A marker for radiotherapy of the tumor bed after surgical resection of oral malignant tumors

Abstract

The present invention discloses a tumor bed radiotherapy marker after surgical resection of oral malignant tumors, which relates to the field of medical device technology, including an image marker and a positioning mechanism, wherein the image marker can be deformed to adapt to the shape of the tumor bed area; the positioning mechanism is used to position the image marker to the edge of the tumor bed area in the form of adhesion or auxiliary parts. The present invention provides a tumor bed radiotherapy marker after surgical resection of oral malignant tumors, in which the image marker is attached to the edge of the tumor bed area in the oral cavity by the positioning mechanism, and when performing imaging examination, medical staff can effectively distinguish the patient's postoperative tumor bed area from the surrounding normal tissue, which is convenient for increasing the irradiation dose of the tumor bed area during radiotherapy.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a tumor bed radiotherapy marker after surgical resection of an oral malignant tumor. Background Art

[0002] The main treatment for malignant tumors is currently surgery. Due to the characteristics of the tumor, large-scale tissue resection is required during surgery to minimize the presence of residual tumor cells. However, oral malignant tumors are limited by the anatomical space of the head and neck and cannot undergo large-scale tumor resection. Auxiliary radiotherapy is usually required after surgery to further control subclinical lesions.

[0003] During radiotherapy, patients usually need to receive a boost in radiation to the tumor bed (the area where the tumor previously grew in the mouth) on top of the usual preventive dose. However, current imaging examinations (including CT and MRI) cannot distinguish the tumor bed from the surrounding normal tissue very well and mainly rely on the experience of clinicians, which brings a lot of difficulty and uncertainty to the work of clinicians in the radiation oncology department.

[0004] For example, the patent document with the authorization announcement number CN107812326B and the authorization announcement date June 20, 2023, and the name of the patent document is "A medical radiotherapy positioning marker device and calibration method", which includes a medical radiotherapy positioning marker, a positioning mold, and a radiotherapy positioning auxiliary device; a medical radiotherapy positioning marker, fixed to the body surface; a positioning mold, with radiotherapy marks for radiotherapy positioning; and a radiotherapy positioning auxiliary device for fixing the medical radiotherapy positioning marker. The patent has a specific directionality so that the medical radiotherapy positioning marker will not be placed incorrectly, and it is easy for operators to use it more conveniently, quickly, and accurately.

[0005] As for the marking device mentioned above, most of the radiotherapy markers in the prior art are used to attach the radiotherapy positioning auxiliary equipment to the body surface through medical radiotherapy positioning marking stickers. In the oral field, due to the large amount of mucus produced in the oral mucosa, the commonly used radiotherapy positioning marking stickers cannot adhere to the oral cavity, and the radiotherapy positioning auxiliary equipment cannot be effectively positioned, which increases the difficulty of the work of medical staff. Summary of the invention

[0006] The purpose of the present invention is to provide a tumor bed radiotherapy marker after surgical resection of oral malignant tumors to solve the above-mentioned shortcomings in the prior art.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A tumor bed radiotherapy marker after surgical resection of oral malignant tumors, comprising:

[0009] An imaging marker that can be deformed to fit the shape of the tumor bed area;

[0010] A positioning mechanism is used to position the image marker at the edge of the tumor bed area by adhesion or auxiliary means.

[0011] In the above-mentioned tumor bed radiotherapy marker after surgical resection of oral malignant tumor, the image marker is a metal wire.

[0012] The above-mentioned tumor bed radiotherapy marker after surgical resection of oral malignant tumor, the positioning mechanism is a structure that can adhere to the edge of the tumor bed area.

[0013] In the above-mentioned tumor bed radiotherapy marker after surgical resection of oral malignant tumor, the positioning mechanism is wrapped on the imaging marker.

[0014] In the above-mentioned tumor bed radiotherapy marker after surgical resection of oral malignant tumor, the positioning mechanism is chicle or edible gum.

