A breast cancer radiotherapy fixation device

Abstract

This invention relates to the field of breast cancer treatment technology, specifically providing a fixation device for breast cancer radiotherapy. The fixation device includes an adjustment assembly. A thin film disposed below the adjustment assembly has ventilation holes on a first substrate connected to it, which are connected to different tracheas. The rate at which gas is introduced into the inlet trachea is slightly less than the rate at which gas is drawn out of the outlet trachea. This creates a low-pressure environment between the thin film and the skin, achieving a close fit and effectively fixing the patient's breast. Furthermore, the design of allowing air to enter through one ventilation hole and drawing air out through the other promotes air circulation on the patient's skin surface. The inward blowing of air through the ventilation holes helps keep the patient's skin dry and removes sweat. Simultaneously, it helps prevent excessive suction from the outlet trachea on the other side, which could cause the thin film and adjustment assembly to compress the breast too tightly, resulting in pressure marks on the patient's skin.

Description

Technical Field

[0001] This invention relates to the field of breast cancer treatment technology, and more specifically to a fixation device for breast cancer radiotherapy. Background Technology

[0002] The female breast is composed of skin, fibrous tissue, mammary glands, and fat. Breast cancer is a malignant tumor that occurs in the epithelial tissue of the mammary glands. Studies show that breast cancer is the leading cause of cancer-related health threats to women. Radiotherapy is one of the primary treatment methods for breast cancer. A recognized challenge in breast cancer radiotherapy is breast fixation, mainly because breast tissue is soft, and movements of the shoulder, upper arm, elbow, forearm, and wrist can easily cause changes in body position. Currently, breast support frames are commonly used for patient fixation in breast cancer radiotherapy. However, when using a breast support frame alone, the support points are often fixed, causing discomfort for patients during prolonged radiotherapy. Furthermore, the lack of fixation for the head, neck, chest, and breast positions can easily lead to off-target radiation, affecting treatment efficacy and reducing the accuracy and repeatability of radiotherapy positioning.

[0003] Existing patents offer several solutions, such as patent US20080230074A1, which provides a device for fixing a human breast. This device includes a vacuum-assisted breast fixation cup comprising two substrate layers connected to an air space. The inner substrate layer has dense pores, while the outer substrate layer is sealed. When a negative vacuum is applied, breast tissue is drawn into the mesh wall of the inner layer of the intermediate air space to prevent slippage. Furthermore, the cup assembly is locked in a fixed position and secured to the patient's torso by a body fixation device. This patent achieves the technical effect of fixing the patient's chest and breast position, and the device is relatively easy to wear. However, due to the fixed shape of the outer fixation cup, it cannot adapt to different individuals, and prolonged wear can easily cause sweating and itching on the skin surface, leading to patient discomfort. Therefore, the inventors believe there is still significant room for improvement. Summary of the Invention

[0004] The purpose of this invention is to provide a fixation device that can fix the patient's mammary glands and breasts, can be dynamically adjusted according to the patient's individual body characteristics, can prevent the patient's treatment position from changing due to subconscious movement, and can provide better wearing comfort.

[0005] The present invention provides a fixation device for radiotherapy of breast cancer. The device includes a follower bracket with a first groove on the follower bracket and a sliding plate installed on the first groove. An application component is provided in the middle of the sliding plate. The application component includes multiple adjustment components. Adjacent adjustment components are connected by connectors. At least two thin films are provided at the bottom of the adjustment components. Multiple fine holes are arranged in an array on the surface of each thin film.

[0006] The sliding tray is equipped with at least two support brackets, the application component is positioned between the support brackets, and a head support is provided on one side of the application component, which is fixedly connected to the sliding tray.

[0007] Furthermore, the patient lies flat on the movable support frame, with the patient's head placed in the headrest, both arms placed on the armrests, and the popliteal fossa placed on the leg rests. The leg rests are fixedly connected to the movable support frame. After the patient lies down, the doctor can adjust the sliding plate, which can slide up and down relative to the movable support frame. After the doctor adjusts the sliding plate to the appropriate position (that is, the patient's head and popliteal fossa can be correctly placed on the headrest and leg rests), the doctor fastens the dressing component to the slot on the sliding plate and simultaneously starts the air pump. The air pump draws in and ventilates the film, thereby completing the fixation of the patient's body position and the chest and breast tissue.

