Composite layered structure, preparation method thereof and bed board structure of treatment bed

Abstract

The invention discloses a composite layered structure, a preparation method thereof and a bed board structure of a treatment couch, the composite layered structure comprises an adjusting layer, the adjusting layer comprises a first framework, the first framework is provided with a plurality of first gaps, and thermoplastic materials are arranged on the periphery of the first framework and in the first gaps; a plurality of filiform resistors are uniformly distributed in the adjusting layer, and each filiform resistor is in uniform contact with the thermoplastic material; each wire resistor is used for being electrically connected with an external power supply, when the external power supply is powered on, the wire resistors can heat, the temperature value of the thermoplastic material is increased to be greater than or equal to the deformation temperature value, the thermoplastic material enters a plastic state, and when the external power supply is powered off, the wire resistors stop heating; the bed board can be applied to a treatment bed, and the technical problems that in the prior art, a bed board of a treatment bed is a hard bed board and cannot be attached to the body shape of a patient, the patient feels uncomfortable after lying for a long time, subconscious movement is likely to be generated in the treatment process, and treatment deviation occurs are solved.

Description

Technical Field

[0001] The present invention relates to the field of treatment beds, and particularly to a composite layered structure, a preparation method thereof, and a bed board structure of a treatment bed. Background Art

[0002] In current medical treatments, some treatments require patients to receive treatment in a long-term lying and fixed position. Before treatment, patients need to be fixed and supported to ensure that they remain stationary during treatment and avoid deviation of the treatment position, which may affect the accuracy of the treatment target. Taking radiotherapy as an example, patients need to be initially positioned on the treatment bed in the preparation room and supported and fixed according to the planned position. Then, the above treatment bed is moved to the target position in the treatment room. After fixing the position of the treatment bed, radiotherapy is performed on the patient. The duration of a single radiotherapy process is approximately 45 minutes to 1 hour, and patients need to maintain a fixed position for a long time during the entire radiotherapy process to ensure the position accuracy of the radiation source received by the patient and avoid harm to the patient's normal somatic cells.

[0003] In the prior art, the most common method is to use a rigid treatment bed board for fixation and positioning (such as Figure 1 ). The treatment bed board has the characteristics of high strength. With the fixation methods such as a body mold, a headrest, and straps, the position of the patient on the bed board surface will not change, thereby ensuring that the target treatment position on the patient's body will not change during treatment. Its defects are as follows: First, in order to achieve the universality of fixing patients, the bed board surface is very hard and flat. The rigid bed board cannot automatically fit according to the patient's body shape. Even with other fixation methods, due to the long-term lying of patients, discomfort will occur, especially for patients with a thin body shape or a special body shape, such as scoliosis. Patients will still subconsciously change their postures, and during treatment, the target position of treatment needs to be calibrated and adjusted repeatedly, which not only reduces the treatment efficiency and prolongs the treatment time, but also may result in treatment deviation. Second, local compression causes discomfort or even pressure point injury. Since the bed board is a rigid structure, the contact pressure between the patient's body surface and the bed board surface is uneven, which may cause discomfort or even pressure sores at local compression points (such as the shoulders and waist). Third, it cannot dynamically adjust its shape. The rigid mechanism can only make patients passively adapt to the bed board and cannot adjust the shape of the bed board or improve the comfort during treatment or before treatment.

[0004] Therefore, it is necessary to improve the structure of the treatment bed board during the treatment process in a long-term lying position to be able to assist in fixing the patient's position and improve the comfort of the patient during treatment. Summary of the Invention

[0005] The object of the present invention is to provide a composite layered structure, a preparation method thereof, and a bed board structure of a treatment bed, so as to solve the technical problem in the prior art that during the treatment process where a patient needs to lie in a fixed position for a long time, the bed board of the treatment bed is a hard bed board and cannot fit well with the patient's body shape. Although other auxiliary fixing measures are adopted, due to the discomfort caused by the patient lying for a long time, the patient is still prone to involuntary movement during the treatment process, resulting in treatment deviation.

[0006] To solve the above technical problems, the present invention adopts the following technical solutions:

[0007] In the first aspect, the present invention provides a composite layered structure for adapting to the patient's body shape and providing support, including an adjustment layer;

[0008] The adjustment layer includes a first skeleton, the first skeleton has a plurality of first voids, and a thermoplastic material is provided both on the outer periphery of the first skeleton and in each of the first voids;

[0009] A plurality of filamentous resistors are evenly distributed in the adjustment layer, and each of the filamentous resistors is in uniform contact with the thermoplastic material; each of the filamentous resistors is respectively used for being electrically connected to an external power supply. When the external power supply is energized, the filamentous resistor can generate heat, the temperature value of the thermoplastic material rises to be greater than or equal to the deformation temperature value, and the thermoplastic material enters the plastic state. When the external power supply is powered off, the filamentous resistor stops generating heat, the temperature value of the thermoplastic material drops to be less than the deformation temperature value, and the thermoplastic material enters the shaping state.

[0010] When this technical solution is applied to a treatment bed where a patient needs to lie in a fixed position for a long time, it can solve the technical problem in the prior art that the bed board of the treatment bed is a hard bed board and cannot fit well with the patient's body shape. Although other auxiliary fixing measures are adopted, due to the discomfort caused by the patient lying for a long time, the patient is still prone to involuntary movement during the treatment process, resulting in treatment deviation. When using a treatment bed with the composite layered structure of this embodiment, before the treatment, the upper surface of the adjustment layer is a plane. When the patient lies on it, the adjustment layer can be controlled to enter the plastic state, so that the shaped outer shape of the adjustment layer matches the patient's body shape. When the deformation of the adjustment layer tends to be stable, the thermoplastic material enters the shaping state and becomes a hard material again, so as to achieve structural support for the patient's body, reduce the discomfort of the patient and the risk of injury, and keep the patient's body shape and the bed board shape fixed during the treatment process, achieving both the accuracy and comfort of the treatment, being more reasonable, improving the tolerance of the patient for a single long-term treatment, and making the patient more comfortable and more acceptable.

