Body position fixing device for leg tumor radiotherapy

Abstract

The invention relates to a leg tumor radiotherapy body position fixing device which comprises a bottom plate and two sets of leg fixing devices symmetrically arranged above the bottom plate, the leg fixing devices comprise thigh fixing devices, shank fixing devices and foot fixing devices, and the foot fixing devices and the shank fixing devices are connected together; the thigh fixing device and the shank fixing device are the same in structure and comprise U-shaped fixing plates, two adjusting rods are hinged to the side faces of the fixing plates, the other ends of the adjusting rods are hinged to stand columns on the bottom plate, and the thigh fixing device and the shank fixing device further comprise first locking mechanisms for fixedly connecting the adjusting rods and the stand columns; the fixing plate is provided with a jacking mechanism used for limiting the legs. The pedal in the foot fixing device can incline and rotate relative to the connecting plate. The leg tumor radiotherapy body position fixing device is suitable for effective fixing of various leg types and foot types, can record fixing marks, and improves the accuracy, repeatability and treatment effect in the radiotherapy process.

Description

Technical Field

[0001] The invention belongs to the technical field of tumor radiotherapy, and in particular relates to a body position fixing device for radiotherapy of leg tumors. Background Art

[0002] A tumor is a new growth formed by the proliferation of local tissue cells under the action of various tumorigenic factors. Since the muscle tissue of the legs is loose, the tumor is easy to expand and grow or spread along the tissue gap, which leads to the metastasis of tumor cells. The tumor can invade other functional organs through the blood circulation and lymphatic system. Therefore, for the treatment of this type of tumor, surgical resection and radiotherapy are usually adopted in clinical practice. Radiotherapy refers to the use of radiation to act on tumor cells, making the tumor cells inactive, thereby achieving a method of treating tumors. Generally, after surgical resection of the tumor lesion, external beam radiotherapy is used to perform radiotherapy on the lesion site and its surrounding tissues to completely kill tumor cells and prevent tumor recurrence. During radiotherapy treatment, a relatively important point is the stability of the irradiated part, which determines the effect of radiotherapy. Usually in the process of lower limb radiotherapy, the existing fixation method is generally natural placement, which has low repeatability, resulting in movement and deformation of the irradiated area, and low accuracy of lower limb radiotherapy positioning, which leads to unsatisfactory radiotherapy treatment effect. In addition, the existing fixation device is not suitable for patients with bent legs or abnormal foot shape, which greatly increases the difficulty of the treatment process. Therefore, it is necessary to provide a leg tumor radiotherapy position fixation device, which is suitable for effective fixation of various leg and foot shapes, and can record the fixation marks, thereby improving the accuracy, repeatability and treatment effect during radiotherapy. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a body position fixation device for radiotherapy of leg tumors, which is suitable for effective fixation of various leg and foot shapes and can record fixation marks, thereby improving the accuracy, repeatability and treatment effect during radiotherapy.

[0004] To solve the above problems, the technical solution adopted by the present invention is: A body position fixing device for radiotherapy of leg tumors, comprising a bottom plate and two groups of leg fixing devices symmetrically arranged above the bottom plate, wherein the leg fixing device comprises a thigh fixing device, a calf fixing device and a foot fixing device, and the foot fixing device is connected with the calf fixing device; The thigh fixing device and the calf fixing device have the same structure, both comprising a U-shaped fixing plate, two adjusting rods are hingedly connected to the side of the fixing plate, the other end of the adjusting rod is hingedly connected to the column on the bottom plate, and further comprising a first locking mechanism for fixing the adjusting rod to the column; a first tightening mechanism is arranged on the two vertical plates of the fixing plate, a mounting frame is arranged on the top of the fixing plate, and a second tightening mechanism is arranged on the mounting frame along the up-down direction; The foot fixing device includes a connecting plate horizontally fixedly connected to the front end of the horizontal plate of the fixing plate, a turntable is rotatably provided on the upper part of the connecting plate, a second locking mechanism is provided between the connecting plate and the turntable, a pedal is hingedly connected to the upper part of the turntable, and an adjusting rod is hingedly connected between the rear side of the pedal and the turntable; mounting plates are fixedly provided on the left and right ends of the pedal facing inward, a third tightening mechanism is provided on the mounting plate facing inward, a plurality of grooves are evenly opened on the upper part of the pedal along the left and right directions, and the grooves are equipped with straps.

