CN217526132U - Standardized tumor part fixing and variation monitoring system - Google Patents

Abstract

A standardized tumor part fixing and variation monitoring system comprises a U-shaped body position plate, a restraining belt and a laser displacement sensor, wherein an ink box is detachably arranged on the U-shaped body position plate, and a heat-insulating pad capable of wrapping a patient is detachably arranged on the U-shaped body position plate; the two ends of the binding belt are respectively inserted in the middle of two side plates of the U-shaped body position plate, a plurality of pressure sensors are mounted on the inner surface of the binding belt, standardized grid lines and scale lines are arranged outside the binding belt, and a clamping groove belt is connected to the side edge of the binding belt; the U-shaped position plate is detachably inserted with a support rod, the support rod is rotatably provided with a transverse rod, and the transverse rod is provided with a square groove. The utility model discloses can fix the tumour position scientifically, standardly, monitoring range of change in its gradation, can gather, each link of analysis is to the data information of accurate radiotherapy influence, constantly optimizes tumour patient's individuation position fixed technology, realizes accurate radiotherapy's purpose.

Description

Standardized tumor part fixing and variation monitoring system

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a standardized tumor site is fixed and variation monitoring system.

Background

The aim of radiotherapy is to kill tumor cells and protect normal tissues as much as possible by using various rays, improve the life span of patients and reduce complications of radiotherapy. The accuracy of the tumor position is a prerequisite for achieving accurate radiotherapy. During clinical radiotherapy, various factors that may influence the tumor location change, such as: patient physiological movement, body position fixing system, target area or body deformation, and the like. Studies have shown that even rigid tumor sites are subject to minor variations or movements, let alone many parts of the human body are non-rigid anatomical structures. Therefore, various methods are necessary to reduce the influence of different factors on the accuracy of the tumor location.

At present, the body position fixing devices such as a vacuum pad, foam rubber, a thermoplastic film and different types of body frames are clinically adopted, so that the repeatability of the body position of a radiotherapy patient between times and in times is ensured, and the tumor position variation is reduced. However, these postural anchoring devices have several problems as follows.

Medical expenses. The vacuum pad, the foamed plastic, the thermoplastic film, different types of body frame, the price is nearly thousand yuan, and the price of the body position fixing system of the stereotactic radiotherapy is probably higher. The incidence of chinese tumors increases year by year, and more tumor patients need radiation therapy. The price of these medical consumables increases the medical burden on patients and countries, and is not conducive to advocating the concept of "value medicine".

Environmental impact. Except that the body frame can use repeatedly, other be disposable medical article, and medical waste after the use has certain influence to the environment, is unfavorable for advocating green policy.

Cross infection: because all patients use various types of racks uniformly, one person who does not have medical articles for use is easy to have the risk of cross infection for patients with skin diseases.

And (5) fixing effect. The vacuum pad can not control the respiratory motion of the patient and is not ideal to the fixed effect of the patient with loose skin, the foaming adhesive and the thermoplastic film are jointly used, although the physiological motion such as breathing can be controlled to a certain degree, medical workers only guess subjectively and whether the expected fixed effect is achieved, scientific basis is not provided, and therefore the loose or tight fixed result of the thermoplastic film often appears during fractionated radiotherapy, such as a large gap exists between the body surface of the patient and the thermoplastic film, and the fixed effect of the body position is reduced. The body position fixing devices can not timely find or monitor the tumor part variation because the tumor part is deformed due to the weight increase or the emaciation of the patient in the fractionated radiotherapy process. That is, how the tumor site of the patient should be fixed in a standardized manner and what level of fixation should be achieved, and there is no scientific method for guidance. In addition, the thermoplastic film is used in combination with a conventional postural support system without contacting or adhering to all of the patient's tumor site, with a small portion of the tumor site free in the space.

And a blind area. Clinically, the three-dimensional laser line is shielded or irradiated on the inclined surface of the body surface, and the "+" mark line cannot be directly marked, which is called a blind area. In this situation, an on-line reduction is required, increasing workload and time, and also increasing the patient's position uncertainty due to too long a reduction time. There are also tumor centers that may be estimated to be perfectly coincident with the body surface marker lines in order to save time in repositioning, so that visual errors can lead to increased uncertainty in the location of the tumor.

And space is occupied. Vacuum pad, foamed plastic, thermoplastic film, different grade type body frame is bulky, and each tumour center needs to design great equipment space such as goods frame, stores current position fixing device, especially in large-scale tumour center, and treatment area need be deposited in to many patients' position fixing device, leads to the crowding in treatment area.

