Radiotherapy positioning device with double-layer film

Abstract

The utility model provides a radiotherapy positioning device with a double-layer film. The radiotherapy positioning device comprises a supporting frame, a lower positioning film and an upper positioning film. The lower positioning film comprises a lower frame and a lower thermoplastic film; a plurality of first shaping holes are formed in the lower thermoplastic film; the upper positioning film comprises an upper frame and an upper thermoplastic film; the upper thermoplastic film is provided with a plurality of second shaping holes. During use, the supporting frame is fixed on the head, neck and shoulder bottom plate, and the lower positioning film is heated and then fixedly mounted above the supporting frame; the patient lies on the back and is pressed downwards, and the lower thermoplastic film is attached to the body surface of the patient and cured; the upper positioning film is heated and covers the front surface of the patient, the upper frame is pulled downwards and fixedly connected with the lower frame, and the lower thermoplastic film is attached to the body surface of the patient and cured. The lower thermoplastic film is easy to operate, short in curing time and free of peculiar smell in the shaping and curing process, meanwhile, the lower thermoplastic film is provided with the air holes, heat dissipation can be facilitated, and therefore the comfort level and the treatment effect of a patient can be guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a radiotherapy positioning device with a double membrane. Background Technology

[0002] Radiation therapy (RT) is a treatment method that uses high-energy rays or other particle beams to kill cancer cells or prevent their growth. The basic principle is that high-energy X-rays, gamma rays, electron beams, proton beams, and other rays can penetrate human tissue, destroy the DNA of cancer cells, thereby killing them or preventing their division and growth.

[0003] During radiotherapy, doctors need to determine the specific location and size of the tumor based on imaging examination results. Then, they strictly design the radiotherapy target area according to the tumor's outline and the purpose of radiotherapy, and implement the treatment. Radiotherapy localization is a crucial step in the radiotherapy process. It refers to fixing and determining the location and extent of the radiotherapy before radiotherapy using imaging equipment and specialized fixation devices, ensuring the accuracy and repeatability of the radiotherapy procedure. During radiotherapy localization, a fixation device needs to be fabricated to ensure the patient's positional stability during radiotherapy, allowing for precise irradiation of the tumor site.

[0004] Clinically, for radiotherapy to areas such as the chest and abdomen, a positioning film is typically used for positioning on the patient's chest, while a positioning pad made of foaming agent is used for positioning on the patient's back (e.g., Figure 7 (As shown). The positioning film consists of a frame and a thermoplastic film. To use, soak the positioning film in hot water to soften it, then cover the patient's head, neck, and shoulders. Press the frame down to conform the thermoplastic film to the patient's body contours. Secure the frame to the head, neck, and shoulder base plate under the patient and allow it to cool and solidify completely. The foaming agent consists of two components, A and B. To use, first place the foaming mold on the head, neck, and shoulder base plate, ensuring proper positioning. Then mix components A and B and pour the mixture into the mold, ensuring even distribution. Instruct the patient to lie down slowly, ensuring their back is firmly against the foaming mold. The foaming agent will begin to foam and solidify within ten minutes. The solidified foam material will firmly fix the patient's back, thus providing positioning. Although foamed materials can achieve positioning of the patient's back, they still have at least the following drawbacks: 1) Foaming agents usually contain catalysts, which can easily have a certain impact on the human body and the environment during production and use, resulting in poor environmental friendliness; 2) Foaming agents generate heat during the foaming process, which can easily cause discomfort to patients during the curing process; 3) Foaming agents have a long curing time, requiring patients to maintain one posture for a long time, which may not only cause physical discomfort to patients but also increase their psychological stress; 4) Foaming agents produce odors during the curing process, which may cause discomfort to patients and medical staff.

[0005] Therefore, there is a need for a positioning device that has a short molding time, no odor, low heat generation, and easy heat dissipation. Utility Model Content

[0006] Therefore, the technical problem to be solved by this utility model is to overcome the technical defects of the existing technology, which generally uses positioning pads made of foaming agents to position the patient's back. However, foaming agents have problems such as poor environmental performance, long foaming time, easy generation of odor during foaming, and large heat generation during foaming, which may cause discomfort to the patient. Therefore, this invention provides a radiotherapy positioning device with a double-layer membrane that has a short shaping time, no odor, low heat generation, and easy heat dissipation.

