CN114569900A - Pelvic cavity and abdominal cavity radiotherapy positioning device and method - Google Patents

Abstract

The invention belongs to the technical field of medical equipment, and discloses a pelvic cavity radiotherapy positioning device which comprises a machine tool body, a back frame plate and a telescopic plate, wherein one end of the back frame plate is connected with the telescopic plate in a sliding manner, one end of the telescopic plate, which is far away from the back frame plate, is rotatably connected with a seat plate, one end, which is far away from the telescopic plate, of the back frame plate is provided with a neck pillow, two sides of one end, which is close to the back frame plate, below the seat plate are fixedly connected with telescopic rods, one end, which is close to the neck pillow, below the middle part below the back frame plate is fixedly connected with a driver, the output end of the driver is fixedly connected with a driving screw rod, the middle part above the seat plate is provided with a pressure detection plate, one end, which is close to the neck pillow, above the back frame plate is provided with a plurality of pressure detection strips at equal intervals, two sides above the back frame plate are provided with a plurality of back plate beam grooves at equal intervals, the invention can adjust the body position angle of a patient from each angle in a mode of linkage with the machine tool body and a fixed frame, the positioning precision is high, and the body position repeatability is high.

Description

Pelvic cavity and abdominal cavity radiotherapy positioning device and method

Technical Field

The invention belongs to the technical field of medical equipment, and particularly relates to a pelvic cavity radiotherapy positioning device and method.

Background

Tumor radiotherapy is a local treatment for tumors using radiation. The radiation includes alpha, beta and gamma rays generated by radioactive isotopes, and x-rays, electron beams, proton beams and other particle beams generated by various x-ray therapeutic machines or accelerators. About 70% of cancer patients require radiation therapy in the course of cancer treatment, and about 40% of cancers can be cured by radiation therapy. The role and position of radiotherapy in tumor treatment are increasingly prominent, and it has become one of the main means for treating malignant tumors, and in order to achieve precise irradiation, many fixing devices are designed, such as: the device comprises a foundation ring, a mask, a vacuum fixing cushion, a pleura and the like, and aims to limit the random movement of a human body to the maximum extent and ensure the high repeatability and consistency of body surface positioning marks, thereby realizing accurate positioning. However, the existing radiotherapy positioning frame is mostly local, such as: a head and neck radiotherapy fixing frame, a chest radiotherapy positioning frame and the like, so that the radiotherapy in each time is difficult to reset consistently in clinical work. Each patient is irradiated for about 30 times in a treatment course, and the change of the treatment posture causes the displacement of irradiation in each irradiation, which can cause the radiation damage of normal tissues and the radiation omission of tumor tissues.

Disclosure of Invention

The invention aims to provide a pelvic cavity radiotherapy positioning device and a method for measuring the shape and the size of a stoma by a measuring module, then cutting the stoma bag by the corresponding size by the matching of a cutting module and a cutting lining plate, processing the cutting surface of the cutting opening and preventing the discomfort of a patient caused by the friction of the incision on the stoma.

Based on the purpose, the invention adopts the following technical scheme: the utility model provides a pelvic cavity radiotherapy positioner, including back frame plate and expansion plate, the one end sliding connection of back frame plate has the expansion plate, the one end that the back frame plate was kept away from to the expansion plate rotates and is connected with the seat, the one end that the expansion plate was kept away from to the top of back frame plate is provided with the neck pillow, the equal fixedly connected with telescopic link in one end both sides that the seat below is close to the back frame plate, the one end fixedly connected with driver that the neck pillow is close to in back frame plate below middle part, the output fixedly connected with driving screw of driver, the top middle part of seat is provided with pressure detection board, the one end equidistance that the top of back frame plate is close to the neck pillow is provided with a plurality of pressure detection strips, the equipartition in top both sides of back frame plate is provided with a plurality of back plate strap grooves, still be equipped with on the back frame plate with lathe body matched with location auxiliary membrane.

Preferably, both sides of one end, away from the back frame plate, of the seat plate are fixedly connected with leg connecting seats, one ends, away from the seat plate, of the two leg connecting seats are fixedly connected with one-way rotating seats, ratchet wheel limiters are arranged above the two one-way rotating seats, one ends, away from the seat plate, of the two leg connecting seats are rotatably connected with first rotating seats through the one-way rotating seats, thigh fixing rods are fixedly connected with one ends, away from the seat plate, of the two first rotating seats, second rotating seats are fixedly connected with one ends, away from the first rotating seats, of the two thigh fixing rods, the two thigh fixing rods are rotatably connected with shank fixing rods through the second rotating seats, and a plurality of leg strap grooves are formed in both sides of the two thigh fixing rods and the shank fixing rods; seat bottom fixedly connected with bottom plate, the one end both sides that the bottom plate is close to the neck pillow all rotate and are connected with electric putter, and the bottom plate is close to flexible one end both sides and all is provided with the collateral branch fagging, the equal fixedly connected with universal connecting seat in the below middle part of bottom plate and collateral branch fagging.

Preferably, the bottom of bottom plate is through three universal connecting seat respectively with six flexible arm swing joint of lathe body, the one end that the bottom plate was kept away from to two electric putter all rotates with the back frame plate to be connected, the junction of expansion plate and seat is provided with angle sensor, two first rotation seats all are provided with the rotation knob with the outside middle part of two second rotation seats, the thigh dead lever is adjustable length's telescopic link, inside including the slant elasticity cardboard with shank connecting seat sliding connection of unidirectional rotation seat, with first rotation seat fixed connection's one-way ratchet and be located the spacing spring of slant elasticity cardboard below.

Preferably, the machine tool body also comprises a base body, a connecting piece and a rotating support, the machine tool body is arranged on the base body and is in sliding connection with the base body through a sliding groove at the bottom of the machine tool body, a hydraulic system and a hydraulic arm driven by the hydraulic system are arranged in the base body, the machine tool body is driven by the hydraulic arm to slide on the base body, the connecting piece is arranged at each of two ends of the base body and comprises a rotating shaft and a connecting sliding sleeve fixedly connected with the rotating shaft, the rotating support is a round support fixed horizontally, two ends of the base body are rotatably connected with the connecting piece through the rotating shaft, the base body is erected on the rotating support through the connecting sliding sleeve and rotates in the plane of the rotating support, the rotating support and the rotating shaft are provided with angle scales along the circumferential direction, the base body is provided with length scales along the length direction, the machine tool body is provided with a side wing plate, the side wing plate is rotatably connected with the machine tool body, head clamping grooves are arranged at two sides of the upper part of the machine tool body corresponding to the head position, the middle part is provided with a body part positioning clamping groove, and the machine tool body is provided with a transverse bandage.