Comfort level. Under the refrigeration condition of the indoor air conditioner for treating in summer and the low ambient temperature in winter, the patient generally reflects that the body position fixing frame and the thermoplastic film are very ice, so that the patient feels uncomfortable, and the patient can also be caused to catch a cold, particularly the old and young patients with weakness and diseases. Sometimes the patient reflects that the thermoplastic film is too tight and the tumor part has deep indentation, such as patients with head and neck and chest tumors and feel dyspnea

In the case of interfractionated radiotherapy, physiological motion of a tumor part is a common cause of tumor position variation, and currently, clinically, the physiological motion of a fractionated radiotherapy technology is mainly monitored by using a light surface guidance technology, an online X-ray technology, a 4DCT technology and the like, but these medical devices have higher use cost.

However, the existing invention adopts the body position fixing technology which is continuously updated or a touch alarm system to achieve the purpose of reducing the body position variation in multiple times, but cannot monitor the body position variation track in real time and further cannot guide, optimize and determine the allowable range of the variation range of the tumor part in the positioning and resetting stages.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, the utility model provides a standardized tumour position is fixed and variation monitoring system, and concrete technical scheme is:

a standardized tumor part fixing and variation monitoring system comprises a U-shaped body position plate, a restraining belt and a laser displacement sensor, wherein an ink box is detachably arranged on the U-shaped body position plate, and a heat-insulating pad capable of wrapping a patient is detachably arranged on the U-shaped body position plate; the two ends of the binding belt are respectively inserted in the middle of the two side plates of the U-shaped body position plate, a plurality of pressure sensors are mounted on the inner surface of the binding belt, standardized grid lines and scale lines are arranged on the outer surface of the binding belt, and a clamping groove belt is connected to the side edge of the binding belt; the U-shaped position plate is detachably spliced with a supporting rod, a transverse rod extending to the upper side of the binding belt is rotatably arranged on the supporting rod, and a plurality of square grooves used for mounting the laser displacement sensor are formed in the transverse rod.

Furthermore, both ends of the binding belt are provided with fastening belts with scale marks, the fastening belts are uniformly provided with a row of clamping through grooves, and the clamping through grooves are adjustably clamped in two side plates of the U-shaped body position plate.

Furthermore, the top surface of U type position board both sides board has all seted up the fixed slot downwards, the lateral surface of U type position board both sides board has all seted up and to have made to detain the play hole groove of taking out from the fixed slot in, be provided with the spring clamp in the fixed slot, be provided with one row on the spring clamp and lead to groove assorted block lug with the block.

Furthermore, the spring clamp includes the fixed plate and articulates the control panel on the fixed plate, be provided with the torsional spring between fixed plate and the control panel, the control panel just faces out the hole groove, the block lug sets up on the surface of control panel.

Furthermore, the bottom surface of the U-shaped position plate is a planar bottom plate which can be stably placed on the treatment bed, the two ends of the bottom surface in the U-shaped position plate are inclined plane plates, and the top surfaces of the inclined plane plates and the top surfaces of the two side plates of the U-shaped position plate are provided with scale marks.

Furthermore, the top end of the supporting rod is provided with a universal ball with a limiting nut, and one end of the transverse rod is arranged on the top surface of the universal ball.

The utility model discloses beneficial effect:

(1) The tumor part can be fixed scientifically and normatively, the clinical workload is reduced, the working efficiency and the patient satisfaction are improved, the variation range in the gradation is monitored, the repeated utilization can be realized, and the medical cost and the waste of medical resources are reduced.

(2) When the tumor part is positioned and reset, the data information of the influence of each link on the precise radiotherapy can be collected and analyzed, the individualized body position fixing technology of the tumor patient is continuously optimized, the purpose of the precise radiotherapy is realized, the survival rate of the patient is improved, and the occurrence of complications is reduced.

Drawings

Fig. 1 is an overall schematic view of the present invention.

Fig. 2 is a schematic view of a U-shaped position plate of the present invention.

Fig. 3 is a development view of the binding belt of the present invention.

Fig. 4 is a schematic view of the spring clip of the present invention.

Fig. 5 is an installation diagram of the laser displacement sensor of the present invention.