[0005] As an embodiment of the present invention, a threaded rod is coaxially fixed to the top of the column, a sleeve is sleeved on the outside of the threaded rod, a top plate is arranged on the top of the sleeve and a through hole matching the threaded rod is opened in the middle of the top plate, a spring is sleeved inside the sleeve on the threaded rod, and a locking wrench is threadedly connected to the threaded rod above the sleeve; the first locking mechanism includes a plurality of lower latch teeth evenly fixed in a ring at the top of the column and a plurality of upper latch teeth evenly fixed in a ring at the bottom of the sleeve, and the spacing between the upper latch teeth is matched with the adjacent lower latch teeth; the other end of the adjustment rod hinged to the thigh fixing device and the calf fixing device is fixed to the outer wall of the sleeve.

[0006] As an embodiment of the present invention, the second locking mechanism includes a plurality of second card slots uniformly opened along the circumference of the edge of the rotating disk and extending vertically, a first card slot corresponding to the second card slot is opened at the outer edge of the connecting plate, and a card plate corresponding to the first card slot and the second card slot is also provided; The turntable is provided with an angle mark corresponding to each second slot, or a circular grating sensor is provided between the turntable and the connecting plate.

[0007] As an embodiment of the present invention, the adjusting rod is an electric screw, or, The adjusting rod comprises a sleeve and a telescopic rod inserted in the sleeve, the telescopic rod is provided with linear scales and markings along the length direction, and a locking bolt for tightening the telescopic rod is threadedly connected on the side wall of the sleeve.

[0008] As an embodiment of the present invention, the upper surface of the bottom plate is evenly provided with angular scales and marks around the column, and a pointer is vertically fixed at the lower part of the outer end of the adjustment rod hinged to the thigh fixing device and the calf fixing device, or, A circular grating sensor is provided between the adjusting rod hinged to the thigh fixing device and the calf fixing device and the column.

[0009] As an embodiment of the present invention, the first tightening mechanism, the second tightening mechanism and the third tightening mechanism are all electric screws, or, The first tightening mechanism, the second tightening mechanism and the third tightening mechanism are tightening screws threadedly connected to the vertical plate and the mounting plate. A buffer block is fixedly connected to the inner end of the tightening screw, and a handle is fixedly connected to the outer end.

[0010] As an embodiment of the present invention, C-shaped supports are fixedly provided on both sides of the bottom plate. A fourth tightening mechanism is vertically provided on the horizontal plate at the lower part of the support for fixing the bottom plate on the bed board.

[0011] As an embodiment of the present invention, the fixing plate in the thigh fixing device is larger in size than the fixing plate in the calf fixing device.

[0012] As an embodiment of the present invention, an arc-shaped protrusion corresponding to the popliteal fossa is provided on the upper surface of the front end of the transverse plate of the fixing plate in the thigh fixing device for positioning the knee.

[0013] As an embodiment of the present invention, one of the first tightening mechanisms is provided in the middle of each of the two vertical plates of the fixing plate, and one of the mounting brackets is provided at each of the front and rear ends of the fixing plate.

[0014] The beneficial effects produced by adopting the above technical solutions are as follows: The leg tumor radiotherapy position fixing device provided by the present invention has a separated design of the thigh fixing device and the calf fixing device. The foot fixing device can adjust the tilt angle and rotation angle of the pedal relative to the connecting plate, and is suitable for effective fixation of various leg shapes and foot shapes. During the initial fixation, various identification data are recorded through a record form, and during the later treatment process, the tightening mechanism, the adjusting rod and the relative angles between components in the fixing device are restored according to the initial recorded data, greatly improving the accuracy, repeatability and treatment effect during radiotherapy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the present invention.

[0016] Figure 2 is Figure 1 a partial enlarged schematic view of part A in

[0017] Figure 3 is another angle schematic structural diagram of the present invention.