Preferably, at least three support columns are arranged below the rotating support at equal intervals, the support columns are connected to the bottom surface of the rotating support, a hydraulically-driven lifting base is arranged at the bottom of each support column, and the connecting sliding sleeve is a semicircular sliding sleeve sleeved on the upper half part of the rotating support.

Preferably, the back frame plate is provided with a fixing frame, the fixing frame is provided with a chest and abdomen positioning groove, and two sides of the chest and abdomen positioning groove on the fixing frame are respectively provided with a plurality of pressing mechanisms for pressing the positioning mechanisms; the positioning mechanism comprises a lower positioning film, an upper positioning film and a vacuum pad, wherein the lower positioning film is arranged in the chest and abdomen positioning groove and is connected with the fixing frame; the vacuum pads are two, wherein one vacuum pad is adhered to the bottom surface of the upper positioning film, and the other vacuum pad is adhered to the top surface of the lower positioning film.

Preferably, clamping plates used for being connected with the fixing frame are respectively arranged on two sides of the upper positioning film and two sides of the lower positioning film, and each clamping plate comprises a top plate, a bottom plate and a side plate for connecting the top plate and the bottom plate; the top plate and the bottom plate are respectively provided with a tightening screw, the nut end of the tightening screw is positioned in the top plate or the bottom plate, the screw end of the tightening screw penetrates through the top plate or the bottom plate, and the fixing frame is respectively provided with a plurality of positioning columns at two sides of the thoracoabdominal positioning groove; the clamping plate is provided with positioning holes which correspond to the positioning columns one by one, the pressing mechanism comprises a fixed plate connected with the fixed frame, a fixed rod connected with the fixed plate, a sliding sleeve which is nested on the fixed rod and can slide up and down along the fixed rod, and a pressing block which is rotatably connected with the sliding sleeve through an eccentric rotating shaft, and a plurality of annular grooves are formed in the sliding sleeve at intervals along the sliding direction; the top end of the fixed rod is provided with an annular convex block which protrudes outwards; the annular convex block is clamped with one of the annular grooves, and the fixing frame is provided with a head positioning groove and a leg positioning groove; the fixing frame is provided with binding bands at two sides of the leg positioning groove, and the top surface of the fixing frame is provided with two strip-shaped grooves above the chest and abdomen positioning grooves; a conveying mechanism is arranged in each strip-shaped groove; the conveying mechanism comprises two transmission shafts arranged at intervals and a conveying belt sleeved on the two transmission shafts; the conveyor belt is provided with a handheld holding rod; the transmission shaft is arranged in the elongated groove through the fixing block, and the handheld holding rod comprises a fixing sleeve arranged on the conveyor belt, a pressure rod with the lower part embedded in the fixing sleeve, a spring with one end fixedly connected to the bottom surface of the pressure rod, and a pressing block connected with the other end of the spring.

Preferably, still be equipped with on the frame plate of back and fix a position supplementary membrane with lathe body matched with, the membrane body including fixed frame and latticed, the outward flange and the fixed frame of membrane body are connected, fixed frame includes bottom plate and clamp plate, be provided with a plurality of double-screw bolts that distribute along bottom plate length direction on the up end of bottom plate, stretch out outside the clamp plate and threaded connection has the hand to twist the nut after the activity of double-screw bolt upper end runs through the clamp plate, be provided with a pair of chimb that can offset with the finger in order to rotate the hand and twist the nut on the lateral wall of hand twist nut, it is equipped with first rubber strip to inlay on the inboard bottom plate of double-screw bolt, be provided with the first caulking groove that can supply first rubber strip embedding on the bottom plate, it is equipped with the second rubber strip that corresponds the setting with first rubber strip to inlay on the lower terminal surface of clamp plate, be provided with the second caulking groove that can supply second rubber strip embedding on the lower terminal surface of clamp plate, first rubber strip and second rubber strip compress tightly respectively on the lower terminal surface and the up end surface of membrane body.

Preferably, a first arc-shaped guide surface which can be matched with the first rubber strip for guiding so as to facilitate the first rubber strip to be embedded into the first caulking groove is arranged on the inner side wall of the opening end of the first caulking groove; through the arrangement of the first arc-shaped guide surface, when the first rubber strip is assembled, the first rubber strip can be more conveniently embedded into the first caulking groove, and a second arc-shaped guide surface which can be matched with the second rubber strip for guiding so as to facilitate the second rubber strip to be embedded into the second caulking groove is arranged on the inner side wall of the opening end of the second caulking groove; through the arrangement of the second arc-shaped guide surface, when the second rubber strip is assembled, the second rubber strip can be more conveniently embedded into the second embedding groove, and a plurality of first anti-skid convex ribs distributed from inside to outside are arranged on the upper end surface of the first rubber strip; the friction force between the first rubber strip and the membrane body can be increased through the arrangement of the first anti-skid convex rib, so that the membrane body can be better compressed by the first rubber strip, and the vertical section of the first anti-skid convex rib is of a sawtooth structure; by adopting the structure, the friction force between the first rubber strip and the membrane body can be further increased, so that the membrane body can be better compressed by the first rubber strip, and a plurality of second anti-skid convex ribs distributed from inside to outside are arranged on the lower end surface of the second rubber strip; the friction force between the second rubber strip and the membrane body can be increased through the arrangement of the second anti-skid convex ribs, so that the membrane body can be better compressed by the second rubber strip, and the vertical cross sections of the second anti-skid convex ribs are of a sawtooth structure; after adopting this kind of structure, can further increase the frictional force between second rubber strip and the diaphragm body, so, the diaphragm body that compresses tightly that the second rubber strip can be better.

Preferably, a pelvic cavity radiotherapy positioning method,

s1, lowering the whole back frame plate to the lowest position by using a machine tool body, enabling a patient to lie on the back frame plate after the back frame plate is laid flat by an electric push rod, and then laying a positioning auxiliary film on the abdominal cavity of the patient;

s2, firstly adjusting the lengths of the telescopic plate and the thigh fixing rod according to the height of a patient, fixing the trunk and the legs of the patient by a bridle, and then adjusting the supine position and the leg position according to the position needing chemotherapy;

s3, the machine tool body adjusts the posture transformation process during primary radiotherapy, well adjusts the deviation position during preview, and simultaneously records pressure data under each posture through the pressure detection plate and the pressure detection strips;

s4, after the rehearsal is finished, resetting the body frame plate, starting a radiotherapy program, and adjusting and transforming the posture according to the rehearsal deviation position and data; s5, after radiotherapy is finished, lowering the body frame plate to the lowest position through the machine tool body, and after the bridle is opened to release the patient, resetting the back frame plate and the thigh fixing rod;

s6, when the fixing frame and the positioning auxiliary membrane are combined, the back splint is lowered to the lowest position by using the machine tool body, then the patient lies down on the fixing frame, the head is fixed through the head fixing groove and the neck pillow, and then the positioning auxiliary membrane is covered on the abdominal cavity of the patient and is fixed with the fixing frame;

s7, the patient is tightly fixed on the back frame plate through the side wing plates, the transverse binding bands, the leg positioning grooves and the binding bands, and then the inclination angle of the body of the patient is adjusted through the rotary fixing frame under the action of the rotary support, so that the radiotherapy positions can be conveniently determined at different positions.

