A self-anchoring image tracking marker and an implantation device therefor

Abstract

The utility model relates to radiotherapy mark technical field. A kind of self-anchoring image tracking marker, including a marker, marker includes a main marker and the anchoring structure of radially outward deformation expansion;When main marker is provided with one, the axial tail end of main marker is connected helix or at least two circumferential arrangement's line rope structure, to helix or line rope structure as anchoring structure.When main marker is provided with at least two, main marker includes at least two circumferential arrangement or axial arrangement's sub-marker, adjacent sub-marker is connected by anchoring structure, and anchoring structure is connected by deformation adjustment length included angle of adjacent sub-marker.The utility model structure is optimized by marker, and marker is convenient for through anchoring structure, improve anchoring effect, not easy to shift, simultaneously, can deformation expansion its area area of development.

Description

Technical Field

[0001] This utility model relates to the field of radiotherapy markers, specifically markers and their implantation devices. Background Technology

[0002] Traditional stereotactic radiotherapy techniques, such as Gamma Knife, typically rely on surface markers or external fixation devices to locate the radiation field. This method has inherent errors, especially when the patient moves slightly, potentially causing deviation from the radiation field, reducing treatment effectiveness, and possibly causing unnecessary damage. Currently, CyberKnife, a new type of stereotactic radiotherapy device, has emerged. CyberKnife is a synchronous radiotherapy device capable of real-time three-dimensional tracking of tumor location. It is currently the world's most advanced whole-body three-dimensional radiosurgery device. Its real-time target tracking is achieved through its built-in CT (Computed Tomography) positioning system, tracking the tumor location once per second and precisely adjusting the position and angle of the radiotherapy head based on the tracked location information. This allows for stereotactic radiotherapy with an accuracy within 1mm. To further enhance tumor location tracking, certain tumors with specific characteristics or locations (such as liver tumors and prostate tumors) often require percutaneous implantation of CT-sensitive markers, such as metal tracking markers (gold markers), to help the device achieve precise tumor location tracking.

[0003] Currently used markers have the following drawbacks:

[0004] The shape of the marker cannot change, so its anchoring effect in vivo is not guaranteed, and it is prone to displacement. Because the development area of ​​a single marker is small, it is not easily recognized by the equipment at certain imaging angles, resulting in poor marking effect.

[0005] Currently used human radiotherapy tracking marker implantation devices have the following drawbacks:

[0006] For example, a stereotactic radiotherapy tracking marker implantation device disclosed in CN203138573U cannot achieve rapid and convenient loading of gold markers. The loading direction and the ejection direction of the gold markers are set perpendicularly. If the gold markers are not loaded in place, it will cause the gold markers to get stuck during ejection. Utility Model Content

[0007] In view of the problems existing in the prior art, this utility model provides a self-anchored image tracking marker and its implantation device to solve at least one of the above technical problems.

[0008] To achieve the above objectives, this utility model provides a self-anchored image tracking marker, comprising a marker element, characterized in that the marker element comprises a main marker and an anchoring structure;

[0009] When there is one main marker, the axial tail end of the main marker is connected to a radially outward deformable spiral or at least two circumferentially arranged rope structures, with the spiral or rope structures serving as the anchoring structure.

[0010] When there are at least two main markers, each main marker includes at least two sub-markers arranged circumferentially or axially. Adjacent sub-markers are connected by the anchoring structure, and the anchoring structure adjusts the length angle between adjacent sub-markers by deformation.

[0011] This invention optimizes the structure of the marker, making it easier for the marker to pass through the anchoring structure, improving the anchoring effect, and preventing it from easily shifting. At the same time, it can deform and expand the area of ​​its development.

[0012] More preferably, the main marker is a pure gold component; when there is only one main marker, the spiral component is a nickel-titanium shape memory alloy.

[0013] When at least two main markers are provided, the anchoring structure is a nickel-titanium shape memory alloy.

[0014] More preferably, when the sub-markers are circumferentially arranged circumferential sub-markers, the cross-section of the circumferential sub-markers is a fan-shaped structure;

[0015] The anchoring structure includes elastic claws that match the number of circumferential sub-markers. All elastic claws are arranged circumferentially, and one end of each elastic claw is connected to the axial tail end of the circumferential sub-marker. The other ends of all elastic claws are fixedly connected.