In the figure: 1U type position board, 11 box grooves, 12 post type draw-in grooves, 13 plane bottom plates, 14 inclined plane boards, 15 fixed grooves, 16 hole outlet grooves, 17 buckles, 2 constraint belts, 21 circular grooves, 22 buckle belts, 23 clamping through grooves, 24 clamping groove belts, 3 heat preservation pads, 4 laser displacement sensors, 41 support rods, 42 limit nuts, 43 universal balls, 44 hemispherical grooves, 45 transverse rods, 46 square grooves, 5 ink box, 6 pressure sensors, 7 spring clamps, 71 fixed plates, 72 control plates, 73 clamping protruding blocks, 8 scale marks and 9 treatment beds.

Detailed Description

The invention will be further described with reference to the following drawings and specific embodiments:

as shown in fig. 1 to 5, a standardized tumor site fixation and mutation monitoring system, comprises a U-shaped body position plate 1, a binding belt 2 and a laser displacement sensor 4, the U-shaped position plate 1 is detachably provided with an ink box 5, and the U-shaped position plate 1 is detachably provided with a heat preservation pad 3 capable of wrapping a patient; the two ends of the constraint belt 2 are respectively inserted in the middle of two side plates of the U-shaped body position plate 1, the inner surface of the constraint belt 2 is provided with a plurality of pressure sensors 6, and the outer surface of the constraint belt 2 is provided with standardized grid lines and scale lines 8 which are used as reference marks for positioning and resetting so as to fix the reference marks of tumor positions; the side edge of the constraint belt 2 is connected with a slot belt 24 for storing patient information and positioning parameters, and the patient information and the positioning parameters are checked when radiotherapy is implemented, so that the medical safety is ensured and an accurate radiotherapy target is realized; the U-shaped position plate 1 is detachably inserted with a support rod 41, the support rod 41 is rotatably provided with a transverse rod 45 extending above the binding belt 2, and the transverse rod 45 is provided with a plurality of square grooves 46 for mounting the laser displacement sensor 4.

Two circular grooves 21 are formed in two sides of the center of the binding belt 2 and used for storing and fixing the pressure sensor 6 and ensuring that the joint of the pressure sensor 6 is in direct contact with a tumor part; the output pressure value can objectively express the tightness degree of the restraining belt 2 through the pressure sensing of the pressure sensor 6 and the tumor part during positioning and resetting.

The front ends of the top surfaces of the two side plates of the U-shaped position plate 1 are respectively provided with a box groove 11 and a column-shaped clamping groove 12, the ink line box 5 is stored in the box groove 11, and the supporting rod 41 is inserted into the column-shaped clamping groove 12; the top surfaces of the two side plates of the U-shaped body position plate 1 are provided with a plurality of buckles 17 for fixing the heat preservation pad 3, so that the cold feeling of a patient on the body position fixing frame is solved. The ink line box 5 can pull out and store the marking line, and the body surface marking is carried out by utilizing the superposition of the marking line and the laser line.

As shown in fig. 1 and 2, the bottom surface of the U-shaped position plate 1 is a planar bottom plate 13 which can be stably placed on the treatment couch 9, so as to be naturally coupled with the treatment couch 9; the inner center of the U-shaped position plate 1 adopts a U-shaped design, U-shaped grooves with different specifications can be manufactured according to the radiotherapy part of a patient, and the U-shaped grooves and the binding belts 2 are used singly or in combination to fix the individual position of the patient; the two ends of the inner bottom surface of the U-shaped body position plate 1 are provided with inclined plane plates 14, so that the body of a patient is in parallel butt joint between the body position plate and the surface of the treatment bed 9, and the discomfort caused by long-time radiotherapy of the patient is eliminated; the top surfaces of the inclined plane plate 14 and the two side plates of the U-shaped position plate 1 are provided with scale marks 8 which are used for providing basis for fixing the U-shaped position plate 1 in the positioning and resetting stages.

As shown in fig. 3, both ends of the restraining belt 2 are provided with a buckle belt 22 with scale marks 8, a row of fastening through grooves 23 are uniformly formed on the buckle belt 22, and the fastening through grooves 23 are adjustably fastened in two side plates of the U-shaped body position plate, so that the restraining belt 2 can be fixed on the U-shaped body position plate 1 in a standardized manner.

In one embodiment, the top surfaces of the two side plates of the U-shaped position plate 1 are both provided with downward fixing grooves 15, the outer side surfaces of the two side plates of the U-shaped position plate 1 are both provided with hole outlet grooves 16 through which the fastening belt 22 can penetrate out of the fixing grooves, a spring clamp 7 is arranged in the fixing groove 15, and a row of fastening protrusions 73 matched with the fastening through grooves 23 is arranged on the spring clamp 7.