[0011] Preferably, the composite layered structure also includes an anti-radiation support layer, one side of which is fixedly connected to one side of the adjustment layer, and the anti-radiation support layer includes multiple second skeleton monomers and a lead-containing composite material uniformly mixed with each second skeleton monomer.

[0012] The radiation protection support layer is used to provide mechanical support for the adjustment layer. In addition, due to the use of lead-containing composite materials, the radiation protection support layer also has a shielding and protection function. During radiotherapy, the radiation protection support layer can shield radiation from electrons, protons, and neutrons to avoid radiation leakage, and can also reduce the additional radiation received by people in the treatment room.

[0013] Preferably, the composite layered structure also includes a rigid support layer, one side of which is fixedly connected to a side of the anti-radiation support layer facing away from the adjustment layer, and the rigid support layer is a hard plate-like structure for supporting the adjustment layer and the anti-radiation support layer structure.

[0014] Preferably, the composite layered structure is fixedly connected with an adjustment layer, an anti-radiation support layer and a rigid support layer in sequence from top to bottom along the direction of gravity; the thermoplastic material is polyurethane, preferably shape-memory polyurethane, which has a thermal shape memory effect. When the temperature is higher than the deformation temperature, the thermoplastic material becomes soft and deformable, and can provide flexibility and adjustability, so that the material has good fit; the first skeleton is a carbon fiber mesh sheet; the material of the filamentary resistor is NiCr alloy; the external power supply can emit pulse current; the second skeleton monomer is carbon fiber particles; the lead-containing composite material is a mixture of lead and resin; the rigid support layer is a carbon fiber composite plate, and the carbon fiber composite plate has a honeycomb structure, which provides better compressive resistance through the honeycomb structure. At the same time, in actual application, it is convenient to reserve embedded connectors at the preset fixed points of the rigid support layer to facilitate the later fixation of the patient.

[0015] Preferably, in the composite layered structure, the weight percentage of thermoplastic material ranges from 20% to 60%, the weight percentage of lead ranges from 20% to 50%, and the sum of the weights of the first skeleton, the second skeleton monomer, and the rigid support layer ranges from 10% to 50%.

[0016] Preferably, in the composite layered structure, the weight percentage of thermoplastic material is 40%, the weight percentage of lead is 30%, and the weight percentage of the sum of the weights of the first skeleton, the second skeleton monomer, and the rigid support layer is 30%.

[0017] Preferably, the composite layered structure has a plurality of partitions, and the filamentary resistors are grouped according to the regions, each group is respectively connected to an external power source, and each of the external power sources is electrically connected to a control system;

[0018] The control system can separately control and adjust the on / off of the current and the magnitude of the current of each external power supply;

[0019] A temperature sensor is respectively installed in each area, and the signal output ends of the temperature sensors are respectively electrically connected to the control system, and the control system can collect the temperature values of the temperature sensors;

[0020] When precise control of the deformation degree of each different area is required, the control system monitors the temperature values of different partitions in real time, and correspondingly controls the on / off of the current and the magnitude of the current in the corresponding area; This optimized solution is applicable to the situation where the patient has undergone body shape adaptation before treatment, but still moves during the treatment process, and can adjust the shape of the composite layered structure in real time and efficiently during the treatment process, so that it can better adapt to the patient's body shape and fit the patient's body type more closely.

[0021] In a second aspect, the present invention also provides a preparation method of a composite layered structure, using the composite layered structure as described above, including the following steps:

[0022] S1. Heat the thermoplastic material to melt it into a liquid state, then place the first skeleton into a mold, and then pour the liquid thermoplastic material into the first mold for casting and molding, and take it out after cooling to obtain an adjustment layer;

[0023] S2. Mix lead and resin in proportion to obtain a lead-containing gel mixture, then add a second skeleton monomer to the obtained lead-containing gel mixture, fully stir to obtain a lead-containing composite material, pour the lead-containing composite material into a second mold, and apply pressure for molding to obtain a radiation protection support layer;

[0024] S3. Take the raw material of a rigid plate-like structure, cut it according to the outer shape dimensions of the adjustment layer and the radiation protection support layer to obtain a rigid support layer;

[0025] S4. Fix and connect the adjustment layer, the radiation protection support layer and the rigid support layer in sequence from top to bottom along the gravity direction to obtain a composite layered structure.

[0026] Preferably, in step S4, the adjustment layer, the radiation protection support layer and the rigid support layer are hot-pressed and cured under a preset pressure and a preset temperature to realize the fixed connection between the layers; the obtained composite layered structure is cured and stabilized at a constant temperature and normal pressure according to a preset time. After the curing and stabilizing time reaches the preset time, it is gradually cooled to the normal temperature state to obtain a cured and stabilized composite layered structure.

[0027] In a third aspect, a bed board structure of a treatment bed is used for being installed on a bed frame. It is characterized in that it is manufactured by using the preparation method of the composite layered structure as described in claim 7 and processed according to a preset size.