[0016] More preferably, when there are two circumferential sub-markers, there are two elastic claws, and the two elastic claws are connected to form a U-shape or a V-shape.

[0017] More preferably, the axial head end of the circumferential sub-marker is a tapered structure with a cross-section that increases from front to back along the axial direction.

[0018] More preferably, when the main marker is an axially arranged sub-marker, the anchoring structure includes a first connecting segment, a first angle adjusting segment, an intermediate connecting segment, a second angle adjusting segment, and a second connecting segment connected in sequence.

[0019] The first connecting segment and the second connecting segment are respectively connected to the axial tail ends of adjacent axial sub-markers.

[0020] It facilitates deformation and expansion through angle changes in the first and second angle adjustment sections.

[0021] More preferably, the intermediate connecting section is a U-shaped structure, which is disposed on the periphery of any axial sub-marker, with the two ends of the U-shaped structure located on both sides of the axial sub-marker.

[0022] More preferably, the cord structure is a woolen yarn.

[0023] The cord structure is used to increase friction and prevent the marker from shifting.

[0024] More preferably, the spiral component is a conical spiral structure with an outer diameter that increases along the axial direction as it expands and deforms.

[0025] An implantation device for a self-anchored image tracking marker, comprising the aforementioned self-anchored image tracking marker, including an inner needle core and an outer needle sheath disposed inside and outside, characterized in that it further comprises a loading member, wherein the loading member has an axially penetrating loading hole, and the marker is installed in the loading hole and is axially ejected from the loading hole;

[0026] The outer needle sheath includes an outer needle tube and an outer needle seat arranged axially from front to back, and the outer needle seat has a mounting groove for axially inserting the filling component.

[0027] When the filling component is installed in the mounting groove, the filling hole is directly opposite the inner hole of the outer needle tube;

[0028] The inner needle core includes an inner needle body and an inner needle seat arranged axially from front to back. A limiting member is connected to the front end of the inner needle seat, and a lateral clearance groove for embedding the inner needle core is provided on the limiting member.

[0029] When the limiting member is turned outward, the outer needle seat abuts against the inner needle seat;

[0030] When the limiting member is sleeved on the body of the inner needle, the limiting member is located between the outer needle seat and the inner needle seat.

[0031] A thin film is fixed to the rear opening of the mounting groove, and a cross-shaped slit is formed in the center of the film. The cross-shaped slit in the film provides a sealing effect when the inner needle core is withdrawn from the outer needle sheath, reducing the risk of pneumothorax.

[0032] Compared with the prior art, the beneficial effects of this utility model are:

[0033] 1. This utility model optimizes the structure of the marker, making it easier for the marker to pass through the anchoring structure, improving the anchoring effect, making it less prone to displacement, and at the same time, it can deform and expand its development area.

[0034] 2. This utility model uses an axial filling structure for the filling component, which facilitates rapid filling and ensures high installation stability.

[0035] 3. This utility model connects a limiting component to the inner needle seat, which facilitates the relative positioning of the inner needle core and the outer needle sheath, and avoids the marking component from being accidentally extended during puncture. The device simplifies operation through the connection of the integrated limiting component.

[0036] 4. This utility model has a thin film with a cross-shaped slit installed on the outer needle sheath. When the inner needle core is withdrawn from the outer needle sheath, it can achieve a certain sealing effect and reduce the risk of pneumothorax. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of a specific embodiment 1 of the present utility model;

[0038] Figure 2 This is a specific embodiment 1 of the present utility model. Figure 1 A structural diagram from another perspective;

[0039] Figure 3 This is a schematic diagram of the structure in the expanded state of a specific embodiment 1 of this utility model;

[0040] Figure 4 This is a specific embodiment 1 of the present utility model. Figure 3 A structural diagram from another perspective;

[0041] Figure 5 This is a schematic diagram of the structure of the present invention in the state before the outer needle sheath is deployed in specific embodiment 1;

[0042] Figure 6 This is a schematic diagram of the structure of the external needle sheath in the specific embodiment 1 of this utility model;

[0043] Figure 7 This is a schematic diagram of a specific embodiment 2 of the present utility model;

[0044] Figure 8 This is a specific embodiment 2 of the present utility model. Figure 7 A structural diagram from another perspective;

[0045] Figure 9 This is a schematic diagram of the structure in the expanded state of a specific embodiment 2 of this utility model;

[0046] Figure 10 This is a specific embodiment 2 of the present utility model. Figure 9 A structural diagram from another perspective;