[0015] In the above-mentioned tumor bed radiotherapy marker after surgical resection of oral malignant tumor, the positioning mechanism also includes a thin line, one end of which is limited to the image marker and the other end is limited to the outside of the oral cavity.

[0016] The above-mentioned tumor bed radiotherapy marker after surgical resection of oral malignant tumor, the positioning mechanism is an auxiliary part, which includes a main body, a supporting assembly is arranged on the main body, a marker rod is arranged on the main body, the image marker is arranged at the end of the marker rod, a sphere is fixed on the main body, an arc rod is rotatably connected to the main body, one end of the marker rod is slidably connected to the arc rod, and also includes a suction cup slidably connected to the marker rod.

[0017] The above-mentioned tumor bed radiotherapy marker after surgical resection of oral malignant tumor, the support assembly includes a support plate and two parallel rods parallel to each other, the same end of the two parallel rods is rotatably connected to the main body, and the other end is rotatably connected to the support plate.

[0018] The above-mentioned tumor bed radiotherapy marker after surgical resection of oral malignant tumor, the support component also includes a connecting shaft rotatably connected to the main body, a connecting rod is fixed on the parallel rod, and the connecting rod is slidably sleeved with the connecting shaft.

[0019] The above-mentioned tumor bed radiotherapy marker after surgical resection of oral malignant tumor has a rack slidably connected inside the main body, a first gear meshing with the rack is fixed on a connecting shaft, and also includes a first elastic member in a compressed state, and the two ends of the first elastic member are respectively hinged to the rack and the main body.

[0020] In the above technical scheme, the present invention provides a post-operative tumor bed radiotherapy marker for oral malignant tumor resection, which affixes the imaging marker to the edge of the tumor bed area in the oral cavity through a positioning mechanism. When performing imaging examinations, medical staff can effectively distinguish between the patient's post-operative tumor bed area and surrounding normal tissues, making it convenient to increase the dose of irradiation to the tumor bed area during radiotherapy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0022] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0023] Figure 2 A structural schematic diagram provided for another embodiment of the present invention;

[0024] Figure 3 A front view provided for another embodiment of the present invention;

[0025] Figure 4 A cross-sectional structural diagram of a sign pole provided by another embodiment of the present invention;

[0026] Figure 5 A schematic diagram of a rack structure provided by another embodiment of the present invention;

[0027] Figure 6 A schematic structural diagram of a first elastic member provided in yet another embodiment of the present invention;

[0028] Figure 7 A schematic diagram of a side view of a support plate supporting a tooth provided by another embodiment of the present invention;

[0029] Figure 8 This is an overall schematic diagram of a support plate supporting teeth according to another embodiment of the present invention;

[0030] Fig. 9 A schematic diagram of a curved plate structure provided by another embodiment of the present invention;

[0031] Fig.10 A schematic diagram of the structure of a second elastic member provided by another embodiment of the present invention;

[0032] Fig.11 A schematic diagram of a block structure provided for another embodiment of the present invention;

[0033] Fig.12 A schematic diagram of a linkage rod structure provided in yet another embodiment of the present invention.

[0034] Description of reference numerals:

[0035] 1. Image marking part; 2. Edible glue; 3. Thin wire; 4. Main body; 5. Marking rod; 6. Sphere; 7. Arc rod; 8. Suction cup; 9. Operating rod; 10. Handle; 11. Support plate; 12. Parallel rod; 13. Connecting shaft; 14. Connecting rod; 15. Rack; 16. First gear; 17. Driving groove; 18. Second gear; 19. First elastic part; 20. Arc plate; 21. Second elastic part; 22. Limiting block; 23. Frame; 24. Linkage rod; 25. Through groove; 26. Raised block; 27. Slide groove. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0037] Reference Figure 1-12 An embodiment of the present invention provides a tumor bed radiotherapy marker after surgical resection of an oral malignant tumor, including an image marker 1 and a positioning mechanism. The image marker 1 can be deformed to adapt to the shape of the tumor bed area; the positioning mechanism is used to position the image marker 1 to the edge of the tumor bed area by adhesion or auxiliary means.