As shown in fig. 4, the spring clip 7 includes a fixing plate 71 and a control plate 72 hinged on the fixing plate 71, a torsion spring is disposed between the fixing plate 71 and the control plate 72, the control plate 72 faces the hole slot 16, and the engaging protrusion 73 is disposed on an outer surface of the control plate 72.

The spring clip 7 is fixed in the fixing groove 15 by a screw, the buckle belt 22 penetrates into the fixing groove 15 and then penetrates out of the hole outlet groove 16, and the clamping through groove 23 is clamped into the clamping protrusion 73, so that the buckle belt 22 is fixed on the U-shaped body position plate 1, and a tumor part of a patient is fixed by the constraint belt 2. According to the difference of the radiotherapy part of the patient, the binding belt 2 with different specifications can be manufactured, and the purpose of individually fixing the body position is achieved.

As shown in fig. 5, the laser displacement sensor 4 is installed in a square groove 46 on the beam, and measures the variation range of the tumor part by reflecting laser light.

In another embodiment, the top end of the supporting rod 41 is provided with a universal ball 43 with a limit nut 42, and one end of the transverse rod 45 is arranged on the top surface of the universal ball 43.

Wherein, a hemispherical groove 44 is arranged on the supporting rod 41, and the universal ball 43 can be horizontally and rotatably arranged in the hemispherical groove 44; the limiting nut 42 is penetratingly disposed on the hemispherical groove 44, and can compress the universal ball 43 for limiting.

In other embodiments, the U-shaped position plate 1 can be made of carbon fiber material or high-strength thermoplastic composite material, the maximum thickness of the planar bottom plate 13 can be controlled to be 1.5cm, and the maximum thickness of the two side plates can be controlled to be 3cm, so that the influence on the absorbed dose is small; the U-shaped position plate 1 can be sterilized, and (4) recycling.

The heat preservation pad can be made of plush fabric, the size of the heat preservation pad is different according to different sizes of tumor parts, but the thickness is controlled within 2mm, so that the influence of the heat preservation pad on the accuracy of the tumor position is reduced, and the heat preservation pad can be repeatedly cleaned, thermally sterilized and the like and can be repeatedly used.

The binding belt 2 can be made of cheap inelastic flax, the thickness can be controlled within 2mm, the attenuation of radiotherapy rays is hardly influenced, standardized grid lines are printed on the surface of the binding belt, and the edges of two sides are millimeter-scale lines 8; the binding belt 2 can be sterilized and reused by ethylene oxide.

The U-shaped body position plate 1, the binding belt 2 and the heat preservation pad can be adaptively selected according to the body characteristics and the tumor part of a patient, so that the purpose of individualized body position fixing is achieved.

The pressure sensor 6, the laser displacement sensor 4 and the ink line box 5 are of conventional models in the market, individual use is not needed, and only one set of pressure sensor, laser displacement sensor and ink line box is needed to be prepared for each treatment area in a simulation positioning stage.

The coordinate system specified by the international electrotechnical commission is adopted, the origin of coordinates represents the geometric center of the tumor part, the cross centers of three-dimensional laser lines in the simulation positioning room and the treatment room and the mechanical isocenter of the medical accelerator are the same center.

The pressure value displayed by the pressure sensor 6, the variation amplitude of the tumor part displayed by the laser displacement sensor 4 and the tolerance degree of the patient can be optimized for posture fixation, the binding belt 2 is finally fixed according to scale values on two sides of the binding belt 2, the patient is fixed, and scientific and standardized posture fixation is realized.

The implementation process is generally divided into a tumor patient simulation positioning stage and a treatment implementation stage.

(1) Simulation positioning stage

According to the specific tumor part and body characteristics of a patient, a U-shaped body position plate 1 and a binding belt 2 are selected to realize individualized body position fixing, and a pressure sensor 6, a laser displacement sensor 4 and a heat preservation pad 3 are installed at the same time; the pressure data formed between the restraining strip 2 and the patient's skin is transmitted to a display and recorded as a reference for simulated positioning and reduction of the applied radiation therapy.

The number of the laser displacement sensors 4 is selected and installed in the square groove 46, the laser displacement sensors 4 monitor the variation range of the tumor part of the radiotherapy patient in each time and among times, and the auxiliary pressure sensor 66 determines the fixing effect of the optimal constraint belt 2.