[0008] In this invention, the adjustment component includes an adjustment base, a U-shaped groove is formed in the center of the adjustment base, and at least two through holes are provided on the side of the adjustment base, with the through holes located at the front and rear ends of the adjustment base.

[0009] In this invention, a soft pad is installed inside the U-shaped groove, and adjacent through holes on the side of the adjustment base are connected by flexible hoses. The flexible hoses are arranged in a serpentine pattern, and the connection points between the flexible hoses and the through holes are located on the left and right sides of the U-shaped groove.

[0010] Furthermore, before the patch comes into contact with the human body, the adjustment base needs to be heated. Specifically, hot air is introduced into the tubing, and the heat of the hot air is further transferred to the entire adjustment base and the pad. The adjustment base and the pad are heated and their temperature rises. This helps to make the temperature of the adjustment base and the pad match the temperature of the human skin, thereby preventing the patient from feeling cold when wearing it and improving the comfort of wearing this product.

[0011] In this invention, a first substrate extends outward from the lower surface of the adjustment component. The leftmost and rightmost sides of the first substrate are provided with outwardly extending bases. A thin film is connected between the bases, and two vent holes are opened on the side of the base. One vent hole is connected to an air inlet pipe, and the other vent hole is connected to an air outlet pipe. The two vent holes are not located on the same side.

[0012] Furthermore, the membrane below the adjustment component has ventilation holes on its side connected to different air tubes on the first substrate. Specifically, the inlet tube supplies gas, and the outlet tube draws gas in. The rate at which gas is supplied through the inlet tube is slightly less than the rate at which gas is drawn in through the outlet tube. This creates a low-pressure environment between the membrane and the skin, achieving adhesion and effectively fixing the patient's breast. It is important to emphasize that the first substrate is made of a flexible material, allowing it to easily bend and adapt to the deformation of the adjustment component and the membrane to fit and fix the patient's breast.

[0013] Furthermore, since patients often need to lie still for 1-3 hours during radiotherapy, prolonged wearing of the dressing and film can easily cause skin itching. Therefore, fine pores are made in the film, and the setting of air intake through one side vent and air exhaust through the other side promotes air circulation on the patient's skin surface. The air blowing in through the vent helps keep the patient's skin surface dry and can remove the sweat produced on the patient's skin surface. At the same time, it can also help prevent excessive suction from the other side vent, which would cause the film and adjustment components to compress the breast too tightly and cause pressure marks on the patient's skin surface.

[0014] In this invention, at least four second grooves are provided on the front and rear end faces of the adjustment component. The second grooves are symmetrically arranged on the upper and lower sides of the through hole. A connector is provided in the second groove. The connector includes two spherical bases. At most one spherical base is provided in the second groove. The spherical bases are connected by a first spring.

[0015] Furthermore, since the adjustment components are connected by connectors, when the air pump is activated to tighten the film, the adjustment components connected to the film are also subjected to the tightening force of the film, thus displacing and conforming to the patient's chest shape. Specifically, the connector mainly consists of a spherical base and a first spring connected within the second groove. When the film adheres to the patient's skin surface under air pressure, the adjustment components also displace. The first spring is stretched and compressed by the deformation of the film, thereby causing the spherical base connected to the end face of the first spring to displace left and right or up and down within the second groove. Through this connection between the first spring, the spherical base, and the second groove, on the one hand, it ensures that the adjustment components can accurately cover the patient's chest and provide fixation. The stretching and displacement in all directions achieved by the connection between the adjustment components can accommodate the patient's involuntary movements while lying down, avoiding affecting the fixation effect. This dressing component is suitable for various populations. On the other hand, the connector can restrict the position of the adjustment components, and the first spring can return to its original state after use, which helps to improve the service life of the device.

[0016] In this invention, the surface of the first groove is provided with two sliding grooves, each groove is provided with at least two limiting strips, and each groove is provided with at most two sliding parts. The height of the sliding parts does not exceed the depth of the groove, and the sliding parts are fixedly connected to the sliding support plate by bolts.

[0017] In this invention, at least two support brackets are provided on the sliding tray, the application component is disposed between the support brackets, and a head support is provided on one side of the application component, which is fixedly connected to the sliding tray.