[0038] Specifically, oral malignant tumors require adjuvant radiotherapy after surgery to further control subclinical lesions. During radiotherapy, patients usually need to give the tumor bed area (the part where the tumor previously grew in the oral cavity) an increased dose of irradiation on the basis of the ordinary preventive dose. For the tumor bed area in the oral area, there is currently no better way to fit the positioning device to the tumor bed area. This is an existing technology and will not be elaborated. The innovation of the present invention is that the image marker 1 is attached to the edge of the tumor bed area in the oral cavity by means of adhesion or auxiliary parts through a positioning mechanism. The positioning mechanism can use harmless colloids in the prior art, and the image marker 1 can use metal wires in the prior art, such as lead wire, copper wire or aluminum wire. The metal wire has a certain plasticity and can be manually bent into a shape that fits the edge of the tumor bed area to fit the tumor bed area and mark the position and shape of the tumor bed area, and the imaging characteristics are obvious; before performing an imaging examination, the image marker 1 is attached to the edge of the tumor bed area in the patient's oral cavity through the positioning mechanism, so that the tumor bed area can be distinguished from normal tissue during the imaging examination, and then the position and shape of the patient's tumor bed area after surgery can be determined, so that the tumor bed area can be irradiated with increased doses during radiotherapy.

[0039] An embodiment of the present invention provides a post-operative tumor bed radiotherapy marker for oral malignant tumor resection. An imaging marker 1 is attached to the edge of the tumor bed area in the oral cavity through a positioning mechanism. When performing imaging examinations, medical staff can effectively distinguish between the patient's post-operative tumor bed area and surrounding normal tissues, making it convenient to increase the irradiation dose of the tumor bed area during radiotherapy.

[0040] In another embodiment provided by the present invention, further, the positioning mechanism is a structure that can adhere to the edge of the tumor bed area. Specifically, the positioning mechanism can select a viscous colloid in the prior art, such as sugar gum, gum or edible gum 2. When in use, the colloid is first connected to the image marker 1 by adhesion, and then the colloid is adhered to the edge of the tumor bed area in the oral cavity. In this way, the image marker 1 can be positioned at the edge of the tumor bed area in the oral cavity by adhesion. The advantages are that, first, the sticky colloid can be attached to the oral mucosa in a moist environment of the oral cavity, and the viscosity of the sugar gum or edible gum 2 is relatively small, and it can be easily removed after the positioning is completed; second, the sugar gum or edible gum 2 is non-toxic and harmless, and can be eaten. Even if the colloid falls off in the oral cavity or even in the digestive tract, it will not cause perforation or poisoning to the human body; third, the colloid material is relatively soft, and it can be combined with the image marker 1 to show a density different from that of human tissue in the imaging examination, which is convenient for clinicians to determine the tumor bed area that needs to be irradiated after surgery.

[0041] Preferably, the positioning mechanism is wrapped around the image marker 1. Specifically, in the above embodiment, the image marker 1 is made of metal wire, and direct contact between metal and the oral cavity may cause damage to the human body, especially when the image marker 1 is made of heavy metal material that is harmful to the human body, direct contact between the image marker 1 and the oral cavity may cause great harm to the human body. In this embodiment, the image marker 1 can be wrapped by the positioning mechanism, so that the image marker 1 can be avoided as much as possible from being in direct contact with the oral cavity, and the harm caused by the image marker 1 to the human body can be avoided as much as possible.

[0042] During the imaging examination, the patient will swallow unconsciously. When the image marker 1 is small, the patient may swallow the image marker 1 into the stomach. Furthermore, the positioning mechanism also includes a thin wire 3, one end of which is limited to the image marker 1, and the other end is limited to the outside of the oral cavity. Specifically, one end of the thin wire 3 can be tied to the image marker 1, and the other end extends outside the oral cavity and can be fixed to the patient's skin with medical tape, or the thin wire 3 can be connected to a limiting structure larger than the mouth outside the oral cavity through the thin wire 3, so as to avoid the patient's chewing, swallowing and other actions causing the image marker 1 to enter the digestive tract.