And fixing the U-shaped body position plate 1 and a proper position on the simulation positioning bed by referring to a three-dimensional laser system in the positioning room and the scale marks 8 on the U-shaped body position plate 1 so as to ensure that the position of the equivalent center relative to the machine is unchanged, and recording scale values of the U-shaped body position plate 1 in the left-right direction and the up-down direction of the equivalent center.

Ordering a patient to expose a tumor part, stably placing the tumor part on a U-shaped body position plate 1, and preliminarily fixing the tumor part of the patient by using a binding belt 2; according to the comfort degree or the body position variation allowable range of the patient, the pressure value of the pressure sensor 6 and the body position variation amplitude of the laser monitoring, namely the pressure value and the body position variation amplitude displayed on the display, the variation relation among the three is continuously and circularly optimized by adjusting the buckle belt 22; finally, the degree of tightness or the fixing effect of the binding band 2 is determined, and the buckle belt 22 is fixed on the spring clip. The scale values of the fixing of the buckle belt 22 and the treatment scale values of the indoor three-dimensional laser system on the left, right, up, down, front and back of the binding belt 2 are recorded. It is particularly noted that the position of the graduation marks 8 on the U-shaped position plate 1 relative to the three-dimensional laser is not changed.

The treatment bed 9 is moved up and down, the laser lines of the laser displacement sensor 4 are moved to the upper edge and the lower edge of the constraint belt 2, the upper and the lower parts of the body surface marks in the shape of a plus are respectively drawn by using the marking lines in the ink line box 5 and are used as reference bases for implementing radiotherapy resetting, and finally the scale lines 8 on the U-shaped body position plate 1 corresponding to the marks are recorded. The method for marking the "+" shaped body surface mark by the marking line comprises the following steps: and pulling out the marking line to be completely superposed with the laser line, and slightly flicking the marking line to leave a straight trace on the body surface.

All the parameters and the information of the patient are registered in a memo in detail, and the relevant treatment auxiliary information such as date is written, and the information of the patient and the reference parameters are checked and reset during radiotherapy by placing the information in a card slot.

After the U-shaped body position plate 1 and all parts are adopted to fix the body position, the scanning positioning image is started and transmitted to a treatment planning system according to the position and the characteristics of the tumor of the patient, and the scanning positioning image is used as a planning image of radiotherapy, including CT, MRI, PET-CT and the like.

After the scanning is finished, the buckle belt 22 is directly unlocked through the control panel 72, the patient is helped to get off the positioning bed, and the individualized U-shaped body position fixing devices such as the body position plate 1 and the constraint belt 2 are placed in the treatment area of the patient for use when the radiotherapy is reset.

(2) Performing a radiotherapy session

Specifically, the following are mentioned: the laser system in the positioning room corresponds to the mechanical isocenter, and the three-dimensional laser system in the radiotherapy room also corresponds to the mechanical isocenter. Namely, the two sets of three-dimensional laser systems have equivalent functions of positioning the tumor at the mechanical center.

Calling a patient and checking patient information, according to the positioning condition of the simulated positioning stage, instructing the patient to prepare before treatment, preparing the U-shaped body position plate 1 and other components, and installing the heat preservation pad 3 on the U-shaped body position plate 1.

Primary registration: according to the parameters during positioning, the U-shaped position plate 1 is fixed on a treatment bed 9 by referring to the three-dimensional laser system in the treatment room and the scale marks 8 on the U-shaped position plate 1, namely the spatial positions of the U-shaped position plate 1 and the mechanical isocenter are kept consistent during relative positioning.

Secondary registration: ordering and assisting the patient to lie on the treatment bed 9 and expose the tumor part on the U-shaped body position plate 1, and resetting the tumor part of the patient according to the parameters during positioning, the three-dimensional laser system in the treatment room, the '+' shaped body surface mark during positioning and the like. Firstly, the tumor part is accurately and unmistakably fixed on the U-shaped body position plate 1, then the treatment bed 9 is moved to ensure that the laser line in the treatment room is completely coincided with the left, right, up, down, front and back treatment scale values on the constraint belt 2, and finally the buckle belt 22 is fixed according to the scale value during positioning. The main purpose is to realize the consistency of the space position and the positioning of the tumor part relative to the U-shaped model position plate 1, further ensure the invariance of the space position of the tumor part relative to the mechanical isocenter,

in the stage of secondary registration, the pressure sensor 6 is selected in real time and is arranged in the circular groove according to the change condition of the tumor part of the patient, so that the change of the body surface contour of the tumor part of the patient during radiation treatment in a time division manner can be monitored, and a scientific basis is provided for redesigning a treatment plan of the patient.

