Heating bed board for radiotherapy

Abstract

The utility model relates to the technical field of radiotherapy, in particular to a heating bed board for radiotherapy, which comprises a first fiber layer, a non-metal heating structure layer, a foam board and a second fiber layer which are adhered and laid from top to bottom, and the non-metal heating structure layer is connected with a first metal electrode and a second metal electrode. The first metal electrode and the second metal electrode are arranged on the same side of the foam plate and are arranged in a non-treatment area. Current is led into the non-metal heating structure layer through the first metal electrode and the second metal electrode, so that the non-metal heating structure layer emits heat, the heating bed plate for radiotherapy is heated, the heating temperature can be controlled by controlling the size of the led-in current, and therefore effective control over the temperature is achieved, the somatosensory comfort degree of a patient during treatment is improved, and the radiotherapy effect is improved. And adverse effects on radiotherapy precision caused by movement of the body due to discomfort of the patient are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of radiotherapy, and more specifically, to a heating bed board for radiotherapy. Background Art

[0002] During the radiotherapy process of cancer, the patient needs to lie on a bottom board, and then the patient is positioned and fixed based on this bottom board. At present, the bottom board used in the treatment process does not have a heating function or a constant temperature function. In a treatment room at about 20 °C, the patient lies on the cold bottom board, and during the treatment process, the patient will involuntarily tremble and move the body due to cold, thus affecting the positioning accuracy and ultimately affecting the accuracy of radiotherapy. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a heating bed board for radiotherapy, which can effectively control the temperature, improve the physical comfort of the patient during treatment, and avoid the adverse impact on the radiotherapy accuracy caused by the patient moving the body due to discomfort.

[0004] To solve the above technical problems, the technical solution adopted by the utility model is:

[0005] Provide a heating bed board for radiotherapy, including a first fiber layer, a non-metal heating structure layer, a foam board and a second fiber layer adhesively laid from top to bottom. The non-metal heating structure layer is connected with a first metal electrode and a second metal electrode, and the first metal electrode and the second metal electrode are arranged on the same side of the foam board and in the non-treatment area.

[0006] For the heating bed board for radiotherapy of the utility model, the first fiber layer, the non-metal heating structure layer, the foam board and the second fiber layer are all non-metal structures, which can effectively ensure that the heating bed board for radiotherapy meets the requirements of penetrating rays; at the same time, the utility model introduces current into the non-metal heating structure layer through the first metal electrode and the second metal electrode, so that the non-metal heating structure layer generates heat, and the heating bed board for radiotherapy heats up. By controlling the magnitude of the introduced current, the heating temperature can be controlled, so as to effectively control the temperature, improve the physical comfort of the patient during treatment, and avoid the adverse impact on the radiotherapy accuracy caused by the patient moving the body due to discomfort.

[0007] Furthermore, the first fiber layer includes several layers of first carbon fiber cloths, and several layers of first carbon fiber cloths are composite molded; the second fiber layer includes several layers of second carbon fiber cloths, and several layers of second carbon fiber cloths are composite molded. The multi-layers of first carbon fiber cloths and multi-layers of second carbon fiber cloths are used to strengthen the strength of the heating bed board for radiotherapy, and the number of layers of the first carbon fiber cloths and the second carbon fiber cloths can be increased or decreased according to the actual application scenario.

[0008] Further, the first carbon fiber cloth is in three layers, and the three layers of the first carbon fiber cloth are bonded by epoxy resin; the second carbon fiber cloth is in three layers, and the three layers of the second carbon fiber cloth are bonded by epoxy resin.

[0009] Further, the non-metallic heating structure layer includes a first insulating layer, a graphene conductive layer, and a second insulating layer arranged from top to bottom, and the graphene conductive layer is printed on the first insulating layer or printed on the second insulating layer. In the present utility model, the surfaces of the first carbon fiber cloth and the foam board can be used as the insulating layers on the upper and lower surfaces of the conductive layer, or the first insulating layer and the second insulating layer can be separately provided as the insulating layers on the upper and lower surfaces of the conductive layer.