[0043] In another embodiment provided by the present invention, further, the positioning mechanism is an auxiliary part, which includes a main body 4, a support assembly is provided on the main body 4, a marker rod 5 is provided on the main body 4, the image marker 1 is provided at the end of the marker rod 5, a sphere 6 is fixed on the main body 4, an arc rod 7 is rotatably connected to the main body 4, one end of the marker rod 5 is slidably connected to the arc rod 7, and also includes a suction cup 8 slidably connected to the marker rod 5. Specifically, in this embodiment, the positioning mechanism positions the image marker 1 at the edge of the tumor bed area in the form of an auxiliary part; the main body 4 is constructed as a U-shaped block with an upward opening, the sphere 6 is fixed at the opening position of the main body 4, the arc rod 7 is rotatably connected to the opening position of the main body 4, and the marker rod 5 is limited to the main body 4 by the arc rod 7; the overall volume of the main body 4 and the support assembly is smaller than the volume of the oral cavity after opening, the main body 4 is limited in the oral cavity by the support assembly, and the image marker 1 can be fixed by structures such as the sphere 6 and the marker rod 5 on the main body 4; the support assembly can be selected from the prior art The invention relates to a structure such as an opener to fix the main body 4 and the image marker 1 in the oral cavity; the marker rod 5 can use a telescopic rod in the prior art, which can be adjusted in length and can be locked after the length is adjusted. This is the prior art and will not be described in detail; the arc rod 7 is constructed as an arc structure and the center of the arc structure coincides with the center of the sphere 6, the radius of the arc structure is greater than the radius of the sphere 6, and the rotation axis between the arc rod 7 and the main body 4 is a horizontal radial line of the sphere 6; the marker rod 5 is arranged along the radial direction of the sphere 6, and the suction cup 8 is between the arc rod 7 and the sphere 6; the image marker 1 is fixed or wrapped around the marker rod 5 The end of the sign rod 5 away from the sphere 6 (the end of the sign rod 5 away from the sphere 6 is the telescopic end), the end of the sign rod 5 close to the sphere 6 is constructed with an arc groove, and the arc rod 7 is slidably set in the arc groove (because the arc rod 7 and the arc groove are constructed as mutually adapted arcs, the two can only slide relative to each other but cannot rotate relative to each other), so that the sign rod 5 and the image sign member 1 can move in an arc along the arc rod 7 around the sphere 6. Since the rotation axis between the arc rod 7 and the main body 4 is a horizontal radial line of the sphere 6, the image sign member 1 can move along the arc rod 7 and can also rotate around the sphere 6 with the arc rod 7. That is, the marking rod 5 and the image marking part 1 can be rotated in multiple directions around the center of the sphere 6 through the arc rod 7; the marking rod 5 is constructed with a movable groove along its axial direction, and the end of the movable groove close to the sphere 6 is constructed as an opening, and an operating rod 9 is slidably connected in the movable groove, and the suction cup 8 is fixed to the end of the operating rod 9 close to the sphere 6 (that is, the suction cup 8 is slidably connected to the marking rod 5 through the operating rod 9), and a handle 10 is fixed to the end of the operating rod 9 away from the sphere 6. The handle 10 passes through the movable groove and extends to the outside of the marking rod 5, so that medical staff can control the operating rod 9 and the suction cup 8 to move axially along the movable groove through the handle 10.The purpose of such a setting is that after the main body 4 is fixed in the oral cavity through the supporting structure, the marker rod 5 can rotate around the center of the sphere 6 through the arc rod 7. After the angle of the marker rod 5 is determined, the handle 10 drives the operating rod 9 and the suction cup 8 along the movable groove to approach the sphere 6 and adsorb on the outer wall of the sphere 6. In this way, the position of the marker rod 5 and the arc rod 7 can be limited by the suction cup 8 (only the position of the marker rod 5 is limited, not its length). Subsequently, the length of the marker rod 5 and the angle of the image marker 1 can be adjusted to make the image marker 1 fit the tumor bed area of ​​the patient's oral cavity, thereby marking the position of the tumor bed area during imaging examination.