[0047] Figure 11 This is a schematic diagram of a specific embodiment 3 of the present utility model;

[0048] Figure 12This is a specific embodiment 3 of the present utility model. Figure 11 A structural diagram from another perspective;

[0049] Figure 13 This is a schematic diagram of a specific embodiment 4 of the present utility model;

[0050] Figure 14 This is a specific embodiment 4 of the present utility model. Figure 13 A structural diagram from another perspective;

[0051] Figure 15 This is a schematic diagram of the structure in the expanded state of specific embodiment 4 of this utility model;

[0052] Figure 16 This is a specific embodiment 4 of the present utility model. Figure 15 A structural diagram from another perspective;

[0053] Figure 17 This is a schematic diagram of a specific embodiment 5 of the present utility model;

[0054] Figure 18 This is an exploded view of a specific embodiment 5 of the present invention;

[0055] Figure 19 This is a cross-sectional view of the loading component and the outer needle sheath in specific embodiment 5 of this utility model;

[0056] Figure 20 This is a partial structural diagram of the outer needle seat in specific embodiment 5 of this utility model;

[0057] Figure 21 This is a partial structural diagram of the limiting member in the outward-folded state of a specific embodiment 5 of this utility model;

[0058] Figure 22 This is a partial structural diagram of the limiting member in the non-outward-folding state of a specific embodiment 5 of this utility model.

[0059] In the diagram: 4 is a marker, 4.1 is the main marker, 4.11 is the circumferential sub-marker, 4.21 is the elastic claw, 4.12 is the axial sub-marker, 4.22 is the intermediate connecting section, 4.13 is the first bullet head, 4.32 is the rope structure, 4.14 is the second bullet head, and 4.24 is the spiral component;

[0060] 1 is the filling component, 2 is the outer needle sheath, 2.13 is the film, 3 is the inner needle core, 3.11 is the limiting component, and 3.12 is the rubber connecting strip. Detailed Implementation

[0061] The present invention will be further described below with reference to the accompanying drawings.

[0062] See Figures 1 to 16 A self-anchored image tracking marker includes a marker 4, which comprises a main marker 4.1 and an anchoring structure. When there is one main marker 4.1, its axial tail end is connected to a radially outwardly deformable spiral 4.42 or at least two circumferentially arranged rope structures 4.32, with the spiral 4.42 or rope structure 4.32 serving as the anchoring structure. When there are at least two main markers 4.1, each main marker 4.1 includes at least two circumferentially or axially arranged sub-markers, with adjacent sub-markers connected by the anchoring structure. The anchoring structure adjusts the length angle between adjacent sub-markers by deformation. This invention optimizes the marker structure, facilitating the marker's connection through the anchoring structure, improving the anchoring effect, preventing displacement, and allowing for deformation to expand the area of ​​its image development.

[0063] The main marker 4.1 is made of pure gold, and the anchoring structure is made of nickel-titanium shape memory alloy or a rope structure.

[0064] See Figures 1 to 6 Specific Embodiment 1: When the sub-markers are circumferentially arranged sub-markers 4.11, the cross-section of the circumferential sub-markers 4.11 is a fan-shaped structure; the anchoring structure includes elastic claws 4.21 matching the number of circumferential sub-markers 4.11. All elastic claws 4.21 are circumferentially arranged, and one end of each elastic claw 4.21 is connected to the axial tail end of the circumferential sub-marker 4.11, while the other ends of all elastic claws 4.21 are fixedly connected. When the main marker 4.1 includes two circumferentially arranged sub-markers 4.11, two elastic claws 4.21 are provided, and the two elastic claws 4.21 are connected to form a U-shape or V-shape. The axial head end of the circumferential sub-marker 4.11 is a tapered structure with a cross-section that increases from front to back along the axial direction. It also includes a filling component with an axially penetrating filling hole, in which a marker 4 that can be axially pushed out of the filling hole is installed. When the marker 4 is housed within the loading component, the axial directions of the circumferential sub-markers 4.11 are parallel to each other. After the marker 4 is pushed out of the loading component and the outer needle sheath, the axial directions of the circumferential sub-markers 4.11 form an acute angle. The anchoring structure is a nickel-titanium shape memory alloy.