Compared with the prior art, the invention has the following beneficial effects: the thigh fixing rod and the shank fixing rod are matched with the unidirectional rotating seat, the first rotating seat and the second rotating seat, posture adjustment and fixation can be carried out on the lower body position of a patient, the patient does not need to be fixed by the patient, the comfort of the patient is improved, the posture flexibility is higher, the adjustment allowance is larger, the practicability of the machine is improved, when the patient lies on the machine tool body, the position of the machine tool body relative to a base body can be adjusted through the sliding groove and the hydraulic arm, the rotating angle of the machine tool body can be adjusted through the adjustment of the connecting sliding sleeve, the radiotherapy radiation field angle suitable for the patient can be adjusted through the combination of the sliding groove and the hydraulic arm, the adjustment is carried out through the combination of rotation and movement, the process of finding and positioning is relatively simple and convenient, and the higher efficiency is realized compared with the translation of a radiotherapy bed in the prior art; in addition, the machine tool body can also rotate through the rotating shaft, and the support can be provided through the side wing plate at the moment, so that the patient can be conveniently subjected to radiotherapy from the side surface, the posture that the patient needs to lie on the side in the side radiotherapy in the prior art is avoided, the problem that the radiotherapy position is deviated due to vibration easily caused by the fact that the patient lies on the side is avoided, the lower positioning film is arranged in the chest and abdomen positioning groove and used for positioning the back of the patient lying on the back, the lower positioning film can be firmly attached to the back of the patient, and the problem that the treatment effect is influenced by the micromotion of the patient due to the gap between the back of the patient and the fixing frame is avoided; the positioning surface of the upper positioning film or the lower positioning film can be bonded with a vacuum pad, the vacuum pad is formed according to the supine posture of the patient after being exhausted, the gap between the upper positioning film or the lower positioning film and the patient can be filled, the positioning precision is further improved, the positioning of the vacuum pad is less influenced by the subjective factors of a radiotherapy doctor, and the movement of the field center is less.

Drawings

Fig. 1 is a schematic perspective view of a back shelf of the present invention;

fig. 2 is a front view of the back shelf of the present invention;

fig. 3 is a schematic bottom view of the back frame plate of the present invention;

FIG. 4 is a top view of the machine body of the present invention;

FIG. 5 is a schematic view of the holder of the present invention;

FIG. 6 is a schematic view of the chest and abdomen positioning slot of the present invention;

FIG. 7 is a schematic view of the positioning mechanism of the present invention;

FIG. 8 is an enlarged partial view of the clamping plate of the present invention;

FIG. 9 is a schematic view of the transfer mechanism of the present invention;

FIG. 10 is a schematic view of a handheld grip of the present invention;

FIG. 11 is a schematic view of a positioning aid membrane of the present invention;

FIG. 12 is a pictorial illustration of the fixed frame lamination end face of the present invention;

fig. 13 is a partially enlarged schematic view of the fixed laminated film of the present invention.

In the figure: the back frame plate 1, the expansion plate 2, the seat plate 3, the neck pillow 4, the leg connecting seat 5, the unidirectional rotating seat 6, the first rotating seat 7, the thigh fixing rod 8, the second rotating seat 9, the shank fixing rod 10, the ratchet limiter 11, the pressure detecting plate 12, the pressure detecting strip 13, the bottom plate 14, the side supporting plate 15, the universal connecting seat 16, the electric push rod 17, the expansion rod 18, the driver 19, the driving screw 20, the back plate strap groove 21, the leg strap groove 22, the rotating bracket 23, the connecting sliding sleeve 24, the rotating shaft 25, the transverse binding belt 26, the side wing plate 27, the fixing frame 28, the head positioning groove 29, the pressing mechanism 30, the elongated groove 31, the handheld holding rod 32, the conveying mechanism 33, the positioning mechanism 34, the leg positioning groove 35, the binding belt 36, the chest and abdomen positioning groove 37, the positioning column 38, the lower positioning film 39, the vacuum cushion 40, the upper positioning film 41, the clamping plate 42, the top plate 421, the back plate, The film pressing device comprises a bottom plate 422, a side plate 423, a fixing block 43, a transmission shaft 44, a pressing rod 45, a fixing sleeve 46, a spring 47, a pressing block 48, a positioning auxiliary film 49, a fixing frame 50, a latticed film body 51, a film pressing bottom plate 56, a film pressing plate 55, a stud 54, a hand-screwed nut 52, a convex edge 53, a first rubber strip 57, a second rubber strip 58, a first anti-skidding convex rib 59, a second anti-skidding convex rib 60, a first embedding groove 61 and a second embedding groove 62.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.

Example one

The pelvic cavity radiotherapy positioning device shown in figures 1-5 comprises a machine tool body, back frame plate 1 and expansion plate 2, the one end sliding connection of back frame plate 1 has expansion plate 2, the one end that expansion plate 2 kept away from back frame plate 1 rotates and is connected with seat 3, the one end that expansion plate 2 was kept away from to the top of back frame plate 1 is provided with neck pillow 4, the equal fixedly connected with telescopic link 18 in one end both sides that seat 3 below was close to back frame plate 1, the one end fixedly connected with driver 19 of neck pillow 4 is close to in the middle part of back frame plate 1 below, driver 19's output end fixedly connected with driving screw 20, the top middle part of seat 3 is provided with pressure detection board 12, the one end equidistance that the top of back frame plate 1 is close to neck pillow 4 is provided with a plurality of pressure detection strip 13, the equal equidistance in top both sides of back frame plate 1 is provided with a plurality of back plate strap grooves 21, still be equipped with on the back frame plate 1 with the supplementary membrane 49 of location with lathe body matched with.