[0018] Furthermore, the patient lies on the follow-up support, with the upper body positioned on the sliding support plate, the head resting on the headrest, and the hands placed on the armrests. The sliding support plate passively moves with the patient's involuntary movements, which helps ensure the follow-up support and sliding support plate move with the patient during treatment, thus maintaining the patient's stability. The sliding support plate is connected to the sliding component by bolts, limiting its displacement and preventing excessive sliding even when the patient only slightly moves their body.

[0019] In this invention, the sliding component includes a rubber plate, at least four elastic columns are connected to the rubber plate, and a cylindrical base block is connected to the other end of the elastic columns. The base block has a central hole and a bearing ring is provided inside the base block. A sleeve is provided inside the bearing ring and the sleeve is fixedly connected to the sliding support plate by bolts.

[0020] Furthermore, the side surface of the base block fits against the limiting strip in the sliding groove, while the sleeve on the inner side of the base block is connected by bolts, and a bearing ring is connected between the sleeve and the inner wall of the base block. This design allows the patient to move involuntarily, thereby causing the sliding tray to move. Specifically, the sliding tray and the sliding component are connected by bolts, and the movement of the sliding tray causes the sleeve to move. A bearing ring is provided between the base block and the sleeve, allowing the base block to rotate relative to the limiting strip, thus causing the base block to roll relative to the limiting strip. The rotation of the base block causes the rubber plate below to rotate as well.

[0021] Furthermore, since the patient's weight is applied to both the sliding tray and the sliding component when lying down, the limiting strip prevents the sliding tray from slipping due to the inertial force generated when the patient first lies down. At the same time, the weight causes the elastic column to compress, and the compressed elastic column expands laterally, further reducing the gap between the elastic column and the slide groove, thus creating contact. This increases the thrust required to drive the sliding component, thereby preventing the sliding tray from slipping due to the inertial force generated when the patient first lies down.

[0022] Furthermore, the sliding component creates a certain gap between the sliding tray and the follower bracket. When the patient lies on the sliding tray, the elastic column is compressed, reducing the gap between the sliding tray and the follower bracket. This ensures uniform contact between the surfaces of the sliding tray and the follower bracket, preventing uneven contact that could lead to excessive local sliding friction. This improves the contact effect between the follower bracket and the sliding tray, and avoids localized wear on the surface of the follower bracket or the sliding tray due to poor contact.

[0023] Compared with the prior art, the significant technical progress of the present invention is as follows: the adjustment component and the film are provided, and the film provided below the adjustment component has ventilation holes on the first substrate connected to the side, which are connected to different air pipes. The rate of gas input through the air inlet pipe is slightly less than the rate of gas suction through the air outlet pipe, thereby creating a low-pressure environment between the film and the skin of the human body to achieve adhesion and achieve the technical effect of fixing the patient's breast.

[0024] The design, which allows air to enter through one vent and exit through the other, promotes air circulation on the patient's skin surface. The air blowing inward through the vent helps keep the patient's skin surface dry and removes sweat. At the same time, it helps prevent excessive suction from the other vent, which could cause the membrane and adjustment components to compress the breast too tightly and cause pressure marks on the patient's skin surface.

[0025] The patient lies on the follow-up support, with the upper body positioned on the sliding support plate and the head resting on the headrest. The hands can be placed on the armrests. The sliding support plate passively moves with the patient's involuntary movements, which helps ensure the support and sliding support plate move with the patient during treatment, thus maintaining the patient's stability. Furthermore, the sliding support plate is connected to the sliding component by bolts, limiting its displacement and preventing excessive sliding even with slight swaying of the patient's body. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the breast cancer radiotherapy fixation device involved in the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of the radiotherapy fixation device according to the present invention after removing the sliding support plate;

[0028] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure at the CC section;

[0029] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle;

[0030] Figure 5 This is a schematic diagram of the dressing component structure involved in the present invention;

[0031] Figure 6 This is another structural schematic diagram of the dressing component involved in the present invention;

[0032] Figure 7 for Figure 5 Enlarged structural diagram at point B;

[0033] Figure 8 This is a schematic diagram of the sliding component structure involved in the present invention.

