CN114053603B

CN114053603B - Radiotherapy position mount

Info

Publication number: CN114053603B
Application number: CN202111448196.7A
Authority: CN
Inventors: 贾飞
Original assignee: Individual
Current assignee: Jia Fei
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-05-13
Anticipated expiration: 2041-11-30
Also published as: CN114053603A

Abstract

The invention belongs to the technical field of radiotherapy, and particularly relates to a radiotherapy body position fixing frame which comprises a positioning frame, a net diaphragm plate, a resetting unit and an attitude controller; when radiotherapy positioning is carried out each time, the human body needs to be moved and rotated repeatedly to meet the position precision required by radiotherapy, so that the positioning time is long, the time for a radiotherapy person to keep a fixed posture is prolonged, and the comfort experience of the radiotherapy person is reduced; therefore, the invention realizes that after the posture of the human body is changed, the posture change quantity generated by the radiotherapy part and the head of the radiotherapy equipment is reduced as much as possible when the position of a radiotherapy person is adjusted, the posture change quantity of the radiotherapy part of the human body and the head of the radiotherapy equipment is controlled within the range required by the radiotherapy process, and the comfortable experience of the human body in the radiotherapy process is improved while the radiotherapy is stably carried out.

Description

Radiotherapy position mount

Technical Field

The invention belongs to the technical field of radiotherapy, and particularly relates to a radiotherapy body position fixing frame.

Background

Radiotherapy is a method for treating tumors by killing cancer cells by using ionizing radiation of high-energy rays, the whole radiotherapy process is irreversible, the total radiation amount received by each human body part is limited, the body of a patient needs to be fixed as necessary to accurately irradiate a tumor focus area by using rays, and according to the requirement of the radiotherapy body position, on one hand, the patient needs to obtain the correct treatment body position by using a body position auxiliary device, and on the other hand, the body position is required to be kept unchanged in the treatment process, or the body position can be repeated by each positioning, so that the body position of the patient is prevented from being changed due to subconscious movement in the treatment process.

For the discussion of the radiotherapy position, reference can be made to: zhengzuan et al, "discussion of the concept of posture immobilization for radiotherapy", which states: the body and the head of the human body are greatly different in structure, unlike the skull which has a better rigid structure, the skin of the body and the tissues and organs in the body have relative motion during radiotherapy positioning, and the phenomenon that articles are contained in a pocket and the articles have relative motion during movement is called as 'capsular effect'; the body of the human body is similar to a cylinder, and when the human body is put in place for radiotherapy, the internal organs can be driven to move along with the rotation of the human body, so the phenomenon is called as a cylinder effect; in the use process, the operation is complex due to the 'bag effect' and the 'cylinder effect' of the human body in the positioning process, the used fixing materials are required to be waited for setting after corresponding time, the accuracy and the repeatability like head positioning are difficult to achieve, and therefore a certain fixing device is required to be assisted in the treatment process of a patient.

Fixing the patient by adopting different fixing methods and different auxiliary materials according to different parts irradiated by radiotherapy; the fixed material comprises a cushion (vacuum cushion) made of special material and laid under the body of the patient, a fixed film (body film) covered on the body surface and the like; the general principle is that the body position fixing repeatability is required to be good (because multiple times of irradiation are required), the comfort of the patient is good (the fixing time can be ensured to be relatively long); when the position is set each time, the human body needs to be moved and rotated repeatedly to meet the position precision required by radiotherapy, so that the position setting time is longer, the time for keeping the fixed posture of a radiotherapy person is prolonged, and the comfort experience of the radiotherapy person is reduced.

Therefore, in order to solve the problem of influencing the comfort of the radiotherapy process, the invention provides a radiotherapy body position fixing frame.

Disclosure of Invention

In order to solve the defects of the prior art, the invention provides a radiotherapy body position fixing frame; through the automatically controlled translation platform and the automatically controlled revolving frame that set up, automatically controlled translation platform fixed mounting is on the base of radiotherapy equipment treatment bed, and automatically controlled revolving frame is fixed between locating rack and radiotherapy equipment treatment bed, makes the radiotherapy position of radiotherapy person's health keep at the radiotherapy target area of radiotherapy equipment aircraft nose, reduces the required time of radiotherapy pendulum position flow to the travelling comfort of radiotherapy pendulum position process has been promoted.

The invention discloses a radiotherapy body position fixing frame, which comprises:

the positioning frame is used for fixing the body position of a radiotherapist;

the net membrane plate is detachably arranged on the positioning frame through bolts and is used for supporting a radiotherapy person;

the resetting unit is arranged on the positioning frame and used for adjusting the position and the posture of the positioning frame, the resetting unit comprises an electric control translation table used for moving the treatment bed and an electric control revolving frame used for rotating the positioning frame, the electric control translation table is fixedly arranged on a base of the treatment bed, and the electric control revolving frame is fixedly arranged on the base below the treatment bed;

the heating unit is used for heating the omentum plate to a softening state;

a controller for controlling operation of the reset unit.

