the present invention, the preferred embodiments of the present invention will be described below in conjunction with the embodiments, but it should be understood that these descriptions are only to further illustrate the features and advantages of the present invention, rather than a limitation on the claims of the present invention.

[0045] Embodiment 1

[0046] As Figure 1-7 shown, a customizable prone breast stereotactic device includes a fixing mechanism 1, a guiding mechanism 2 and a positioning mechanism 3;

[0047] As Figure 2-3 shown, the fixing mechanism 1 includes a customizable tissue compensation film 101, a fixing bracket 102, a support base 103 and a first threaded post 104;

[0048] The customizable tissue compensation film 101 is a TPU compensation film, which is directly 3D printed by FDM thermal melting deposition using TPU wire with a hardness of 90A - 100A. Its size, thickness, etc. can be customized according to the patient, and it is for personal use only. The inner curvature of the customizable tissue compensation film 101 is consistent with the skin curvature of the patient. It has a simple structure, a short processing time, and has a certain flexibility.

[0049] As Figure 2-3 shown, the fixing bracket 102 includes a customizable three-dimensional bracket 1021 and a bracket fixing plate 1022 inserted into the customizable three-dimensional bracket 1021. The outer shape of the upper border of the customizable three-dimensional bracket 1021 is consistent with the local curvature of the outer surface of the customizable tissue compensation film 101, which supports the customizable tissue compensation film 101 and can ensure that the positions of the customizable tissue compensation film 101 and the customizable three-dimensional bracket 1021 are consistent during repeated radiotherapy, improving the accuracy of radiotherapy.

[0050] The customizable three-dimensional bracket 1021 is integrally 3D printed. As a whole, it uses PLA-CF carbon fiber wire and is 3D printed by an FDM device. It has a simple structure and high strength. The carbon fiber material can effectively reduce the influence of ray scattering and ray attenuation on radiotherapy, and the material has no artifacts and has no adverse effect on the quality of CT scan imaging.

[0051] Four positioning posts 1023 are provided at the bottom of the customizable three-dimensional bracket 1021, and four slots 1024 are provided at the top of the bracket fixing plate 1022. The positioning posts 1023 and the slots 1024 are mutually adapted to realize the insertion of the customizable three-dimensional bracket 1021 and the bracket fixing plate 1022, which is firm and stable.

[0052] As Figure 2-3 shown jointly in FIGS. 6 and 7, the first threaded post 104 is disposed at the bottom of the bracket fixing plate 1022 and is threadedly connected to the support base 103. An adjustment knob 105 and a height scale line 106 are further provided on the first threaded post 104, facilitating the adjustment of the height of the positioning post 1023 and effectively indicating and quantifying the vertical positioning height of the patient's breast part. Specifically, after adjusting the fixing bracket 102 to an appropriate height, the value in the vertical direction of the patient at this time is recorded, providing an obvious, observable, and recordable quantitative index for the fixed positioning of breast tumor patients and ensuring the repeatability of treatment.

[0053] A guide rail groove 107 is provided at the bottom of the support base 103. The support base 103 is slidably disposed with the guide mechanism 2 through the guide rail groove 107, facilitating the adjustment of the lateral position of the fixing mechanism 1.

[0054] As Figure 3 and 4 shown, the guide mechanism 2 includes a lateral guide rail 201 adapted to the guide rail groove 107, providing positioning guidance for the lateral movement of the support base 103; a horizontal scale line 202 is provided on the lateral guide rail 201; the values in the lateral direction of the patient's fixing bracket 102 and the customizable tissue compensation film 101 can be recorded, providing an obvious, observable, and recordable quantitative index for the fixed positioning of breast tumor patients and ensuring the repeatability of treatment.

[0055] As Figure 1 and 4 shown, the positioning mechanism 3 includes a bed board 301 and two positioning seats 302 respectively clamped on both sides of the bed board 301. A positioning block 303 is provided at the bottom of the positioning seat 302, and clamping grooves 304 are provided on both sides of the bed board 301. The shape of the clamping grooves 304 is semicircular, and the positioning block 303 is adapted to the clamping grooves 304 to prevent the positioning seat 302 from moving and ensure the stability of the entire device.

[0056] Positioning grooves 305 are provided on the positioning seats 302. Second threaded posts 203 are respectively disposed at both ends of the lateral guide rail 201. The second threaded posts 203 are respectively inserted into the positioning grooves 305 to achieve the assembly of the lateral guide rail 201 and the positioning seats 302, for the guidance and fixation of the lateral guide rail 201.

[0057] Vertical scale lines 306 are further provided on the positioning seats 302, which can record the values in the vertical direction after the positioning adjustment of the patient's body position, providing an obvious, observable, and recordable quantitative index for the fixed positioning of breast tumor patients and ensuring the repeatability of treatment.

