Intelligent positioning device for radiotherapy and use method thereof

Abstract

The invention discloses an intelligent positioning device for radiotherapy and a use method thereof, and relates to the technical field of medical instruments, the device comprises a moving seat, and the top end of the moving seat is connected with a positioning table through a lifting support mechanism; the first motor drives the two sets of bottom plates on the front side and the rear side of the top end of the positioning table to move in the same direction or in the opposite directions, the two sets of bottom plates are adjusted to proper positions according to the physiques of different patients, and meanwhile the vertical plate is slidably connected into the concave base and is positioned through the elastic positioning mechanism; the position of the elastic buffer pad can be adaptively adjusted according to the head position of a patient, so that the intelligent positioning device for radiotherapy can be adaptively adjusted according to different radiotherapy patients, and the retraction force of the positioning plate is detected in real time through the pressure sensor on the vertical plate; and when the detected pressure reaches a preset value, the second motor is driven to stop working, so that good positioning comfort can be provided for the head of the patient.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an intelligent positioning device for radiotherapy and a method for using the same. Background Art

[0002] Radiotherapy can accurately focus high-energy rays on tumor tissue, causing irreversible damage to tumor cells. Compared with surgery, radiotherapy does not require surgery, thus avoiding the trauma and risks brought by surgery. The radiotherapy positioning device is a device used to fix the patient's position during radiotherapy to ensure that the radiotherapy rays can accurately act on the lesion site, so as to avoid radiation irradiating other parts of the patient and reduce unnecessary damage.

[0003] Most of the existing positioning devices for radiotherapy are not convenient for adaptively adjusting the position of the positioning mechanism according to different radiotherapy patients, resulting in that the positioning devices for radiotherapy are not convenient for positioning different radiotherapy patients. In addition, the intelligence level of the existing positioning devices for radiotherapy is low, and the positioning mechanism needs to be manually operated to position the patient's head. Not only is the degree of automation low, but the positioning clamping force of the patient's head cannot be intelligently adjusted. Therefore, the present invention proposes an intelligent positioning device for radiotherapy and a method of use thereof to solve the problems existing in the prior art. Summary of the invention

[0004] In response to the above problems, the purpose of the present invention is to propose an intelligent positioning device for radiotherapy and a method of use thereof, which solves the problems that the existing positioning devices for radiotherapy are not convenient for adaptively adjusting the position of the positioning mechanism according to different radiotherapy patients, and have low levels of intelligence and automation.

[0005] In order to achieve the objectives of the present invention, the present invention is implemented through the following technical solutions: an intelligent positioning device for radiotherapy, comprising a movable seat, the top of the movable seat is connected to a positioning platform through a liftable supporting mechanism, a bottom plate which is displaced by a first motor is symmetrically arranged in the middle position of the top of the positioning platform, a top plate is fixed above the bottom plate, a positioning film pressing mechanism is arranged on the top plate, a trunk positioning film is fixed between the bottom plate and the top plate through the positioning film pressing mechanism, a concave seat which is displaced by a second motor is symmetrically arranged on one of the left and right sides of the top of the positioning platform, a vertical plate is slidably connected to the inner side of the concave seat, the vertical plate and the concave seat are fixedly clamped by an elastic positioning mechanism, the side walls of the two groups of vertical plates on opposite sides are connected to the positioning plate through a limit spring, an elastic buffer pad is sleeved on the side of the positioning plate away from the vertical plate, and a pressure sensor electrically connected to the second motor is fixed on the side of the vertical plate close to the positioning plate.

[0006] A further improvement is that the liftable support mechanism includes a first support beam slidably connected to both sides of the inside of the moving seat and a second support beam slidably connected to both sides of the bottom end of the positioning platform. The two groups of the first support beams and the two groups of the second support beams are hingedly connected by hinges with scissor racks symmetrically distributed front and back. One of the two groups of the first support beams is driven to move by a push-pull adjustment mechanism.