[0028] The present invention has the following beneficial effects:

[0029] In the solution of the present invention, a thermoplastic material is heated by a filamentous resistor to make it soft. Before treatment, the upper surface of the adjustment layer is a plane. When a patient lies on it, the adjustment layer can be controlled to enter the plastic state, so that the shaped outer shape of the adjustment layer fits the body shape of the patient. When the deformation of the adjustment layer tends to be stable, the thermoplastic material enters the setting state and becomes a hard material again, so as to realize structural support for the patient's body, reduce the discomfort of the patient and lower the risk of injury, and keep the patient's body shape and the bed board shape fixed during the treatment process. After marking the treatment target position, it is ensured that the treatment target position will not change during the treatment process, achieving both the accuracy and comfort of treatment, being more reasonable, improving the tolerance of the patient for a single long-term treatment, and making the patient more comfortable and more acceptable. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to make the purpose, technical solution and advantages of the invention clearer, the present invention will be further described in detail below with reference to the drawings, where:

[0031] Figure 1 is the bed board of the treatment bed in the prior art.

[0032] Figure 2 is a schematic cross-sectional view of the composite layered structure of the present invention.

[0033] Figure 3 is a schematic cross-sectional view of the deformed composite layered structure of the present invention.

[0034] Figure 4 is a schematic diagram of the steps of the preparation method of the composite layered structure of the present invention.

[0035] Description of the reference numerals: 100, adjustment layer; 101, thermoplastic material; 102, first skeleton; 103, filamentous resistor; 200, radiation protection support layer; 201, lead-containing composite material; 202, second skeleton monomer; 300, rigid support layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] In order to more clearly elaborate the purpose, technical solution and advantages of the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be described in detail and completely below with reference to the drawings. It should be noted that the same reference numerals and letters in the drawings represent similar components. Once a component is defined in one drawing, it will not be redefined and explained in subsequent drawings.

[0037] The present invention can be applied to treatment processes where patients need to receive treatment in a long-term lying and fixed position, including but not limited to radiotherapy, such as electron therapy, proton therapy, neutron therapy, etc., and is applicable to patients with special body shapes, including but not limited to patients with skeletal deformities, such as scoliosis. The present invention solves the technical problem in the prior art that during the treatment process where patients need to receive treatment in a long-term lying and fixed position, the bed board of the treatment bed is a hard bed board and cannot fit well with the patient's body shape. Although other auxiliary fixing measures are adopted, due to the discomfort caused by the patient lying for a long time, the patient is still prone to involuntary movement during the treatment process, resulting in treatment deviation.

[0038] The technical concept of the present invention is: how to improve the bed board of the treatment bed so that it can adjust the shape of the treatment bed board surface adaptively according to the patient's body shape, and has sufficient strength to support the patient's body during the treatment process, and at the same time can have characteristics such as multiple reuse and universality.

[0039] Based on the above invention concept, the applicant first considered improving the material for making the bed board of the treatment bed. However, existing soft materials or elastic materials, such as spring mattresses, latex pads, etc., are difficult to be applied to treatment beds. The reason is that when the patient breathes, the body will rise and fall with the breathing rhythm. If soft materials or elastic materials are used, the treatment bed is likely to deform with the breathing rhythm during breathing, which will then cause the patient's position to change, and further cause the treatment position to change. Therefore, the applicant considered using a brand-new composite material to make the bed board of the treatment bed, so that it can adjust the shape of the treatment bed board surface adaptively according to the patient's body shape, and has sufficient strength to support the patient's body during the treatment process, reduce the discomfort of the patient and lower the risk of injury, and keep the patient's body shape and the bed board shape fixed during the treatment process, achieving both accuracy and comfort, being more reasonable, with the flexible material evenly distributed without pressure, improving the patient's tolerance for long-term treatment, and making the patient more receptive. In addition, the applicant also considered adjusting the shape of the bed board through weak current, without the need for cumbersome manual adjustment, improving the clinical use efficiency. The technical solution adopted by the applicant has three core advantages compared with the prior art, namely dynamic adaptability, precise fixation and high comfort, and has extremely strong applicability.

[0040] Adopting the composite layered structure and its preparation method disclosed by the present invention, the bed board structure of the treatment bed has the following technical effects:

[0041] 1. The solution of the present invention heats the thermoplastic material through a filamentous resistor to make it soft. Before treatment, the upper surface of the adjustment layer is flat. When a patient lies on it, the adjustment layer can be controlled to enter the plastic state, so that the shaped outer shape of the adjustment layer fits the patient's body shape. When the deformation of the adjustment layer tends to be stable, the thermoplastic material enters the setting state and becomes a hard material again, so as to realize the structural support for the patient's body, reduce the discomfort of the patient and lower the risk of injury, and keep the patient's body shape and the shape of the bed board fixed during the treatment process. After marking the treatment target position, it is ensured that the treatment target position will not change during the treatment process, achieving both the accuracy and comfort of the treatment, being more reasonable, improving the tolerance of the patient for a single long-term treatment, and making the patient more comfortable and more acceptable.

[0042] 2. The radiation-proof support layer can not only provide sufficient structural support for the adjustment layer but also absorb radioactive elements, effectively absorb radiation, and reduce its impact on the patient. The proportion of lead powder is to ensure that in the actual use of the material, it will not be too heavy and can provide sufficient radiation protection.

[0043] 3. The rigid support layer can further improve the structural strength of the entire composite layered structure, adapt to patients of more weight types, and ensure that the patient is stably fixed on the bed surface during treatment, avoiding deformation due to external forces.