[0018] Figure 4 is Figure 3 a partial enlarged schematic view of part B in

[0019] Figure 5 It is a schematic structural diagram of the thigh fixing device in the present invention.

[0020] Figure 6 It is a schematic structural diagram of a calf fixing device and a foot fixing device in the present invention.

[0021] Figure 7 yes Figure 6 A partial enlarged schematic diagram of point C in the middle.

[0022] Figure 8 It is a schematic cross-sectional view of the foot fixing device of the present invention.

[0023] Fig. 9 It is a structural schematic diagram of a column and a threaded rod in a foot fixing device of the present invention.

[0024] Fig.10 It is a schematic structural diagram of a sleeve in a foot fixing device of the present invention.

[0025] Fig.11 It is a schematic diagram of the structure of the sleeve in the foot fixing device of the present invention from another angle.

[0026] Among them: 100 thigh fixation devices, 200 calf fixation devices, 300 foot fixation devices; 1 bottom plate, 2 fixed plate, 201 horizontal plate, 202 vertical plate, 3 hinge seat, 4 adjusting rod, 401 sleeve, 402 telescopic rod, 403 linear scale, 404 locking bolt, 5 column, 501 lower tooth, 6 threaded rod, 7 sleeve, 701 upper tooth, 702 top plate, 703 through hole, 704 inner cylinder, 8 spring, 9 locking wrench, 10 angle scale, 1001 pointer, 11 first tightening mechanism, 1101 first buffer block, 1102 first handle, 12 Mounting frame, 13 second tightening mechanism, 1301 second buffer block, 1302 second handle, 14 connecting plate, 1401 first slot, 15 turntable, 1501 second slot, 16 first hinge axis, 17 pedal, 1701 second hinge axis, 18 mounting plate, 19 third tightening mechanism, 1901 third buffer block, 1902 third handle, 20 slot, 21 strap, 22 card plate, 23 support, 24 fourth tightening mechanism, 25 fourth handle, 26 protrusion. DETAILED DESCRIPTION

[0027] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention is clearly and completely described below in conjunction with specific embodiments.

[0028] like Figure 1-Figure 7A body position fixing device for radiotherapy of leg tumors shown in the figure comprises a base plate 1 and two groups of leg fixing devices symmetrically arranged on the base plate 1, wherein the leg fixing device comprises a thigh fixing device 100, a calf fixing device 200 and a foot fixing device 300, and the foot fixing device 300 is connected to the calf fixing device 200; The thigh fixing device 100 and the calf fixing device 200 have the same structure, both comprising a U-shaped fixing plate 2, the fixing plate 2 comprising a horizontal plate 201 and two vertical plates 202 vertically fixed on both sides thereof, two adjusting rods 4 are hingedly connected on the outer side surface (outer vertical plates 202) of the fixing plate 2, the other end of the adjusting rod 4 is hingedly connected to the column 5 at the edge of the bottom plate 2, and further comprising a first locking mechanism for fixing the adjusting rod 4 to the column 5; a first tightening mechanism 11 is arranged on the two vertical plates 202 of the fixing plate 2, an inverted U-shaped mounting frame 12 is arranged on the top of the fixing plate 2, and a second tightening mechanism 13 is arranged in the middle of the mounting frame 12 along the up-down direction; The foot fixing device 300 includes a connecting plate 14 horizontally fixedly connected to the front end of the transverse plate 201 of the fixing plate 2, the outer end of the connecting plate 14 is a semicircular plate, and a turntable 15 is rotatably provided on the upper part of the outer end of the connecting plate 14 through a first hinge shaft 16, the turntable 15 is coaxially arranged with the semicircular plate and has the same radius, a second locking mechanism is provided between the connecting plate 14 and the turntable 15, a pedal 17 is hingedly connected to the center of the upper part of the turntable 15 through a second hinge shaft 1701, and an adjusting rod 4 is hinged between the rear side of the pedal 17 and the turntable 15; mounting plates 18 are vertically fixedly provided at the left and right ends of the pedal 17 toward the inside, and a third tightening mechanism 19 is provided on the mounting plate 18 toward the inside, a plurality of long strip-shaped slots 20 are evenly opened on the upper part of the pedal 17 along the left and right directions, and the length direction of the slots 20 is arranged along the up and down direction of the pedal 17, and a strap 21 is provided at the slot 20, and an identification number is provided at each slot 20.