[0007] A further improvement is that the push-pull adjustment mechanism includes a partition fixed inside the moving seat and a first one-way screw rotatably connected between the partition and the inner wall of the moving seat, the end of the first one-way screw away from the partition passes through a bearing to the outside of the moving seat and is fixed with a handle, a push plate is threadedly sleeved on the first one-way screw, and a push rod that slides through the partition is symmetrically fixed between the push plate and the first support beam.

[0008] Further improvements are: limiting protrusions are fixed on both the front and rear sides of the first support beam, limiting grooves matching the limiting protrusions are opened on the front and rear side walls of the movable seat, and a sliding rod sliding through the second support beam is fixed on the bottom end of the positioning platform.

[0009] Further improvement is that: the output end of the first motor passes through the interior of the positioning platform through a bearing and is fixed with a first bidirectional screw, both sides of the first bidirectional screw are threadedly sleeved with a first threaded plate, and a first support block that slides through the top of the positioning platform is symmetrically fixed between the first threaded plate and the bottom plate.

[0010] Further improvements are: the positioning film pressing mechanism includes a second one-way screw rod threaded through the top plate and a turntable fixed to the top of the second one-way screw rod, the bottom end of the second one-way screw rod is rotatably connected to a pressure plate, the top of the pressure plate is symmetrically fixed with a limit rod that slides through the top plate, the bottom end of the pressure plate is fixed with a T-shaped pressure strip, and the top of the bottom plate is provided with a T-shaped groove that matches the T-shaped pressure strip.

[0011] Further improvement is that: the output end of the second motor passes through the interior of the positioning platform through a bearing and is fixed with a second bidirectional screw, both sides of the second bidirectional screw are threadedly sleeved with a second threaded plate, and a second support block is fixed between the second threaded plate and the concave seat and slides through the top of the positioning platform.

[0012] A further improvement is that the elastic positioning mechanism includes a square frame fixed to the side walls on opposite sides of the two groups of concave seats and a positioning pin that slides through the square frame and the concave seat, and positioning holes that are compatible with the positioning pin are equidistantly provided on the side of the vertical plate close to the square frame, a baffle is fixedly sleeved on one side of the positioning pin located in the square frame, and a linear spring sleeved on the outside of the positioning pin is connected between the inner wall of the square frame on the side away from the concave seat and the baffle.

[0013] A method for using an intelligent positioning device for radiotherapy, comprising the following steps:

[0014] Step 1: First, use the liftable support mechanism to adjust the height of the positioning table until the positioning table is lifted and lowered to the actual required height. Then, the patient to be radiotherapy lies flat on the top of the positioning table with his head facing left. Then, according to the position of the patient's head, the vertical plate is slid in the concave seat to an appropriate position, and the vertical plate is positioned and fixed by the elastic positioning mechanism.

[0015] Step 2: Use the first motor to drive the two sets of bottom plates to move, and move the two sets of bottom plates to corresponding positions according to the patient's torso specifications, then cover the patient's torso with a pre-made torso positioning film, and place the front and rear ends of the torso positioning film on the top of the bottom plate respectively, and use the positioning film pressing mechanism to press and fix the torso positioning film on the top of the bottom plate, so as to limit the patient's torso position with the torso positioning film;

[0016] Step three: Use the second motor to drive the two groups of concave seats to drive the two groups of vertical plates to move toward each other. During the displacement of the vertical plates, the positioning plates are driven to move toward the patient's head until the elastic buffer pad contacts the patient's head. The vertical plates continue to move and continue to move toward the positioning plates under the action of the limit spring until they contact the pressure sensor. When the pressure sensor detects that the pressure reaches the preset value, it indicates that the clamping force on the patient's head reaches the optimal comfort level. At this time, the pressure sensor sends an electrical signal to the second motor to stop working, and ends the continued clamping of the patient's head, so as to limit the patient's head using the two groups of elastic buffer pads.