Preferably, the two sides of the positioning frame are provided with supporting tables in a sliding mode, one side, facing the inside of the positioning frame, of each supporting table is fixedly provided with a raised table cushion, and each table cushion is located below the corresponding net membrane plate.

Preferably, the supporting platform is provided with a buckling cavity, the buckling cavity penetrates through the supporting platform to expose the surface of the positioning frame, a butting buckle for locking is installed in the buckling cavity, and the positioning frame is provided with a mark on the moving track of the supporting platform.

Preferably, a pair of retaining rings is arranged on the circumference of the buckle, the retaining rings are slidably mounted in the moving direction of the buckle cavity parallel to the supporting platform, the retaining rings are in threaded connection with the buckle, and a spring fixedly connected with the buckle cavity is mounted between the retaining rings.

Preferably, the heating unit further comprises a heating wire, and the heating wire is installed on the net membrane plate.

Preferably, a loop of the heating wire in the net membrane plate is electrically connected with a switch element, and in an initial state, the switch element is in a closed state and is disconnected when the net membrane plate is deformed by force.

Preferably, the locating rack and the reset unit are of a frame structure, a support bed capable of lifting is arranged below the net membrane plate, the support bed is installed in the reset unit, and the lifting limit of the support bed is level to the net membrane plate.

Preferably, a plurality of supporting cushions are slidably mounted on the top surface of the supporting bed in the longitudinal axis direction, the supporting cushions respectively correspond to different areas of the net membrane plate, the supporting cushions are different in protruding height and respectively correspond to the head, the waist and the legs of a human body, and the supporting bed is lowered to enable the supporting cushions to contact with the supporting net membrane plate;

preferably, the table cushion or the support cushion is of an air bag structure, each table cushion or the support cushion is respectively provided with a rubber tube communicated with an air source, and different air pressure values are set in the air sources communicated with the table cushion or the support cushion;

preferably, a valve is arranged on the rubber tube, a port of the valve faces the net membrane plate, and a pipeline of the rubber tube is fixed on the surface, facing the outer side, of the positioning frame through the valve.

The invention has the following beneficial effects:

1. according to the radiotherapy body position fixing frame, the parameter change of the positioning frame is monitored through the angular velocity sensor in the controller, the parameter change monitored through the angular velocity sensor is processed through the controller, the operation parameters of the reset unit are controlled, the positioning frame enables the human body posture of a radiotherapy person on the positioning frame to be restored to the positioning and fixing state under the action of the reset unit, the radiotherapy position of the body of the radiotherapy person is kept at the radiotherapy target area of the head of radiotherapy equipment through the electric control translation table and the electric control revolving frame arranged in the reset unit, the time required by the radiotherapy positioning process is reduced, and therefore the comfort of the radiotherapy positioning process is improved.

2. According to the radiotherapy body position fixing frame, the table cushion and the supporting cushion are arranged into the airbag type structure, and the table cushion and the supporting cushion which support different parts of a body provide differentiated support by matching with the preset air pressure value of each table cushion and each supporting cushion, so that a lying radiotherapy person can feel different soft and hard feelings of the table cushion and the supporting cushion, and the lying radiotherapy body position fixing frame is suitable for the experience state that the body is in a relaxing and comfortable state.

Drawings

The invention is further described below with reference to the accompanying drawings;

FIG. 1 is a perspective view of a position fixing frame for radiotherapy in the present invention;

FIG. 2 is an exploded view of the position fixing frame for radiotherapy in the present invention;

FIG. 3 is a perspective view of a pallet assembly of the present invention.

In the figure: 1. a positioning frame; 2. a web plate; 21. a switching element; 3. an electrically controlled translation stage; 4. an electrically controlled turret; 5. a saddle; 50. a table cushion; 51. buckling a cavity; 511. buckling; 512. a retaining ring; 52. a spring; 6. supporting a bed; 61. supporting a cushion; 62. a hose; 63. a valve; 7. a treatment couch; 71. a base.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 3, the radiotherapy body position fixing frame of the present invention comprises:

the positioning frame 1 is used for fixing the body position of a radiotherapy person;

the net membrane plate 2 is detachably arranged on the positioning frame 1 through bolts, and the net membrane plate 2 is used for supporting a radiotherapy person;

