Radioactive source cassette, radioactive source cassette fixing device and radiotherapy equipment

Abstract

The present invention relates to a radiation source cassette, a radiation source cassette fixing device and a radiotherapy device. A plurality of radiation sources are fixedly installed in the radiation source cassette, and a connection hole and a first fixing structure are provided on the radiation source cassette. The connection hole is used for connecting with a guide source tooling, and the first fixing structure is used for assembling and connecting with the radiation source cassette fixing device to fix the radiation source cassette on the radiation source cassette fixing device; the radiation source cassette fixing device includes a hollow part for placing the radiation source cassette and a connection part, and a second fixing structure is provided on the connection part, and the second fixing structure is assembled and connected with the first fixing structure of the radiation source cassette; the radiotherapy device includes a source carrier. The present invention not only makes the structures of the radiation source cassette and the radiation source cassette fixing device more concise and the installation faster; moreover, the radiation source cassette fixing device can accurately position a plurality of radiation sources in the radiation source cassette, avoiding multiple installations of the radiation sources and shortening the installation time.

Description

Technical Field

[0001] The present invention relates to the field of radioactive source applications, and particularly to a radioactive source cassette, a radioactive source cassette fixing device, and a radiotherapy device. Background Art

[0002] The radioactive source cassette is used to place radioactive sources such as cobalt-60. The half-life of cobalt-60 is 5.27 years, and it has extremely strong radiation. Therefore, the transportation, installation, and replacement of radioactive sources must be carried out in a shielding container, and the human body shall not directly contact them.

[0003] Currently, radiotherapy devices include a source carrier, and a plurality of radioactive source fixing holes are provided on the source carrier. The radioactive sources are fixedly installed on the source carrier through a robotic arm. Existing radiotherapy devices such as those of Elekta include 108 radioactive sources. Fixing the source carrier in this way of using a robotic arm requires installing each radioactive source in a radioactive source fixing hole, so the time for installing radioactive sources is long and the installation risk is relatively high. In addition, since each radioactive source is small, and the robotic arm picks and places the radioactive sources through manual operation, the difficulty of installing each radioactive source is high.

[0004] The present application provides a new technical solution.

[0005] It should be noted that this part aims to provide background or context for the embodiments of the present invention stated in the claims. The description herein is not admitted to be prior art merely because it is included in this part. Summary of the Invention

[0006] An object of the present invention is to provide a radioactive source cassette, a radioactive source cassette fixing device, and a radiotherapy device, so as to at least to some extent overcome one or more problems caused by the limitations and defects of related technologies.

[0007] According to a first aspect of an embodiment of the present invention, there is provided a radioactive source cassette, including:

[0008] A plurality of radioactive sources are fixedly installed in the radioactive source cassette, and a connection hole and a first fixing structure are provided on the radioactive source cassette, wherein,

[0009] The connection hole is used to connect with a source guiding tooling;

[0010] The first fixing structure is used to be assembled and connected with a radioactive source cassette fixing device to fix the radioactive source cassette on the radioactive source cassette fixing device.

[0011] In an embodiment of the present invention, the first fixing structure of the radioactive source cassette includes a first limiting groove provided on the radioactive source cassette, and the first limiting groove is assembled with the radioactive source cassette fixing device to prevent the radioactive source cassette from moving in a first direction.

[0012] In an embodiment of the present invention, the first fixing structure of the radiation source cartridge further includes a second limiting groove provided on the radiation source cartridge, and the second limiting groove is assembled with the radiation source cartridge fixing device to prevent the radiation source cartridge from moving in the second direction,

[0013] wherein, the first direction intersects with the second direction.

[0014] In an embodiment of the present invention, the first limiting groove or the second limiting groove is provided on opposite sides of the radiation source cartridge.

[0015] In an embodiment of the present invention, the first limiting groove and the second limiting groove are provided on the same side of the radiation source cartridge.

[0016] In an embodiment of the present invention, the first fixing structure includes at least one first limiting member, and the first limiting member is used for assembling with the radiation source cartridge fixing device to prevent the radiation source cartridge from moving in the first direction.

[0017] In an embodiment of the present invention, the first fixing structure further includes at least one second limiting member, and the second limiting member is used for assembling with the radiation source cartridge fixing device to prevent the radiation source cartridge from moving in the second direction,

[0018] wherein, the first direction intersects with the second direction.