Three-stage registration: after the reduction is finished, an image guided technology (IGRT) is implemented according to a quality assurance strategy in a radiotherapy plan, and the main aim is to check whether the tumor part is correct or different by scanning a CT image of the tumor part and a plan CT image to ensure the accuracy of tumor radiotherapy.

After determining the tumor location and correcting the tumor location differences, fractionated radiation therapy is initiated.

In the process of multiple internal radiation treatment, the change amplitude of the tumor part of a patient is monitored by a laser position sensor so as to determine the influence degree of the tumor position by physiological motion, particularly the tumor of the chest and abdomen.

After the fractionated radiotherapy is finished, the buckle belt 22 is directly unlocked through the control plate 72, the restraining belt 2 is taken down to assist the patient to get off the bed, the individualized U-shaped body position plate 1, the restraining belt 2 and the like are placed at the designated positions of the treatment area of the patient, and other components are placed at the designated positions in the treatment room.

During the interval radiotherapy, if the "+" shaped body surface mark is found to be light, the ink box 5 can be used for continuously adding the "+" shaped mark on the original mark.

After the radiotherapy treatment course of the patient is finished, the individualized U-shaped body position plate 1, the binding belt 2, the heat preservation pad 3 and the like are recovered, cleaned and disinfected, and then stored in a non-treatment area for repeated use, so that the consumption of medical resources is reduced, and the medical expense of the patient is greatly reduced.

The data of the cyclic optimization in the positioning stage, the data of the three-stage registration in the treatment implementation stage and the variation range of the tumor part of the patient in each time are collected to a computer system, the relation between the data and the tumor position accuracy is analyzed, the individualized body position fixing technology is continuously optimized, the actual utility of the research system is improved, and the purpose of accurate radiotherapy is achieved.

It is necessary to show that the monitoring device plays a role in binding and reducing amplitude during positioning, and the treatment stage plays a role in monitoring the variation of the endosome position in the fraction for research and analysis. The positions of the two are different, and the detection position in the treatment stage is at the treatment position displayed by the laser line.

Claims (6)

1. A standardized tumor site fixation and mutation monitoring system, comprising: the device comprises a U-shaped position plate, a binding belt and a laser displacement sensor, wherein an ink box is detachably arranged on the U-shaped position plate, and a heat-preservation pad capable of wrapping a patient is detachably arranged on the U-shaped position plate; the two ends of the binding belt are respectively inserted in the middle of the two side plates of the U-shaped body position plate, a plurality of pressure sensors are mounted on the inner surface of the binding belt, standardized grid lines and scale lines are arranged on the outer surface of the binding belt, and a clamping groove belt is connected to the side edge of the binding belt; the U-shaped positioning plate is detachably inserted with a supporting rod, a transverse rod extending to the upper side of the binding belt is rotatably arranged on the supporting rod, and a plurality of square grooves used for mounting the laser displacement sensor are formed in the transverse rod.

2. The standardized tumor site fixation and variation monitoring system of claim 1, wherein: the two ends of the binding belt are both provided with buckling belts with scale marks, the buckling belts are uniformly provided with a row of clamping through grooves, and the clamping through grooves are adjustably clamped in the two side plates of the U-shaped body position plate.

3. The standardized tumor site fixation and variation monitoring system of claim 2, wherein: the top surface of U type position board both sides board has all seted up the fixed slot downwards, the lateral surface of U type position board both sides board has all seted up and to have made to detain the play hole groove of taking out from the fixed slot in, be provided with the spring clamp in the fixed slot, be provided with one row on the spring clamp and lead to groove assorted block protruding piece with the block.

4. A standardized tumor site immobilization and variation monitoring system as claimed in claim 3, wherein: the spring clamp comprises a fixed plate and a control plate hinged to the fixed plate, a torsion spring is arranged between the fixed plate and the control plate, the control plate is right opposite to the hole outlet groove, and the clamping protruding block is arranged on the outer surface of the control plate.

5. The standardized tumor site fixation and variation monitoring system of claim 1, wherein: the bottom surface of U type position board is the plane bottom plate that can stably place on the treatment bed, and the both ends of bottom surface are the inclined plane board in the U type position board, the top surface of inclined plane board and U type position board both sides board all is provided with the scale mark.

6. The standardized tumor site fixation and variation monitoring system of claim 1, wherein: the top end of the supporting rod is provided with a universal ball with a limiting nut, and one end of the transverse rod is arranged on the top surface of the universal ball.

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