the resetting unit is arranged on a treatment bed 7 of radiotherapy equipment and used for adjusting the position and the posture of the positioning frame 1, the resetting unit comprises an electric control translation table 3 used for moving the treatment bed 7 and an electric control revolving frame 4 used for rotating the positioning frame 1, the electric control translation table 3 is fixedly arranged on a base 71, and the electric control revolving frame 4 is fixedly arranged on the treatment bed 7;

a heating unit for heating the web plate 2 to a softened state;

a controller for controlling the operation of the reset unit;

when radiotherapy positioning is carried out each time, the human body needs to be moved and rotated repeatedly to meet the position precision required by radiotherapy, so that the positioning time is long, the time for a radiotherapy person to keep a fixed posture is prolonged, and the comfort experience of the radiotherapy person is reduced;

when radiotherapy positioning is carried out, firstly, the positioning frame 1 is installed on a reset unit of a radiotherapy equipment treatment bed 7, wherein the reset unit is positioned in the central shaft area of the radiotherapy equipment treatment bed 7, meanwhile, a net membrane plate 2 made of high-molecular polyester low-temperature thermoplastic material is placed into a heating unit, the heating unit can adopt a flat heater, the flat heater is operated to preheat the net membrane plate 2 to 60-70 ℃ and keep for 5-10 minutes to soften the net membrane plate, then the softened net membrane plate is flatly paved and fixed on the positioning frame 1, the temperature is suitable for the acceptance degree of a patient, a spandex yarn sleeve liner can be worn on the body surface selectively to protect the skin or a wound, the operable time at normal temperature is 3-5 minutes, the angle is adjusted, the shape is uniformly formed to be cooled and shaped, a lying radiotherapy person and the positioning frame 1 are kept to be relatively static, and then a radiotherapy process is carried out;

the invention fixes the body position of a radiotherapist through the mesh membrane plate 2 arranged on the positioning frame 1, monitors the position and posture change of the positioning frame 1 through the angular velocity sensor after the posture position of the human body of the radiotherapist is changed when the radiotherapist lies and swings, processes the parameter change monitored by the angular velocity sensor through the controller, controls the operation parameter of the reset unit, through the arranged electric control translation table 3 and the electric control revolving frame 4, the electric control translation table 3 is fixedly arranged on the base 71 of the radiotherapist equipment treatment bed 7, the electric control revolving frame 4 is fixed between the positioning frame 1 and the radiotherapist equipment treatment bed 7, the movement of the electric control translation table 3 on the base 71 drives the treatment bed 7 to move, the rotation of the electric control revolving frame 4 on the treatment bed 7 drives the positioning frame 1 to rotate, and then under the matching of the electric control translation table 3 and the electric control revolving frame 4, the body position of the radiotherapist is kept at the target area of the radiotherapist equipment handpiece, the time required by the radiotherapy positioning process is reduced, so that the comfort of the radiotherapy positioning process is improved;

in the duration of radiotherapy, when a human body keeps a fixed posture for a long time, muscles of corresponding parts are in a tense state for a long time, lactic acid is released and is difficult to metabolize, muscle soreness is caused, the human body can generate subconscious actions, the body comfort and the positioning precision of a radiotherapy person are affected, and the body comfort in the radiotherapy process can be seriously reduced by increasing the clamping force on the human body through the body position fixing frame; when the travelling comfort that the radiotherapy person need adjust the health posture for lying, the controller operation, drive the removal of radiotherapy equipment treatment bed 7 through automatically controlled translation platform 3, and drive the rotation of locating rack 1 through automatically controlled revolving rack 4, realize after the change of human gesture, reduce the produced gesture change volume of radiotherapy position and radiotherapy equipment aircraft nose as far as possible when making the radiotherapy person adjust the position, the gesture change volume control that keeps human radiotherapy position and radiotherapy equipment aircraft nose is in the scope that the radiotherapy flow required, improve the comfortable nature experience of radiotherapy in-process human when guaranteeing that the radiotherapy is stable goes on.

As an embodiment of the present invention, two sides of the positioning frame 1 are slidably mounted with a pallet 5, one side of the pallet 5 facing the inside of the positioning frame 1 is fixed with a convex table pad 50, the table pad 50 is located below the reticular lamina 2, and the pallet 5 slides to approach the body of the radiotherapy person; through the saddle 5 that sets up, make its axis of ordinates both sides along locating rack 1 remove, when carrying out the radiotherapy pendulum position, operation saddle 5 removes to radiotherapy person's health both sides, utilize the pad 50 on saddle 5 protruding to support nearly contact net lamina membranacea 2 and support tight radiotherapy person's health position in the inner wall of locating rack 1, increase the limiting effect to radiotherapy person's position, and saddle 5 is located the below of net lamina membranacea 2, still played the bearing effect to net lamina membranacea 2, reduce the possibility that net lamina membranacea 2 produced excessive deformation in the position of radiotherapy person's size profile, ensure the fixed effect of net lamina membranacea 2 to radiotherapy person's position.

