Puncture needle and automatic particle implantation system using same

Abstract

Disclosed in the present invention are a puncture needle and an automatic particle implantation system using the same. The automatic particle implantation system comprises a controller, an angle adjustment apparatus, and a puncture needle assembly. The angle adjustment apparatus is electrically connected to the controller, the puncture needle assembly is mounted on the angle adjustment apparatus, and the puncture needle assembly comprises a puncture needle. The controller is used for controlling the angle adjustment apparatus to adjust a puncture angle of the puncture needle assembly, and the controller is further used for controlling a particle gun to pass through a septum of the puncture needle to enter the puncture needle to implant radioactive particles, and when the particle gun exits, the septum automatically blocks a wide-diameter section of a needle seat, so as to allow the particle gun to implant radioactive particles again. By means of the precise angle adjustment and the special structural design of the puncture needle, the present invention achieves precise positioning of the puncture needle assembly, thereby significantly improving the efficiency and safety of surgery.

Description

Puncture needle and automatic particle implantation system using the same TECHNICAL FIELD

[0001] The present application relates to a puncture needle, and also relates to an automatic particle implantation system using the same, and belongs to the technical field of medical devices. BACKGROUND

[0002] Radioactive particle implantation therapy is an advanced medical technology widely used in the treatment of advanced lung cancer, prostate cancer, liver cancer and other tumors. This technology destroys tumor cells by implanting radioactive sources (the core is radioactive particles) into the tumor and using their radioactivity. Currently, the commonly used radioactive particle is iodine 125, which has a short half-life (59.6 days) and a limited radiation penetration distance (1.7 cm), which can effectively kill tumor cells without damaging surrounding normal tissues, thereby improving local control rate and long-term treatment rate.

[0003] However, when performing radioactive particle implantation therapy, the existing puncture needle has the problem of negative pressure backflow. This phenomenon occurs during the puncture process when the human body, the puncture needle and the outside form a channel. Negative pressure can cause blood backflow, which may contaminate the implantation device and risk ejecting the particles out of the needle tube. This not only increases the complexity of the operation, but also poses a challenge to the safety and effectiveness of the operation.

[0004] In order to overcome these difficulties and improve the accuracy and safety of the operation, a new type of surgical device needs to be developed. This device should be able to accurately puncture to the lesion area according to the planned path under CT guidance, reducing the dependence on the experience and operation of the doctor. The traditional puncture operation process is relatively cumbersome, including image scanning, grid arrangement, pre-puncture and other steps, and the doctor needs to frequently enter and exit the operating room, which undoubtedly increases the physical burden on the doctor and the patient. Therefore, a new type of surgical device that can simplify the surgical process and improve efficiency is crucial to improving treatment effectiveness and reducing the burden on doctors and patients. SUMMARY

[0005] The primary technical problem to be solved by the present application is to provide a puncture needle.

[0006] Another technical problem to be solved by the present application is to provide an automatic particle implantation system using the puncture needle.

[0007] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0008] According to a first aspect of an embodiment of the present application, a puncture needle is provided, comprising:

[0009] a needle seat having a hollow inner cavity, the hollow inner cavity comprising a wide diameter section, a transition section and a narrow diameter section connected in sequence;

[0010] a needle head disposed on the needle seat and penetrating into the narrow diameter section of the hollow inner cavity;

[0011] wherein a diaphragm mounting groove is formed on the inner wall of the wide diameter section, and a diaphragm is disposed in the diaphragm mounting groove for preventing the to-be-loaded particles from escaping from the puncture needle; and a strip-shaped scratch for delivering particles is formed on the diaphragm.

[0012] Preferably, a limiting clamping jaw is disposed at one end of the transition section close to the narrow diameter section, and the end face of the limiting clamping jaw away from the needle head has a diameter smaller than that of the to-be-loaded particles, so as to prevent the to-be-loaded particles from escaping from the puncture needle.