Both sides of one end of the seat plate 3 far away from the back frame plate 1 are fixedly connected with leg connecting seats 5, one ends of the two leg connecting seats 5 far away from the seat plate 3 are fixedly connected with one-way rotating seats 6, ratchet limiters 11 are arranged above the two one-way rotating seats 6, the one-way rotating seats 6 comprise oblique elastic clamping plates in sliding connection with the leg connecting seats 5, one-way ratchets fixedly connected with the first rotating seats 7 and limiting springs positioned below the oblique elastic clamping plates, the ratchet limiters 11 are positioned above the oblique elastic clamping plates, the one-way rotation can be relieved by pressing the ratchet limiters 11 to reset the one-way rotating seats 6, one ends of the two leg connecting seats 5 far away from the seat plate 3 are rotatably connected with the first rotating seats 7 through the one-way rotating seats 6, one ends of the two first rotating seats 7 far away from the seat plate 3 are both fixedly connected with thigh fixing rods 8, and the thigh fixing rods 8 are telescopic rods with adjustable lengths, the equal fixedly connected with second of one end of first rotation seat 7 is kept away from to two thigh dead levers 8 rotates seat 9, two first rotation seats 7 all are provided with the rotation knob with two second rotation seat 9's outside middle parts, the accessible is twisted and is rotated the rotation knob and adjust the turned angle that first rotation seat 7 and second rotate seat 9, two thigh dead levers 8 all rotate seat 9 through the second and rotate and be connected with shank dead lever 10, two thigh dead levers 8 all are provided with a plurality of shank trough of lacing 22 with the both sides of shank dead lever 10, can carry out the posture adjustment to patient's lower part of the body position and fix, it is fixed to need not patient oneself, patient's travelling comfort has been improved, and the gesture flexibility ratio is higher, it is bigger to adjust the surplus.

The bottom of the seat plate 3 is fixedly connected with a bottom plate 14, both sides of one end of the bottom plate 14 close to the neck pillow 4 are rotatably connected with electric push rods 17, and one ends of the two electric push rods 17 far away from the bottom plate 14 are rotatably connected with the back frame plate 1. A radiotherapy position angle for adjusting patient, improve patient's comfort level, the one end both sides that bottom plate 14 is close to expansion plate 2 all are provided with collateral branch fagging 15, the below middle part of bottom plate 14 and the equal fixedly connected with universal connecting seat 16 in the below middle part of collateral branch fagging 15, the bottom of bottom plate 14 through three universal connecting seat 16 respectively with six flexible arm swing joint of lathe body, through the mode that links with the lathe body, can follow each angle and adjust patient, the accuracy of putting is high, position repeatability is high.

Example two

A pelvic cavity radiotherapy positioning device is shown in figure 4, compared with embodiment 1, the machine tool body further comprises a back frame plate 1, a connecting piece and a rotating support 23, the machine tool body is arranged on the back frame plate 1 and is in sliding connection with the back frame plate 1 through a sliding groove at the bottom of the machine tool body 23, a hydraulic system and a hydraulic arm driven by the hydraulic system are arranged in the back frame plate 1, the machine tool body 23 is driven by the hydraulic arm to slide on the back frame plate 1, the connecting piece is arranged at each of two ends of the back frame plate 1 and comprises a rotating shaft 25 and a connecting sliding sleeve 24 fixedly connected with the rotating shaft 25, the rotating support 23 is a horizontally fixed circular support, each of two ends of the back frame plate 1 is rotatably connected with the connecting piece through the rotating shaft 25, the back frame plate 1 is erected on the rotating support 23 through the connecting sliding sleeve to rotate in the plane of the rotating support 23, the rotating support 23 and the rotating shaft 25 are provided with angle scales along the circumferential direction, back frame plate 1 is equipped with the length scale along its length direction, and lathe body 23 is equipped with side pterygoid lamina 27, and side pterygoid lamina 27 rotates with lathe body 23 to be connected, is equipped with horizontal bandage 26 on back frame plate 1, is equipped with at least three support column in the equidistant below of rotating bracket, and the support column is connected in the rotating bracket bottom surface, and the support column bottom is equipped with hydraulic drive's lift base, connects the sliding sleeve for the cover locate the semicircular sliding sleeve of rotating bracket upper half.

In this embodiment, when a patient lies on the machine tool body 23 flatly, the machine tool body 23 can adjust the position of the patient relative to the back frame plate 1 through the sliding groove and the hydraulic arm, the rotation angle in the horizontal plane of the machine tool body 23 can be adjusted through the adjustment of the connecting sliding sleeve, the radiotherapy radiation field angle suitable for the patient can be adjusted through the combination of the machine tool body and the hydraulic arm, the adjustment is performed through the combination of rotation and movement, so that the locating process is relatively simple and convenient, and the efficiency is higher compared with that in the prior art that only the radiotherapy bed is translated; in addition, the machine tool body 23 can also rotate through the rotating shaft 25, the lateral wing plate 27 can provide support at the moment, so that a patient can be conveniently subjected to radiotherapy from the lateral side, the posture that the patient needs to lie on the side in the lateral radiotherapy in the prior art is avoided, the problem that the radiotherapy position deviates due to vibration easily caused by the fact that the patient lies on the side is avoided, the whole structure is more balanced and stable through the support columns arranged at equal intervals, the support structure is not easily damaged by fatigue, the back frame plate 1 can conveniently slide on the rotating support 23 through the semicircular sliding sleeve, the back frame plate 1 can have the function of being conveniently taken down from the rotating support 23, the clamping grooves enable the machine tool body 23 to be more easily provided with some positioning tools, so that the positioning of the patient on the machine tool body 23 is more accurate, and the rest settings are the same as the operation of the embodiment 1.