As an embodiment of the present invention, a fastening cavity 51 is arranged on the supporting table 5, the fastening cavity 51 penetrates through the supporting table 5 to expose the surface of the positioning frame 1, a supporting buckle 511 for locking is installed in the fastening cavity 51, and the positioning frame 1 is provided with a mark on a moving track of the supporting table 5;

a pair of retaining rings 512 are arranged on the circumference of the retaining buckle 511, the retaining rings 512 are slidably mounted in the buckle cavity 51 in a direction parallel to the moving direction of the saddle 5, the retaining rings 512 are in threaded connection with the retaining buckle 511, and a spring 52 fixedly connected with the retaining rings 512 is mounted between the retaining rings 512 and the buckle cavity 51;

the buckle cavity 51 arranged on the support table 5 is used for installing the buckle ring 512, and the buckle ring 512 is in threaded connection with the abutting buckle 511, so that the abutting buckle 511 is in a rotary locking state, the bottom end of the abutting buckle 511 abuts against and contacts the positioning frame 1 along the buckle cavity 51, after the placement of a radiotherapy person is completed and the support table 5 moves to a corresponding position, the support table 5 is locked through the rotary abutting buckle 511, the posture of the radiotherapy person relative to the positioning frame 1 is limited, when the radiotherapy person places in a subsequent radiotherapy process, the support table 5 is matched with the tightly screwed and adjusted abutting buckle 511 through the mark arranged on the positioning frame 1, so that the support table 5 can quickly position the position of the radiotherapy person needing to be limited, and can perform high-strength limitation on the position needing to be subjected to radiotherapy; when the radiotherapy person keeps the fixed posture for a long time and leads to muscle soreness, make the activity that the radiotherapy person produced influence the position precision of position that needs the radiotherapy, and then through buckle 512 and detain the spring 52 of installing between chamber 51, combine radiotherapy position and adjacent incomplete spacing position in the person's of radiotherapy position, slow down the speed of receiving the incomplete spacing position of radiotherapy person's body when changing the position, and then reduce the position influence to the radiotherapy position in the body, and utilize the elastic potential energy of spring 52 to make saddle 5 resume to the initial position when detaining 511 is fixed, when satisfying the radiotherapy person's body position and moving about, it needs the radiotherapy position to be in the required position precision range of radiotherapy to have kept the radiotherapy person, thereby reduced the influence to radiotherapy position precision when satisfying the position mount travelling comfort of radiotherapy.

As an embodiment of the present invention, the heating unit further includes a heating wire installed on the mesh membrane plate 2;

a loop of the heating wire in the net membrane plate 2 is electrically connected with a switch element 21, the switch element 21 is in a closed state in an initial state, and the switch element 21 is disconnected when the net membrane plate 2 is stressed and deformed;

when carrying out the first pendulum position to the radiotherapy person, start the heating wire and make netlike lamina membranacea 2 heat up to softening temperature, and can be through the operation that keeps the heating wire, delay the cooling of netlike lamina membranacea 2 under the room temperature condition, satisfy the condition that the pendulum position in-process needs longer time, the heating wire can adopt the heating wire to wrap up in netlike lamina membranacea 2 surface or cladding inside netlike lamina membranacea 2, through setting up the switch element 21 on the heating wire return circuit, switch element 21 can adopt travel switch, when the radiotherapy person is lying netlike lamina membranacea 2, the 2 deformation adaptation radiotherapy person's of softened netlike lamina membranacea posture profile, the atress deformation of netlike lamina membranacea 2 is transmitted to switch element 21 simultaneously, make switch element 21 atress effect disconnection, in time stop the operation of heating wire, avoid after carrying out the pendulum position operation, the condition that the heating wire forgotten to close, be convenient for in time carry out subsequent flow.

As an embodiment of the invention, the positioning frame 1 and the reset unit are of a frame structure, a support bed 6 capable of lifting is arranged below the net membrane plate 2, the support bed 6 is arranged in the reset unit, and the lifting limit of the support bed 6 is level with the net membrane plate 2;

when a radiotherapist is in a position setting process, in order to keep the position setting precision, a lying radiotherapist treatment bed 7 usually selects a hard bed board, so that the comfort of the radiotherapist in a lying state is reduced, the radiotherapist directly lies on the net membrane plate 2 in the positioning frame 1, the weight of the radiotherapist can cause excessive deformation of the net membrane plate in the position setting process, and the shaping state of the net membrane plate 2 is damaged; through setting up the support bed 6 of nethike embrane board 2 below liftable for the radiotherapy person of bearing pendulum position in-process avoids nethike embrane board 2 before the design to produce excessive deformation by radiotherapy person's weight influence at the pendulum position in-process, utilizes the nethike embrane board 2 of design to strengthen the travelling comfort that the radiotherapy person recumbered when reaching the pendulum position precision.