[0010] Further, the graphene conductive layer includes a plurality of conductive units, each conductive unit is connected with a first metal electrode and a second metal electrode, and the plurality of conductive units are connected in parallel. The parallel connection of each conductive unit controls the heating of each heating area, which is beneficial to the accurate control of the temperature of each heating area.

[0011] Further, the conductive unit includes a first conductive film, a second conductive film, and a third conductive film which are electrically connected. The first conductive film and the third conductive film are arranged in parallel with equal width, the second conductive film is arranged between the first conductive film and the third conductive film, the first metal electrode is connected to the first conductive film, and the second metal electrode is connected to the third conductive film. The whole conductive unit is a U-shaped structure, which is convenient for arranging the first metal electrode and the second metal electrode in the non-treatment area on the same side of the bed board, and avoids affecting the penetration of rays.

[0012] Further, the radiotherapy heating bed board includes a plurality of heating areas corresponding to the positions of the conductive units, and each heating area is provided with a temperature sensor. The temperature sensor and the conductive unit are both connected to a controller. The zoning temperature control of the bed board can ensure the uniformity of the temperature distribution on the bed board, thereby further improving the body feeling comfort of the patient during treatment.

[0013] Further, the lengths of the first conductive film and the third conductive film are both L: where U represents the rated voltage, ρ represents the resistivity, d represents the thickness of a single-layer graphene conductive layer, n represents the number of layers of the graphene conductive layer, and P 均 represents the heating power per square meter of the graphene conductive layer and P 均 ≥220W; the aspect ratio of the length to the width of the first conductive film and the third conductive film is: where I represents the energized current and I≥2A, and W represents the width of the first conductive film and the third conductive film. The above restrictions on the lengths and widths of the first conductive film and the third conductive film provide effective guidance for the design of the graphene conductive layer.

[0014] Further, a plurality of positioning holes are provided in the heating bedplate for radiotherapy, and the positioning holes are evenly distributed in a row and multiple columns on the first conductive film and the third conductive film. The positioning holes are used to position and fix the patient. The positioning holes are through holes that penetrate the first fiber layer, the non-metallic heating structure layer, the foam board, and the second fiber layer.

[0015] Further, the aspect ratios of the length and width of the first conductive film and the third conductive film satisfy the following conditions: where U represents the rated voltage, d represents the thickness of a single-layer graphene conductive layer, n represents the number of graphene conductive layers, ρ represents the resistivity, and P 理 represents the theoretical heating power of the graphene conductive layer, L1 is the length of the first conductive film, L2 is the length of the third conductive film, W is the width of the first conductive film and the third conductive film, and D is the size of the positioning hole in the width direction of the heating bedplate. Making the above restrictions on the length and width of the first conductive film and the third conductive film provides effective guidance for the design of the graphene conductive layer.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] For the heating bedplate for radiotherapy of the present utility model, an electric current is introduced into the non-metallic heating structure layer through the first metal electrode and the second metal electrode, so that the non-metallic heating structure layer generates heat, causing the heating bedplate for radiotherapy to heat up. By controlling the magnitude of the introduced current, the heating temperature can be controlled, thereby effectively controlling the temperature, improving the body sensation comfort of the patient during treatment, and avoiding the adverse impact on the radiotherapy accuracy caused by the patient moving the body due to discomfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the heating bedplate for radiotherapy;

[0019] Figure 2 is a schematic diagram of each conductive unit arranged in series;

[0020] Figure 3 is a schematic diagram of the non-metallic heating structure layer in Embodiment 3;

[0021] Figure 4 is a schematic diagram of the non-metallic heating structure layer in Embodiment 4;

[0022] In the drawings: 100, first fiber layer; 110, first carbon fiber cloth; 200, non-metallic heating structure layer; 210, first insulating layer; 220, graphene conductive layer; 221, first conductive film; 222, second conductive film; 223, third conductive film; 230, second insulating layer; 300, foam board; 400, second fiber layer; 410, second carbon fiber cloth; 500, first metal electrode; 600, second metal electrode; 700, positioning hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The present utility model will be further described below in conjunction with specific embodiments. Among them, the attached drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation on this patent; in order to better illustrate the embodiments of the present utility model, some components in the attached drawings will be omitted, enlarged or reduced, which does not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the attached drawings may be omitted.