[0058] The positioning mechanism 3 further includes a rotary lock knob 307. Insert the second threaded posts 203 at both ends of the transverse guide rail 201 into the positioning grooves 305 of the positioning seat 302. After adjusting the position of the transverse guide rail 201, screw the rotary lock knob 307 into the second threaded post 203 and tighten it to lock the relative position of the transverse guide rail 201 and the positioning seat 302, preventing movement during the patient's treatment.

[0059] A 3D printing manufacturing method of a customizable prone breast stereotactic device includes the following steps:

[0060] (1) Obtain the patient's CT data, determine the breast lesion area of the patient, extract the data of the patient's skin surface, and expand it by 0.5 - 10 cm according to the target range of the target area. Process the patient's skin data to generate a data model of a customizable tissue compensation film.

[0061] (2) According to the data model of the customizable tissue compensation film, design and construct a three - dimensional model of the frame structure of the customizable stereotactic bracket.

[0062] (3) Transmit and import the data models of the above - mentioned customizable tissue compensation film and the customizable stereotactic bracket into the slicing software of the FDM device respectively. Select TPU wire for 3D printing to obtain the customizable tissue compensation film; select PLA - CF carbon fiber wire for direct 3D printing to form the customizable stereotactic bracket.

[0063] As Figure 6 shown, when the device is in use, the patient lies in a prone position on the bed board, the breast is in a natural sagging state, the inner surface of the customizable tissue compensation film fits completely with the breast, keeping the breast shape consistent during the patient's radiotherapy, which can not only achieve the effect of tissue compensation but also play a role in fixing the breast.

[0064] Embodiment 2

[0065] The difference between this embodiment and Embodiment 1 is that: the material of the customizable tissue compensation film 101 is different from that of Embodiment 1, and a customizable support plate 108 is also provided below the customizable tissue compensation film 101. The manufacturing method of the customizable tissue compensation film 101 is different from that of Embodiment 1. The differences will be described in detail below.

[0066] As Figure 7 shown, the material of the customizable tissue compensation film 101 is silica gel, which is made by pouring glue into a 3D printing mold with soft silica gel with a hardness of 10A - 30A. It is customized according to the patient and is for personal use only. The material is soft and comfortable.

[0067] Below the customizable tissue compensation film 101, there is also a customizable support plate 108. The customizable tissue compensation film 101 needs to be used in cooperation with the customizable support plate 108. The curvature of the outer surface of the customizable tissue compensation film 101 matches the curvature of the inner surface of the customizable support plate 108. The shape of the upper border of the customizable three-dimensional bracket 1021 is consistent with the local curvature of the outer surface of the customizable support plate 108.

[0068] The thickness of the customizable support plate 108 is 1-2 mm, customized according to the patient and for exclusive use by a specific person. The thinner thickness can avoid the scattering and attenuation of rays. The customizable support plate 108 is placed between the customizable three-dimensional bracket 1021 and the customizable tissue compensation film 101 to play a supporting role, which can prevent the compensation of the soft silicone material from deforming and collapsing or sliding and falling, and achieve a better fixing and positioning effect.

[0069] A 3D printing manufacturing method for a customizable prone breast stereotactic device includes the following steps:

[0070] (1) Obtain the patient's CT data, determine the breast lesion area of the patient, extract the data of the patient's skin surface, and expand it by 0.5-10 cm according to the target area range. Process the patient's skin data to generate a data model of the customizable tissue compensation film;

[0071] (2) According to the data model of the customizable tissue compensation film, design the construction of the three-dimensional model of the frame structure of the customizable three-dimensional bracket;

[0072] (3) After equally magnifying the data model of the above-mentioned customizable tissue compensation film and performing a shelling command, design an injection mold model that conforms to the shape of the tissue compensation film. Transfer and import the above-mentioned injection mold model into the slicing software of the SLA device, and use epoxy photosensitive resin to print and manufacture the mold. After the mold printing is completed, assemble the mold, inject silicone, and demold after the silicone solidifies to obtain the customizable tissue compensation film;

[0073] (4) Design the three-dimensional model of the customizable support plate according to the above-mentioned injection mold model that conforms to the shape of the tissue compensation film. Transfer the three-dimensional model data of the customizable support plate into the slicing software of the SLA device, and use epoxy photosensitive resin to perform 3D printing to obtain the customizable support plate. Import the data model of the customizable three-dimensional bracket into the slicing software of the FDM device, and use PLA-CF carbon fiber wire to perform 3D printing to obtain the customizable three-dimensional bracket.

[0074] In this article, specific examples are used to elaborate on the principles and implementation manners of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention, including the best mode, and also enables any person skilled in the art to practice the present invention, including manufacturing and using any device or system, and implementing any combined method. It should be noted that for those of ordinary skill in the art in the technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention. The protection scope of the present invention patent is defined by the claims and may include other embodiments that can be conceived by those skilled in the art. If these other embodiments have structural elements approximately the same as the literal description of the claims, or if they include equivalent structural elements that have no substantial difference from the literal description of the claims, then these other embodiments should also be included within the scope of the claims.