[0065] See Figure 7 to Figure 10Specific Embodiment 2: When the sub-markers are axially arranged sub-markers 4.12, the anchoring structure includes a first connecting segment, a first angle adjustment segment, an intermediate connecting segment 4.22, a second angle adjustment segment, and a second connecting segment connected in sequence; the first connecting segment and the second connecting segment are respectively connected to the axial tail ends of adjacent axial sub-markers 4.12. This facilitates deformation expansion through angle changes of the first angle adjustment segment and the second angle adjustment segment. The intermediate connecting segment 4.22 is a U-shaped structure, which is set on the periphery of any axial sub-marker 4.12, with both ends of the U-shaped structure located on the axial sides of the axial sub-marker 4.12. The anchoring structure is a nickel-titanium shape memory alloy. The length direction of the first connecting segment and the second connecting segment is axial.

[0066] It also includes a loading component with an axially penetrating loading hole. A marker 4, which can be axially pushed out of the loading hole, is installed inside the loading hole. When the marker 4 is housed in the loading component, the angles of the first angle adjustment section and the second angle adjustment section are 90°. After the marker 4 is pushed out of the loading component and the outer needle sheath, the angles of the first angle adjustment section and the second angle adjustment section are greater than 90°.

[0067] See Figures 11 to 12 Specific embodiment 3: A self-anchored image tracking marker, including a marker 4, the marker 4 including a main marker 4.1 and an anchoring structure; when there is one main marker 4.1, the main marker is a bullet-shaped first bullet 4.13.

[0068] The axial tail end of the main marker 4.1 is connected to at least two circumferentially arranged rope structures 4.32, which serve as anchoring structures. The rope structures 4.32 are made of yarn.

[0069] See Figures 13 to 16 Specific embodiment 4: A self-anchored image tracking marker, comprising a marker 4, the marker 4 including a main marker 4.1 and an anchoring structure that deforms and expands radially outward; when one main marker 4.1 is provided, the main marker is a bullet-shaped second bullet 4.14. The anchoring structure is a nickel-titanium shape memory alloy.

[0070] The axial tail end of the main marker 4.1 is connected to a helical member 4.24, which serves as an anchoring structure. The helical member 4.24 is a conical helical structure with an expanding and deformed outer diameter that increases axially. It also includes a filling member with an axially penetrating filling hole, into which a marker 4 that can be axially pushed out is installed. When the helical member 4.24 is housed within the filling member, it forms a spring structure with an inner diameter that is uniformly axially aligned. When the helical member 4.24 is used to fill the filling member and the outer needle sheath, it forms a conical helical structure with an outer diameter that increases axially from the side adjacent to the main marker to the side farther away from the main marker.

[0071] See Figures 17 to 22 Specific Embodiment 5: An implantation device for a self-anchored image tracking marker includes a self-anchored image tracking marker, an inner needle core 3 and an outer needle sheath 2 arranged internally and externally, and a loading member 1. The loading member 1 has an axially penetrating loading hole, and a marker 4 that can be axially pushed out of the loading hole is installed in the loading hole. The outer needle sheath 2 includes an outer needle tube and an outer needle seat arranged axially from front to back. The outer needle seat has an installation groove for axially inserting the loading member 1. When the loading member 1 is installed in the installation groove, the loading hole is directly opposite the inner hole of the outer needle tube. The inner needle core 3 includes an inner needle body and an inner needle seat arranged axially from front to back. A limiting member 3.11 is connected to the front end of the inner needle seat. The limiting member 3.11 has a lateral clearance groove for embedding the inner needle core 3. When the limiting member 3.11 is turned outward, the outer needle seat and the inner needle seat abut against each other. When the limiting member 3.11 is sleeved on the inner needle body, the limiting member 3.11 is located between the outer needle seat and the inner needle seat. The inner needle seat is connected to the limiting member 3.11 via a rubber connecting strip 3.12. The cross-section of the lateral clearance groove is U-shaped. The opening direction of the lateral clearance groove is radial and axial at both ends.

[0072] The mounting slot has a tapered hole structure that is narrower at the front and wider at the back. The rear end of the filling hole has an outward-flaring structure, which facilitates the insertion of the marking element 4.

[0073] A thin film 2.13 is fixed to the rear opening of the mounting slot, and a cross-shaped slit is provided in the center of the thin film 2.13. The cross-shaped slit on the thin film 2.13 can provide a certain sealing effect when the inner needle core 3 is withdrawn from the outer needle sheath 2, thereby reducing the risk of pneumothorax.