[0024] In the attached drawings of the embodiments of the present utility model, the same or similar reference numerals correspond to the same or similar components; in the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the attached drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the attached drawings are only for illustrative purposes and should not be construed as a limitation on this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0025] Embodiment 1

[0026] As Figure 1 shown in the first embodiment of the heating bedplate for radiotherapy of the present utility model, it includes a first fiber layer 100, a non-metallic heating structure layer 200, a foam board 300, and a second fiber layer 400 that are adhesively laid from top to bottom. The non-metallic heating structure layer 200 is connected to a first metal electrode 500 and a second metal electrode 600. The first metal electrode 500 and the second metal electrode 600 are disposed on the same side of the foam board 300 and in the non-treatment area.

[0027] The heating bedplate for radiotherapy in this embodiment is divided into a treatment area and a non-treatment area along the length direction: the treatment area needs to penetrate rays and needs to be heated, and there cannot be high-density materials such as metal in the treatment area, because high-density materials such as metal will affect the penetration of rays. The non-metallic heating structure layer 200 is fully distributed in the treatment area to achieve heating of the treatment area; the non-treatment area does not need to be heated and can also have high-density materials such as metal. Therefore, the first metal electrode 500 and the second metal electrode 600 can be distributed in the non-treatment area. The non-treatment area is located at the edge of the heating bedplate, which is also convenient for connecting the first metal electrode 500 and the second metal electrode 600 to external wires.

[0028] In this embodiment, the foam board 300 serves as the base board of the bed board and plays a major supporting role. The polymethacrylimide foam board 300 is selected. The polymethacrylimide foam board 300 has high strength and is a lightweight, closed-cell rigid foam plastic. The first fiber layer 100 includes several layers of first carbon fiber cloths 110, and several layers of first carbon fiber cloths 110 are composite molded; the second fiber layer 400 includes several layers of second carbon fiber cloths 410, and several layers of second carbon fiber cloths 410 are composite molded. The multiple layers of first carbon fiber cloths 110 and multiple layers of second carbon fiber cloths 410 are used to strengthen the strength of the heating bed board for radiotherapy. The number of layers of the first carbon fiber cloth 110 and the second carbon fiber cloth 410 can be increased or decreased according to the actual application scenario. In this embodiment, the first carbon fiber cloth 110 has three layers, and the three layers of first carbon fiber cloths 110 are adhered by epoxy resin; the second carbon fiber cloth 410 has three layers, and the three layers of second carbon fiber cloths 410 are adhered by epoxy resin. It should be noted that in addition to carbon fiber, the first carbon fiber cloth 110 and the second carbon fiber cloth 410 in the present utility model can also be made of glass fiber or Kevlar fiber.

[0029] The non-metal heating structure layer 200 includes a first insulating layer 210, a graphene conductive layer 220, and a second insulating layer 230 arranged from top to bottom. The graphene conductive layer 220 is printed on the first insulating layer 210 or printed on the second insulating layer 230. It should be noted that the setting of the first insulating layer 210 and the second insulating layer 230 is for the purpose of realizing the energized heating of the graphene conductive layer 220 and for facilitating the forming of the graphene conductive layer 220, and is not a limitation of the present utility model. In addition to separately setting the first insulating layer 210 and the second insulating layer 230, the present utility model can also use the surfaces of the first carbon fiber cloth 110 and the foam board 300 as the insulating layers on the upper and lower surfaces of the conductive layer.