[0007] Therefore, this utility model provides a radiotherapy positioning device with a double-layer membrane, comprising:

[0008] The supporting frame has a certain height;

[0009] The lower positioning film, which covers and is installed above the support frame, includes a lower frame and a lower thermoplastic film fixedly installed on the lower frame; the lower frame is detachably connected to the support frame; the lower thermoplastic film is provided with a plurality of first shaping holes;

[0010] An upper positioning film, which covers and is installed above the lower positioning film, includes an upper frame and an upper thermoplastic film fixedly installed on the upper frame; the upper frame is detachably connected to the support frame and / or the lower frame; the upper thermoplastic film is provided with a plurality of second shaping holes.

[0011] Furthermore, it also includes an installation structure, the installation structure comprising:

[0012] The first fixing hole is multiple, which are opened on the top of the support frame and are spaced apart along the extension direction of the support frame;

[0013] There are multiple second fixing holes, which are formed on the lower frame and correspond to the first fixing holes respectively;

[0014] There are multiple third fixing holes, which are formed on the upper frame and correspond to the first fixing holes respectively;

[0015] Multiple fixing pins are provided, each suitable for passing through the corresponding second fixing hole and third fixing hole and then being fixedly connected to the corresponding first fixing hole.

[0016] Furthermore, the first shaping hole and / or the second shaping hole are both hexagonal honeycomb-shaped.

[0017] Furthermore, the edges forming the first and / or second shaping holes are all thicker in the middle and thinner at both ends.

[0018] Furthermore, the upper thermoplastic film has an opening at the position corresponding to the nose of a human face.

[0019] Furthermore, an operating handle is provided on the outer wall of the upper frame.

[0020] Furthermore, a positioning structure is provided between the upper frame and the lower frame. The positioning structure includes a positioning post and / or a positioning hole provided on the upper frame, and a positioning hole and / or a positioning post provided on the lower frame; the positioning hole and the positioning post can be inserted and engaged.

[0021] Furthermore, the support frame includes an upper support bar and a lower support bar arranged opposite each other, and a plurality of middle support rods connecting the upper support bar and the lower support bar.

[0022] Furthermore, the lower support bar is provided with a number of bottom fixing holes at intervals.

[0023] Furthermore, the upper thermoplastic film 32 and the lower thermoplastic film 22 are the same thermoplastic film.

[0024] The technical solution provided by this utility model has the following advantages:

[0025] This utility model discloses a radiotherapy positioning device with a double-layer membrane, comprising a support frame, a lower positioning membrane, and an upper positioning membrane. The support frame has a certain height. The lower positioning membrane is installed over the support frame and includes a lower frame and a lower thermoplastic membrane fixedly installed on the lower frame. The lower frame is detachably connected to the support frame. The lower thermoplastic membrane is provided with a plurality of first shaping holes. The upper positioning membrane is installed over the lower positioning membrane and includes an upper frame and an upper thermoplastic membrane fixedly installed on the upper frame. The upper frame is detachably connected to the support frame and / or the lower frame. The upper thermoplastic membrane is provided with a plurality of second shaping holes.

[0026] This utility model discloses a radiotherapy positioning device with a double-layer membrane. Both the lower and upper positioning membranes are made of thermoplastic materials, which can be softened in warm water at 65-70℃, thus allowing them to be stretched and shaped. They will solidify and set when cooled to a normal temperature (such as 10-30℃). The support frame can be detachably connected to the treatment bed or head, neck, and shoulder base plate in the hospital, thereby fixing the support frame to the treatment bed or head, neck, and shoulder base plate. In use, first fix the support frame to the head, neck, and shoulder base plate, then place the lower positioning film in a 65-70℃ constant temperature water bath. After the lower thermoplastic film softens, remove it, dry it with a towel or paper towel, and then fix it on top of the support frame. Have the patient lie supine, place the head, neck, and shoulders in the appropriate position of the lower thermoplastic film and press down. Gently press the thermoplastic film on the neck and shoulders with your hands or a special tool to make it conform to the patient's body contours. (Alternatively, a sponge pad can be placed under the lower thermoplastic film, the shape of which matches the contours of the neck and shoulders, to assist the lower thermoplastic film in conforming to the patient's body contours.) (Apply to the body surface), and completely wrap and support the patient's posterior surface; wait until the lower thermoplastic film has completely cooled and solidified; place the upper positioning film in a 65-70℃ constant temperature water bath, and remove it after the upper thermoplastic film has softened, then use a dry towel or paper towel to absorb the moisture; cover the patient's anterior surface with the upper thermoplastic film, and at the same time pull down the upper edge to fix it to the support frame and / or the lower edge; use your hands or special tools to gently press the thermoplastic film on the forehead, bridge of the nose, nostrils, lips, jaw, external auditory canal, head, shoulders, etc., to make it conform to the patient's body surface contours, and then wait until the upper thermoplastic film has completely cooled and solidified.