EXAMPLE III

Compared with the embodiment 2, the pelvic cavity radiotherapy positioning device has the advantages that the back frame plate 1 is provided with the fixing frame 28, the fixing frame 28 is provided with the chest and abdomen positioning grooves 37, and the fixing frame 28 is further provided with a plurality of pressing mechanisms 30 for pressing the positioning mechanisms 34 on two sides of the chest and abdomen positioning grooves 37 respectively; the positioning mechanism 34 comprises a lower positioning film 39 arranged in the chest and abdomen positioning groove 37 and connected with the fixed frame 28, an upper positioning film 41 arranged above the lower positioning film 39 and connected with the fixed frame 28, and a vacuum pad 40 arranged between the upper positioning film 41 and the lower positioning film 39;

in the embodiment, the lower positioning film 39 and the upper positioning film 41 are immersed in a constant temperature water tank at 60-70 ℃, after being sufficiently softened, the lower positioning film 39 is placed in the chest and abdomen positioning groove 37 and is connected with the fixing frame 28, the vacuum pad 40 can be adhered to the upper surface of the lower positioning film 39, the patient lies on the fixing frame 28 in a supine position, namely, lies on the fixing frame 28, and the patient presses the lower positioning film 39 to enable the lower positioning film 39 to deform to conform to the shape of the back of the patient; a vacuum pad 40 can be adhered to the lower surface of the upper positioning film 41, the radiotherapist covers the upper positioning film 41 on the chest and abdomen of the patient and fixes the upper positioning film 41 on the fixing frame 28, the softened upper positioning film 41 is stretched to enable the upper positioning film 41 to deform to conform to the shape of the chest and abdomen of the patient, and the upper positioning film 41 and the lower positioning film 39 are hardened and then molded; because the patient may slightly move when the positioning film is shaped, the shaping of the positioning film is deviated, a gap may exist between the upper positioning film 41, the lower positioning film 39 and the patient, the radiotherapist sucks the vacuum pad 40 to a certain degree of vacuum negative pressure by using the vacuum pump through observing the gap between the upper positioning film 41 or the lower positioning film 39 and the patient, the plastic particle balls of the vacuum pad 40 are squeezed with each other, the vacuum pad 40 is deformed, and thereby the gap between the patient and the positioning film is filled,

a lower positioning film 39 is arranged in the chest and abdomen positioning groove 37 and used for positioning the back of the patient lying on the back, and the lower positioning film 39 can be firmly attached to the back of the patient, so that the problem that the treatment effect is influenced by the micro motion of the patient due to the gap between the back of the patient and the fixing frame 28 is solved; the positioning surface of the upper positioning film 41 or the lower positioning film 39 can be bonded with a vacuum pad 40, the vacuum pad 40 is formed according to the supine posture of the patient after air exhaust, the gap between the upper positioning film 41 or the lower positioning film 39 and the patient can be filled, the positioning precision is further improved, the positioning of the vacuum pad 40 is less influenced by the subjective factors of a radiotherapy doctor, and the movement of the field center is less.

Two vacuum pads 40 are arranged, wherein one vacuum pad 40 is adhered to the bottom surface of the upper positioning film 41, and the other vacuum pad 40 is adhered to the top surface of the lower positioning film 39; clamping plates 42 used for being connected with the fixing frame 28 are respectively arranged on two sides of the upper positioning film 41 and two sides of the lower positioning film 39, and each clamping plate 42 comprises a top plate 421, a bottom plate 422 and a side plate 423 for connecting the top plate 421421 with the bottom plate 422;

the tightening screw is used for fastening the positioning film on the one hand, and it can make positioning film and joint board 42 fixed firm to screw up the tightening screw, and tightening screw on the other hand can make positioning film and joint board 42 separate, loosens the tightening screw, and the positioning film does not receive roof 421, bottom plate 422 and the pressure of tightening screw to it, and joint board 42 can separate with the positioning film. The positioning film and the clamping plate 42 are of a split structure, when the positioning film is aged, the positioning film can be replaced independently, the clamping plate 42 does not need to be replaced, the positioning mechanism 34 has the characteristic of low replacement cost, in order to enable the positioning film to be placed accurately, namely, the clamping plate 42 is accurately fixed on the fixing frame 28, in one embodiment, a plurality of positioning columns 38 are respectively arranged on the two sides of the chest and abdomen positioning groove 37 on the fixing frame 28, as shown in the figure, positioning holes in one-to-one correspondence with the positioning columns 38 are formed in the side plates 423 of the clamping plate 42, when the clamping plate 42 is positioned with the fixing frame 28, the positioning columns 38 penetrate through the positioning holes, two rows of the positioning columns 38 are arranged, and each row is provided with a plurality of the positioning holes, so that the clamping plate 42 can be accurately positioned on the fixing frame 28. In order to achieve the purpose that the clamping plate 42 is required to be fixed firmly in addition to accurate positioning, as a specific embodiment of the positioning device for breast radiotherapy provided by the present invention, the pressing mechanism 30 includes a fixing plate connected with the fixing frame 28, a fixing rod connected with the fixing plate, a sliding sleeve nested on the fixing rod and capable of sliding up and down along the fixing rod, and a pressing block rotatably connected with the sliding sleeve through an eccentric rotating shaft.

The cross-section of compact heap is semi-circular, and the eccentric pivot of compact heap accessible rotates, and before joint board 42 is connected with mount 28, the radiotherapy doctor stirs the compact heap and makes it rotate to the outside, keeps away from chest belly constant head tank 37, can not form the fixed of butt joint board 42 and interfere. When the clamping plate 42 is placed in the fixing frame 28 and the positioning column 38 is embedded in the positioning hole, the radiotherapy doctor shifts the pressing block again to move the pressing block towards the clamping plate 42, and the bottom surface of the pressing block presses the clamping plate 42 so as to fix the clamping plate 42 and limit the clamping plate to move upwards. The pressing mechanism 30 in this embodiment has a simple structure, is convenient to operate, and is firmly fixed to the snap plate 42;

different positioning films can be connected with the clamping plates 42 with different thicknesses, in order to enable the pressing mechanism 30 to adapt to the clamping plates 42 with different thicknesses, the pressing mechanism 30 is required to move up and down, in order to achieve the purpose, on the basis of the embodiment, a plurality of annular grooves are arranged in the sliding sleeve at intervals along the sliding direction of the sliding sleeve, annular convex blocks protruding outwards are arranged at the top end of the fixed rod and are clamped with one of the annular grooves, the annular convex blocks can be made of elastic materials, the annular convex blocks are extruded and deformed when the sliding sleeve moves, the movement of the sliding sleeve is not influenced, the annular convex blocks are clamped in the annular grooves when the sliding sleeve does not move, and the annular convex blocks play a limiting role;

when the patient is carrying out the radiation therapy of chest belly, the radiotherapy district will be kept away from to patient's arm, and under the general condition, patient's arm will lift up and place in the both sides of head to require the arm can not move during the treatment, in order to avoid the arm to move and get into the radiotherapy district and cause unnecessary injury, or the arm removes and drives the trunk and remove and influence the radiotherapy effect. In order to enable the arms of a patient to be in a comfortable state, two handheld holding rods 32 are arranged on the top surface of the fixing frame 28 above the chest and abdomen positioning groove 37, and when in treatment, the hands of the patient hold the handheld holding rods 32, namely the handheld holding rods 32 can limit the positions of the arms, so that the discomfort of lifting the arms for a long time is relieved;