[0029] like Figure 8-Figure 11As shown, a threaded rod 6 is coaxially fixed on the top of the column 5, a sleeve 7 is sleeved on the outside of the threaded rod 6, a top plate 702 is provided on the top of the sleeve 7, and a through hole 703 adapted to the threaded rod 6 is opened in the middle of the top plate 702, and a spring 8 is sleeved inside the sleeve 7 on the threaded rod 6, the length of the spring 8 is greater than the height of the sleeve 7, and the free state is small, the spring 8 can lift the sleeve 7 to disengage the lower latching tooth 501 from the upper latching tooth 701, and the threaded rod 6 is above the sleeve 7 A locking wrench 9 is threadedly connected; the first locking mechanism includes a plurality of lower latching teeth 501 evenly fixed in a ring at the top of the column 5 and a plurality of upper latching teeth 701 evenly fixed in a ring at the bottom of the sleeve 7, the upper latching teeth 701 are adapted to the spacing between adjacent lower latching teeth 501, and the lower latching teeth 501 and the upper latching teeth 701 can be staggered and plugged together; the other end of the adjusting rod 4 hinged to the thigh fixing device 100 and the calf fixing device 200 is fixedly connected to the outer wall of the sleeve 7.

[0030] The adjusting rod 4 is hinged to the vertical plate 202 through a hinge seat 3. The hinge seat 3 is two parallel horizontal plates and a rotating shaft arranged between the two horizontal plates. In order to ensure that when the sleeve 7 moves up and down relative to the column 5, the adjusting rod 4 can move up and down as a whole to avoid interference, the distance between the two horizontal plates is greater than the outer dimensions of the hinged part of the adjusting rod 4, leaving a movable margin so that the adjusting rod 4 can move up and down slightly along the rotating shaft.

[0031] As a further optimization, an inner cylinder 704 is further provided inside the sleeve 7 , the inner cylinder 704 is sleeved on the threaded rod 6 , the top of the inner cylinder 704 is fixedly connected to the edge of the through hole 703 , and the spring 8 is located between the sleeve 7 and the inner cylinder 704 .

[0032] like Figure 1-Figure 4 As shown, as an embodiment, the second locking mechanism includes a plurality of second slots 1501 uniformly opened along the circumference of the edge of the turntable 15, and the first slots 1401 corresponding to the second slots 1501 are opened at the outer edge of the connecting plate 14, and a card plate 22 corresponding to the first slot 1401 and the second slot 1501 is also provided; after adjusting the position of the patient's foot, the relative position of the turntable 15 and the connecting plate 14 is locked by the card plate 22. An angle mark corresponding to each second slot 1501 is provided on the turntable 15. As another embodiment, a circular grating sensor is provided between the turntable 15 and the connecting plate 14 to detect the rotation angle of the turntable 15 relative to the connecting plate 14. By recording the angle mark or the degree of the circular grating sensor, the position of the turntable 15 is adjusted according to the recorded data during the next treatment, thereby ensuring the repeatability and stability of the fixed position.

[0033] like Figure 5As shown, as an embodiment, the adjusting rod 4 is an electric screw, and the telescopic length can be recorded by the controller. As another embodiment, the adjusting rod 4 includes a sleeve 401 and a telescopic rod 402 inserted in the sleeve 401, and the telescopic rod 402 is provided with a linear scale 403 and a mark along the length direction, and a locking bolt 404 for tightening the telescopic rod 402 is threadedly connected on the side wall of the sleeve 401, and the telescopic length of the telescopic rod 402 can be recorded by the linear scale 403 and the mark. By recording the length of the adjusting rod 4, the length of the adjusting rod 4 is adjusted according to the recorded data during the next treatment, thereby ensuring the repeatability and stability of the position fixation.