[0044] In order to elaborate in detail the composite material, preparation method, and the structure of the treatment bed board of the present invention, the following application examples are disclosed in the present invention.

[0045] Example 1, please refer to Figure 2 and Figure 3 , this example provides a composite layered structure for adapting to the patient's body shape and providing support, including an adjustment layer 100;

[0046] The adjustment layer 100 includes a first skeleton 102, the first skeleton 102 has a plurality of first voids, and thermoplastic materials 101 are provided both on the outer periphery of the first skeleton 102 and in each of the first voids;

[0047] A plurality of filamentous resistors 103 are also evenly distributed in the adjustment layer 100, and each of the filamentous resistors 103 is in uniform contact with the thermoplastic material 101; each of the filamentous resistors 103 is respectively used for electrically connecting with an external power supply. When the external power supply is energized, the filamentous resistor 103 can generate heat, and the temperature value of the thermoplastic material 101 rises to be greater than or equal to the deformation temperature value, and the thermoplastic material 101 enters the plastic state. When the external power supply is powered off, the filamentous resistor 103 stops generating heat, and the temperature value of the thermoplastic material 101 drops to be less than the deformation temperature value, and the thermoplastic material 101 enters the setting state.

[0048] For the composite layered structure provided in this embodiment, when an object with a certain mass is placed on its upper surface along the gravity direction and an external power supply is connected, the thermoplastic material 101 is heated to the deformation temperature, and the thermoplastic material 101 enters the plastic state. Under the action of gravity, the adjustment layer 100 sags downward vertically to form a shaped outer contour that matches the outer contour of the object. When the deformation of the adjustment layer 100 tends to be stable, the external power supply is disconnected, so that the filamentous resistor 103 stops generating heat, the thermoplastic material 101 cools down to the deformation temperature, and the thermoplastic material 101 enters the setting state and becomes a hard material again.

[0049] Specifically, the plastic state means that when the temperature value of the thermoplastic material 101 is higher than the deformation temperature value, its own hardness decreases and it becomes a flexible material, and it can deform under the condition of external pressure; the setting state means that when the temperature value of the thermoplastic material 101 is lower than the deformation temperature value, its own hardness increases and it becomes a hard material, and it is difficult to deform under the condition of external pressure and can provide sufficient structural support for the object placed above it. In this embodiment, the value range of the deformation temperature value is 50°C to 80°C.

[0050] When the technical solution of this embodiment is applied to a treatment bed that requires the patient to receive treatment in a long-term lying and fixed posture, it can solve the technical problem in the prior art that the bed board of the treatment bed is a hard bed board and cannot fit well with the patient's body shape. Although other auxiliary fixing measures are adopted, due to the discomfort caused by the patient's long-term lying, the patient is still prone to involuntary movement during the treatment process, resulting in treatment deviation. When using a treatment bed with the composite layered structure of this embodiment, before the treatment, the upper surface of the adjustment layer 100 is a plane. When the patient lies on it, the adjustment layer 100 can be controlled to enter the plastic state, so that the shaped outer contour of the adjustment layer 100 matches the patient's body shape. When the deformation of the adjustment layer 100 tends to be stable, the thermoplastic material 101 enters the setting state and becomes a hard material again to realize the structural support for the patient's body, reduce the discomfort of the patient and the risk of injury, and keep the patient's body shape and the bed board shape fixed during the treatment process, achieving both the accuracy and comfort of the treatment, being more reasonable, improving the tolerance of the patient for a single long-term treatment, and making the patient more comfortable and more receptive. Specifically, the thickness range of the adjustment layer is 4 to 5 mm.

[0051] Example 2, on the basis of Example 1, please refer to Figure 2, the composite layered structure further includes a radiation protection support layer 200, one side of the radiation protection support layer 200 is fixedly connected to one side of the adjustment layer 100, and the radiation protection support layer includes a plurality of second skeleton monomers 202 and a lead-containing composite material 201 uniformly mixed with each second skeleton monomer 202. The radiation protection support layer 200 is used to provide mechanical support for the adjustment layer 100. In addition, due to the use of the lead-containing composite material 201, the radiation protection support layer 200 also has a shielding protection function. In radiotherapy, the radiation protection support layer 200 can shield radiation from electrons, protons, and neutrons, avoid radiation leakage, and can also reduce the additional radiation received by people moving in the treatment room.

[0052] Example 3, based on Example 1 or Example 2, please refer to Figure 2 , the composite layered structure further includes a rigid support layer 300, one side of the rigid support layer 300 is fixedly connected to the side of the radiation protection support layer 200 facing away from the adjustment layer 100, and the rigid support layer 300 is a rigid plate-like structure for structurally supporting the adjustment layer 100 and the radiation protection support layer 200.

[0053] Example 4, based on Example 3, in the composite layered structure, the weight percentage range of the thermoplastic material is 20% - 60%, the weight percentage range of lead is 20% - 50%, and the weight percentage range of the sum of the weights of the first skeleton, the second skeleton monomer, and the rigid support layer is 10% - 50%.

[0054] In this embodiment, experiments on the weight percentages of each main material are carried out. It is required that the multi-layer composite layered structure should have good stiffness to avoid deformation affecting the treatment accuracy, and also have appropriate flexibility for personalized adjustment before treatment.

[0055] Specifically, the following experimental groups are set up to select the optimal ratio scheme. The percentages in the following content all refer to the weight percentages of the corresponding materials in the composite layered structure, and the first skeleton, the second skeleton monomer, and the rigid support layer are collectively referred to as the skeleton.