As an embodiment of the present invention, a plurality of supporting pads 61 are slidably installed on the top surface of the supporting bed 6 in the longitudinal axis direction, the supporting pads 61 respectively correspond to different areas of the net membrane plate 2, the supporting pads 61 have different protruding heights and respectively correspond to the head, waist and leg of the human body, and the supporting bed 6 is lowered to make the supporting pads 61 contact the supporting net membrane plate 2;

the table cushion 50 or the support cushion 61 is of an air bag type structure, each table cushion 50 or the support cushion 61 is provided with a rubber tube 62 communicated with an air source, and different air pressure values are set in the air sources communicated with each table cushion 50 or the support cushion 61;

a valve 63 is arranged on the rubber tube 62, the port of the valve 63 faces the net diaphragm plate 2, and the pipeline of the rubber tube 62 is fixed on the surface of the positioning frame 1 facing the outer side through the valve 63;

when a radiotherapist is positioned, the air filled in the table cushion 50 and the support cushion 61 at each position is correspondingly adjusted according to the body type and the radiotherapist part of the radiotherapist, so that the bearing performance of the table cushion 50 and the support cushion 61 on the radiotherapist meets the position requirement of the radiotherapist, in the process of adjusting the table cushion 50 and the support cushion 61, sufficient air is firstly filled in the table cushion 50 and the support cushion 61 to completely bulge the table cushion 50 and the support cushion 61 and support the omentum plate 2 to replace a hard bed plate of a radiotherapist equipment treatment bed 7 below the omentum plate 2, the comfort of the radiotherapist after lying on the omentum plate 2 is increased, the support bed 6 is lowered after the positioning is completed, the positioned human posture is guided to the shaping of the omentum plate 2, and the human posture adaptation and the shaping state of the omentum plate 2 in the radiotherapist process are maintained;

in the process of lowering the support bed 6 after the positioning is finished, the valve 63 on the rubber tube 62 is operated according to the lying position and comfort requirements of a radiotherapy person, the valve 63 can adopt a hand-push sliding switch valve, the hand-push sliding switch valve is small in size and low in cost, and is suitable for being installed on the rubber tubes 62 of a plurality of table cushions 50 and support cushions 61, the valve 63 is opened to enable gas in the table cushions 50 and the support cushions 61 to be blown to the surface of the net membrane 2 along the port of the valve 63 on the rubber tube 62 for assisting the temperature reduction of the net membrane 2 in a softened state, so that the net membrane 2 is quickly shaped, the time for keeping a fixed posture of the radiotherapy person is shortened, and the comfort of a radiotherapy body position fixing frame is improved;

in the duration of radiotherapy, a radiotherapy person needs to keep a relatively relaxed body state, the support pad 61 is arranged on the support bed 6 in a sliding manner to be adapted to the physiological bending positions of the spine, head and legs of the body of the radiotherapy person, so that the lying comfort of the radiotherapy person is improved, the support pad 61 is used for supporting the omentum plate 2 in the positioning frame 1, and the bearing capacity of the omentum plate 2 is enhanced; the cushion 50 and the support cushion 61 are arranged into an air bag type structure, the cushion 50 and the support cushion 61 for supporting different parts of the body provide differentiated supporting performance by matching with preset air pressure values of each cushion 50 and each support cushion 61, so that the body of a lying radiotherapist feels different soft and hard feelings of the cushion 50 and each support cushion 61, the cushion is suitable for the experience state that the body is in relaxation and comfort, meanwhile, the set air pressure values in the cushion 50 and the support cushion 61 at corresponding positions can be controlled according to the body part of the radiotherapist for carrying out the radiotherapist, the cushion 50 and the support cushion 51 of the air bag type structure at different positions on the positioning frame 1 are in an expansion tightening or contraction and relaxation state, the net membrane plate 2 used in positioning is matched, the body part of the radiotherapist is respectively kept in a high-precision fixed state and a relatively easy-moving state, and different parts of the body of the radiotherapist are balanced between a fixed rigid posture and comfortable experience in the process, thereby improving the comfort of the body position fixing frame.