[0030] In this embodiment, the graphene conductive layer 220 includes several conductive units. Taking two bends to form a U shape as one conductive unit, the several conductive units of the present utility model can be connected in series or in parallel. When several conductive units are connected in series end to end, only the first conductive unit needs to be connected to the first metal electrode 500, and the last conductive unit needs to be connected to the second metal electrode 600, so as to simplify the connection between the graphene conductive layer 220 and the peripheral power supply or circuit, as Figure 2 shown.

[0031] When this embodiment is implemented, the first fiber layer 100, the non-metal heating structure layer 200, the foam board 300, and the second fiber layer 400 are all non-metal structures, which can effectively ensure that the heating bed board for radiotherapy meets the requirements of penetrating rays. At the same time, in this utility model, an electric current is introduced into the non-metal heating structure layer 200 through the first metal electrode 500 and the second metal electrode 600, so that the non-metal heating structure layer 200 generates heat, causing the heating bed board for radiotherapy to increase in temperature. By controlling the magnitude of the introduced electric current, the heating temperature can be controlled, thereby effectively controlling the temperature, improving the body sensation comfort of the patient during treatment, and avoiding adverse effects on the radiotherapy accuracy caused by the patient moving the body due to discomfort.

[0032] Embodiment Two

[0033] This embodiment is the second embodiment of the heating bed board for radiotherapy of this utility model. This embodiment is similar to Embodiment One, the difference being that the graphene conductive layer 220 includes a plurality of conductive units, each conductive unit is connected to the first metal electrode 500 and the second metal electrode 600, and the plurality of conductive units are connected in parallel. Each conductive unit is connected in parallel, and each conductive unit is connected to the first metal electrode 500 and the second metal electrode 600. Each conductive unit is controlled separately without interference, controlling the heating of each heating area, which is conducive to the accurate control of the temperature of each heating area, so as to achieve the rapid heating and uniform heating of the heating bed board, and to achieve the uniform heating and constant temperature of the overall heating bed board.

[0034] The conductive unit includes a first conductive film 221, a second conductive film 222, and a third conductive film 223 that are electrically connected. The first conductive film 221 and the third conductive film 223 are arranged in parallel with equal width, the second conductive film 222 is arranged between the first conductive film 221 and the third conductive film 223, the first metal electrode 500 is connected to the first conductive film 221, and the second metal electrode 600 is connected to the third conductive film 223. The entire conductive unit is a U-shaped structure, which is convenient for the first metal electrode 500 and the second metal electrode 600 to be arranged in the non-treatment area on the same side of the bed board, avoiding affecting the ray penetration.

[0035] The heating bed board for radiotherapy includes a plurality of heating areas corresponding to the positions of the conductive units, and each heating area is provided with a temperature sensor. The temperature sensor and the conductive unit are both connected to a controller. By controlling the temperature of each area of the bed board, the uniformity of the temperature distribution on the bed board can be ensured, thereby further improving the body sensation comfort of the patient during treatment.

[0036] Compared with Embodiment One, in this embodiment, the heating bed board is divided into multiple heating areas, and a conductive unit is arranged in each heating area. Each conductive unit is connected in parallel, and the temperature of each area of the bed board is controlled, which can ensure the uniformity of the temperature distribution on the bed board, thereby further improving the body sensation comfort of the patient during treatment.

[0037] Embodiment III

[0038] This embodiment is the third embodiment of the heating bedplate for radiotherapy of the present utility model. This embodiment is similar to Embodiment I, except that in this embodiment, the graphene conductive layer 220 includes one conductive unit. The graphene conductive layer 220 includes a first conductive film 221, a second conductive film 222, and a third conductive film 223 that are electrically connected. The first conductive film 221 and the third conductive film 223 are arranged in parallel with equal width. The second conductive film 222 is disposed between the first conductive film 221 and the third conductive film 223. The first metal electrode 500 is connected to the first conductive film 221, and the second metal electrode 600 is connected to the third conductive film 223. The first conductive film 221 and the second conductive film 222 are arranged with equal length, as Figure 3 shown.