[0044] Preferably, the support assembly includes a support plate 11 and two parallel rods 12 parallel to each other, the same end of the two parallel rods 12 is rotatably connected to the main body 4, and the other end is rotatably connected to the support plate 11. Specifically, the two parallel rods 12 are of the same length and parallel to each other, and the two ends of the two parallel rods 12 are rotatably connected to the support plate 11 and the main body 4, respectively, so that the connecting lines of the four connection points at the two ends of the two parallel rods 12 form a parallelogram, and the two parallel rods 12 and the support plate 11 can rotate around the main body 4 (optionally, a micro motor can be provided on the main body 4 to drive one parallel rod 12 to rotate, which will not be repeated); when one parallel rod 12 rotates around the main body 4, the other parallel rod 12 will rotate around the main body 4 synchronously, thereby driving the support plate 11 to move, and the support plate 11 is angularly moved relative to the main body 4 during the movement. The degree will not change (only the position will change), and its angle is always the same as the angle of the line connecting the connection points of the two parallel rods 12 and the main body 4; two groups of support components are symmetrically arranged on the same side of the main body 4 to simultaneously support the upper and lower sides of the oral cavity (the upper side, lower side, left side, right side, front side and back side are all determined according to the patient's facial orientation); accordingly, in order to further improve the stability of the image marker 1, two groups of support components are arranged on the opposite sides of the main body 4, that is, a total of four groups of support components are arranged on both sides of the main body 4 to simultaneously support the left and right sides of the oral cavity, thereby further ensuring the stability of the image marker 1. The purpose of such a setting is that, firstly, the patient generally needs to open his mouth during radiotherapy to ensure the accuracy and effectiveness of the radiotherapy, while also being able to avoid tissue adhesion as much as possible. In the embodiment of the present invention, two groups of support components (or four groups of support components) are provided, so that the patient's mouth can be supported by two support plates 11 (or four support plates 11) (the support plate 11 can be supported on the patient's teeth), thereby improving the effectiveness of radiotherapy; secondly, the angle of the parallel rod 12 relative to the main body 4 can be adjusted, and when the angle of the parallel rod 12 is adjusted, the support plate 11 moves synchronously to change the position of the support plate 11 supporting the mouth, thereby adapting to different groups of people; thirdly, when the patient's mouth is supported by the support plate 11, the support plate 11 may affect the fit between the image marker 1 and the tumor bed area. At this time, the angle of the parallel rod 12 and the support plate 11 can also be adjusted so that the support plate 11 is supported at other positions of the mouth, thereby adapting to the operation of the image marker 1.

[0045] It should be noted that a flexible pad is provided on the support plate 11, and the flexible pad can adapt to support different positions of the patient's mouth, and the flexible pad can also protect the patient's teeth.

[0046] In another embodiment provided by the present invention, further, the support assembly also includes a connecting shaft 13 rotatably connected to the main body 4, and a connecting rod 14 is fixed on the parallel rod 12, and the connecting rod 14 is slidably sleeved with the connecting shaft 13. Specifically, the connecting rod 14 is constructed as a non-rotating body, and the connecting shaft 13 is constructed with a connecting groove adapted to the connecting rod 14 along its axial direction, and the connecting rod 14 is slidably set in the connecting groove; a clamping piece can be set on the connecting shaft 13 to limit the relative position of the connecting rod 14 and the connecting shaft 13, which is a prior art and will not be repeated; the effect of such a setting is that when the four groups of support assemblies are running, the support plate 11 can support different positions of the patient's teeth to adapt to different situations, such as supporting the front teeth or back teeth in the mouth (the canines and incisors located in the front of the mouth are called front teeth, and the molars and premolars located in the back of the mouth are called back teeth). There is a certain distance between the front teeth or back teeth on the left and right sides of the human body. Obviously, the mouth The distance between the front teeth on the left and right sides of the cavity is smaller than the distance between the back teeth on the left and right sides. When the support plate 11 supports the teeth on the front side of the oral cavity, the support plates 11 on the left and right sides of the main body 4 need to be relatively close to the main body 4. When the support plate 11 supports the teeth on the back side of the oral cavity, the support plates 11 on the left and right sides of the main body 4 need to be relatively far away from the main body 4. For this purpose, a connecting shaft 13 is provided, so that the parallel rod 12 can be rotatably connected to the main body 4 through the connecting shaft 13 and can be moved axially along the connecting shaft 13 through the connecting rod 14, so as to adjust the distance between the support plate 11 and the main body 4, and then adjust the distance between the support plates 11 on both sides of the main body 4. In this way, the support plate 11 can support the teeth in different positions of the patient at a suitable position and angle.