[0019] In an embodiment of the present invention, the first limiting member is an elastic member.

[0020] In an embodiment of the present invention, the second limiting member is non-elastic.

[0021] In an embodiment of the present invention, the first limiting member or the second limiting member is provided on opposite sides of the radiation source cartridge.

[0022] In an embodiment of the present invention, the first limiting member and the second limiting member are provided on the same side of the radiation source cartridge.

[0023] In an embodiment of the present invention, the radiation source cartridge includes a housing and a cover plate. The radiation source is fixed on the housing, and after the cover plate is fixed to the housing, it is used to encapsulate the radiation source.

[0024] According to a second aspect of the embodiments of the present invention, there is provided a radiation source cartridge fixing device, including:

[0025] A hollow part for placing the radiation source cartridge and a connecting part. A second fixing structure is provided on the connecting part, and the second fixing structure is assembled and connected with the first fixing structure of the radiation source cartridge.

[0026] In an embodiment of the present invention, the second fixing structure includes at least one first limiting member, and the first limiting member is used for assembling with the first limiting groove of the radiation source cassette.

[0027] In an embodiment of the present invention, one end of the first limiting member extends and is located in the hollow part.

[0028] In an embodiment of the present invention, the second fixing structure further includes at least one second limiting member, and the second limiting member is used for assembling with the second limiting groove of the radiation source cassette.

[0029] In an embodiment of the present invention, one end of the second limiting member extends and is located in the hollow part.

[0030] In an embodiment of the present invention, the first limiting member is an elastic member.

[0031] In an embodiment of the present invention, the second fixing structure includes a first limiting groove, and the first limiting groove is assembled with the first limiting member of the radiation source cassette.

[0032] In an embodiment of the present invention, the second fixing structure of the radiation source cassette further includes a second limiting groove, and the second limiting groove is assembled with the second limiting member of the radiation source cassette.

[0033] According to the third aspect of the embodiments of the present invention, a radiotherapy device is provided, including any one of the above radiation source cassettes and any one of the above radiation source cassette fixing devices.

[0034] In an embodiment of the present invention, the radiotherapy device further includes a source carrier, and a third fixing structure is provided on the connecting portion for assembling and connecting with the source carrier.

[0035] The technical solutions provided by the embodiments of the present invention may include the following beneficial effects:

[0036] In one embodiment of the present invention, through the above-mentioned radiation source cassette, radiation source cassette fixing device and radiotherapy device, on the one hand, the structures of the radiation source cassette and the radiation source cassette fixing device are more streamlined and convenient for installation; on the other hand, the radiation source cassette fixing device can accurately position multiple radiation sources in the radiation source cassette, avoiding multiple installations of the radiation sources, and at the same time significantly shortening the installation time of the radiation sources. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 Shows a front view schematic diagram of a radiation source cassette in an exemplary embodiment of the present invention;

[0038] Figure 2 Shows a left view schematic diagram of a radiation source cassette in an exemplary embodiment of the present invention;

[0039] Figure 3Shows a top view schematic diagram of a radioactive source cassette fixing device in an exemplary embodiment of the present invention;

[0040] Figure 4 Shows a combined schematic diagram of a radioactive source cassette and a radioactive source cassette fixing device in an exemplary embodiment of the present invention;

[0041] Figure 5 Shows a front view schematic diagram of a radioactive source cassette in an exemplary embodiment of the present invention;

[0042] Figure 6 Shows a left view schematic diagram of a radioactive source cassette in an exemplary embodiment of the present invention;

[0043] Figure 7 Shows a top view schematic diagram of a radioactive source cassette in an exemplary embodiment of the present invention;

[0044] Figure 8 Shows a top view schematic diagram of a radioactive source cassette fixing device in an exemplary embodiment of the present invention;

[0045] Figure 9 Shows a side view schematic diagram of a radioactive source cassette fixing device in an exemplary embodiment of the present invention;

[0046] Figure 10 Shows a combined schematic diagram of a radioactive source cassette and a radioactive source cassette fixing device in an exemplary embodiment of the present invention;

[0047] Figure 11 Shows a top view schematic diagram of a radiotherapy device in an exemplary embodiment of the present invention. Detailed implementation manners

[0048] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this invention will be more complete and comprehensive, and will fully convey the concept of the example embodiments to those skilled in the art. The features, structures, or characteristics described may be combined in any suitable manner in one or more embodiments.