because the height and the arm length of each patient are different, in order to enable the arm and the handle holding rod 32 of the patient to be in the most comfortable lifting state, the handle holding rod 32 needs to be movable along the length direction of the fixing frame 28, and for achieving the purpose, on the basis of the embodiment, two strip-shaped grooves 31 are arranged on the top surface of the fixing frame 28 above the chest and abdomen positioning grooves 37; a conveying mechanism 33 is arranged in each strip-shaped groove 31, and the handheld holding rod 32 is arranged on the conveying mechanism 33 and driven by the conveying mechanism 33 to move. Specifically, the transmission mechanism 33 includes two transmission shafts 44 disposed at intervals, and a conveyor belt sleeved on the two transmission shafts 44, the transmission shafts 44 are disposed in the elongated grooves 31 through the fixing blocks 43, and the holding rod 32 is disposed on the movable conveyor belt, as shown in the figure. The handheld holding rod 32 is held by the patient's hand, and through promoting or pulling back handheld holding rod 32, handheld holding rod 32 atress is portable, because handheld holding rod 32 sets up on the conveyer belt, the conveyer belt cover is established in the pivot, can realize handheld holding rod 32 steady movement.

In order to avoid the situation that the patient frequently pushes the handheld grip 32 to move during the radiotherapy process, and the movement of the conveyor belt is required to be limited, on the basis of the above embodiment, the handheld grip 32 includes a fixing sleeve 46 with a bottom surface arranged on the conveyor belt, a pressure rod 45 with a lower portion embedded in the fixing sleeve 46, a spring 47 with one end fixedly connected to the bottom surface of the pressure rod 45, and a pressing block 48 connected to the other end of the spring 47, as shown in the figure, the outer wall of the pressure rod 45 is in frictional contact with the inner wall of the fixing sleeve 46, and friction force exists between the pressure rod 45 and the fixing sleeve 46, the friction force can overcome the gravity of the pressure rod 45, the spring 47 and the pressing block 48, so that the pressure rod 45, the spring 47 and the pressing block 48 do not move downward by themselves, the spring 47 is a hard spring 47, the pulling force of the spring 47 on the pressing block 48 is greater than the gravity of the pressing block 48, and the spring 47 can rebound by itself after being subjected to a strong pressure. The compression bar 45 and the fixing sleeve 46 are light in weight, the fixing sleeve 46 is hollow, excessive pressure cannot be caused on the conveying belt, the pressing block 48 is in contact with the conveying belt, the contact area is large, and the pressing block 48 can apply downward pressure on the conveying belt to enable the conveying belt to deform and cannot move;

the patient holds the handheld holding rod 32, can adjust the position of handheld holding rod 32 by oneself, after accomplishing the regulation, can be pressed down depression bar 45 by the radiotherapy doctor, depression bar 45 presses spring 47 and briquetting 48 downstream, and after briquetting 48 contacted with the conveyer belt, briquetting 48 exerted down pressure to the conveyer belt to it is spacing to the conveyer belt, the position that contacts with briquetting 48 of conveyer belt moves down, makes it can not the horizontal migration, and then just can not drive handheld holding rod 32 and remove. When the position of the handheld holding rod 32 needs to be adjusted again, a radiotherapy doctor can press the pressing rod 45 again, the pressing rod 45 applies pressure to the spring 47, the spring 47 can rebound after being pressed, the rebound force can overcome the friction force between the pressing rod 45 and the sleeve, the pressing block 48 and the pressing rod 45 move upwards, the pressing block 48 is far away from the conveyor belt, and the limitation on the conveyor belt is removed;

in order to avoid the movement of the legs of the patient during treatment, as a specific embodiment of the positioning device for thoracic radiotherapy provided by the present invention, the head positioning groove 29 and the leg positioning groove 35 are provided on the fixing frame 28, and the binding bands 36 are provided on the fixing frame 28 at both sides of the leg positioning groove 35, during treatment, the head of the patient is located in the head positioning groove 29, the legs are located in the leg positioning groove 35, the binding bands 36 are bound to the legs to limit the movement, and the rest of the arrangement and operation are the same as those of the embodiment.

Example four

Compared with the embodiment, the pelvic cavity radiotherapy positioning device comprises a fixing frame 50 and a latticed membrane body 51, wherein the outer edge of the membrane body 51 is connected with the fixing frame 50, the fixing frame 50 comprises a film pressing base plate 56 and a film pressing plate 55, a plurality of studs 54 distributed along the length direction of the film pressing base plate 56 are arranged on the upper end surface of the film pressing base plate 56, the upper ends of the studs 54 movably penetrate through the film pressing plate 55 and extend out of the film pressing plate 55, a hand nut 52 is in threaded connection with the studs, a pair of convex edges 53 capable of abutting against fingers to rotate the hand nut 52 are arranged on the outer side wall of the hand nut 52, first rubber strips 57 are embedded on the film pressing base plate 56 on the inner sides of the studs 54, first embedding grooves 61 capable of being embedded by the first rubber strips 57 are arranged on the film pressing base plate 56, second rubber strips 58 corresponding to the first rubber strips 57 are embedded on the lower end surface of the film pressing plate 55, a second embedding groove 62 for embedding the second rubber strip 58 is formed in the lower end face of the film pressing plate 55, and the first rubber strip 57 and the second rubber strip 58 are respectively pressed on the lower end face and the upper end face of the film body 51; a first arc-shaped guide surface which can be matched with the first rubber strip 57 for guiding so as to facilitate the first rubber strip 57 to be embedded into the first caulking groove 61 is arranged on the inner side wall of the opening end of the first caulking groove 61; through the arrangement of the first arc-shaped guide surface, the first rubber strip can be more conveniently embedded into the first embedding groove when being assembled; a second arc-shaped guide surface which can be matched with the second rubber strip 58 for guiding so as to facilitate the second rubber strip 58 to be embedded into the second caulking groove 62 is arranged on the inner side wall of the opening end of the second caulking groove 62; through the arrangement of the second arc-shaped guide surface, the second rubber strip can be more conveniently embedded into the second embedding groove when being assembled; the upper end surface of the first rubber strip 57 is provided with a plurality of first anti-skid convex ribs 59 distributed from inside to outside; the friction force between the first rubber strip and the membrane body can be increased through the arrangement of the first anti-skidding convex ribs, and the membrane body can be better pressed by the first rubber strip; the vertical section of the first anti-skid convex rib 59 is of a sawtooth structure; by adopting the structure, the friction force between the first rubber strip and the membrane body can be further increased, and the membrane body can be better pressed by the first rubber strip; a plurality of second anti-skid convex ribs 41 distributed from inside to outside are arranged on the lower end surface of the second rubber strip 58; the friction force between the second rubber strip and the membrane body can be increased through the arrangement of the second anti-skidding convex ribs, and the membrane body can be better compressed by the second rubber strip; the vertical section of the second anti-skid convex rib 60 is of a sawtooth structure; by adopting the structure, the friction force between the second rubber strip 58 and the membrane body can be further increased, the second rubber strip 58 can better compress the membrane body, the membrane body in the membrane body is compressed by the first rubber strip 57 and the second rubber strip 58 in the fixing frame, namely, the fixing frame 50 is detachably connected with the membrane body 51, so that after the membrane body 51 is aged, the membrane body 51 can be replaced without replacing the fixing frame 50, and the membrane body has the advantage of low replacement cost. The rest of the setup and operation are the same as those of the example.