[0027] This embodiment of the radiotherapy positioning device with a double-layer membrane uses a lower positioning membrane instead of a traditional foaming agent to position the patient's back. The lower thermoplastic membrane does not require material mixing or spreading during the shaping process, making the operation relatively simple. The lower thermoplastic membrane has a short curing time, thus eliminating the need for the patient to maintain one posture for a long time, reducing patient discomfort. The lower thermoplastic membrane is odorless during shaping and curing, and has ventilation holes to facilitate heat dissipation, thereby avoiding patient discomfort and improving patient cooperation during radiotherapy, which in turn helps ensure treatment effectiveness and patient comfort. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the prior art or specific embodiments of this utility model, the accompanying drawings used in the description of the prior art or specific embodiments are briefly introduced below.

[0029] Figure 1 This is a front view of the radiotherapy positioning device with a double membrane according to this utility model.

[0030] Figure 2 This is a schematic diagram of the overall structure of the supporting frame.

[0031] Figure 3 This is a top view of the lower support frame.

[0032] Figure 4 yes Figure 3 A magnified structural diagram of part A in the middle.

[0033] Figure 5 This is a top view of the upper support frame.

[0034] Figure 6 This is a schematic diagram of the pin structure.

[0035] Figure 7 This is a schematic diagram of a back positioning pad made using a foaming agent in the prior art.

[0036] Figure 8 It is the frame before the first layer of positioning film is placed.

[0037] Figure 9 This is a structural diagram of the first positioning membrane.

[0038] Figure 10 This is a structural diagram showing a model placed on the first positioning membrane instead of a person.

[0039] Figure 11 This is a structural diagram of placing a second positioning membrane on the model.

[0040] Reference numerals: 1. Support frame; 11. Upper support bar; 12. Lower support bar; 120. Bottom fixing hole; 13. Middle support rod; 111. First fixing hole; 112. Fixing pin; 2. Lower positioning film; 21. Lower frame; 211. Second fixing hole; 213. Positioning hole; 22. Lower thermoplastic film; 220. First shaping hole; 3. Upper positioning film; 31. Upper frame; 311. Third fixing hole; 312. Operating handle; 313. Positioning post; 32. Upper thermoplastic film; 320. Second shaping hole; 321. Clearance opening. Detailed Implementation

[0041] To enable those skilled in the art to better understand this solution, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0042] It should be noted that the terms "first," "second," etc., in the claims and specification of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such as a process, method, system, product, or device that includes a series of steps or units, not limited to those steps or units explicitly listed, but may also include other steps or units not explicitly listed or inherent to these processes, methods, products, or devices.

[0043] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the term "multiple" should mean two or more. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0044] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0045] This embodiment provides a radiotherapy positioning device with a double-layer membrane, such as... Figure 1-6 As shown, the device includes a support frame 1, a lower positioning film 2, and an upper positioning film 3. The support frame 1 has a certain height. The lower positioning film 2 is installed over the support frame 1 and includes a lower frame 21 and a lower thermoplastic film 22 fixedly installed on the lower frame 21. The lower frame 21 is detachably connected to the support frame 1. The lower thermoplastic film 22 is provided with a plurality of first shaping holes 220. The upper positioning film 3 is installed over the lower positioning film 2 and includes an upper frame 31 and an upper thermoplastic film 32 fixedly installed on the upper frame 31. The upper frame 31 is detachably connected to the support frame 1 and / or the lower frame 21. The upper thermoplastic film 32 is provided with a plurality of second shaping holes 320.