[0034] Explanation of reference numerals in the attached drawings: 11-Follow-up bracket; 111-First groove; 12-Sliding plate; 121-Slot; 13-Slide groove; 131-Limiting strip; 14-Sliding component; 141-Rubber plate; 142-Elastic column; 143-Base block; 144-Bearing ring; 145-Sleeve; 15-Hand bracket; 16-Head support; 17-Leg support; 2-Applying assembly; 21-Adjusting assembly; 211-Adjusting base; 212-U-shaped groove; 214-Soft pad; 215-Hose; 216-Second groove; 22-Connector; 221-Spherical base; 222-First spring; 23-First substrate; 232-Inlet pipe; 233-Outlet pipe; 24-Film. Detailed Implementation

[0035] Example 1:

[0036] Reference Attachment Figure 1 , Figure 2 , Figure 5 , Figure 6 As shown, the present invention provides a fixation device for radiotherapy of breast cancer. The device includes a follower bracket 11, a first groove 111 is provided on the follower bracket 11, a sliding plate 12 is installed on the first groove 111, an application component 2 is provided in the middle of the sliding plate 12, the application component 2 includes a plurality of adjustment components 21, adjacent adjustment components 21 are connected by connectors 22, a thin film 24 is provided at the bottom of the adjustment component 21, and a plurality of fine holes are arrayed on the surface of the thin film 24.

[0037] At least two support brackets 15 are provided on the sliding tray 12, and the application component 2 is disposed between the support brackets 15. A head support 16 is provided on one side of the application component 2, and the head support 16 is fixedly connected to the sliding tray 12.

[0038] Furthermore, the patient lies flat on the follow-up support 11, with the patient's head placed in the head support 16, both arms placed in the armrests 15, and the popliteal fossa placed in the leg support 17. The leg support 17 is fixedly connected to the follow-up support 11. After the patient lies down, the doctor can adjust the sliding plate 12, that is, the sliding plate 12 can slide up and down relative to the follow-up support 11. After the doctor adjusts the sliding plate 12 to the appropriate position (that is, the patient's head and popliteal fossa can be correctly placed in the head support 16 and leg support 17), the doctor fastens the dressing component 2 to the slot 121 on the sliding plate 12 and at the same time starts the air pump. The air pump draws and ventilates the membrane 24 to complete the fixation of the patient's body position and chest and breast.

[0039] In this invention, the adjustment component 21 includes an adjustment base 211, a U-shaped groove 212 is formed in the center of the adjustment base 211, and at least two through holes are provided on the side of the adjustment base 211, with the through holes located at the front and rear ends of the adjustment base 211.

[0040] In this invention, a soft pad 214 is installed inside the U-shaped groove 212, and adjacent through holes on the side of the adjusting base 211 are connected by a flexible hose 215. The flexible hose 215 is arranged in a serpentine shape, and the connection between the flexible hose 215 and the through hole is located on the left and right sides of the U-shaped groove 212.

[0041] Furthermore, before the patch component 2 comes into contact with the human body, the adjustment base 211 needs to be heated. Specifically, hot air is introduced into the hose 215. After the hot air is introduced into the hose 215, its heat is further transferred to the entire adjustment base 211 and the soft pad 214. The adjustment base 211 and the soft pad 214 are heated and their temperature rises. This helps to make the temperature of the adjustment base 211 and the soft pad 214 match the temperature of the human skin, thereby preventing the patient from feeling cold when wearing it and improving the comfort of wearing this product.

[0042] In this invention, a first substrate 23 extends outward from the lower surface of the adjustment component 21. The leftmost and rightmost sides of the first substrate 23 are provided with outwardly extending bases. A thin film 24 is connected between the bases. Two vent holes are opened on the side of the base. One vent hole is connected to an air inlet pipe 232, and the other vent hole is connected to an air outlet pipe 233. The two vent holes are not located on the same side.

[0043] Furthermore, the thin film 24 located below the adjusting component 21 has ventilation holes on its side connected to different air tubes on the first substrate 23. Specifically, the inlet tube 232 inputs gas, and the outlet tube 233 draws in gas. The rate at which gas is input through the inlet tube 232 is slightly less than the rate at which gas is drawn in through the outlet tube 233. This creates a low-pressure environment between the thin film 24 and the skin, achieving adhesion and thus fixing the patient's breast. It is important to emphasize that the first substrate 23 is made of flexible material. When the adjusting component 21 is displaced, the first substrate 23 can easily bend to accommodate the deformation of the adjusting component 21 and the thin film 24, thus adhering to and fixing the patient's breast.