Example four

A method for positioning a pelvic cavity and an abdominal cavity in radiotherapy,

s1, lowering the whole back frame plate to the lowest position by using a machine tool body, enabling a patient to lie on the back frame plate after the back frame plate is laid flat by an electric push rod, and then laying a positioning auxiliary film on the abdominal cavity of the patient;

s2, firstly adjusting the lengths of the telescopic plate and the thigh fixing rod according to the height of a patient, fixing the trunk and the legs of the patient by a bridle, and then adjusting the supine position and the leg position according to the position needing chemotherapy;

s3, the machine tool body adjusts the posture changing process during primary radiotherapy, adjusts the deviation position during previewing, and records pressure data under each posture through a pressure detection plate and a plurality of pressure detection strips;

s4, after the rehearsal is finished, resetting the body frame plate, starting a radiotherapy program, and adjusting and transforming the posture according to the rehearsal deviation position and data; s5, after radiotherapy is finished, lowering the body frame plate to the lowest position through the machine tool body, and after the bridle is opened to release the patient, resetting the back frame plate and the thigh fixing rod;

s6, when the fixing frame and the positioning auxiliary membrane are combined, the back splint is lowered to the lowest position by using the machine tool body, then the patient lies down on the fixing frame, the head is fixed through the head fixing groove and the neck pillow, and then the positioning auxiliary membrane is covered on the abdominal cavity of the patient and is fixed with the fixing frame;

s7, the patient is tightly fixed on the back frame plate through the side wing plates, the transverse binding bands, the leg positioning grooves and the binding bands, and then the inclination angle of the body of the patient is adjusted through the rotary fixing frame under the action of the rotary support, so that the radiotherapy positions can be conveniently determined at different positions.

It should be noted that, for those skilled in the art, many changes and modifications can be made without departing from the spirit and scope of the invention, and the invention is not to be considered limited to the embodiments illustrated in the drawings.

Claims (10)

1. The utility model provides a pelvic cavity radiotherapy positioner, includes lathe body, back frame plate and expansion plate, its characterized in that: the one end sliding connection of back frame plate has the expansion plate, the one end that the expansion plate kept away from the back frame plate rotates and is connected with the seat, the one end that the expansion plate was kept away from to the top of back frame plate is equipped with the neck pillow, the equal fixedly connected with telescopic link in one end both sides that the seat below is close to the back frame plate, the one end fixedly connected with driver that the neck pillow is close to in back frame plate below middle part, the output fixedly connected with driving screw of driver, the top middle part of seat is equipped with the pressure detection board, the one end equidistance that the top of back frame plate is close to the neck pillow is equipped with a plurality of pressure detection strips, the impartial distance in top both sides of back frame plate is equipped with a plurality of back plate strap grooves, still be equipped with on the back frame plate with the supplementary membrane in location with lathe body matched with.

2. The pelvic cavity radiotherapy positioning device of claim 1, wherein: both sides of one end, far away from the back frame plate, of the seat plate are fixedly connected with leg connecting seats, one ends, far away from the seat plate, of the two leg connecting seats are fixedly connected with one-way rotating seats, ratchet wheel limiters are arranged above the two one-way rotating seats, one ends, far away from the seat plate, of the two leg connecting seats are rotatably connected with first rotating seats through the one-way rotating seats, thigh fixing rods are fixedly connected with one ends, far away from the seat plate, of the two first rotating seats, second rotating seats are fixedly connected with one ends, far away from the first rotating seats, of the two thigh fixing rods, the two thigh fixing rods are rotatably connected with shank fixing rods through the second rotating seats, and a plurality of leg strap grooves are formed in both sides of the two thigh fixing rods and the shank fixing rods; seat bottom fixedly connected with bottom plate, the one end both sides that the bottom plate is close to the neck pillow all rotate and are connected with electric putter, and the one end both sides that the bottom plate is close to the expansion plate all are equipped with the collateral branch fagging, the equal fixedly connected with universal connecting seat in the below middle part of bottom plate and collateral branch fagging.

3. The pelvic cavity radiotherapy positioning device of claim 2, wherein: the bottom of bottom plate respectively with six telescopic arm swing joint of lathe body through three universal connecting seat, the one end that the bottom plate was kept away from to two electric putter all rotates with the back frame plate to be connected, the junction of expansion plate and seat is equipped with angle sensor, two first rotation seats all are equipped with the rotation knob with the outside middle part of two second rotation seats, the thigh dead lever is adjustable length's telescopic link, inside including with shank connecting seat sliding connection's slant elasticity cardboard, with first rotation seat fixed connection's one-way ratchet and be located the spacing spring of slant elasticity cardboard below.

4. The pelvic cavity radiotherapy positioning device of claim 3, wherein: the machine tool body also comprises a back frame plate, a connecting piece and a rotating support, the machine tool body is arranged on the back frame plate and is in sliding connection with the back frame plate through a sliding groove at the bottom of the machine tool body, a hydraulic system and a hydraulic arm driven by the hydraulic system are arranged in the back frame plate, the machine tool body is driven by the hydraulic arm to slide on the back frame plate, the connecting piece is arranged at each of two ends of the back frame plate and comprises a rotating shaft and a connecting sliding sleeve fixedly connected with the rotating shaft, the rotating support is a horizontally fixed circular support, two ends of the back frame plate are rotatably connected with the connecting piece through the rotating shaft, the back frame plate is erected on the rotating support through the connecting sliding sleeve and rotates in the plane of the rotating support, the rotating support and the rotating shaft are provided with angle scales along the circumferential direction, the back frame plate is provided with length scales along the length direction, the machine tool body is provided with a side wing plate, and the side wing plate is rotatably connected with the machine tool body, the back frame plate is provided with a transverse binding belt.