[0047] As an alternative to the above-mentioned micro-motor driving a parallel rod 12 to rotate, further, a rack 15 is slidably connected in the main body 4, and a first gear 16 meshing with the rack 15 is fixed on one of the connecting shafts 13. Specifically, an active cavity is constructed in the main body 4, and a driving groove 17 is constructed on the inner wall of the active cavity. The rack 15 is slidably connected in the driving groove 17. When the rack 15 slides along the driving groove 17, it can drive the first gear 16 and a connecting shaft 13 to rotate. When a connecting shaft 13 rotates, the entire support assembly where it is located will change its state accordingly, so that the position of the support plate 11 changes. In this way, the support plate 11 can be driven to move by the rack 15, and the driving force of the support plate 11 can be selected from the linear drive mechanism in the prior art, such as an electric push rod and other structures, and preferably can be directly manual. Two groups of support components are arranged on the left or right side of the main body 4, and the two groups of support components are arranged symmetrically from top to bottom, that is, four connecting shafts 13 are connected to the same side of the main body 4 from top to bottom. In this embodiment, the second gears 18 are fixed on the two middle connecting shafts 13, and the two second gears 18 are both in the movable cavity and the two second gears 18 are meshed with each other. When the connecting shafts 13 of one group of support components rotate, the connecting shafts 13 of the other group of support components can be driven to change accordingly through the two second gears 18, so that the support plates 11 in the two support components can move synchronously. In this way, a rack 15 is arranged on the same side of the main body 4 to synchronously drive the two groups of support components on the same side.

[0048] Preferably, it also includes a first elastic member 19 in a compressed state, and the two ends of the first elastic member 19 are respectively hinged to the rack 15 and the main body 4. Specifically, the first elastic member 19 can be a spring or an elastic telescopic rod in the prior art, such as Figure 6 As shown, the first elastic member 19 is an elastic telescopic rod in a compressed state, and its two ends are hinged to the outer wall of the rack 15 and the inner wall of the active cavity respectively; the rack 15 has a certain sliding stroke in the active cavity, and when the rack 15 is in the middle position of its sliding stroke, the elastic telescopic rod is perpendicular to the rack 15. At this time, the elastic force of the elastic telescopic rod on the rack 15 is perpendicular to the sliding direction of the rack 15, that is, at this time, the elastic telescopic rod cannot force the rack 15 to slide along the active cavity; when the rack 15 leaves the middle position of its sliding stroke, the elastic force of the elastic telescopic rod on the rack 15 can force the rack 15 to slide along the active cavity until the rack 15 moves to the end of its sliding stroke, that is, in this embodiment, the rack 15 has a first position at the front end of its sliding stroke and a second position at the rear end of its sliding stroke. When the rack 15 is in the first position, the support plate 11 and the parallel rod 12 in the support assembly are at the rear side of the main body 4, so as to support the patient's posterior teeth through the support plate 11 ( Figure 7 and Figure 81 and 1 are schematic diagrams of the support plate 11 supporting the teeth, wherein the solid line support plate 11 shows that the posterior teeth are supported); conversely, when the rack 15 is in the second position, the support assembly is located at the front side of the main body 4 to support the patient's front teeth through the support plate 11 (such as Figure 7 and Figure 8 The dotted support plate 11 in the middle shows that it supports the front teeth. The purpose of such a setting is that, firstly, the position of the rack 15 can be limited by setting the first elastic member 19, so that it is in the first position or the second position, thereby limiting the position of the support plate 11 to the front side or the rear side of the main body 4, so that the support assembly can support the patient's posterior teeth or front teeth; secondly, when the state of the support assembly needs to be adjusted, the parallel rod 12 is moved to drive the rack 15 to move along the active cavity to adjust the position of the rack 15, so as to facilitate the adjustment of the position of the support assembly relative to the main body 4 according to the position of the patient's tumor bed area.