The specific working process is as follows:

the body position of a radiotherapist is fixed through a mesh membrane plate 2 arranged on a positioning frame 1, after the posture position of a human body of the radiotherapist is changed when the radiotherapist lies and swings, the position and posture change of the positioning frame 1 are monitored through an angular velocity sensor, the parameter change monitored by the angular velocity sensor is processed through a controller, the operation parameter of a reset unit is controlled, the electrically controlled translation table 3 and the electrically controlled revolving frame 4 are arranged, the electrically controlled translation table 3 is fixedly arranged on a base 71 of a radiotherapist equipment treatment bed 7, the electrically controlled revolving frame 4 is fixed between the positioning frame 1 and the radiotherapist equipment treatment bed 7, the movement of the electrically controlled translation table 3 on the base 71 drives the treatment bed 7 to move, the rotation of the electrically controlled revolving frame 4 on the treatment bed 7 drives the positioning frame 1 to rotate, and then under the matching of the electrically controlled translation table 3 and the electrically controlled revolving frame 4, the position of the body of the radiotherapist is kept at a radiotherapist target radiotherapist head, the time required by the radiotherapy positioning process is reduced, so that the comfort of the radiotherapy positioning process is improved; when a radiotherapy person needs to adjust the body posture for the lying comfort, the controller runs, the electric control translation table 3 drives the radiotherapy equipment treatment bed 7 to move, and the electric control rotary frame 4 drives the positioning frame 1 to rotate, so that after the posture of the human body is changed, the posture change quantity generated by a radiotherapy part and a head of the radiotherapy equipment is reduced as much as possible when the position of the radiotherapy person is adjusted, the posture change quantity of the radiotherapy part of the human body and the head of the radiotherapy equipment is controlled within the range required by the radiotherapy process, and the comfort experience of the human body in the radiotherapy process is improved while the radiotherapy is stably carried out; by arranging the cushion 50 and the cushion 61 into an air bag structure and matching with the preset air pressure value of each cushion 50 and cushion 61, the cushion 50 and the cushion 61 for supporting different parts of the body provide differential supporting property, the lying radiotherapy person can feel different soft and hard feelings of the table cushion 50 and the support cushion 61, the bed is suitable for the body in the experience state of relaxation and comfort, meanwhile, the air pressure values set in the table cushion 50 and the support cushion 61 at corresponding positions can be controlled according to the body part of the radiotherapist to carry out the radiotherapist, so that the table cushion 50 and the support cushion 51 with the air bag type structures at different positions on the positioning frame 1 are in an expansion tight state or a contraction loose state, and the body part of the radiotherapist is respectively kept in a high-precision fixed state and a relatively easy moving state by matching with the net membrane plate 2 used in the positioning, balance the experience of fixed stiff posture and comfort for different parts of the body of a radiotherapy person during radiotherapy.

The radiotherapy body position fixing frame designed based on the invention performs a simulation test to detect the use effect:

1. preparation of the test

Informing medical staff of a hospital radiology department of the operation steps of the body position fixing frame, carrying out operation exercises, selecting volunteers as staff to be subjected to radiotherapy to carry out simulation positioning independently after the medical staff are familiar with the operation of the body position fixing frame, observing the time required by positioning in the whole radiotherapy process, carrying out simulation positioning 30 times once a day, wherein single simulation positioning lasts for 15min, and in the simulation positioning process: the time consumed by each positioning, the three-coordinate parameter value during each simulated positioning, the conservation rate of the positioning point within the duration of each simulated positioning and the comfortable feeling of the volunteer body after the simulated positioning is finished are taken as recording parameters.

2. Procedure of the test

Test equipment: selecting the same linear accelerator radiotherapy equipment treatment bed of a radiology department;

test subjects: simulating positioning points of two volunteers who are not subjected to radiotherapy positioning to select the liver;

grouping tests: respectively selecting a conventional body membrane fixing mode and a fixing frame in the invention to carry out simulated positioning, taking the measurement parameters of the volunteers fixed by the conventional body membrane as a control group, and taking the measurement parameters of the volunteers selected by the fixing frame in the invention as a test group;

test parameters are as follows:

firstly, in the process of analog positioning for the first time, timing is started when the membrane or the omentum plate is preheated and softened, and the timing is finished when the membrane or the omentum plate is cooled and shaped and a volunteer finishes the positioning posture, wherein the timing is used as the time t(s) consumed in the positioning process;

secondly, when the positioning is simulated again, the time for installing the shaped membrane or omentum plate is started, and the timing is finished when the volunteer finishes the positioning posture, so that the time t(s) consumed in the positioning process is taken;

thirdly, when the first simulation positioning is carried out, taking three coordinate values of the target point after the positioning is finished as an original point, and recording absolute values of three coordinate parameters of the target point after the subsequent positioning is finished as delta X (mm), delta Y (mm) and delta Z (mm);

fourthly, simulating the conservation rate of the target position in the positioning time: after the positioning is fixed, the human body is difficult to keep an absolute static state, the retention rate is the ratio of the time of coincidence of the target point of the simulated positioning and the body mark point within the simulated positioning duration time, namely the accuracy of the target area dosage is reflected and is expressed by T (%);

body comfort perception is the subjective perception of recording volunteers on the simulated positioning experience: and counting is carried out after the simulated positioning is finished, and 1-5 represent different comfort experiences respectively, wherein 1 represents the worst comfort experience (body ache) and 5 represents the best comfort experience (no strangeness).