[0056] Experimental group A (20% thermoplastic material + 30% lead + 50% skeleton): Using this ratio can be applicable to situations that require high mechanical strength and radiation protection. A higher proportion of carbon fiber can ensure the rigidity and stability of the material.

[0057] Experimental group B (40% thermoplastic material + 30% lead + 30% skeleton): This ratio has both good flexibility and strong radiation protection, is suitable for situations with high comfort requirements for patients during the treatment process, and has sufficient support strength.

[0058] Experimental group C (60% thermoplastic material + 20% lead + 20% framework): This ratio provides better comfort for patients and is suitable for personalized adjustment before treatment. The relatively high proportion of thermoplastic material makes the material softer and more adaptable.

[0059] Experimental group D (30% thermoplastic material + 40% lead + 30% framework): This ratio has a relatively high proportion of lead and can effectively absorb radiation. It is suitable for treatment scenarios with high radiation protection requirements.

[0060] Experimental group E (50% thermoplastic material + 40% lead + 10% framework): This ratio has good radiation protection ability and a certain degree of flexibility. It is suitable for scenarios that require high-precision positioning and high radiation shielding requirements during treatment.

[0061] Experimental group F (30% thermoplastic material + 50% lead + 20% framework): This ratio focuses on radiation protection and has a high proportion of lead, so the radiation protection effect is stronger. It is suitable for the design of the treatment couch surface in a high-radiation environment.

[0062] Among them, the optimal ratio is 40% thermoplastic material + 30% lead + 30% framework (Example B). This ratio can balance the flexibility, strength, and radiation protection of the material. On the basis of ensuring comfort and personalized adjustment, it can still provide sufficient mechanical strength and high radiation shielding effect. Therefore, preferably, in the composite layered structure, the weight percentage of the thermoplastic material is 40%, the weight percentage of lead is 30%, and the weight percentage range of the sum of the weights of the first framework, the second framework monomer, and the rigid support layer is 30%. The 30% lead content can provide about 1.5 cm equivalent lead layer protection.

[0063] Example 5, based on Examples 3 and 4, please refer to Figure 2 and Figure 3 to give a preferred example. The composite layered structure is fixedly connected with an adjustment layer 100, a radiation protection support layer 200, and a rigid support layer 300 in sequence from top to bottom along the gravity direction;

[0064] The thermoplastic material 101 is made of polyurethane, preferably shape memory polyurethane. This material has a thermally induced shape memory effect. When the temperature is higher than the deformation temperature, the thermoplastic material 101 becomes soft and deformable, which can provide flexibility and adjustability, making the material have good conformability;

[0065] The first skeleton 102 is a carbon fiber mesh sheet. The sheet structure can provide a certain structural support force. At the same time, the sheet structure occupies less space in the thickness direction and will not affect the overall adjustment function of the adjustment layer. The material of the filamentous resistor 103 is NiCr alloy. The external power supply can emit pulsed current to generate the Joule heating effect. In a specific example, a 24V pulsed direct current is used to control the heating power per square centimeter at 5W, and the polyurethane can be heated to 60°C to 80°C within 5 seconds, reducing the hardness of the polyurethane layer. By evenly embedding the carbon fiber mesh in the flexible polyurethane, a conductive thermal response layer is formed to achieve shape adjustment. Specifically, in this embodiment, the carbon fiber mesh sheet includes a plurality of carbon fiber meshes arranged in an array, and the area of each carbon fiber mesh ranges from 0.03 to 0.2mm 2 , and the thickness of the carbon fiber mesh sheet is 2 - 3mm.

[0066] Specifically, in the adjustment layer 100, the carbon fiber mesh sheet is embedded in the evenly distributed polyurethane, and the evenly distributed filamentous resistors 103 are arranged to form a conductive thermal response layer. The temperature of the polyurethane is adjusted by adjusting the magnitude of the current to assist in shape adjustment.

[0067] The second skeleton monomer 202 is a carbon fiber particle, and the diameter range of the carbon fiber particle is 1 - 2mm. Using the carbon fiber particle as the second skeleton monomer can enable it to be fully mixed evenly with the lead-containing composite material during preparation, and at the same time can provide sufficient and uniform structural support. The lead-containing composite material 201 is a mixture of lead and resin. In the lead-containing composite material, the mass percentage range of lead is 20 - 40%, and the mass percentage range of resin is 60 - 80%. Lead (Pb) can enhance the radiation protection ability of the material. In radiotherapy, the radiation protection support layer 200 can shield radiation from electrons, protons, and neutrons, avoid radiation leakage, and also reduce the additional radiation received by people moving in the treatment room. Specifically, the material form of the lead can be lead blocks, lead sheets, lead particles, or lead powder, preferably lead powder, and the specific gravity of lead powder is 11.34g / cm 3 . Preferably, in the lead-containing composite material, the mass percentage of lead powder is 30%, and the mass percentage of resin is 70%. Under this ratio condition, radiation protection, processability, and mechanical properties can be ensured simultaneously. Preferably, in the lead-containing composite material, the mass percentage of lead powder is 35%, and the mass percentage of resin is 65%. Under this ratio condition, radiation protection, processability, and mechanical properties can be ensured simultaneously.

[0068] Specifically, the radiation protection support layer 200 mainly provides mechanical support and neutron shielding capabilities, ensuring that the bed board will not deform when bearing a weight of 200 kg or more, and having an equivalent lead layer protection to effectively absorb radiation. Additionally, during the treatment process, X-rays may be needed to detect the patient's body parameters, and the radiation protection support layer 200 can also ensure the transparency of the patient's X-ray image to avoid affecting the imaging accuracy.