[0013] According to a second aspect of the embodiment of the present application, an automatic particle implantation system is provided, comprising a controller, an angle adjusting device and a puncture needle assembly;

[0014] The angle adjusting device is electrically connected with the controller, and the puncture needle assembly is installed on the angle adjusting device, and the puncture needle assembly comprises the puncture needle described above;

[0015] The controller is configured to control the angle adjusting device to adjust the puncture angle of the puncture needle assembly, and the controller is further configured to control a particle gun to implant radioactive particles into the puncture needle through the diaphragm, and the particle gun is sealed by the diaphragm after exiting from the wide diameter section of the needle seat, so as to implant radioactive particles again by the particle gun.

[0016] Preferably, the angle adjusting device further comprises:

[0017] an angle disc, a surface of the angle disc being provided with an annular guide rail around a central axis of the angle disc, and an arc-shaped sliding block being slidingly fitted on the annular guide rail;

[0018] a linear sliding rail being disposed on the arc-shaped sliding block, and a length direction of the linear sliding rail passing through the central axis of the angle disc, and a linear sliding block being slidingly fitted on the linear sliding rail;

[0019] a first rotating part being rotatably installed on the linear sliding block around a first direction, the first direction being perpendicular to a preset plane formed by the length direction of the linear sliding rail and the central axis of the angle disc;

[0020] a second rotating part being rotatably installed on the first rotating part around a second direction, the second direction being always perpendicular to the first direction and located in the preset plane; and the puncture needle assembly being disposed on the second rotating part for implanting radioactive particles;

[0021] The sliding fit of the straight line slide rail and the straight line slide block is used for adjusting the puncture position of the puncture needle assembly; the sliding fit of the annular guide rail and the arc-shaped slide block is used for adjusting the first puncture angle of the puncture needle assembly; the rotating fit of the first rotating part and the straight line slide block is used for adjusting the second puncture angle of the puncture needle assembly; the rotating fit of the second rotating part and the first rotating part is used for adjusting the third puncture angle of the puncture needle assembly; the puncture position, the first puncture angle, the second puncture angle and the third puncture angle of the puncture needle assembly jointly determine the positioning accuracy of the puncture needle assembly.

[0022] Preferably, the first rotating part further comprises:

[0023] A fixed plate is fixed on the straight line slide block, and the length direction of the fixed plate is parallel to the central axis of the angle disc;

[0024] An active plate is rotatably connected to the fixed plate around the first direction, and a plurality of connecting holes are formed on the active plate along the length direction;

[0025] A diagonal brace is fixedly connected to the fixed plate at a first end and connected to any one of the connecting holes at a second end, so as to adjust the included angle between the fixed plate and the active plate by replacing different connecting holes.

[0026] Preferably, the second rotating part further comprises:

[0027] An angle plate is arranged at the end of the active plate away from the fixed plate, and the angle plate is perpendicular to the active plate;

[0028] A rotating fixed part is rotatably installed on the angle plate around the second direction, and is used for being connected with the puncture needle assembly.

[0029] Preferably, the angle disc has a first scale for indicating the first puncture angle of the puncture needle assembly;

[0030] The connecting hole has a second scale for indicating the second puncture angle of the puncture needle assembly;

[0031] The angle plate has a third scale for indicating the third puncture angle of the puncture needle assembly.

[0032] Preferably, the first rotating part further comprises:

[0033] A fixed plate is fixed on the straight line slide block, and the length direction of the fixed plate is parallel to the central axis of the angle disc;

[0034] An active plate is rotatably connected to the fixed plate around the first direction,

[0035] a telescopic inclined support, a first end of which is connected to the fixed plate, and a second end of which is connected to the movable plate;

[0036] wherein the telescopic inclined support is telescopic in length direction to drive the movable plate to rotate relative to the fixed plate in the first direction.

[0037] wherein preferably, the puncture needle assembly further comprises:

[0038] a needle advancing and retracting module, which is installed on the rotating fixed part and rotates with the rotating fixed part, and is used for advancing or retracting the puncture needle;

[0039] a clamping part, which is arranged on the needle advancing and retracting module and is used for clamping and fixing the puncture needle.

[0040] wherein preferably, the automatic particle implantation system further comprises a support, which is supported on the bottom of the angle disc and is arranged above the human body.