[0034] like Figure 1 , Figure 3 , Figure 5-Figure 7 As shown, as an embodiment, the upper surface of the base plate 1 is evenly provided with angular scales 10 and marks around the column 5, and a pointer 1001 is vertically fixed at the lower part of the outer end of the adjustment rod 4 hinged to the thigh fixing device 100 and the calf fixing device 200. As another embodiment, a circular grating sensor is provided between the adjustment rod 4 hinged to the thigh fixing device 100 and the calf fixing device 200 and the column 5. Specifically, the circular grating sensor is provided between the sleeve 7 and the column 5 to detect the rotation angle of the adjustment rod 4 relative to the column 5. The rotation angle of the adjustment rod 4 relative to the column 5 is recorded by recording data, and the rotation angle is adjusted according to the recorded data during the next treatment, thereby ensuring the repeatability and stability of the body position fixation.

[0035] like Figure 1 , Figure 3 , Figure 5 and Figure 6 As shown, as an embodiment, the first tightening mechanism 11, the second tightening mechanism 13 and the third tightening mechanism 19 are all electric screws, and the telescopic length can be recorded by the controller. As another embodiment, the first tightening mechanism 11, the second tightening mechanism 13 and the third tightening mechanism 19 are tightening screws threadedly connected to the vertical plate 202 and the mounting plate 18, the inner end of the tightening screw is fixedly connected with a buffer block, and the outer end is fixedly connected with a handle. The elongation length of the inner end of the tightening screw can be measured by a measuring ruler. In addition, the tightening mechanism can also adopt the same structure as the adjusting rod 4. Specifically, the inner ends of the first tightening mechanism 11, the second tightening mechanism 13 and the third tightening mechanism 19 are respectively fixedly connected with the first buffer block 1101, the second buffer block 1301 and the third buffer block 1901, and the outer ends are respectively fixedly connected with the first handle 1102, the second handle 1302 and the third handle 1902. The telescopic length of the tightening mechanism is recorded by recording data, and the telescopic length of the tightening mechanism is adjusted according to the recorded data during the next treatment, thereby ensuring the repeatability and stability of body position fixation.

[0036] As shown in Figure 1 and Figure 3 shown, on both sides of the bottom plate 1, there are fixedly arranged U-shaped supports 23. On the horizontal plate at the lower part of the support 23, a fourth tightening mechanism 24 is vertically arranged for fixing the bottom plate 1 on the bed board. In this embodiment, the fourth tightening mechanism 24 is a tightening screw bolt screwed on the horizontal plate, and the lower end of the tightening screw bolt is fixedly connected with a fourth handle 25.

[0037] Since the diameter of the thigh is larger than that of the calf, the size of the thigh fixing device 100 is larger than that of the calf fixing device 200. In this embodiment, the size of the fixing plate 2 in the thigh fixing device 100 is larger than that of the fixing plate 2 in the calf fixing device 200.

[0038] As a further optimization, referring to Figure 3 , on the upper surface of the front end of the transverse plate 201 of the fixing plate 2 in the thigh fixing device 100, there is an arc-shaped protrusion 26 corresponding to the popliteal fossa for positioning the knee and can assist the patient in placing the leg.

[0039] In the middle of each of the two vertical plates 202 of the fixing plate 2, there is one of the first tightening mechanisms 11. At the front and rear ends of the fixing plate 2, there is one mounting bracket 12 and one second tightening mechanism 13 respectively, and the leg fixing stability is good.