[0074] When in use, the marker 4 is pre-installed in the filling hole. Paraffin wax, which is harmless to the human body, is used to fuse and fix the marker 4 in the filling hole to prevent the pre-installed marker 4 from falling off.

[0075] When implanting the marker 4, the outer needle sheath 2 first reaches the target area near or inside the tumor. The everted limiting component 3.11 then pushes the marker 4 forward via the inner needle core 3, allowing it to be easily ejected from the loading device. When multiple gold markers need to be implanted, simply remove the loading device 1 with the marker 4 already ejected and replace it with the loading device 1 containing the marker 4 for secondary implantation. The ingenious design of the marker 4 pre-installed within the loading device 1 improves the convenience and safety of the implantation process.

[0076] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A self-anchored image tracking marker, comprising a marker element, characterized in that, The marker includes a main marker and an anchoring structure; When there is one main marker, the axial tail end of the main marker is connected to a radially outward deformable spiral or at least two circumferentially arranged rope structures, with the spiral or rope structures serving as the anchoring structure. When there are at least two main markers, each main marker includes at least two sub-markers arranged circumferentially or axially. Adjacent sub-markers are connected by the anchoring structure, and the anchoring structure adjusts the length angle between adjacent sub-markers by deformation.

2. The self-anchored image tracking marker according to claim 1, characterized in that: The main marker is made of pure gold. When there is only one main marker, the spiral component is made of nickel-titanium shape memory alloy. When at least two main markers are provided, the anchoring structure is a nickel-titanium shape memory alloy.

3. The self-anchored image tracking marker according to claim 1, characterized in that: When the sub-marker is a circumferentially arranged circumferential sub-marker, the cross-section of the circumferential sub-marker is a fan-shaped structure; The anchoring structure includes elastic claws that match the number of circumferential sub-markers. All elastic claws are arranged circumferentially, and one end of each elastic claw is connected to the axial tail end of the circumferential sub-marker. The other ends of all elastic claws are fixedly connected.

4. The self-anchored image tracking marker according to claim 3, characterized in that: When there are two circumferential sub-markers, there are two elastic claws, and the two elastic claws are connected to form a U-shape or a V-shape.

5. A self-anchored image tracking marker according to claim 3, characterized in that: The axial head end of the circumferential sub-marker is a tapered structure with a cross-section that increases from front to back along the axial direction.

6. The self-anchored image tracking marker according to claim 1, characterized in that: When the sub-markers are axially arranged axial sub-markers, the anchoring structure includes a first connecting section, a first angle adjusting section, an intermediate connecting section, a second angle adjusting section, and a second connecting section connected in sequence. The first connecting segment and the second connecting segment are respectively connected to the axial tail ends of adjacent axial sub-markers.

7. A self-anchored image tracking marker according to claim 6, characterized in that: The intermediate connecting section is a U-shaped structure, which is set on the periphery of any axial sub-marker, with the two ends of the U-shaped structure located on both sides of the axial sub-marker.

8. The self-anchored image tracking marker according to claim 1, characterized in that: The spiral component is an expanded and deformed conical spiral structure with an outer diameter that increases along the axial direction.

9. An implantation device for a self-anchored image tracking marker, comprising the self-anchored image tracking marker as described in claim 1, and further comprising an inner needle core and an outer needle sheath disposed internally and externally, characterized in that, It also includes a filling component, which has an axially penetrating filling hole, and a marking component that can be axially pushed out of the filling hole is installed in the filling hole; The outer needle sheath includes an outer needle tube and an outer needle seat arranged axially from front to back, and the outer needle seat has a mounting groove for axially inserting the filling component. When the filling component is installed in the mounting groove, the filling hole is directly opposite the inner hole of the outer needle tube; The inner needle core includes an inner needle body and an inner needle seat arranged axially from front to back. A limiting member is connected to the front end of the inner needle seat, and a lateral clearance groove for embedding the inner needle core is provided on the limiting member. When the limiting member is turned outward, the outer needle seat abuts against the inner needle seat; When the limiting member is sleeved on the body of the inner needle, the limiting member is located between the outer needle seat and the inner needle seat.

10. The implantation device for a self-anchored image tracking marker according to claim 9, characterized in that, A thin film is fixed to the rear opening of the mounting groove, and a cross-shaped slit is provided in the center of the thin film.

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