[0017] The beneficial effects of the present invention are as follows: the present invention drives the two groups of bottom plates on the front and rear sides of the top of the positioning platform to move toward or in opposite directions through the first motor, and adjusts the two groups of bottom plates to appropriate positions according to the physiques of different patients, so that the trunk positioning film can be pressed and fixed to the top of the bottom plate by the positioning film pressing mechanism and the patient's trunk can be positioned. At the same time, the vertical plate is slidably connected in the concave seat and positioned by the elastic positioning mechanism, so that the position of the elastic buffer pad can be adaptively adjusted according to the position of the patient's head, so that the intelligent positioning device for radiotherapy can be easily adaptively adjusted according to different radiotherapy patients, and is easy to position different radiotherapy patients, and has high applicability.

[0018] The retraction force of the positioning plate is detected in real time through the pressure sensor on the vertical plate, and the second motor is driven to stop working when the pressure reaches the preset value, thereby realizing intelligent positioning and clamping of the patient's head. It can provide good positioning comfort for the patient's head and has a high degree of intelligence and automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a front view of the present invention;

[0020] Figure 2 is a front cross-sectional view of the present invention;

[0021] Figure 3 is a top sectional view of the mobile seat of the present invention;

[0022] Figure 4 is a top view of the positioning platform of the present invention;

[0023] Figure 5 is a top cross-sectional view of the positioning platform of the present invention;

[0024] Figure 6 is a cross-sectional view of a vertical plate and a positioning plate of the present invention;

[0025] Figure 7 The present invention Figure 6 A in the enlarged view;

[0026] Figure 8 It is a schematic diagram of the three-dimensional structure of the bottom plate and the top plate of the present invention.

[0027] Among them: 1. moving seat; 2. positioning platform; 3. first motor; 4. bottom plate; 5. top plate; 6. trunk positioning membrane; 7. second motor; 8. concave seat; 9. vertical plate; 10. limit spring; 11. positioning plate; 12. elastic buffer pad; 13. pressure sensor; 14. first support beam; 15. second support beam; 16. scissor frame; 17. partition; 18. first one-way screw rod; 19. turning handle; 20. push plate; 21. push rod; 22. Limiting protrusion; 23. Sliding rod; 24. First bidirectional screw rod; 25. First threaded plate; 26. First support block; 27. Second unidirectional screw rod; 28. Turntable; 29. ​​Pressing plate; 30. Limiting rod; 31. T-shaped pressure strip; 32. T-shaped groove; 33. Second bidirectional screw rod; 34. Second threaded plate; 35. Second support block; 36. Frame; 37. Positioning pin; 38. Positioning socket; 39. Block; 40. Linear spring. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Radiotherapy is a treatment method that uses high-energy rays (such as X-rays, gamma rays, etc.) to destroy the DNA of cancer cells and prevent their growth and division. It is like a precise "scalpel" that can penetrate deep into the tumor tissue and attack cancer cells without directly contacting the body. Radiotherapy is mainly used for cancer treatment, covering various types of cancers such as head and neck tumors, chest tumors, abdominal tumors and pelvic tumors. It can be used for radical treatment of early cancer or palliative treatment of advanced cancer. The positioning device for radiotherapy is a device used to fix the patient's position during radiotherapy to ensure that the radiotherapy rays can act accurately on the lesion site to avoid radiation irradiation to other parts of the patient and reduce unnecessary damage;

[0030] Based on the findings in the prior art, most of the existing positioning devices for radiotherapy have fixed structures and are not easy to adjust. It is not easy to adaptively adjust the position of the positioning mechanism according to different radiotherapy patients. Since different radiotherapy patients mostly have different body shapes, the positioning devices for radiotherapy are not convenient for positioning different radiotherapy patients and have low applicability. In addition, the existing positioning devices for radiotherapy have a low level of intelligence and require manual operation of the positioning mechanism to position the patient's head. Not only is the degree of automation low, but the positioning clamping force on the patient's head cannot be intelligently adjusted, and good positioning comfort cannot be provided for the patient's head.