[0040] Specific usage process: When the patient undergoes the first chemotherapy, first fix the bottom plate 1 on the bed board 1 through the support 23 and the fourth tightening mechanism 24. Then, place the patient's thigh and calf in the fixing plates 2 of the thigh fixing device 100 and the calf fixing device 100 respectively, and place the heel on the turntable 15 and the sole on the pedal 17. Adjust the patient's leg and foot to the most comfortable state; Then, use the third tightening mechanism 19 to tighten and limit both sides of the heel, and record the extended position of the third tightening mechanism 19; pass the strap 21 through the two closest through slots 20 on both sides of the sole to tie up the sole, and record the identification number of the through slot 20 through which the strap 21 passes; lock the position of the adjusting rod 4 between the pedal 17 and the turntable 15, and record the length of the adjusting rod 4; use the clamping plate 22 to clamp the turntable 15 and the connecting plate 14 to prevent relative rotation, and record the angle identification of the second slot 1501 opposite to the first slot 1401 at this time; Use the first tightening mechanism 11 and the second tightening mechanism 13 to tighten and limit both sides and the upper part of the patient's leg, and record the extended positions of the first tightening mechanism 11 and the second tightening mechanism 13; The position of the adjusting rod 4 hinged on the side of the fixing plate 2 is locked, and the length of the adjusting rod 4 is recorded; the locking wrench 9 is tightened to engage the upper locking tooth 701 at the lower part of the sleeve 7 and the lower locking tooth 501 at the upper end of the column 5, and the angular scale 10 corresponding to the pointer 1001 is recorded at this time.

[0041] When performing subsequent chemotherapy, first adjust and lock the length of the adjusting rod 4 hinged on the side of the fixing plate 2 and its angle relative to the column 5 according to the data recorded initially; adjust and lock the rotation angle of the turntable 15 relative to the connecting plate 14 according to the data recorded initially; adjust and lock the length of the adjusting rod 14 of the diameter of the turntable 15 and the pedal 17 according to the data recorded initially; The patient's legs are placed in the fixing plates 2 of the thigh fixing device 100 and the calf fixing device 100, and the heels are placed on the turntable 15, the soles of the feet are attached to the pedals 17, and the straps 21 are passed through the recorded slots 20 according to the initial recorded data to comfort the soles of the feet; The first tightening mechanism 11 , the second tightening mechanism 13 and the third tightening mechanism 19 are used to limit the position of the legs and the heels.

[0042] The thigh fixing device 100 and the calf fixing device 200 in the leg tumor radiotherapy position fixing device are designed separately, and the foot fixing device 300 can adjust the inclination angle and rotation angle of the pedal 17 relative to the connecting plate 14, which is suitable for effective fixing of various leg and foot shapes. During the initial fixation, various identification data are recorded through a record sheet, and the relative angles between the tightening mechanism, the adjustment rod 4 and the components in the fixing device are restored according to the initial recorded data during the later treatment process, which greatly improves the accuracy, repeatability and treatment effect during the radiotherapy process.

[0043] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A body position fixation device for radiotherapy of leg tumors, characterized in that: It comprises a bottom plate (1) and two groups of leg fixing devices symmetrically arranged above the bottom plate, wherein the leg fixing devices comprise a thigh fixing device (100), a calf fixing device (200) and a foot fixing device (300), and the foot fixing device (300) is connected to the calf fixing device (200); The thigh fixing device (100) and the calf fixing device (200) have the same structure, and both comprise a U-shaped fixing plate (2), wherein two adjusting rods (4) are hingedly connected to the side of the fixing plate (2), and the other end of the adjusting rod (4) is hingedly connected to the column (5) on the bottom plate (2), and further comprises a first locking mechanism for fixing the adjusting rod (4) and the column (5) together; a first tightening mechanism (11) is arranged on the two vertical plates (202) of the fixing plate (2), and a mounting frame (12) is arranged on the top of the fixing plate (2), and a second tightening mechanism (13) is arranged on the mounting frame (12) along the up-down direction; The foot fixing device (300) comprises a connecting plate (14) horizontally fixedly connected to the front end of the transverse plate (201) of the fixing plate (2); a turntable (15) is rotatably provided on the upper part of the connecting plate (14); a second locking mechanism is provided between the connecting plate (14) and the turntable (15); a pedal (17) is hingedly connected to the upper part of the turntable (15); an adjusting rod (4) is hingedly connected between the rear side of the pedal (17) and the turntable (15); mounting plates (18) are fixedly provided on the left and right ends of the pedal (17) facing inwards; a third tightening mechanism (19) is provided on the mounting plate (18) facing inwards; a plurality of slots (20) are evenly provided on the upper part of the pedal (17) along the left and right directions; and a strap (21) is provided at the slots (20).