[0046] In this embodiment, both the lower positioning film 2 and the upper positioning film 3 are thermoplastic materials that can be softened in warm water at 65-70°C, thus allowing them to be stretched and shaped; they will solidify and set when cooled to a normal temperature (such as 10-30°C); the support frame 1 can be detachably connected to the treatment bed or head, neck and shoulder base plate in the hospital, thereby fixing the support frame 1 to the treatment bed or head, neck and shoulder base plate. In use, first fix the support frame 1 to the treatment bed or the head, neck, and shoulder base plate. Then, place the lower positioning film 2 in a 65-70℃ constant temperature water bath. After the lower thermoplastic film 22 softens, remove it, dry it with a towel or paper towel, and then fix it above the support frame 1. Have the patient lie supine, place the head, neck, and shoulders in the appropriate position of the lower thermoplastic film 22 and press down. Use your hands or special tools to gently press the thermoplastic film on the head, shoulders, etc., to make it conform to the patient's body contour (or, a sponge pad can be placed under the lower thermoplastic film 22, the shape of which matches the contour of the human neck and shoulders, to assist the lower thermoplastic film 22 in conforming to the patient). (Apply to the body surface), and completely wrap and support the patient's posterior surface; wait until the lower thermoplastic film 22 has completely cooled and solidified; place the upper positioning film 3 in a 65-70℃ constant temperature water bath, and remove it after the upper thermoplastic film 32 has softened, and dry it with a dry towel or paper towel; cover the patient's anterior surface with the upper thermoplastic film 32, and at the same time pull down the upper frame 31 to fix it to the support frame 1 and / or the lower frame 21; use your hand or special tools to gently press the thermoplastic film on the forehead, bridge of the nose, nostrils, lips, jaw, external auditory canal, head, shoulders, etc., to make it conform to the patient's body surface contour, and then wait until the upper thermoplastic film 32 has completely cooled and solidified.

[0047] This embodiment of the radiotherapy positioning device with a double-layer membrane uses a lower positioning membrane 2 instead of a traditional foaming agent to position the patient's back. The lower thermoplastic membrane 22 does not require material mixing or spreading during the shaping process, making the operation relatively simple. The lower thermoplastic membrane 22 has a short curing time, so the patient does not need to maintain one posture for a long time, reducing the patient's discomfort. The lower thermoplastic membrane 22 has no odor during shaping and curing, and it is provided with ventilation holes to facilitate heat dissipation, thereby avoiding discomfort to the patient, improving the patient's cooperation during radiotherapy, and thus helping to ensure the treatment effect and patient comfort.

[0048] The radiotherapy positioning device with a double membrane in this embodiment further includes an installation structure, which includes a first fixing hole 111, a second fixing hole 211, a third fixing hole 311, and fixing pins 112. Multiple first fixing holes 111 are provided on the top of the support frame 1 and are spaced apart along the extending direction of the support frame 1. Multiple second fixing holes 211 are provided on the lower frame 21 and correspond to the first fixing holes 111 respectively. Multiple third fixing holes 311 are provided on the upper frame 31 and correspond to the first fixing holes 111 respectively. Multiple fixing pins 112 are adapted to pass through the corresponding second fixing holes 211 and third fixing holes 311 and then be fixedly connected to the corresponding first fixing hole 111.

[0049] The radiotherapy positioning device with a double membrane in this embodiment, further, as... Figure 4 As shown, the first shaping hole 220 and / or the second shaping hole 320 are both hexagonal honeycomb-shaped.

[0050] In this embodiment, the radiotherapy positioning device with a double membrane further comprises a shape in which the edges surrounding the first shaping hole 220 and / or the second shaping hole 320 are thicker in the middle and thinner at both ends.

[0051] In this embodiment, during the shaping process, the edges of the lower thermoplastic film 22 and / or the upper thermoplastic film 32 that form the first shaping hole 220 and / or the second shaping hole 320 will be stretched and deformed, resulting in the stretched edges becoming thinner. By setting the edges that form the first shaping hole 220 and / or the second shaping hole 320 to be thicker in the middle, the stretched area can be compensated during stretching, so that it does not become too thin after stretching, thereby affecting the strength after deformation.