[0031] Embodiment 1

[0032] For the problems existing in the above-mentioned prior art, see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 This embodiment provides an intelligent positioning device for radiotherapy, comprising a mobile seat 1 with universal wheels at the four corners of the bottom and a positioning platform 2 located above the mobile seat 1, the positioning platform 2 is connected to the top of the mobile seat 1 through a liftable support mechanism, and the positioning platform 2 is driven by the liftable support mechanism to move up and down, so that the height of the positioning platform 2 can be adjusted according to actual needs;

[0033] A first motor 3 is fixed to the outer wall of the rear side of the positioning platform 2 by bolts, and bottom plates 4 are provided on both the front and rear sides of the top of the positioning platform 2. The front and rear groups of bottom plates 4 are driven by the first motor 3 and move in opposite directions. A top plate 5 is provided just above the bottom plate 4. The bottom plate 4 and the top plate 5 are fixedly connected by four symmetrically distributed support rods. A positioning film pressing mechanism is provided on the top plate 5. A trunk positioning film 6 for positioning the patient's trunk is provided between the bottom plate 4 and the top plate 5. The trunk positioning film 6 is a prior art product, and the front and rear sides of the trunk positioning film 6 are respectively pressed and fixed by two groups of positioning film pressing mechanisms.

[0034] A Velcro strap for fixing the patient's legs is fixed to the right side of the top of the positioning platform 2, a second motor 7 is fixed to the outer wall of the front side of the positioning platform 2 by bolts, two groups of concave seats 8 are arranged on the left side of the top of the positioning platform 2 and are symmetrically distributed front and back, and the two groups of concave seats 8 are driven by the second motor 7 and move in opposite directions, a vertical plate 9 is slidably connected to the inner side of the concave seat 8, and the vertical plate 9 is fixedly clamped in the concave seat 8 by an elastic positioning mechanism, and the side walls of the two groups of vertical plates 9 on opposite sides are symmetrically fixed with limiting springs 10, and the end of the limiting spring 10 away from the vertical plate 9 is fixedly connected to the positioning plate 11, and a fixed spring 10 is also arranged inside the limiting spring 10. A telescopic damping member is provided between the vertical plate 9 and the positioning plate 11. An elastic buffer pad 12 is sleeved on the side of the positioning plate 11 away from the vertical plate 9. The first motor 3 drives the two groups of bottom plates 4 on the front and rear sides of the top of the positioning platform 2 to move in opposite directions or in opposite directions. The two groups of bottom plates 4 are respectively adjusted to appropriate positions according to the physiques of different patients, so that the trunk positioning film 6 is pressed and fixed to the top of the bottom plate 4 by the positioning film pressing mechanism and the patient's trunk is positioned. At the same time, the vertical plate 9 is slidably connected in the concave seat 8 and positioned by the elastic positioning mechanism, so that the position of the elastic buffer pad 12 can be adaptively adjusted according to the position of the patient's head.

[0035] A pressure sensor 13 is fixed to the side wall of the vertical plate 9 close to the positioning plate 11 by bolts. The pressure sensor 13 is connected to the PLC control system of the device and is used to send an electrical signal to stop working to the second motor 7 when it is detected that the retraction distance (pressure value) of the positioning plate 11 reaches a preset value. The retraction force of the positioning plate 11 is detected in real time by the pressure sensor 13 on the vertical plate 9, and the second motor 7 is driven to stop working when it is detected that the pressure reaches the preset value, thereby realizing intelligent positioning and clamping of the patient's head.