[0049] As an alternative to the above-mentioned clamping member limiting the relative position of the connecting shaft 13 and the connecting rod 14, further, the outer wall of the main body 4 is constructed with an arc plate 20, and a second elastic member 21 in a stretched state is provided between the connecting rod 14 and the connecting shaft 13. Specifically, the second elastic member 21 can be a spring in the prior art, which is in a stretched state to force the connecting rod 14 into the connecting groove, thereby driving the parallel rods 12 and the support plate 11 to move closer to the main body 4; the arc plate 20 is located on the rear side of the main body 4 as a whole, and the front end of the arc plate 20 is smoothly connected to the side wall of the main body 4, and the rear end protrudes from the side wall of the main body 4; in the process of the rack 15 moving from the second position to the first position, a parallel rod 12 away from the rack 15 will first contact the arc plate 20 and be contacted by the arc plate 20 to move away from the main body 4 (this process requires overcoming the pulling force of the second elastic member 21). Since the support plate 11 and the two parallel rods 12 can only change their angles and positions within one plane, when one parallel rod 12 moves away from the main body 4, the support plate 11 and the other parallel rod 12 connected thereto will both move away The main body 4, until the rack 15 moves to the first position, the position of the supporting assembly remains stable, that is, after the rack 15 is in the first position, the support plate 11 and the parallel rod 12 move to the rear side of the main body 4, at this time the parallel rod 12 is abutted by the arc plate 20 to move away from the main body 4, so that the distance between the support plate 11 and the main body 4 is increased, thereby adapting to the larger distance between the left and right posterior teeth of the patient; correspondingly, when the rack 15 moves from the first position to the second position, the parallel rod 12 moves from the rear side of the main body 4 to the front side, during which the parallel rod 12 moves away from the arc plate 20 and abuts against the side wall of the main body 4, at this time the parallel rod 12 and the support plate 11 approach the main body 4 under the pulling force of the second elastic member 21, thereby reducing the distance between the support plate 11 and the main body 4, thereby adapting to the smaller distance between the left and right front teeth of the patient. In this way, the number of operating steps when using the marking structure can be minimized (in the above embodiment, the clamping parts need to be adjusted, but this step is omitted in this embodiment). Through simple operations, the overall structure can be changed to support the front or back side of the oral cavity, making it convenient to mark the tumor bed area.

[0050] Preferably, a group of the support components are provided with limiting blocks 22 on both the front and rear sides. Specifically, the two limiting blocks 22 are fixed on the main body 4 and are respectively located on the front and rear sides of the support component. One group of support components corresponds to two limiting blocks 22. Two groups of support components are provided on one side of the main body 4, and four limiting blocks 22 are fixed on the side wall of the main body 4. When the rack 15 is in the first position, a parallel rod 12 on the rear side of the support component contacts the limiting block 22 on the rear side, thereby limiting the parallel rod 12 from continuing to rotate backward. At this time, the rack 15 also moves to its stroke end, thereby limiting the parallel rod 12 through the limiting block 22 and the rack 15. and the support plate 11 are limited to the rear side of the main body 4; conversely, when the rack 15 is in the second position, the other parallel rod 12 on the front side of the support assembly abuts against the limiting block 22 on the front side, and the rack 15 also moves to the other end of its stroke accordingly, thereby limiting the positions of the parallel rods 12 and the support plate 11 to the front side of the main body 4; in this way, no matter whether the rack 15 is in the first position or the second position, the limiting block 22 can prevent the support plates 11 on the upper and lower sides from approaching each other when the patient is biting, thereby maintaining the stability of the positioning mechanism.