[0041] Compared with the prior art, the puncture needle and the automatic particle implantation system using the puncture needle provided by the present application realize accurate positioning of the puncture needle assembly through precise angle adjustment and special structure design of the puncture needle, significantly improve the efficiency and safety of the operation. The system automatically adjusts the puncture angle through the controller, effectively prevents the particles from being pushed out under negative pressure by using the double mechanism of the diaphragm and the limiting clamping jaw, reduces the operation burden of the doctor, and at the same time guarantees the stability of the operation process. In addition, the present application is not limited to radioactive particle implantation treatment, but also has wide applicability, and can serve various puncture technology fields such as puncture biopsy, microwave ablation, radiofrequency ablation, and cryoablation. BRIEF DESCRIPTION OF DRAWINGS

[0042] FIG. 1 is a cross-sectional view of a puncture needle according to an embodiment of the present application;

[0043] FIG. 2 is a structural view of a diaphragm according to an embodiment of the present application;

[0044] FIG. 3A is a structural view of an automatic particle implantation system according to an embodiment of the present application;

[0045] [Corrected according to Rule 26 on 12.11.2025] FIG. 3B is a structural view of an automatic particle implantation system according to an embodiment of the present application, in which the controller and the particle gun are omitted;

[0046] [Corrected according to Rule 26 on 12.11.2025] FIG. 4 is a top view of the structure shown in FIG. 3B;

[0047] [Corrected according to Rule 26 on 12.11.2025] FIG. 5 is a side view of the structure shown in FIG. 3B;

[0048] Fig. 6 is a schematic diagram of third puncture angle adjustment of the puncture needle assembly by the second rotating part;

[0049] Fig. 7 is a structural schematic diagram of another automatic particle implantation system provided by the second embodiment of the present application. DETAILED DESCRIPTION

[0050] The technical content of the present application will be described in detail below in combination with the drawings and specific embodiments.

[0051] The embodiments of the present application provide a puncture needle and an automatic particle implantation system using the same. The multi-angle adjustment of the puncture needle assembly is achieved by the sliding cooperation or rotating cooperation between the components, thereby improving the positioning accuracy of the puncture needle assembly. In addition, the special structure of the puncture needle prevents the particles to be loaded from being separated from the puncture needle, which effectively prevents the particles from being ejected during the implantation of the particles, and increases the safety and reliability of the operation.

[0052] First embodiment

[0053] As shown in Figs. 1 and 2, a puncture needle 83 provided by the first embodiment of the present application includes a needle seat 831 and a needle head 832. The needle seat 831 is made of medical PC material. The needle seat 831 has a hollow inner cavity 830 therein, which includes a wide diameter section 801, a transition section 802 and a narrow diameter section 803 connected in sequence. The needle head 832 is made of stainless steel material, is arranged on the needle seat 831 and is arranged in the narrow diameter section 803 of the hollow inner cavity.

[0054] Specifically, in the present embodiment, one end of the transition section 802 close to the narrow diameter section 803 (i.e., the right end of the narrow diameter section 803 in Fig. 1) is provided with a limiting clamping jaw 833. The end face of the one end of the limiting clamping jaw 833 away from the needle head 832 has a diameter smaller than that of the particles to be loaded 10, so as to prevent the particles to be loaded 10 from being separated from the puncture needle, thereby increasing the safety and reliability of the operation. Generally, the diameter of the particles to be loaded 10 is about 0.8 mm, so it is only necessary to ensure that the diameter of the end face of the one end of the limiting clamping jaw 833 away from the needle head 832 is smaller than 0.8 mm. In other application scenarios, the diameter of the end face of the one end of the limiting clamping jaw 833 away from the needle head 832 can be adjusted according to different particles to be loaded.

[0055] In addition, in the above embodiment, preferably, a diaphragm mounting groove 8011 is formed in the inner wall of the wide diameter section 801, the diaphragm 834 is arranged in the diaphragm mounting groove 8011, and a strip-shaped scratch 8341 for delivering particles is formed in the diaphragm 834. It can be understood that the diaphragm 834 can further prevent the particles to be loaded from being separated from the puncture needle, thereby playing a double protection role with the limiting clamping jaw 833, and effectively preventing the particles from being pushed out by the negative pressure, while the needle core of the particle gun 20 can smoothly enter and exit to achieve particle delivery.