3. Test data

In the test process, recording the data of each simulated positioning according to the test parameters; the following tables are shown, wherein Table one is a control group and Table two is a test group:

watch 1

Number of times	t(s)	∆X(mm)	∆Y(mm)	∆Z(mm)	T(%)	Feeling of comfort
							1	463	/	/	/	91	1
2	153	0.9	1.6	2.7	92	3
							3	150	1.3	2.9	1.6	98	3
4	168	1.0	1.4	1.6	96	3
							5	192	0.7	1.8	1.9	94	4
6	201	0.9	1.2	2.7	91	2
							7	179	1.4	2.0	2.9	91	3
8	165	0.5	1.6	3.8	97	2
							9	197	0.9	1.9	3.3	96	3
10	209	1.1	3.3	3.0	90	4
							11	188	0.6	1.9	2.4	92	2
12	160	1.3	3.1	3.9	99	4
							13	193	1.4	3.4	3.1	91	4
14	159	0.3	2.1	1.6	99	2
							15	186	0.8	1.0	3.1	90	2
16	192	1.2	3.0	1.5	91	2
							17	153	1.5	2.9	2.3	94	3
18	202	0.8	3.1	3.5	90	4
							19	169	0.8	2.3	2.7	90	4
20	184	1.4	2.0	3.9	98	4
							21	157	1.2	1.2	1.8	90	2
22	193	1.0	2.2	2.5	91	2
							23	167	0.9	1.1	3.8	96	2
24	200	1.5	2.5	4.5	90	4
							25	183	0.8	1.2	2.9	92	4
26	172	0.5	1.5	3.6	90	2
							27	174	1.0	2.7	2.0	97	3
28	152	1.5	3.4	3.7	97	4
							29	155	1.0	1.3	2.7	97	2
30	186	1.1	3.0	2.8	90	4

Watch two

Number of times	t(s)	∆X(mm)	∆Y(mm)	∆Z(mm)	T(%)	Feeling of comfort
							1	327	/	/	/	91	2
2	120	0.3	1.8	4.0	93	5
							3	169	1.0	1.6	4.3	96	4
4	122	1.0	0.7	3.5	95	4
							5	161	0.9	1.5	5.0	86	3
6	124	1.0	2.0	3.5	96	3
							7	149	0.1	1.6	3.0	92	5
8	160	0.9	1.6	4.7	93	5
							9	120	0.4	0.6	3.7	93	5
10	152	1.1	0.8	3.2	88	5
							11	153	0.3	1.5	5.3	86	4
12	128	1.0	0.5	5.9	89	4
							13	151	1.1	2.0	5.6	90	5
14	122	0.1	2.0	5.5	92	4
							15	167	0.5	0.8	4.0	86	4
16	120	0.7	1.6	2.8	89	3
							17	160	0.9	1.5	2.7	89	4
18	133	0.6	0.9	6.0	87	4
							19	132	0.9	1.1	3.4	96	5
20	123	0.9	0.8	4.4	86	3
							21	131	0.7	1.9	3.9	88	4
22	134	0.5	1.7	5.0	87	4
							23	135	0.9	0.8	4.2	90	5
24	161	0.8	1.9	4.2	90	3
							25	152	0.6	1.7	3.8	88	3
26	121	0.8	0.5	4.1	91	3
							27	127	0.8	1.7	2.8	86	4
28	136	0.2	1.1	2.2	91	5
							29	168	0.7	1.8	4.6	90	3
30	168	0.6	1.1	4.1	94	4

4. Data analysis

Based on the recorded raw data, the data of the control group and the test group are processed and analyzed to obtain the data of the mean value and the standard deviation of each parameter, which are shown in the following table:

watch III

Control group	t(s)	∆X(mm)	∆Y(mm)	∆Z(mm)	T(%)	Feeling of comfort
							Mean value	177	1.01	2.16	2.82	93.3	3.0
Standard deviation of	17.8	0.32	0.78	0.82	3.27	0.89