5. The pelvic cavity radiotherapy positioning device of claim 4, wherein: at least three support columns are arranged below the rotating support at equal intervals, the support columns are connected to the bottom surface of the rotating support, a hydraulic driving lifting base is arranged at the bottom of each support column, and the connecting sliding sleeve is a semicircular sliding sleeve sleeved on the upper half part of the rotating support.

6. The pelvic cavity radiotherapy positioning device of claim 5, wherein: the back frame plate is provided with a fixing frame, the fixing frame is provided with a chest and abdomen positioning groove, and a plurality of pressing mechanisms for pressing the positioning mechanisms are respectively arranged on the fixing frame and on two sides of the chest and abdomen positioning groove; the positioning mechanism comprises a lower positioning film, an upper positioning film and a vacuum pad, wherein the lower positioning film is arranged in the chest and abdomen positioning groove and is connected with the fixing frame; the vacuum pads are two, wherein one vacuum pad is adhered to the bottom surface of the upper positioning film, and the other vacuum pad is adhered to the top surface of the lower positioning film.

7. The pelvic cavity radiotherapy positioning device of claim 6, wherein: clamping plates used for being connected with the fixing frame are respectively arranged on two sides of the upper positioning film and two sides of the lower positioning film, and each clamping plate comprises a top plate, a bottom plate and a side plate for connecting the top plate and the bottom plate; the top plate and the bottom plate are respectively provided with a tightening screw, the nut end of the tightening screw is positioned in the top plate or the bottom plate, the screw end of the tightening screw penetrates through the top plate or the bottom plate, and the fixing frame is respectively provided with a plurality of positioning columns at two sides of the chest and abdomen positioning groove; the clamping plate is provided with positioning holes which correspond to the positioning columns one by one, the pressing mechanism comprises a fixed plate connected with the fixed frame, a fixed rod connected with the fixed plate, a sliding sleeve which is nested on the fixed rod and can slide up and down along the fixed rod, and a pressing block which is rotatably connected with the sliding sleeve through an eccentric rotating shaft, and a plurality of annular grooves are formed in the sliding sleeve at intervals along the sliding direction; the top end of the fixed rod is provided with an annular convex block which protrudes outwards; the annular convex block is clamped with one of the annular grooves, and the fixing frame is provided with a head positioning groove and a leg positioning groove; the fixing frame is provided with binding bands at two sides of the leg positioning groove, and the top surface of the fixing frame is provided with two strip-shaped grooves above the chest and abdomen positioning grooves; a conveying mechanism is arranged in each strip-shaped groove; the conveying mechanism comprises two transmission shafts arranged at intervals and a conveying belt sleeved on the two transmission shafts; the conveyor belt is provided with a handheld holding rod; the transmission shaft is arranged in the elongated groove through the fixing block, and the handheld holding rod comprises a fixing sleeve arranged on the conveyor belt, a pressure rod with the lower part embedded in the fixing sleeve, a spring with one end fixedly connected to the bottom surface of the pressure rod, and a pressing block connected with the other end of the spring.

8. The pelvic cavity radiotherapy positioning device of claim 7, wherein: still be equipped with on the frame plate of back and fix a position supplementary membrane with lathe body matched with, including fixed frame and latticed diaphragm body, the outward flange and the fixed frame of diaphragm body are connected, fixed frame includes bottom plate and clamp plate, be equipped with a plurality of double-screw bolts that distribute along bottom plate length direction on the up end of bottom plate, stretch out outside the clamp plate and threaded connection has the hand to twist the nut after the activity of double-screw bolt upper end runs through the clamp plate, be equipped with a pair of chimb that can offset with the finger in order to rotate the hand and twist the nut on the lateral wall of hand twist the nut, it is equipped with first rubber strip to inlay on the inboard bottom plate of double-screw bolt, be equipped with the first caulking groove that can supply first rubber strip embedding on the bottom plate, it is equipped with the second rubber strip that corresponds the setting with first rubber strip to inlay on the lower terminal surface of clamp plate, first rubber strip and second rubber strip compress tightly respectively on the lower terminal surface and the up end of diaphragm body.

9. The pelvic cavity radiotherapy positioning device of claim 8, wherein: a first arc-shaped guide surface which can be matched with the first rubber strip for guiding so as to facilitate the first rubber strip to be embedded into the first caulking groove is arranged on the inner side wall of the opening end of the first caulking groove; a second arc-shaped guide surface which can be matched with the second rubber strip for guiding so as to facilitate the second rubber strip to be embedded into the second caulking groove is arranged on the inner side wall of the opening end of the second caulking groove; at least one first anti-skid convex rib is arranged on the upper end face of the first rubber strip from inside to outside, and the vertical section of the first anti-skid convex rib is of a sawtooth structure; the lower end face of the second rubber strip is provided with a plurality of second anti-skid protrusions distributed from inside to outside, and the vertical cross section of each second anti-skid convex rib is of a sawtooth structure.

10. The pelvic cavity radiotherapy positioning method according to any one of the above items, characterized in that:

s1, lowering the whole back frame plate to the lowest position by using a machine tool body, enabling a patient to lie on the back frame plate after the back frame plate is laid flat by an electric push rod, and then laying a positioning auxiliary film on the abdominal cavity of the patient;

s2, firstly adjusting the lengths of the telescopic plate and the thigh fixing rod according to the height of a patient, fixing the trunk and the legs of the patient by a bridle, and then adjusting the supine position and the leg position according to the position needing chemotherapy;

s3, the machine tool body adjusts the posture changing process during primary radiotherapy, adjusts the deviation position during previewing, and records pressure data under each posture through a pressure detection plate and a plurality of pressure detection strips;

s4, after the rehearsal is finished, resetting the body frame plate, starting a radiotherapy program, and adjusting and transforming the posture according to the rehearsal deviation position and data; s5, after radiotherapy is finished, lowering the body frame plate to the lowest position through the machine tool body, and after the bridle is opened to release the patient, resetting the back frame plate and the thigh fixing rod;

s6, when the fixing frame and the positioning auxiliary membrane are combined, the back splint is lowered to the lowest position by using the machine tool body, then the patient lies down on the fixing frame, the head is fixed through the head fixing groove and the neck pillow, and then the positioning auxiliary membrane is covered on the abdominal cavity of the patient and is fixed with the fixing frame;

s7, the patient is tightly fixed on the back frame plate through the side wing plates, the transverse binding bands, the leg positioning grooves and the binding bands, and then the inclination angle of the body of the patient is adjusted through the rotary fixing frame under the action of the rotary support, so that the radiotherapy positions can be conveniently determined at different positions.

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