[0056] Second embodiment

[0057] As shown in FIG. 3A, the second embodiment of the present application provides an automatic particle implantation system, which comprises a controller 100, an angle adjusting device 200 and a puncture needle assembly 8. The angle adjusting device 200 is electrically connected with the controller 100, and the puncture needle assembly 8 is installed on the angle adjusting device 200, and the puncture needle assembly 8 comprises the puncture needle 83 in the first embodiment. Specifically, the controller 100 is used to control the angle adjusting device 200 to adjust the puncture angle of the puncture needle assembly 8, and the controller 100 is also used to control the particle gun 20 to enter the puncture needle through the diaphragm 834 to implant radioactive particles. Moreover, after the particle gun 20 exits, the diaphragm 834 automatically blocks the wide diameter section 801 of the needle seat 821 (without the need for the doctor to block the opening end of the needle seat 831 by using a finger), so as to implant radioactive particles again by the particle gun 20, thereby realizing an automatic particle implantation process.

[0058] In the present embodiment, the controller 100 can be implemented by a PLC logic controller or a single-chip microcomputer, which is not specifically described herein.

[0059] As shown in FIG. 3, in the present embodiment, the angle adjusting device 200 comprises an angle disc 1, an annular guide rail 2, an arc-shaped sliding block 3, a straight-line sliding rail 4, a straight-line sliding block 5, a first rotating part 6 and a second rotating part 7. The surface of the angle disc 1 is mounted with the slidingly matched annular guide rail 2 and arc-shaped sliding block 3, which are used to adjust the first puncture angle of the puncture needle assembly 8. The arc-shaped sliding block 3 is mounted with the slidingly matched straight-line sliding rail 4 and straight-line sliding block 5, which are used to adjust the puncture position of the puncture needle assembly 8. The first rotating part 6 is rotatably mounted on the straight-line sliding block 5, which is used to adjust the second puncture angle of the puncture needle assembly 8. The second rotating part 7 is rotatably mounted on the first rotating part 6, which is used to adjust the third puncture angle of the puncture needle assembly 8. Thus, by adjusting the puncture position, the first puncture angle, the second puncture angle and the third puncture angle of the puncture needle assembly 8, the precise positioning of the puncture needle assembly 8 is realized.

[0060] Specifically, in the embodiment, the angle disc 1 is a ring-shaped plate (only an example, which can be flexibly adjusted according to actual needs in other embodiments). The surface (i.e., the X-Y plane) of the angle disc 1 is provided with a ring-shaped guide rail 2 around the central axis (parallel to the Z direction) of the angle disc 1, and the arc-shaped slider 3 is slidingly fitted on the ring-shaped guide rail 2, so as to adjust the angle of the arc-shaped slider 3 on the ring-shaped guide rail 2.

[0061] As shown in FIG. 4, in the embodiment, since the puncture needle assembly 8 is connected with the arc-shaped slider 3 through multiple components, the first puncture angle adjustment of the puncture needle assembly 8 in the plane of the angle disc 1 can be realized by the sliding cooperation of the arc-shaped slider 3 and the ring-shaped guide rail 2 (as shown by the arc-shaped double-headed arrow in FIG. 4).

[0062] As shown in FIG. 3, in the embodiment, the linear slide rail 4 is arranged on the arc-shaped slider 3, and the length direction of the linear slide rail 4 passes through the central axis of the angle disc 1 (i.e., the length direction of the linear slide rail 4 is the radial direction of the angle disc 1). Correspondingly, the linear slide block 5 is slidingly fitted on the linear slide rail 4, and the linear slide block 5 can reciprocate along the linear slide rail 4, so as to adjust the position of the puncture needle assembly 8 in the radial direction of the angle disc 1 (as shown by the linear double-headed arrow in FIG. 4), thereby realizing the adjustment of the puncture position.

[0063] As shown in FIG. 3, in the embodiment, the first rotating part 6 is rotatably installed on the linear slide block 5 in a first direction, which is perpendicular to a preset plane formed by the length direction of the linear slide rail 4 and the central axis of the angle disc 1. It can be understood that since the length direction of the linear slide rail 4 will change with the sliding of the arc-shaped slider 3 on the ring-shaped guide rail 2, the angle between the first direction and the preset plane will also change, but the preset plane will always be perpendicular to the surface of the angle disc 1 and pass through the central axis of the angle disc 1, and correspondingly, the first direction will always be perpendicular to the preset plane. For example, in FIG. 3, when the length direction of the linear slide rail 4 is parallel to the Y direction, the preset plane is parallel to the Y-Z plane, and as the angle of the linear slide rail 4 continuously changes, the preset plane forms an angle of 0-180° with the Y-Z plane.