2. A body position fixation device for radiotherapy of leg tumors according to claim 1, characterized in that: A threaded rod (6) is coaxially fixed to the top of the column (5), a sleeve (7) is sleeved on the outside of the threaded rod (6), a top plate (702) is provided on the top of the sleeve (7), and a through hole (703) matching the threaded rod (6) is opened in the middle of the top plate (702), a spring (8) is sleeved inside the sleeve (7) on the threaded rod (6), and a locking wrench (9) is threadedly connected to the threaded rod (6) above the sleeve (7); the first locking mechanism comprises a plurality of lower latching teeth (501) uniformly fixed in an annular shape on the top of the column (5) and a plurality of upper latching teeth (701) uniformly fixed in an annular shape on the bottom of the sleeve (7), and the spacing between the upper latching teeth (701) and adjacent lower latching teeth (501) is matched; the other end of the adjustment rod (4) hinged to the thigh fixing device (100) and the calf fixing device (200) is fixed to the outer wall of the sleeve (7).

3. A body position fixation device for radiotherapy of leg tumors according to claim 2, characterized in that: The second locking mechanism comprises a plurality of second card slots (1501) uniformly arranged along the circumference of the edge of the rotating disk (15) and extending vertically therethrough; a first card slot (1401) corresponding to the second card slot (1501) is arranged at the outer edge of the connecting plate (14); and a card plate (22) corresponding to the first card slot (1401) and the second card slot (1501) is also provided. An angular identifier corresponding to each second card slot (1501) is provided on the turntable (15), or, a circular grating sensor is provided between the turntable (15) and the connecting plate (14).

4. The device for fixing the body position for radiotherapy of leg tumors according to claim 1, characterized in that: The adjusting rod (4) is an electric screw rod, or, The adjusting rod (4) includes a sleeve (401) and a telescopic rod (402) inserted into the sleeve (401). A linear scale (403) and an identifier are provided along the length direction of the telescopic rod (402). A locking bolt (404) for tightening the telescopic rod (402) is threadedly connected to the side wall of the sleeve (401).

5. The body position fixation device for radiotherapy of leg tumors according to claim 4, characterized in that: Circular scales (10) and identifiers are evenly arranged circumferentially around the column (5) on the upper surface of the bottom plate (1). A pointer (1001) is vertically fixed to the lower part of the outer end of the adjusting rod (4) hinged to the thigh fixing device (100) and the calf fixing device (200), or, A circular grating sensor is provided between the adjusting rod (4) hinged to the thigh fixing device (100) and the calf fixing device (200) and the column (5).

6. The device for fixing the body position for radiotherapy of leg tumors according to claim 1, characterized in that: The first tightening mechanism (11), the second tightening mechanism (13) and the third tightening mechanism (19) are all electric screw rods, or, The first tightening mechanism (11), the second tightening mechanism (13) and the third tightening mechanism (19) are tightening screw rods threadedly connected to the vertical plate (202) and the mounting plate (18). A buffer block is fixedly connected to the inner end of the tightening screw rod, and a handle is fixedly connected to the outer end.

7. A body position fixation device for radiotherapy of leg tumors according to any one of claims 1 to 6, characterized in that: C-shaped supports (23) are fixedly provided on both sides of the bottom plate (1). A fourth tightening mechanism (24) is vertically provided on the horizontal plate at the lower part of the support (23) for fixing the bottom plate (1) on the bed board.

8. The body position fixation device for radiotherapy of leg tumors according to claim 7, characterized in that: The size of the fixing plate (2) in the thigh fixing device (100) is larger than the size of the fixing plate (2) in the calf fixing device (200).

9. The body position fixation device for radiotherapy of leg tumors according to claim 8, characterized in that: An arc-shaped protrusion (26) corresponding to the popliteal fossa is provided on the upper surface of the front end of the transverse plate (201) of the fixing plate (2) in the thigh fixing device (100) for positioning the knee.

10. The body position fixation device for radiotherapy of leg tumors according to claim 7, characterized in that: One of the first tightening mechanisms (11) is provided in the middle of each of the two vertical plates (202) of the fixing plate (2), and one mounting bracket (12) is provided at each of the front and rear ends of the fixing plate (2).

Images