[0052] The radiotherapy positioning device with a double membrane in this embodiment, such as Figure 5 As shown, the upper thermoplastic film 32 has an opening 321 at the position corresponding to the nose of a human face.

[0053] In this embodiment, the avoidance opening 321 can prevent the patient's nose and mouth from being compressed. On the one hand, it can reduce the patient's discomfort, and on the other hand, it can prevent the mouth and nose from frequently and closely contacting the upper thermoplastic film 32 during multiple radiotherapy sessions, which would lead to hygiene problems.

[0054] The radiotherapy positioning device with a double membrane in this embodiment, such as Figure 5 As shown, an operating handle 312 is provided on the outer wall of the upper frame 31. The operating handle 312 makes it more convenient to pick up and put down the upper positioning film 3.

[0055] The radiotherapy positioning device with a double membrane in this embodiment, such as Figure 3 , Figure 5As shown, a positioning structure is also provided between the upper frame 31 and the lower frame 21. The positioning structure includes a positioning post 313 and / or a positioning hole 213 provided on the upper frame 31, and a positioning hole 213 and / or a positioning post 313 provided on the lower frame 21; the positioning hole 213 and the positioning post 313 can be inserted and engaged.

[0056] In this embodiment, the positioning device can achieve rapid positioning between the upper frame 31 and the lower frame 21 when the upper frame 31 is fixedly connected to the support frame 1 and / or the lower frame 21.

[0057] The radiotherapy positioning device with a double membrane in this embodiment, such as Figure 2 As shown, the support frame 1 includes an upper support bar 11 and a lower support bar 12 arranged opposite each other, and a plurality of middle support rods 13 connecting the upper support bar 11 and the lower support bar 12. A first fixing hole 111 is formed on the upper support bar 11.

[0058] In this embodiment of the radiotherapy positioning device with a double membrane, the lower support bar 12 is provided with a plurality of bottom fixing holes 120 at intervals, and the bottom fixing holes 120 correspond to the insertion holes on the head, neck and shoulder base plate respectively.

[0059] In this embodiment, in the prior art, the positioning membrane used on the patient's chest generally needs to be fixedly connected to the head, neck, and shoulder base plate. The connection method typically involves using pins that pass through holes on the positioning membrane's frame and the head, neck, and shoulder base plate to secure them. To reduce usage costs, in this embodiment, bottom fixing holes 120 corresponding to the holes on the head, neck, and shoulder base plate can be opened on the lower support strip 12. This allows for direct use of pins to fix the support frame 1 of this embodiment to the existing head, neck, and shoulder base plate, thereby reducing usage costs. Alternatively, a head, neck, and shoulder base plate matching the support frame 1 of this embodiment can be customized according to actual usage needs. The fixing method can refer to existing fixing methods, which will not be elaborated further in this application.

[0060] In this embodiment of the radiotherapy positioning device with double membranes, the upper thermoplastic membrane 32 and the lower thermoplastic membrane 22 are the same type of thermoplastic membrane.

[0061] This embodiment features a radiotherapy positioning device with a double-layer membrane, combined with Figure 8-11 Its working process is as follows:

[0062] Align the bottom fixing hole 120 on the lower support bar 12 with the insertion hole on the head, neck and shoulder base plate, and then use the pin to fix the two together so that the support frame 1 is firmly fixed on the head, neck and shoulder base plate.

[0063] Place the sponge pad on the head, neck and shoulder base plate, place the lower positioning film 2 in a 65-70℃ constant temperature water bath, and remove it after the lower thermoplastic film 22 has softened. Use a dry towel or paper towel to absorb the moisture, align the second fixing hole 211 on the lower frame 21 with the first fixing hole 111 on the upper support strip 11, and fix it with the fixing pin 112.

[0064] Lay the patient supine, place the head, neck and shoulders in the appropriate position of the lower thermoplastic film 22 and press down. Use your hands or special tools to gently press the thermoplastic film on the shoulders, neck and other areas to make it conform to the patient's body contour and completely wrap and support the patient's back surface; wait until the lower thermoplastic film 22 has completely cooled and solidified.