[0036] The liftable support mechanism includes a first support beam 14 and a second support beam 15, wherein the first support beam 14 is provided with two groups and is slidably connected to the left and right sides of the inside of the moving seat 1, and the second support beam 15 is provided with two groups and is slidably connected to the left and right sides of the bottom end of the positioning platform 2, and the positions of the two groups of first support beams 14 and the two groups of second support beams 15 correspond one to one, and a retractable scissor frame 16 is hinged between the two groups of first support beams 14 and the two groups of second support beams 15 through a hinge, and the scissor frame 16 is provided with two groups and is symmetrically distributed front to back, and the first support beam 14 on the right side is driven and displaced laterally by a push-pull adjustment mechanism, and the first support beam 14 on the right side is driven to displace laterally by the push-pull adjustment mechanism, thereby driving the scissor frame 16 to be retracted and extended, and the positioning platform 2 is driven to rise and fall synchronously during the retraction and extension process of the scissor frame 16.

[0037] The push-pull adjustment mechanism includes a partition 17 and a first one-way screw 18, wherein the partition 17 is fixed to the right side inside the moving seat 1 by bolts, and the first one-way screw 18 is rotatably connected between the partition 17 and the right inner wall of the moving seat 1 through a bearing, and the right end of the first one-way screw 18 passes through the bearing to the outside of the moving seat 1 and is fixed with a turning handle 19, and a push plate 20 is threadedly sleeved on the first one-way screw 18, and a push rod 21 is symmetrically fixed to the side wall of the push plate 20 close to the first support beam 14, and the end of the push rod 21 away from the partition 17 slides through the partition 17 and is fixedly connected to the first support beam 14, and the first one-way screw 18 is driven to rotate by rotating the turning handle 19, so that the push plate 20 is displaced along the first one-way screw 18, and the push plate 20 is driven to move horizontally left and right through the push rod 21 during the movement of the push plate 20.

[0038] The first support beam 14 is fixed with limiting protrusions 22 on both the front and rear sides by bolts, and the front and rear side walls of the moving seat 1 are provided with limiting grooves, and the limiting grooves are adapted to the limiting protrusions 22, and the limiting protrusions 22 are slidably arranged in the limiting grooves to realize the sliding connection of the first support beam 14 on the inner side of the moving seat 1, and the bottom end of the positioning platform 2 is symmetrically fixed with fixed plates by bolts, and a sliding rod 23 that slides through the second support beam 15 is fixed between the two sets of fixed plates, and the sliding connection of the second support beam 15 on the bottom end of the positioning platform 2 is realized by the setting of the sliding rod 23.

[0039] The output end of the first motor 3 passes through the interior of the positioning platform 2 through a bearing and is fixed with a first bidirectional screw rod 24. Both sides of the first bidirectional screw rod 24 are threadedly sleeved with first threaded plates 25 and the threaded connection directions are opposite. The top of the first threaded plate 25 is fixed with a first support block 26 by bolts. The top of the first support block 26 slides through the top of the positioning platform 2 and is fixed to the bottom of the base plate 4. A through groove adapted to the first support block 26 is provided at the top of the positioning platform 2 for the first support block 26 to slide through. The first motor 3 drives the first bidirectional screw rod 24 to rotate, so that the first threaded plates 25 threadedly sleeved on both sides of the first bidirectional screw rod 24 are displaced toward or in opposite directions. During the movement of the first threaded plate 25, the base plate 4 is driven to move synchronously through the first threaded plate 25.

[0040] The positioning film pressing mechanism includes a second one-way screw 27 and a turntable 28, wherein the second one-way screw 27 is threaded through the top plate 5, and the turntable 28 is fixed to the top of the second one-way screw 27 by bolts. The bottom end of the second one-way screw 27 is located below the top plate 5 and is rotatably connected to a pressure plate 29 through a bearing. A symmetrically distributed limiting rod 30 is fixed to the top of the pressure plate 29 by bolts. The top of the limiting rod 30 slides through the top plate 5 to limit the pressure plate 29. A T-shaped pressure strip 31 is fixed to the bottom end of the pressure plate 29 by bolts, and a T-shaped groove 32 is provided at the top of the bottom plate 4. The T-shaped groove 32 is adapted to the T-shaped pressure strip 31. The second one-way screw 27 is driven to rotate downward by rotating the turntable 28. During the descent of the second one-way screw 27, the pressure plate 29 is driven to descend synchronously until the T-shaped pressure strip 31 is pressed into the T-shaped groove 32, thereby realizing the pressing and fixing of the torso positioning film 6.