[0064] As shown in FIG. 3 and FIG. 5, in the present embodiment, the first rotating part 6 comprises a fixed plate 61, a movable plate 62 and a diagonal brace 63. The fixed plate 61 is a vertical plate fixed on the linear slide 5, and the length direction of the fixed plate 61 is parallel to the central axis of the angle disc 1. The movable plate 62 is a horizontal plate rotatably connected to the fixed plate 61 in the first direction, and a plurality of connecting holes 621 are formed in the movable plate 62 along the length direction thereof. The diagonal brace 63 is obliquely arranged between the fixed plate 61 and the movable plate 62, and the first end of the diagonal brace 63 is fixedly connected to the fixed plate 61, and the second end of the diagonal brace 63 is connected to any one of the connecting holes 621. Therefore, when the second end of the diagonal brace 63 is connected to different connecting holes 621, the included angle between the fixed plate 61 and the movable plate 62 is different, so that the movable plate 62 is adjusted in rotation by replacing different connecting holes 621 (as shown by the arc-shaped double-headed arrow in FIG. 5), and the second puncture angle of the puncture needle assembly 8 is adjusted in the preset plane.

[0065] In addition, in another embodiment, the diagonal brace 63 of the first rotating part 6 can be arranged as a telescopic diagonal brace, and the connecting holes 621 do not need to be formed in the movable plate 62. Specifically, the telescopic diagonal brace 63 is connected between the fixed plate 61 and the movable plate 62, and the telescopic diagonal brace 63 can move in the length direction thereof in extension and contraction, so as to drive the movable plate 62 to rotate relative to the fixed plate 61 in the first direction. It can be understood that when the diagonal brace 63 is arranged as a telescopic diagonal brace, the adjustable range of the movable plate 62 is larger, and the adjustment of 0-180° in the preset plane can be realized.

[0066] As shown in FIG. 3, the second rotating part 7 is rotatably mounted on the first rotating part 6 in the second direction, which is always perpendicular to the first direction and located in the preset plane. In the present embodiment, the second direction is the length direction of the movable plate 62. It can be understood that with the rotation of the movable plate 62 relative to the fixed plate 61, the second direction is continuously adjusted in angle in the preset plane, but the second direction is always perpendicular to the first direction.

[0067] As shown in FIG. 6, the second rotating part 7 comprises an angle plate 71 and a rotating fixing part 72. The angle plate 71 is a semicircular plate arranged at the end of the movable plate 62 away from the fixed plate 61, and the angle plate 71 is perpendicular to the movable plate 62. The rotating fixing part 72 is rotatably mounted on the angle plate 71 in the second direction, and is used to connect with the puncture needle assembly 8. In the embodiment, the rotating center of the rotating fixing part 72 is located at the center of the semicircular plate, and the rotating fixing part 72 can rotate around the center of the semicircular plate within 0-180° and be fixed at any angle, so as to adjust the third puncture angle of the puncture needle assembly 8 in the plane where the angle plate 71 is located. The specific structure of the rotating fixing part 72 is not limited here, and can be selected as needed, for example, through the cooperation of rotating blocks and positioning bolts, or through gear meshing.

[0068] As shown in FIGS. 3 and 6, in the embodiment, the puncture needle assembly 8 is arranged on the rotating fixing part 72 of the second rotating part 7, and is used to implant radioactive particles. Specifically, the puncture needle assembly 8 comprises a needle advancing and retreating module 81, a clamping part 82 and a puncture needle 83. The needle advancing and retreating module 81 is mounted on the rotating fixing part 72 and rotates with the rotating fixing part 72, and is used to manually and uniformly retreat the needle to implant radioactive particles according to the implantation dose of radioactive particles, so as to ensure that the distances between the implanted radioactive particles are equal and the optimization of the radiation dose is achieved. The needle advancing and retreating module 81 has a scale, which can be used to observe the depth of the needle in real time, so as to meet the accuracy of the internal radiotherapy. The clamping part 82 is arranged on the needle advancing and retreating module 81, and is used to clamp and fix the puncture needle 83. The puncture needle 83 is mounted on the clamping part 82, and is used to implant radioactive particles. The puncture needle 83 is the puncture needle in the first embodiment, and will not be described here.