Claims

1. A customizable prone breast stereotactic device, characterized in that: It includes a fixing mechanism, a guiding mechanism and a positioning mechanism; The fixing mechanism comprises a customizable tissue compensation film, a fixing bracket, a support seat and a first threaded column; the fixing bracket comprises a customizable three-dimensional bracket and a bracket fixing plate plugged with the customizable three-dimensional bracket, the first threaded column is arranged at the bottom of the bracket fixing plate and is threadedly connected with the support seat, and the first threaded column is also provided with an adjustment knob and a height scale line; the bottom of the support seat is provided with a guide rail groove; The guide mechanism comprises a transverse guide rail adapted to the guide rail groove, and the transverse guide rail is provided with horizontal scale lines; The positioning mechanism includes a bed board and two positioning seats respectively clamped with the two sides of the bed board. The positioning seat is provided with a positioning groove, and the positioning seat is plugged into the two ends of the transverse guide rail through the positioning groove; the positioning seat is also provided with a vertical scale line; the positioning mechanism also includes a rotating lock button.

2. A customizable prone breast stereotactic device according to claim 1, characterized in that: The customizable tissue compensation film is a TPU compensation film, and the shape of the upper frame of the customizable three-dimensional bracket is consistent with the local curvature of the outer surface of the customizable tissue compensation film.

3. A customizable prone breast stereotactic device according to claim 1, characterized in that: The material of the customizable tissue compensation membrane is silicone, and a customizable support plate is also provided under the customizable tissue compensation membrane. The outer surface of the customizable tissue compensation membrane matches the curvature of the inner surface of the customizable support plate, and the shape of the upper frame of the customizable three-dimensional bracket is consistent with the local curvature of the outer surface of the customizable support plate.

4. A customizable prone breast stereotactic device according to claim 1, characterized in that: The upper end of the bracket fixing plate is provided with a plurality of recessed slots, and the bottom of the customizable three-dimensional bracket is provided with a plurality of positioning columns adapted to the recessed slots.

5. A customizable prone breast stereotactic device according to claim 1, characterized in that: A positioning block is provided at the bottom of the positioning seat, and clamping grooves are provided on both sides of the bed board, and the positioning block is adapted to the clamping grooves.

6. A customizable prone breast stereotactic device according to claim 1, characterized in that: The two ends of the transverse guide rail are both provided with second threaded columns, and the second threaded columns are respectively inserted into the positioning grooves to realize the assembly of the transverse guide rail and the positioning seat.

7. A customizable prone breast stereotactic device according to claim 5, characterized in that: The shape of the card slot is semicircular.

8. The 3D printing method for producing a customizable prone breast stereotactic device according to claim 2, characterized in that: The following steps are involved: (1) Obtaining the patient's CT data, determining the patient's breast lesion area, extracting data from the patient's skin surface, and expanding the target area by 0.5-10 cm according to the target range, processing the patient's skin data to generate a data model for a customizable tissue compensation membrane; (2) designing a three-dimensional model of a frame structure of a customizable three-dimensional bracket based on the data model of the customizable tissue supplement membrane; (3) importing the data model of the customizable tissue compensation membrane and the data model of the customizable three-dimensional bracket into the FDM equipment slicing software, selecting TPU wire for 3D printing, and obtaining the customizable tissue compensation membrane; PLA-CF carbon fiber filaments are selected for direct 3D printing to obtain a customizable three-dimensional bracket.

9. The 3D printing method for producing a customizable prone breast stereotactic device according to claim 3, characterized in that: The following steps are involved: (1) Obtaining the patient's CT data, determining the patient's breast lesion area, extracting data from the patient's skin surface, and expanding the target area by 0.5-10 cm according to the target range, processing the patient's skin data to generate a data model for a customizable tissue compensation membrane; (2) designing a three-dimensional model of a frame structure of a customizable three-dimensional bracket based on the data model of the customizable tissue supplement membrane; (3) isometrically enlarging the data model of the customizable tissue compensation membrane and executing a shell extraction command to design a glue injection mold model that conforms to the morphology of the tissue compensation membrane, transferring the glue injection mold model to the slicing software of the SLA device, and using epoxy photosensitive resin to print and manufacture the mold. After the mold is printed, the mold is assembled, silicone is injected, and the mold is removed after the silicone solidifies to obtain the customizable tissue compensation membrane; (4) Design a three-dimensional model of a customizable support plate based on the above-mentioned injection mold model that conforms to the morphology of the tissue compensation membrane, transfer the three-dimensional model of the customizable support plate into the SLA equipment slicing software, use epoxy photosensitive resin for 3D printing to obtain a customizable support frame, import the data model data of the customizable three-dimensional bracket into the FDM equipment slicing software, use PLA-CF carbon fiber filament for 3D printing, and obtain the customizable three-dimensional bracket.

10. The 3D printing method for producing a customizable prone breast stereotactic device according to claim 9, characterized in that: The thickness of the customizable support plate is 1-2 mm.

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