[0039] The lengths of the first conductive film 221 and the third conductive film 223 are both L: Where U represents the rated voltage, U = 24V, ρ represents the resistivity, d represents the thickness of the single-layer graphene conductive layer 220, n represents the number of layers of the graphene conductive layer 220, and P 均 represents the heating power per square meter of the graphene conductive layer 220 and P 均 ≥220W; The aspect ratio of the first conductive film 221 and the third conductive film 223 is: Where I represents the energized current, and I≥2A, and W represents the widths of the first conductive film 221 and the third conductive film 223.

[0040] Specifically, in this embodiment, the resistivity ρ of the graphene conductive layer 220 used is 4.5×10 -5 Ωm, and the thickness of the single-layer film is d = 7×10 -5 m, then the sheet resistance of the graphene conductive layer 220 is (where n is the number of graphene layers, and n≥1).

[0041] The width of the heating bedplate used in clinical practice is generally 0.53m, and the widths W of the first conductive film 221 and the third conductive film 223 are ≤0.2m. In addition, to meet the heating requirements, the heating power P per square meter of the first conductive film 221 and the third conductive film 223 均 ≥220W, and the current I≥2A.

[0042] Heating power per square meter: Simplified to get:

[0043] Energized current: Simplified to get:

[0044] Therefore, the widths and lengths of the first conductive film 221 and the third conductive film 223 of the present utility model need to meet the following conditions:

[0045] For a single-layer graphene heating film with W ≤ 0.2 m, its maximum length L ≤ 1.01 m.

[0046] For a two-layer graphene heating film with W ≤ 0.2 m, its maximum length L ≤ 1.43 m.

[0047] For a three-layer graphene heating film with W ≤ 0.2 m, its maximum length L ≤ 1.75 m.

[0048] The above size requirements for the graphene conductive layer 220 provide effective guidance for the design of the graphene conductive layer 220.

[0049] Example 4

[0050] This example is the fourth example of the heating bedplate for radiotherapy of the present utility model. This example is similar to Example 1, except that a plurality of positioning holes 700 are provided in the heating bedplate for radiotherapy. The positioning holes 700 are evenly distributed in a row and multiple columns on the first conductive film 221 and the third conductive film 223. The positioning holes 700 are used to position and fix the patient. The positioning holes 700 are through holes that penetrate the first fiber layer 100, the non-metallic heating structure layer 200, the foam board 300, and the second fiber layer 400, and the numbers on the first conductive film 221 and the third conductive film 223 are equal and the positions correspond to each other, as Figure 4 shown. For the convenience of arranging the first metal electrode 500 and the second metal electrode 600, the lengths of the first conductive film 221 and the third conductive film 223 in this example are not equal. The length of the first conductive film 221 is L1, and the length of the second conductive film 222 is L2.

[0051] The aspect ratio requirements for the first conductive film 221 and the third conductive film 223 are: Among them, U represents the rated voltage, d represents the thickness of the single-layer graphene conductive layer 220, n represents the number of layers of the graphene conductive layer 220, ρ represents the resistivity, and P 理 represents the theoretical heating power of the graphene conductive layer 220, L1 is the length of the first conductive film 221, L2 is the length of the third conductive film 223, W is the width of the first conductive film 221 and the third conductive film 223, and D is the size of the positioning hole 700 in the width direction of the heating bedplate. To meet the requirements of the heating power, the above restrictions are imposed on the lengths and widths of the first conductive film 221 and the third conductive film 223.

[0052] In this embodiment, U = 24V, and the resistivity ρ of the graphene conductive layer 220 used is ρ = 4.5×10 -5 Ωm, and the thickness of the single-layer film is d = 7×10 -5 m, and the aspect ratio requirements of the first conductive film 221 and the third conductive film 223 are: 理 ≥A

[0053] That is

[0054] The above size requirements of the graphene conductive layer 220 provide effective guidance for the design of the graphene conductive layer 220.

[0055] In the specific content of the above specific implementation manner, each technical feature can be combined arbitrarily without contradiction. For the sake of brevity of description, not all possible combinations of the above technical features are described. However, as long as the combinations of these technical features do not conflict, they should all be considered as the scope described in this specification.