[0069] The rigid support layer 300 is made of a carbon fiber composite board. Specifically, a high-density carbon fiber reinforced composite layer is used, which has the characteristics of high rigidity and light weight. The carbon fiber composite board has a honeycomb structure, which provides better compressive performance through the honeycomb structure. At the same time, in actual applications, it is convenient to reserve embedded connectors at the preset fixed points of the rigid support layer 300 for later patient fixation.

[0070] Mechanical performance tests were carried out on the composite layered structure of this embodiment with different ratios, and the neutron shielding rate was detected during the neutron treatment process. Among them, the first framework 102, the second framework monomer 202, and the rigid support layer 300 are collectively referred to as the carbon fiber framework.

[0071] Experimental tests were carried out on indicators such as the tensile strength, flexural strength, and Young's modulus of different ratios:

[0072]

[0073]

[0074] Verified by experimental data, 40% polyurethane, 30% lead, and 30% carbon fiber framework is the optimal ratio, and its advantages are as follows:

[0075] Moderate stiffness to ensure no deformation during treatment, and at the same time, personalized adjustment can be carried out before treatment; excellent radiation protection ability, with a neutron shielding rate of up to 92% to avoid radiation leakage; the best adjustability and can remain stable after the treatment starts.

[0076] The following is to apply current to verify the softening degree and deformation amount. The material is 40% polyurethane, 30% lead, and 30% carbon fiber framework, the current range: 0 A to 5 A, and the deformation measurement method: apply current to a material block of 50 mm × 50 mm × 10 mm. The conclusion is that when the current ≥ 4 A, the material can be quickly heated to the plastic state (65 °C), and after releasing the current, the material returns to the shaped state within 12 s and the shape can be kept stable.

[0077]

[0078] Cool the material at different temperatures and test the change in its stiffness. The conclusion is that the stiffness is restored at low temperatures, which can ensure that it does not deform during treatment. At 65 °C, the stiffness is reduced by 70%, and shape adjustment can be performed.

[0079] Temperature (°C) Young's modulus (MPa) Deformation recovery rate (%) 25℃ 85 99％ 50℃ 40 80 65℃ 25 60

[0080] Therefore, preferably, in the composite layered structure of this embodiment, the weight percentage of polyurethane is 40%, the weight percentage of lead is 30%, and the weight percentage range of the sum of the weights of the first skeleton, the second skeleton monomer, and the rigid support layer is 30%. Applying this solution to actual tests, it is found that after the patient has taken ten breaths, their body posture remains basically unchanged. After the shape adjustment is completed, heating is stopped and cooling is carried out, and the material rigidity is restored, entering the fixed mode. During the whole process, softening and curing can be completed within a few seconds, and the response speed is fast.

[0081] During specific implementation, for further optimization, the composite layered structure is divided into multiple partitions, and each filamentous resistor is grouped according to the region. Each group is respectively connected to an external power supply, and each of the external power supplies is electrically connected to a control system;

[0082] The control system can respectively control and adjust the on-off and magnitude of the current of each external power supply;

[0083] A temperature sensor is respectively installed in each region, and the signal output ends of each of the temperature sensors are respectively electrically connected to the control system. The control system can collect the temperature values of each temperature sensor;

[0084] When it is necessary to precisely control the deformation degree of each different region, the control system, through real-time monitoring of the temperature values of different partitions, correspondingly controls the on-off and magnitude of the current in the corresponding region; This optimized solution is applicable to the situation where the patient has undergone body shape adaptation before treatment but still moves during treatment. It can adjust the shape of the composite layered structure in real time and efficiently during treatment, making it more adaptable to the patient's body shape and more fitting to the patient's body. Specifically, in the embodiment of the partition, a total of eight partitions are set, and each partition respectively corresponds to the head, chest, waist, buttocks, left arm, right arm, left leg, and right leg of the human body. The deformed area can be adjusted with high adaptability and precision.

[0085] Example 7, on the basis of Example 1, please refer to Figure 4 , this embodiment also provides a preparation method of a composite layered structure, using the composite material as described in any one of Examples 4 to 6, including the following steps:

[0086] S1. Heat the thermoplastic material 101 until it melts into a liquid state. Then, place the first skeleton 102 into the mold, and pour the liquid thermoplastic material 101 into the first mold for casting and molding. After cooling, take it out to obtain the adjustment layer 100;

[0087] S2. Mix lead and resin in a certain proportion to obtain a lead-containing gel mixture. Then, add the second skeleton monomer 202 to the obtained lead-containing gel mixture, and stir well to obtain the lead-containing composite material 201. Pour the lead-containing composite material 201 into the second mold and apply pressure for molding to obtain the radiation-proof support layer 200;

[0088] S3. Take the raw material of the rigid plate-like structure and cut it according to the outer shape dimensions of the adjustment layer 100 and the radiation-proof support layer 200 to obtain the rigid support layer 300;

[0089] S4. Fix and connect the adjustment layer 100, the radiation-proof support layer 200, and the rigid support layer 300 in sequence from top to bottom along the gravity direction to obtain the composite layered structure.

[0090] Specifically, in step S1, after pouring the liquid thermoplastic material into the first mold, bubbles are removed by uniformly applying pressure, and it is kept stable for 6 hours under the condition of a constant temperature of 80°C.