[0069] In addition, in the above embodiment, preferably, the angle disc 1 has a first scale of 0-360°, which is used to indicate the first puncture angle of the puncture needle assembly 8. The connecting hole 621 has a second scale of 0-90°, which is used to indicate the second puncture angle of the puncture needle assembly 8. The angle plate 62 has a third scale of 0-180°, which is used to indicate the third puncture angle of the puncture needle assembly 8.

[0070] In the above embodiment, preferably, the automatic particle implantation system further comprises a guard plate 9, the top of the guard plate 9 is recessed inward to form a recessed part 91, and the angle disc 1 is supported on the top of the guard plate 9 and located above the recessed part 91. In the embodiment, the recessed part 91 of the guard plate 9 can make the patient lie on the guard plate 9, so that the puncture point can be reached at any part of the tumor by adjusting the puncture angle of the puncture mechanism.

[0071] As shown in FIG. 7, in the above-mentioned embodiments, preferably, the automatic particle implantation system further comprises a support 30 supported at the bottom of the angle disc 1 for being erected above the human body. It can be understood that when particle implantation is needed, the support 30 can be directly erected above the human body and fixed after the patient lies down, and the support 30 can be removed after puncture is completed, which can adapt to different types of sickbeds and is very convenient to use. In addition, more preferably, the support 30 is adjustable in height (the specific lifting structure is not specifically limited here and can be flexibly selected according to actual needs), so that the height can be adaptively adjusted according to the body type of different patients to ensure the particle puncture effect.

[0072] In addition, it can be understood that the automatic particle implantation system in the embodiments of the present application can be applied not only to the field of radioactive particle implantation therapy but also to the fields of puncture biopsy, microwave ablation, radiofrequency ablation, cryoablation and other puncture technologies.

[0073] Compared with the prior art, the puncture needle and the automatic particle implantation system applying the same provided by the present application realize accurate positioning of the puncture needle assembly through precise angle adjustment and special structural design of the puncture needle, significantly improving the efficiency and safety of the operation. The system automatically adjusts the puncture angle through the controller and effectively prevents the particles from being pushed out under negative pressure by using the double mechanism of the diaphragm and the limiting clamping jaw, reduces the operation burden of the doctor and guarantees the stability of the operation process.

[0074] It should be noted that the above-mentioned embodiments are only illustrative. The technical solutions of various embodiments can be combined, which are all within the protection scope of the present application.

[0075] It should be understood that the terms “depth”, “upper”, “lower”, “horizontal” and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0076] In addition, the terms “first” and “second” are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by “first” and “second” can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of “multiple” is two or more, unless otherwise specifically limited.

[0077] The puncture needle and the automatic particle implantation system using the puncture needle are described in detail above. Any obvious modification made by those skilled in the art without departing from the essential content of the present application will constitute an infringement of the patent right of the present application and will bear the corresponding legal responsibility.

Claims

1. A puncture needle characterized by The application relates to a puncture needle. The puncture needle comprises a needle seat and a needle head. The needle seat has a hollow inner cavity, which comprises a wide-diameter section, a transition section and a narrow-diameter section connected in sequence. The needle head is arranged on the needle seat and penetrates into the narrow-diameter section of the hollow inner cavity. A diaphragm mounting groove is arranged on the inner wall of the wide-diameter section. A diaphragm is arranged in the diaphragm mounting groove.

3. An automated particle implantation system characterized by The diaphragm is used to prevent the particles to be loaded from escaping from the puncture needle. A strip-shaped scratch for delivering particles is arranged on the diaphragm.