[0056] Obviously, the above embodiments of the present invention are merely examples given to clearly illustrate the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A heating bedplate for radiotherapy, characterized in that, It includes a first fiber layer (100) laid by top-down bonding, a non-metallic heating structure layer (200), a foam board (300), and a second fiber layer (400). The non-metallic heating structure layer (200) is connected with a first metal electrode (500) and a second metal electrode. The first metal electrode (500) and the second metal electrode are arranged on the same side of the foam board (300) and in a non-treatment area.

2. The heating bedplate for radiotherapy according to claim 1, wherein, The first fiber layer (100) includes several layers of first carbon fiber cloth (110), and several layers of first carbon fiber cloth (110) are compounded and molded; the second fiber layer (400) includes several layers of second carbon fiber cloth (410), and several layers of second carbon fiber cloth (410) are compounded and molded.

3. The heating bedplate for radiotherapy according to claim 2, wherein The first carbon fiber cloth (110) has three layers, and the three layers of first carbon fiber cloth (110) are bonded by epoxy resin; the second carbon fiber cloth (410) has three layers, and the three layers of second carbon fiber cloth (410) are bonded by epoxy resin.

4. The heating bed board for radiotherapy according to any one of claims 1 to 3, characterized in that, The non-metallic heating structure layer (200) includes a first insulating layer (210), a graphene conductive layer (220), and a second insulating layer (230) arranged from top to bottom. The graphene conductive layer (220) is printed on the first insulating layer (210) or printed on the second insulating layer (230).

5. The heating bedplate for radiotherapy according to claim 4, characterized in that, The graphene conductive layer (220) includes several conductive units. Each conductive unit is connected with a first metal electrode (500) and a second metal electrode, and several conductive units are connected in parallel.

6. The heating bedplate for radiotherapy according to claim 5, characterized in that, The conductive unit includes a first conductive film (221), a second conductive film (222), and a third conductive film (223) which are electrically connected. The first conductive film (221) and the third conductive film (223) are arranged in parallel with equal width. The second conductive film (222) is arranged between the first conductive film (221) and the third conductive film (223). The first metal electrode (500) is connected to the first conductive film (221), and the second metal electrode is connected to the third conductive film (223).

7. The heating bedplate for radiotherapy according to claim 5, wherein The heating bed board for radiotherapy includes several heating areas corresponding to the positions of the conductive units. Each heating area is provided with a temperature sensor, and the temperature sensor and the conductive unit are both connected to a controller.

8. The heating bed board for radiotherapy according to claim 6, characterized in that, The lengths of the first conductive film (221) and the third conductive film (223) are both L: Wherein, U represents the rated voltage, ρ represents the resistivity, d represents the thickness of the single-layer graphene conductive layer (220), n represents the number of layers of the graphene conductive layer (220), and P represents the heating power per square meter of the graphene conductive layer (220) and P ≥ 220 W; the aspect ratios of the first conductive film (221) and the third conductive film (223) are: Wherein, I represents the energized current and I ≥ 2 A, and W represents the widths of the first conductive film (221) and the third conductive film (223).

9. The heating bedplate for radiotherapy according to claim 6, characterized in that, The heating bed board for radiotherapy is provided with several positioning holes (700), and the positioning holes (700) are evenly distributed in a row and multiple columns on the first conductive film (221) and the third conductive film (223).

10. The heating bedplate for radiotherapy according to claim 9, characterized in that, The aspect ratios of the first conductive film (221) and the third conductive film (223) satisfy the following conditions: Where U represents the rated voltage, d represents the thickness of the single-layer graphene conductive layer (220), n represents the number of layers of the graphene conductive layer (220), ρ represents the resistivity, Ptheory represents the theoretical heating power of the graphene conductive layer (220), L1 is the length of the first conductive film (221), L2 is the length of the third conductive film (223), W is the width of the first conductive film (221) and the third conductive film (223), and D is the dimension of the positioning hole (700) in the width direction of the heating bedplate.

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