[0041] The output end of the second motor 7 passes through the interior of the positioning platform 2 through a bearing and is fixed with a second bidirectional screw rod 33. Second threaded plates 34 are threadedly sleeved on both sides of the second bidirectional screw rod 33, and the threaded connection directions are opposite. A second support block 35 is fixed to the top of the second threaded plate 34 by bolts. The top of the second support block 35 slides through the top of the positioning platform 2 and is fixed to the bottom of the concave seat 8 by bolts. A through groove adapted to the second support block 35 is provided at the top of the positioning platform 2 for the second support block 35 to slide through. The second bidirectional screw rod 33 is driven to rotate by the second motor 7, so that the second threaded plates 34 threadedly sleeved on both sides of the second bidirectional screw rod 33 are displaced toward or in opposite directions. During the movement of the second threaded plate 34, the concave seat 8 is driven to displace synchronously through the second support block 35.

[0042] The elastic positioning mechanism includes a square frame 36 and a positioning pin 37, wherein the square frame 36 is provided with two groups and is fixed to the side walls on the opposite sides of the two groups of concave seats 8 by bolts, the positioning pin 37 slides through the square frame 36 and the concave seat 8, and the side of the vertical plate 9 close to the square frame 36 is provided with positioning holes 38 distributed at equal intervals, wherein the positioning holes 38 are adapted to the positioning pin 37, and the positioning and fixation between the concave seat 8 and the vertical plate 9 is achieved by inserting the positioning pin 37 into the positioning holes 38, and the positioning and fixation between the concave seat 8 and the vertical plate 9 is released by pulling the positioning pin 37 out of the positioning holes 38, and the positioning and fixation between the concave seat 8 and the vertical plate 9 is released, and a baffle 39 is fixedly sleeved on one side of the positioning pin 37 located in the square frame 36, and a linear spring 40 is connected between the inner wall of the side of the square frame 36 away from the concave seat 8 and the baffle 39, and the linear spring 40 is sleeved on the outside of the positioning pin 37, and the linear spring 40 provides an elastic ejection force for the baffle 39, so that the positioning pin 37 can be automatically inserted into the positioning hole 38.

[0043] Embodiment 2

[0044] With respect to the first embodiment, this embodiment provides a method for using an intelligent positioning device for radiotherapy, comprising the following steps:

[0045] Step 1: Pre-adjustment of the device

[0046] First, according to the required lying height of the patient during the actual radiotherapy process, the positioning table 2 is raised and lowered to the corresponding height using the lifting support mechanism. Then, the patient to be radiotherapy lies flat on the top of the positioning table 2, with the head facing left, the body is as close to the middle position of the upper surface of the positioning table 2 as possible, and the trunk is between the front and rear groups of bottom plates 4. Then, the vertical plate 9 is slid in the concave seat 8 to correspond to the position of the patient's head, and the vertical plate 9 is positioned and fixed using the elastic positioning mechanism to complete the pre-adjustment work of the intelligent positioning device for radiotherapy.

[0047] Step 2: Position the patient's torso

[0048] The first motor 3 on the rear outer wall of the positioning platform 2 is started to drive the two groups of bottom plates 4 on the top of the positioning platform 2 to move toward each other, and the two groups of bottom plates 4 are moved to corresponding positions according to the patient's trunk specifications. If the patient is fatter, the distance between the two groups of bottom plates 4 is larger, and if the patient is thinner, the distance between the two groups of bottom plates 4 is smaller. Then, the pre-made trunk positioning film 6 is covered on the patient's trunk (the trunk positioning film 6 is a prior art product, which is pre-made according to the patient's trunk size), and the front and rear ends of the trunk positioning film 6 are respectively placed on the top of the front and rear two groups of bottom plates 4, and the trunk positioning film 6 is kept in a tight state. At the same time, the trunk positioning film 6 is pressed and fixed to the top of the bottom plate 4 by a positioning film pressing mechanism, so that the tight trunk positioning film 6 is used to limit the patient's trunk position;