[0044] Furthermore, since patients often need to lie still for 1-3 hours during radiotherapy, wearing the dressing component 2 and film 24 for a long time can easily cause skin itching. Therefore, fine holes are made in the film 24. The setting of air intake through one side vent and air exhaust through the other side promotes air circulation on the patient's skin surface. The air blowing in through the vent helps keep the patient's skin surface dry and can remove the sweat produced on the patient's skin surface. At the same time, it can also help prevent excessive suction from the other side vent tube 233, which would cause the film 24 and adjustment component 21 to compress the breast too tightly and cause pressure marks on the patient's skin surface.

[0045] In this invention, at least four second grooves 216 are provided on the front and rear end faces of the adjustment component 21. The second grooves 216 are symmetrically arranged on the upper and lower sides of the through hole. A connector 22 is provided in the second groove 216. The connector 22 includes two spherical bases 221. At most one spherical base 221 is provided in the second groove 216. The spherical bases 221 are connected to each other by a first spring 222.

[0046] Furthermore, since the adjustment components 21 are connected by connectors 22, when the air pump is activated to tighten the membrane 24, the adjustment components 21 connected to the membrane 24 are also subjected to the tightening force of the membrane 24 and thus displace and conform to the patient's chest shape. Specifically, the connector 22 is mainly composed of a spherical base 221 and a first spring 222 connected together, which are locked in the second groove 216. When the membrane 24 is subjected to air pressure and conforms to the patient's skin surface, the adjustment components 21 will also displace. The first spring 222 is stretched and compressed by the deformation of the membrane 24, which in turn drives the spherical base 221 connected to the end face of the first spring 222 to move left and right or up and down in the second groove 216. Through the connection and combination of the first spring 222, the spherical base 221 and the second groove 216, it is possible to ensure that the adjustment component 21 can accurately cover the patient's chest and play a fixing role. The vertical and horizontal stretching displacement achieved by the connection between the adjustment components 21 through the connector 22 can adapt to the patient's involuntary movement when lying down, avoiding affecting the fixing effect. The dressing component 2 can be used by a variety of people. On the other hand, the connector 22 can limit the position of the adjustment component 21. After use, the first spring 222 can return to its original state, which helps to improve the service life of the device.

[0047] Example 2:

[0048] The difference between this embodiment and Embodiment 1 is that, with reference to Appendix Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 In this invention, the surface of the first groove 111 is provided with two sliding grooves 13, each sliding groove 13 is provided with at least two limiting strips 131, and each sliding groove 13 is fitted with at most two sliding members 14. The height of the sliding member 14 does not exceed the depth of the sliding groove 13, and the sliding member 14 is fixedly connected to the sliding support plate 12 by bolts.

[0049] In this invention, at least two support frames 15 are provided on the sliding tray 12, the application component 2 is disposed between the support frames 15, and a head support 16 is provided on one side of the application component 2, and the head support 16 is fixedly connected to the sliding tray 12.

[0050] Furthermore, the patient lies on the follow-up support 11, with the upper body positioned on the sliding support 12, the head resting on the headrest 16, and the hands placed on the handrest 15. The sliding support 12 can passively follow the patient's unconscious movements, which is beneficial for the follow-up support 11 and the sliding support 12 to move with the patient during treatment, thus ensuring the fixation of the patient during treatment. Moreover, the sliding support 12 is connected to the sliding component 14 by bolts, which restricts the displacement of the sliding support 12 and prevents the sliding support 12 from sliding too much when the patient only slightly shakes their body.

[0051] In this invention, the sliding component 14 includes a rubber plate 141, at least four elastic columns 142 are connected to the rubber plate 141, and the other end of the elastic column 142 is connected to a cylindrical base block 143. The base block 143 has a central hole and a bearing ring 144 is provided inside the base block 143. A sleeve 145 is provided inside the bearing ring 144 and the sleeve 145 is fixedly connected to the sliding support plate 12 by bolts.