2. The puncture needle according to claim 1, wherein:

4. The automated particle implant system of claim 3, wherein A limiting clamping jaw is arranged on the end of the transition section close to the narrow-diameter section. The end face of the limiting clamping jaw away from the needle head has a diameter smaller than that of the particles to be loaded. The diameter of the end face of the limiting clamping jaw away from the needle head is smaller than that of the particles to be loaded. The application relates to a puncture needle assembly. The puncture needle assembly comprises a controller, an angle adjusting device and a puncture needle. The angle adjusting device is electrically connected with the controller.

5. The automated particle implant system of claim 4, wherein The puncture needle is arranged on the angle adjusting device. The controller is used for controlling the angle adjusting device to adjust the puncture angle of the puncture needle. The controller is also used for controlling a particle gun to implant radioactive particles into the puncture needle through the diaphragm. The particle gun is withdrawn and the wide-diameter section of the needle seat is blocked by the diaphragm. The particle gun is used for implanting radioactive particles again. The angle adjusting device comprises an angle disc, a linear slide rail and a linear slide block. An annular guide rail is arranged on the surface of the angle disc around the central axis of the angle disc. An arc-shaped slide block is slidably arranged on the annular guide rail. The linear slide rail is arranged on the arc-shaped slide block. The length direction of the linear slide rail passes through the central axis of the angle disc. A linear slide block is slidably arranged on the linear slide rail. A first rotating part is rotatably arranged on the linear slide block around a first direction. The first direction is perpendicular to the length direction of the linear slide rail and the central axis of the angle disc. A second rotating part is rotatably arranged on the first rotating part around a second direction. The second direction is always perpendicular to the first direction and is located in a preset plane. The puncture needle is arranged on the second rotating part and is used for implanting radioactive particles. The sliding cooperation between the linear slide rail and the linear slide block is used for adjusting the puncture position of the puncture needle. The sliding cooperation between the annular guide rail and the arc-shaped slide block is used for adjusting the first puncture angle of the puncture needle. The rotating cooperation between the first rotating part and the linear slide block is used for adjusting the second puncture angle of the puncture needle. The rotating cooperation between the second rotating part and the first rotating part is used for adjusting the third puncture angle of the puncture needle. The puncture position, the first puncture angle, the second puncture angle and the third puncture angle of the puncture needle determine the positioning accuracy of the puncture needle. The first rotating part comprises a fixed plate and a movable plate. The fixed plate is fixed on the linear slide block and the length direction of the fixed plate is parallel to the central axis of the angle disc. The movable plate is rotatably connected to the fixed plate around the first direction. A plurality of connecting holes are arranged on the movable plate along the length direction. The application relates to a puncture needle. A diagonal brace has a first end fixedly connected to the fixed plate and a second end connected to any one of the connection holes, so as to adjust the included angle between the fixed plate and the movable plate by replacing different connection holes.

6. The automated particle implant system of claim 5, wherein The second rotating part further comprises: An angle plate is arranged at an end of the movable plate away from the fixed plate, and the angle plate is perpendicular to the movable plate; A rotating fixing part is rotatably mounted on the angle plate in the second direction and is used to be connected with the puncture needle assembly.

7. The automated particle implantation system of claim 6, wherein: The angle plate has a first scale for indicating a first puncture angle of the puncture needle assembly; The connection hole has a second scale for indicating a second puncture angle of the puncture needle assembly; The angle plate has a third scale for indicating a third puncture angle of the puncture needle assembly.

8. The automated particle implant system of claim 4, wherein The first rotating part further comprises: A fixed plate is fixed on the linear slide, and the length direction of the fixed plate is parallel to the central axis of the angle plate; A movable plate is rotatably connected to the fixed plate in the first direction; A telescopic diagonal brace has a first end connected to the fixed plate and a second end connected to the movable plate; The telescopic diagonal brace can move along its length direction to drive the movable plate to rotate relative to the fixed plate in the first direction.

9. The automated particle implant system of claim 6, wherein The puncture needle assembly further comprises: A needle advancing and retreating module is mounted on the rotating fixing part and rotates with the rotating fixing part, and is used to advance or retreat the needle; A clamping part is arranged on the needle advancing and retreating module and is used to clamp and fix the puncture needle.

10. The automated particle implant system of claim 4, wherein Further comprising a support; The support is supported on the bottom of the angle plate and is arranged above the human body.

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