[0049] Step 3: Position the patient’s head

[0050] The second motor 7 driving the front outer wall of the positioning platform 2 drives the two groups of concave seats 8 at the top of the positioning platform 2 to drive the two groups of vertical plates 9 to move toward each other. During the displacement of the vertical plates 9, the positioning plates 11 are driven to move toward the patient's head until the elastic buffer pads 12 contact the patient's head. The vertical plates 9 continue to move, and the positioning plates 11 are blocked. Then, under the action of the limit spring 10, the vertical plates 9 continue to move toward the positioning plates 11 until the positioning plates 11 contact the pressure sensor 13. When the pressure sensor 13 detects that the pressure reaches the preset value, it indicates that the clamping force on the patient's head reaches the optimal comfort level. At this time, the pressure sensor 13 sends an electrical signal to the second motor 7 to stop working, and ends the continued clamping of the patient's head, so as to limit the patient's head with the two groups of elastic buffer pads 12.

[0051] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An intelligent positioning device for radiotherapy, comprising a mobile seat (1), characterized in that: The top of the movable seat (1) is connected to a positioning platform (2) via a liftable support mechanism; a bottom plate (4) driven to move by a first motor (3) is symmetrically provided at the middle position of the top of the positioning platform (2); a top plate (5) is fixed above the bottom plate (4); a positioning film pressing mechanism is provided on the top plate (5); a trunk positioning film (6) is fixed between the bottom plate (4) and the top plate (5) via the positioning film pressing mechanism; and a trunk positioning film (6) is symmetrically provided on one of the left and right sides of the top of the positioning platform (2) driven by a second motor (7) A displaceable concave seat (8), the inner side of which is slidably connected to a vertical plate (9), the vertical plate (9) and the concave seat (8) are fixedly connected via an elastic positioning mechanism, the side walls of the two groups of vertical plates (9) on opposite sides are connected to a positioning plate (11) via a limit spring (10), the side of the positioning plate (11) away from the vertical plate (9) is sleeved with an elastic buffer pad (12), and the side of the vertical plate (9) close to the positioning plate (11) is fixed with a pressure sensor (13) electrically connected to the second motor (7).

2. The intelligent positioning device for radiotherapy according to claim 1, characterized in that: The liftable support mechanism comprises a first support beam (14) slidably connected to both sides of the interior of the moving seat (1) and a second support beam (15) slidably connected to both sides of the bottom end of the positioning platform (2); two groups of the first support beams (14) and two groups of the second support beams (15) are hingedly connected by hinges with a scissor frame (16) symmetrically distributed in the front and rear; one of the two groups of the first support beams (14) is driven to move by a push-pull adjustment mechanism.

3. The intelligent positioning device for radiotherapy according to claim 2, characterized in that: The push-pull adjustment mechanism comprises a partition (17) fixed inside the movable seat (1) and a first one-way screw (18) rotatably connected between the partition (17) and the inner wall of the movable seat (1); one end of the first one-way screw (18) away from the partition (17) passes through the outside of the movable seat (1) through a bearing and is fixed with a turning handle (19); a push plate (20) is threadedly sleeved on the first one-way screw (18); and a push rod (21) that slides through the partition (17) is symmetrically fixed between the push plate (20) and the first support beam (14).

4. The intelligent positioning device for radiotherapy according to claim 2, characterized in that: The first support beam (14) is fixed with limiting protrusions (22) on both the front and rear sides, the front and rear side walls of the movable seat (1) are provided with limiting grooves adapted to the limiting protrusions (22), and the bottom end of the positioning platform (2) is fixed with a sliding rod (23) that slides through the second support beam (15).