[0091] Specifically, in step S2, a lead-containing gel mixture is made of lead powder and resin. In addition, the lead powder needs to be pretreated in advance. The specific pretreatment is to coat an anti-oxidation coating on the surface of the lead powder to prevent material aging. The high-pressure molding process is used during pressing to ensure the material density. After pressing and molding, it also needs to be kept stable for 8 hours under the condition of a constant temperature of 100°C to form a layered structure with good radiation-proof performance. In the lead-containing composite material, the range of the mass percentage of lead is 20-40%, and the range of the mass percentage of resin is 60-80%. Lead powder (Pb) can enhance the radiation protection ability of the material. In radiotherapy, the radiation-proof support layer 200 can shield the radiation from electrons, protons, and neutrons, avoid radiation leakage, and also reduce the additional radiation received by people moving in the treatment room; specifically, the specific gravity of the used lead powder is 11.34 g / cm 3 . Preferably, in the lead-containing composite material, the mass percentage of lead powder is 30%, and the mass percentage of resin is 70%. Under this ratio condition, radiation protection, processability, and mechanical properties can be ensured simultaneously. Preferably, in the lead-containing composite material, the mass percentage of lead powder is 35%, and the mass percentage of resin is 65%. Under this ratio condition, radiation protection, processability, and mechanical properties can be ensured simultaneously.

[0092] Specifically, in step S3, it is made by cutting and precision machining a high-strength carbon fiber composite board to ensure shape matching, and surface treatment is carried out to improve the effect of later fixed connection.

[0093] In this embodiment, preferably, in step S4, the adjustment layer, the radiation-proof support layer, and the rigid support layer are hot-pressed and cured under a preset pressure and a preset temperature to achieve fixed connection between the layers; the preset pressure value is greater than or equal to 10 MPa, and the preset temperature is greater than or equal to 120 °C.

[0094] In this embodiment, preferably, in step S4, the obtained composite layered structure is cured and stabilized at a constant temperature and normal pressure for a preset time. After the curing and stabilizing time reaches the preset time, it is gradually cooled to the normal temperature state to obtain the cured and stabilized composite layered structure. The curing temperature is preferably 80 °C, and the preset time is preferably 6 hours.

[0095] Specifically, in step S4, the adjustment layer, the radiation-proof support layer, and the rigid support layer can also be bonded by a chemical adhesive.

[0096] Embodiment 8. This embodiment also provides a bed board structure of a treatment bed, which is used to be installed on a bed frame and is manufactured by using the preparation method of the composite layered structure as described in Embodiment 7 and processed according to a preset size.

[0097] When preparing the bed board, after preparing the composite layered structure by using the preparation method of the composite layered structure as described in Embodiment 7, numerical control cutting is also required to ensure a smooth surface and reserve a current channel; then a filamentous resistor is installed in the current channel to form a controllable heating area; each of the filamentous resistors is electrically connected to an external power supply, and the external power supply uses a 24V pulsed direct current; then the quality of the bed board structure is detected to ensure that the material can withstand a 200 kg load, without permanent deformation, and the lead shielding rate > 90%, which can effectively block radiation, and the control error < 0.1 mm to ensure no position deviation during the treatment process.

[0098] In actual application, finally, the bed board structure is installed on the bed frame or other support frames and used as an integral treatment bed.

[0099] This embodiment provides a preset size that can be applied in practice, but the preset size can be adjusted according to actual needs and is not limited to the listed sizes.

[0100] Specifically, the size of the bed board is 200 cm (length) × 80 cm (width) × 4.5 cm (thickness). The maximum patient load requirements are: height 190 cm and weight 200 kg. The distribution of each layer in the composite laminated structure is as follows: adjustment layer (flexible adjustment layer): 5 mm thick, b radiation protection support layer (radiation protection layer): 30 mm thick, c rigid support layer (rigid support layer): 10 mm thick.

[0101] Total weight calculation:

[0102] Material <![CDATA[Volume (cm 3 )]]> <![CDATA[Density (g / cm 3 )]]> Mass (kg) Polyurethane (40%) 576000 1.2 6.9 Lead powder (30%) 432000 11.34 49.0 Carbon fiber (30%) 432000 1.6 6.9 Total 62.8 kg

[0103] During the actual application process, during the preparation stage of the treatment bed board, the treatment bed board is preheated first. After the patient lies on the bed, a conventional (the shape and appearance of the treatment bed board have no special difference from the appearance and connection and fixing device interface of the conventional treatment bed board) radiotherapy fixing device is used to fix the patient to the bed surface, and then the adjustment of the bed board surface for the patient starts. By changing the shape of the adjustment layer of the bed board surface to make it fit the patient's body shape and improve comfort, this solution can solve the technical problems in the prior art that the bed board of the treatment bed is a hard bed board and cannot fit the patient's body shape, causing discomfort for the patient during long-term lying, and prone to involuntary movement during the treatment process, resulting in treatment deviation.

[0104] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the conventional placement orientation or positional relationship when the product of the present invention is in use. The use of these terms is only for the convenience of describing the present invention and simplifying the description, and does not mean that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish different components or steps, and do not indicate or imply relative importance. Additionally, the terms "horizontal", "vertical", etc. do not mean that the components must be absolutely horizontal or hanging vertically, but allow a certain degree of inclination. For example, "horizontal" only means that its direction is closer to the horizontal state relative to "vertical", rather than requiring the structure to be completely horizontal. In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected to", etc. should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can also be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0105] It should also be noted that the present invention is illustrated by a number of embodiments. Those skilled in the art should understand that, without departing from the core spirit and scope of the present invention, various modifications, adjustments or equivalent replacements can be made to the features in these embodiments. According to the guiding ideology of the present invention, those skilled in the art can make appropriate adjustments to the embodiments according to the specific application scenarios and materials without exceeding the protection scope of the present invention. It should be pointed out that the embodiments described in the present invention are only a part, rather than all, of the numerous embodiments of the present invention. Each component of the embodiments of the present invention shown in the drawings can be arranged and designed in different configurations according to actual needs. Therefore, the above detailed description of the embodiments shown in the drawings is not intended to limit the protection scope of the present invention, but only to elaborate on some embodiments of the present invention. The protection scope of the present invention should not be limited to the specific embodiments disclosed herein. All other embodiments obtained by those skilled in the art without creative efforts based on the embodiments of the present invention shall fall within the protection scope of the present invention.