[0051] In another embodiment provided by the present invention, further, a square frame 23 is slidably connected to the main body 4, the sign rod 5 is located in the square frame 23, a linkage rod 24 is fixed to the square frame 23, a through groove 25 is constructed on the linkage rod 24, a protruding block 26 is fixed on the rack 15, the linkage rod 24 is located in the active cavity, and the protruding block 26 is located in the through groove 25. Specifically, the frame 23 is located above the sphere 6, and has a rectangular space inside for the movement of the sign post 5; a slide groove 27 connected to the movable cavity is constructed on the main body 4, and the two ends of the slide groove 27 are respectively facing the front and rear sides of the oral cavity, and the frame 23 is slidably connected in the slide groove 27, that is, the frame 23 can move toward the front or rear side of the oral cavity along the slide groove 27; the linkage rod 24 extends from the slide groove 27 to the movable cavity, and when the rack 15 moves along the movable cavity, the protrusion 26 can resist the inner wall of the through groove 25 and drive the frame 23 to slide along the slide groove 27, and when the rack 15 moves from the second position to the first position, the rack 15 moves along the driving The movable groove 17 moves toward the front end, and at the same time, the protruding block 26 can contact the linkage rod 24 and drive the frame 23 to move forward along the slide groove 27, so that the frame 23 can be moved to the front side of the oral cavity when the support plate 11 supports the patient's back teeth, so as to limit the range of movement of the marker rod 5 and the image marker 1 to the front side of the oral cavity, and try to avoid conflict between the image marker 1 and the support plate 11. Conversely, when the rack 15 moves from the first position to the second position, the support plate 11 supports the patient's front teeth, and the frame 23 moves to the back side of the oral cavity accordingly, so that the image marker 1 marks the tumor bed area on the back side.

[0052] To summarize, when the tumor bed area of ​​the patient is at the front side of the oral cavity, the parallel rods 12 are moved to move the support plate 11 in the support assembly to the back side to support the patient's back teeth, and the frame 23 is moved to the front side accordingly, thereby limiting the marker rod 5 and the image marker 1 to the front side of the oral cavity to mark the tumor bed area. Conversely, when the tumor bed area of ​​the patient is at the back side of the oral cavity, the parallel rods 12 are moved to move the support plate 11 to the front side to support the patient's front teeth, and the frame 23 is moved to the back side of the oral cavity, thereby limiting the marker rod 5 and the image marker 1 to the back side of the oral cavity to mark the tumor bed area; and in the process of the movement of the support plate 11, the distance between the support plate 11 and the main body 4 can be adjusted adaptively, thereby adapting to the human tooth structure.

[0053] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A tumor bed radiotherapy marker after surgical resection of oral malignant tumors, characterized in that: include: An imaging marker that can be deformed to fit the shape of the tumor bed area; A positioning mechanism, which is used to position the image marker to the edge of the tumor bed area by means of adhesion or auxiliary parts; The positioning mechanism is an auxiliary component, which includes a main body, a supporting assembly is arranged on the main body, a sign rod is arranged on the main body, the image sign is arranged at the end of the sign rod, a sphere is fixed on the main body, an arc rod is rotatably connected to the main body, one end of the sign rod is slidably connected to the arc rod, and also includes a suction cup slidably connected to the sign rod; The image marking member is a metal wire, and the supporting assembly includes a supporting plate and two parallel rods parallel to each other. The same end of the two parallel rods is rotatably connected to the main body, and the other end is rotatably connected to the supporting plate. The supporting assembly also includes a connecting shaft rotatably connected to the main body, and a connecting rod is fixed on the parallel rods, and the connecting rod is slidably sleeved with the connecting shaft.

2. A tumor bed radiotherapy marker after surgical resection of oral malignant tumor according to claim 1, characterized in that: A rack is slidably connected inside the main body, a first gear meshing with the rack is fixed on one of the connecting shafts, and the main body also includes a first elastic member in a compressed state, and two ends of the first elastic member are respectively hinged to the rack and the main body.

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