5. The intelligent positioning device for radiotherapy according to claim 1, characterized in that: The output end of the first motor (3) passes through the interior of the positioning platform (2) through a bearing and is fixed with a first bidirectional screw rod (24); first threaded plates (25) are threadedly sleeved on both sides of the first bidirectional screw rod (24); and a first support block (26) is symmetrically fixed between the first threaded plate (25) and the bottom plate (4) and slides through the top of the positioning platform (2).

6. The intelligent positioning device for radiotherapy according to claim 1, characterized in that: The positioning film pressing mechanism comprises a second one-way screw (27) threadedly penetrating the top plate (5) and a turntable (28) fixed to the top end of the second one-way screw (27); the bottom end of the second one-way screw (27) is rotatably connected to a pressing plate (29); a limiting rod (30) slidably penetrating the top plate (5) is symmetrically fixed to the top end of the pressing plate (29); a T-shaped pressure strip (31) is fixed to the bottom end of the pressing plate (29); and a T-shaped groove (32) adapted to the T-shaped pressure strip (31) is provided at the top end of the bottom plate (4).

7. The intelligent positioning device for radiotherapy according to claim 1, characterized in that: The output end of the second motor (7) passes through the interior of the positioning platform (2) through a bearing and is fixed with a second bidirectional screw rod (33); second threaded plates (34) are threadedly sleeved on both sides of the second bidirectional screw rod (33); and a second support block (35) is fixed between the second threaded plate (34) and the concave seat (8) and is slidably passed through the top end of the positioning platform (2).

8. The intelligent positioning device for radiotherapy according to claim 1, characterized in that: The elastic positioning mechanism comprises a square frame (36) fixed to the side walls of the two groups of concave seats (8) on opposite sides and a positioning pin (37) slidingly passing through the square frame (36) and the concave seat (8); a side of the vertical plate (9) close to the square frame (36) is provided with positioning holes (38) adapted to the positioning pin (37) at equal distances; a blocking piece (39) is fixedly sleeved on one side of the positioning pin (37) located in the square frame (36); and a linear spring (40) sleeved on the outside of the positioning pin (37) is connected between the inner wall of the side of the square frame (36) away from the concave seat (8) and the blocking piece (39).

9. A method for using the intelligent positioning device for radiotherapy as claimed in claim 1, characterized in that: The following steps are involved: Step 1: first, the height of the positioning platform (2) is adjusted using the liftable support mechanism until the positioning platform (2) is lifted and lowered to the actual required height, and then the patient to be radiotherapy lies flat on the top of the positioning platform (2) with his head facing left, and then the vertical plate (9) is slid and adjusted to an appropriate position in the concave seat (8) according to the position of the patient's head, and the vertical plate (9) is positioned and fixed using the elastic positioning mechanism; Step 2: using the first motor (3) to drive the two sets of base plates (4) to move, and moving the two sets of base plates (4) to corresponding positions according to the trunk specifications of the patient, then covering the patient's trunk with a pre-made trunk positioning film (6), and placing the front and rear ends of the trunk positioning film (6) on the top of the base plate (4), and at the same time using a positioning film pressing mechanism to press and fix the trunk positioning film (6) on the top of the base plate (4), so as to limit the patient's trunk position using the trunk positioning film (6); Step 3: using the second motor (7) to drive the two groups of concave seats (8) to drive the two groups of vertical plates (9) to move toward each other, and during the displacement of the vertical plates (9), the positioning plates (11) are driven to move toward the patient's head until the elastic buffer pad (12) contacts the patient's head. The vertical plates (9) continue to move and continue to move toward the positioning plates (11) under the action of the limit spring (10) until they contact the pressure sensor (13). When the pressure sensor (13) detects that the pressure reaches a preset value, it indicates that the clamping force on the patient's head reaches the optimal comfort level. At this time, the pressure sensor (13) sends an electrical signal to stop working to the second motor (7), and ends the continued clamping of the patient's head, so as to limit the patient's head by using the two groups of elastic buffer pads (12).

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