Claims

1. A composite layered structure for adapting to a patient's body shape and providing support, characterized in that, It includes an adjustment layer, which includes a first skeleton, the first skeleton has a plurality of first gaps, and the periphery of the first skeleton and each of the first gaps have thermoplastic material; the adjustment layer is also evenly distributed with a plurality of filamentary resistors, and each of the filamentary resistors is evenly in contact with the thermoplastic material; each of the filamentary resistors is respectively used to be electrically connected to an external power supply, when the external power supply is powered on, the filamentary resistor can generate heat, the temperature value of the thermoplastic material rises to a value greater than or equal to the deformation temperature value, and the thermoplastic material enters a plastic state, and when the external power supply is powered off, the filamentary resistor stops generating heat, the temperature value of the thermoplastic material drops to a value less than the deformation temperature value, and the thermoplastic material enters a fixed state.

2. The composite layered structure according to claim 1, wherein The composite layered structure also includes an anti-radiation support layer, one side of which is fixedly connected to one side of the adjustment layer, and the anti-radiation support layer includes a plurality of second skeleton monomers and a lead-containing composite material uniformly mixed with each second skeleton monomer.

3. The composite layered structure according to claim 2, characterized in that, The composite layered structure also includes a rigid support layer, one side of which is fixedly connected to a side of the radiation protection support layer facing away from the adjustment layer. The rigid support layer is a hard plate-like structure used to support the adjustment layer and the radiation protection support layer structure.

4. The composite layered structure according to claim 3, wherein The composite layered structure is fixedly connected with an adjustment layer, an anti-radiation support layer and a rigid support layer in sequence from top to bottom along the direction of gravity; the thermoplastic material is polyurethane; the first skeleton is a carbon fiber mesh sheet; the material of the filamentary resistor is NiCr alloy; the external power supply can emit pulse current; the second skeleton monomer is carbon fiber particles; the lead-containing composite material is a mixture of lead and resin; the rigid support layer is a carbon fiber composite plate, and the carbon fiber composite plate has a honeycomb structure.

5. The composite layered structure according to claim 3, characterized in that, In the composite layered structure, the weight percentage of the thermoplastic material ranges from 20% to 60%, the weight percentage of lead ranges from 20% to 50%, and the sum of the weights of the first skeleton, the second skeleton monomer, and the rigid support layer ranges from 10% to 50%.

6. The composite layered structure according to claim 3, wherein In the composite layered structure, the weight percentage of the thermoplastic material is 40%, the weight percentage of the lead is 30%, and the weight percentage of the sum of the weights of the first skeleton, the second skeleton monomer, and the rigid support layer is 30%.

7. The composite layered structure according to claim 1, characterized in that, The composite layered structure has a plurality of partitions, and the filamentary resistors are grouped according to the regions, each group is respectively connected to an external power source, and each of the external power sources is electrically connected to a control system; The control system can respectively control and adjust the current on and off and the current size of each external power supply; Each area is respectively installed with a temperature sensor, and the signal output end of each temperature sensor is respectively electrically connected to the control system, and the control system can collect the temperature value of each temperature sensor; When the deformation degree of each different area needs to be accurately controlled, the control system controls the current on / off and current size of the corresponding area through real-time monitoring of the temperature values of different partitions.

8. A method for preparing a composite layered structure, using the composite layered structure as described in claim 3, characterized in that, The following steps are involved: S1. Heat the thermoplastic material until it melts into a liquid state. Then, place the first skeleton into the mold, and pour the liquid thermoplastic material into the first mold for casting and molding. After cooling, take it out to obtain the adjustment layer; S2. Mix lead and resin in a certain proportion to obtain a lead-containing gel mixture. Then, add the second skeleton monomer to the obtained lead-containing gel mixture, and stir well to obtain a lead-containing composite material. Pour the lead-containing composite material into the second mold and apply pressure for molding to obtain the radiation protection support layer; S3. Take the raw material of the rigid plate-like structure and cut it according to the external dimensions of the adjustment layer and the radiation protection support layer to obtain the rigid support layer; S4. Fix and connect the adjustment layer, the radiation protection support layer, and the rigid support layer in sequence from top to bottom along the gravity direction to obtain a composite layered structure.

9. The method for preparing the composite layered structure according to claim 8, characterized in that, In step S4, the adjustment layer, the radiation protection support layer, and the rigid support layer are hot-pressed and cured under a preset pressure and a preset temperature to achieve fixed connection between the layers; the obtained composite layered structure is cured and stabilized at a constant temperature and normal pressure for a preset time. After the curing and stabilization time reaches the preset time, it is gradually cooled to the normal temperature state to obtain the composite layered structure after curing and stabilization.

10. A bed board structure of a treatment bed, which is used to be installed on a bed frame, is characterized in that It is prepared by using the preparation method of the composite layered structure according to claim 7 and processed according to the preset dimensions.

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