[0065] Place the upper positioning film 3 into a constant temperature water bath at 65-70℃. After the upper thermoplastic film 32 softens, remove it and dry it with a dry towel or paper towel. Cover the patient's front surface with the upper thermoplastic film 32 and pull down the upper frame 31. Pull out the fixing pin 112 on the lower frame 21 so that the positioning post 313 and / or positioning hole 213 on the upper frame 31 can be inserted and engaged with the positioning hole 213 and / or positioning post 313 on the lower frame 21. Then, use the fixing pin 112 to pass through the corresponding second fixing hole 211 and third fixing hole 311 respectively and fix it to the corresponding first fixing hole 111.

[0066] Use your hands or a special tool to gently press the thermoplastic film on the forehead, bridge of the nose, nostrils, lips, jaw, external auditory canal, head, and shoulders to conform to the patient's body contours, and then wait until the upper thermoplastic film 32 has completely cooled and solidified.

[0067] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this innovative technical solution.

Claims

1. A radiotherapy positioning device having a double layer film, characterised in that, The utility model relates to a kind of positioning film installation structure, including: Support frame (1) with a certain height; Lower positioning film (2) is installed above the support frame (1) in cover, including lower edge frame (21) and lower thermoplastic film (22) fixedly installed on the lower edge frame (21);The lower edge frame (21) is detachably connected with the support frame (1);The lower thermoplastic film (22) is provided with a plurality of first plastic holes (220); Upper positioning film (3) is installed above the lower positioning film (2) in cover, including upper edge frame (31) and upper thermoplastic film (32) fixedly installed on the upper edge frame (31);The upper edge frame (31) is detachably connected with the support frame (1) and / or lower edge frame (21);The upper thermoplastic film (32) is provided with a plurality of second plastic holes (320).

2. The radiotherapy positioning device having a double membrane according to claim 1, characterized in that, It further includes mounting structure, and the mounting structure includes: First fixed hole (111), multiple, is opened in the top of the support frame (1), and is interval setting along the extension direction of the support frame (1); Second fixed hole (211), multiple, is opened on the lower edge frame (21), and is respectively corresponding with the first fixed hole (111); Third fixed hole (311), multiple, is opened on the upper edge frame (31), and is respectively corresponding with the first fixed hole (111); Fixed bolt (112), multiple, is suitable for respectively after passing through corresponding second fixed hole (211) and third fixed hole (311) with corresponding first fixed hole (111) fixed connection.

3. The radiotherapy positioning device having a double membrane according to claim 1, characterized in that, The shape of the first plastic hole (220) and / or the second plastic hole (320) is hexagonal honeycomb.

4. The radiotherapy positioning device having a double membrane according to claim 3, characterized in that, The edge of the first plastic hole (220) and / or the second plastic hole (320) is thick in the middle and thin at both ends.

5. The radiotherapy positioning device having a double membrane according to claim 4, characterized in that, The upper thermoplastic film (32) is provided with a avoiding port (321) at the position corresponding to human face nose.

6. The radiotherapy positioning device having a double membrane according to claim 1, characterized in that, The outer side wall of the upper edge frame (31) is provided with operating handle (312).

7. The radiotherapy positioning device having a double membrane according to claim 1, characterized in that, The upper edge frame (31) and the lower edge frame (21) are further provided with positioning structure, and the positioning structure includes positioning column (313) and / or positioning hole (213) arranged on the upper edge frame (31), and positioning hole (213) and / or positioning column (313) arranged on the lower edge frame (21);The positioning hole (213) and the positioning column (313) can be inserted and matched.

8. The radiotherapy positioning device having a double membrane according to claim 2, characterized in that, The support frame (1) includes upper and lower positioning film (3) and lower positioning film (2) and a plurality of middle support rods (13) connected between the upper support bar (11) and the lower support bar (12) arranged oppositely.

9. The radiotherapy positioning device having a double membrane according to claim 8, characterized in that, The lower support bar (12) is interval provided with a plurality of bottom fixed holes (120).

10. The radiotherapy positioning device having a double membrane according to any one of claims 1-9, characterized in that, The upper thermoplastic film (32) and the lower thermoplastic film (22) are the same kind of thermoplastic film.

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