[0052] Furthermore, the side surface of the base block 143 is in contact with the limiting strip 131 in the slide groove 13, and the sleeve 145 on the inner side of the base block 143 is bolted. A bearing ring 144 is connected between the sleeve 145 and the inner wall of the base block 143. This design enables the patient to move involuntarily, thereby moving the sliding support plate 12. Specifically, the sliding support plate 12 is bolted to the sliding component 14. The movement of the sliding support plate 12 causes the sleeve 145 to move. A bearing ring 144 is provided between the base block 143 and the sleeve 145, allowing the base block 143 to rotate relative to the limiting strip 131. The rotation of the base block 143 causes the rubber plate 141 below to rotate as well.

[0053] Furthermore, since the patient's weight is applied to the sliding support 12 and the sliding member 14 when lying down, the limiting strip 131 prevents the sliding support 12 from slipping due to the inertial force generated when the patient first lies down. At the same time, the weight causes the elastic column 142 to compress. After compression, the elastic column 142 expands laterally, further reducing the gap between the elastic column 142 and the slide groove 13, thus creating contact. This increases the thrust required to drive the sliding member 14, thereby preventing the sliding support 12 from slipping due to the inertial force generated when the patient first lies down.

[0054] Furthermore, the sliding member 14 creates a certain gap between the sliding support plate 12 and the follower support 11. When the patient lies on the sliding support plate 12, the elastic column 142 is compressed, reducing the gap between the sliding support plate 12 and the follower support 11. This ensures uniform contact between the surfaces of the sliding support plate 12 and the follower support 11, preventing uneven contact that could lead to excessive local sliding friction. This improves the contact effect between the follower support 11 and the sliding support plate 12, and avoids localized wear on the surfaces of the follower support 11 or the sliding support plate 12 due to poor contact.

[0055] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A fixation device for breast cancer radiotherapy, comprising a follower bracket (11), wherein a first groove (111) is provided on the follower bracket (11), a sliding support plate (12) is installed on the first groove (111), and an application component (2) is provided in the middle of the sliding support plate (12), characterized in that, The dressing assembly (2) includes multiple adjustment assemblies (21), adjacent adjustment assemblies (21) are connected by connectors (22), and a film (24) is provided at the bottom of the adjustment assembly (21), and multiple fine pores are arranged on the surface of the film (24); The adjustment component (21) covers the patient's chest, and the adjustment components (21) are connected by connectors (22) to achieve vertical and horizontal stretching displacement; The adjustment component (21) includes an adjustment base (211), a U-shaped groove (212) is formed in the center of the adjustment base (211), and at least two through holes are provided on the side of the adjustment base (211), the through holes being provided at the front and rear ends of the adjustment base (211); A soft pad (214) is installed inside the U-shaped groove (212), and adjacent through holes are connected by a flexible hose (215). The flexible hose (215) is arranged in a serpentine shape, and the connection between the flexible hose (215) and the through hole is located on the left and right sides of the U-shaped groove (212). At least four second grooves (216) are provided on the front and rear end faces of the adjustment component (21). The second grooves (216) are symmetrically arranged on the upper and lower sides of the through hole. A connector (22) is provided in the second groove (216). The connector (22) includes two spherical bases (221). At most one spherical base (221) is provided in the second groove (216). The spherical bases (221) are connected to each other by a first spring (222).

2. The breast cancer radiotherapy fixation device according to claim 1, characterized in that, The lower surface of the adjustment component (21) extends outward with a first substrate (23), wherein the leftmost and rightmost sides of the first substrate (23) are provided with outward extending bases, and a thin film (24) is connected between the bases. Two ventilation holes are opened on the side of the base, one of which is connected to an air inlet pipe (232), and the other is connected to an air outlet pipe (233). The two ventilation holes are not on the same side.

3. The breast cancer radiotherapy fixation device according to claim 1, characterized in that, The surface of the first groove (111) is provided with two sliding grooves (13), each sliding groove (13) is provided with at least two limiting strips (131), and each sliding groove (13) is provided with at most two sliding parts (14). The height of the sliding parts (14) does not exceed the depth of the sliding groove (13), and the sliding parts (14) are fixedly connected to the sliding support plate (12) by bolts.

4. The breast cancer radiotherapy fixation device according to claim 3, characterized in that, At least two support brackets (15) are provided on the sliding tray (12), and the application component (2) is provided between the support brackets (15). A head support (16) is provided on one side of the application component (2), and the head support (16) is fixedly connected to the sliding tray (12).

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