Watch four

Test group	t(s)	∆X(mm)	∆Y(mm)	∆Z(mm)	T(%)	Feeling of comfort
							Mean value	141	0.70	1.35	4.12	90.3	4.0
Standard deviation of	17.7	0.30	0.50	0.99	3.20	0.78

In summary, the following steps:

based on the data recorded in the table I and the table II when the body position fixing device is firstly placed, the body position fixing device represented by the test group saves about 30% of the time consumed in the first placing compared with the conventional body membrane fixing mode represented by the control group, and after the whole simulation positioning test is completed, the body of the volunteers in the control group feels aching pain and extremely poor comfort experience in the first placing process, and the body of the volunteers in the test group feels slightly good;

based on the statistical analysis data recorded in the third table and the fourth table, the time required for each subsequent positioning is reduced by about 20%, and on the data representing the positioning accuracy, it is found that the horizontal plane parameters represented by the Δ X and Δ Y values are reduced, the height difference represented by the Δ Z value is increased, and the actual error value of the space coordinate system is calculated:

to arrive at a mean value: Δ D control 3.693 mm; the delta D test group is 4.392 mm;

during clinical radiotherapy, the radiation field deviation allowance degree of a radiotherapy target area is required to be less than 5mm, and although the positioning precision of the fixing frame in the invention is reduced during simulated positioning, the fixing frame still meets the clinical requirement;

in the simulated positioning process: the T control group-T test group is 3 percent, and is less than the requirement that the dose accuracy of a target area in clinical radiotherapy is within the range of +/-5 percent;

in the whole simulation positioning process, the expected value of the comfort experience is better than that of the control group by one grade;

therefore, the improvement effect of the invention on the comfort of the body position fixing frame in the radiotherapy process is reflected.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A radiotherapy position fixing frame is characterized by comprising:

the positioning frame (1), the said positioning frame (1) is used for fixing the position of radiotherapy person;

the net membrane plate (2), the net membrane plate (2) is detachably arranged on the positioning frame (1) through bolts;

the resetting unit is arranged on a treatment bed (7) of radiotherapy equipment and used for adjusting the position and the posture of the positioning frame (1), the resetting unit comprises an electric control translation table (3) used for moving the treatment bed (7) and an electric control revolving frame (4) used for rotating the positioning frame (1), the electric control translation table (3) is fixedly arranged on a base (71) of the treatment bed (7), and the electric control revolving frame (4) is fixedly arranged on the base (71) below the treatment bed (7);

the heating unit is used for heating the net membrane plate (2) to a softening state;

a controller for controlling an operation of the reset unit;

the two sides of the positioning frame (1) are provided with supporting platforms (5) in a sliding mode, one side, facing the inside of the positioning frame (1), of each supporting platform (5) is fixedly provided with a protruding platform pad (50), and the platform pads (50) are located below the net membrane plate (2);

a buckling cavity (51) is formed in the supporting platform (5), the buckling cavity (51) penetrates through the supporting platform (5) to expose the surface of the positioning frame (1), a supporting buckle (511) for locking is installed in the buckling cavity (51), and a mark is arranged on the moving track of the supporting platform (5) of the positioning frame (1);

the positioning frame (1) and the reset unit are of a frame structure, a support bed (6) capable of lifting is arranged below the net membrane plate (2), the support bed (6) is installed in the reset unit, and the lifting limit of the support bed (6) is level to the net membrane plate (2);

a plurality of supporting cushions (61) are slidably mounted on the top surface of the supporting bed (6) in the longitudinal axis direction, and the supporting cushions (61) respectively correspond to different areas of the net diaphragm plate (2);

the heating unit also comprises an electric heating wire which is arranged on the net membrane plate (2);

the electric circuit of the electric heating wire in the net membrane plate (2) is electrically connected with a switch element (21), the switch element (21) is in a closed state in an initial state, and the switch element (21) is disconnected when the net membrane plate (2) is stressed and deformed.

2. The radiotherapy body position fixing frame according to claim 1, wherein a pair of retaining rings (512) are arranged on the periphery of the retaining ring (511), the retaining rings (512) are slidably mounted in the retaining cavity (51) in a direction parallel to the moving direction of the supporting platform (5), the retaining rings (512) and the retaining ring (511) are in threaded connection, and a spring (52) is fixedly connected between the retaining rings (512) and the retaining cavity (51).

3. The radiotherapy body position fixing frame according to claim 1, wherein the table cushion (50) or the support cushion (61) is of an air bag type structure, and each table cushion (50) or support cushion (61) is provided with a rubber tube (62) communicated with an air source.

4. A radiotherapy body position fixing frame according to claim 3, characterized in that the rubber tube (62) is provided with a valve (63), and the port of the valve (63) faces the reticular lamina (2).