[0049] In addition, the drawings are only schematic illustrations of the present invention and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repeated description will be omitted. Some of the block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically independent entities.

[0050] In this example embodiment, a radioactive source cassette is first provided. Referring to Figures 1-4 as shown, in this radioactive source cassette, connection holes 105 and a first fixing structure 106 are provided on the radioactive source cassette.

[0051] The radiation source is fixedly installed in the radiation source cassette; the connection hole 105 is used for connecting with the radiation guiding tooling; the first fixing structure 106 is used for assembling and connecting with the radiation source cassette fixing device to fix the radiation source cassette on the following radiation source cassette fixing device.

[0052] The above-mentioned radiation source cassette provided by the embodiment of the present invention not only has a simple structure, can fix multiple radiation sources at one time inside the radiation source cassette, but also can improve the installation accuracy of the radiation source cassette through the assembly of the first fixing structure 106 of the radiation source cassette and the following radiation source cassette fixing device, and significantly shortens the installation time.

[0053] In this embodiment, as Figure 1 shown, the connection hole 105 is arranged on the cover plate 101 of the radiation source cassette and is used for connecting with the radiation guiding tooling. When the radiation source cassette is lifted from the source transport tank to the source taking chamber in the radiation guiding tooling, the radiation guiding tooling is connected to the connection hole 105 on the cover plate 101 of the radiation source cassette, and the radiation source cassette is moved to the radiotherapy equipment through the radiation guiding channel. Of course, the connection hole 105 can also be arranged at other positions of the radiation source cassette, such as on the top of the radiation source cassette. The present application does not limit the specific position of the connection hole, and only takes the above as an example for illustration.

[0054] In this embodiment, as Figure 2 shown, the first fixing structure 106 of the radiation source cassette includes a first limiting groove 104 arranged on the radiation source cassette, and the first limiting groove 104 is assembled with the radiation source cassette fixing device to prevent the radiation source cassette from moving in the first direction.

[0055] Specifically, the first direction is the direction shown by the Y-axis in the figure; the first limiting groove 104 can be set as a V-shaped groove. When the radiation source cassette moves towards the hollow part 207 of the following radiation source cassette fixing device, the first limiting member 206 arranged in the following radiation source cassette fixing device is clamped in the first limiting groove 104, so as to effectively prevent the radiation source cassette from moving in the first direction, that is, prevent the radiation source cassette from moving in the Y-axis direction. For example, the bottom peripheral edge of the radiation source cassette housing 102 is chamfered, providing a buffer for the first limiting member 206 in the following radiation source cassette fixing device to be inserted into the first limiting groove 104.

[0056] In this embodiment, as Figure 2 shown, the first fixing structure 106 of the radiation source cassette further includes a second limiting groove 103 arranged on the radiation source cassette, and the second limiting groove 103 is assembled with the radiation source cassette fixing device to prevent the radiation source cassette from moving in the second direction, wherein the first direction intersects with the second direction.

[0057] Specifically, the second direction is the direction shown by the X-axis in the figure; the second limiting groove 103 communicates with the bottom of the radioactive source cartridge housing 102, facilitating the entry of the second limiting member 205 in the following radioactive source cartridge fixing device into the second limiting groove 103. When the radioactive source cartridge moves downward into the hollow part 207 of the following radioactive source cartridge fixing device, the second limiting member 205 provided in the following radioactive source cartridge fixing device enters the second limiting groove 103, thereby effectively preventing the radioactive source cartridge from moving in the second direction, that is, preventing the radioactive source cartridge from moving along the X-axis direction, and the first direction intersects with the second direction, that is, the above-mentioned Y-axis intersects with the X-axis. Exemplarily, the edge of the second limiting groove 103 is chamfered, providing a buffer for the second limiting member 205 in the following radioactive source cartridge fixing device to enter the second limiting groove 103.

[0058] In this embodiment, as Figure 1 , 2 shown, the first limiting groove 104 or the second limiting groove 103 is provided on opposite sides of the radioactive source cartridge. Exemplarily, it can be that the first limiting groove 104 and the second limiting groove 103 are provided on different opposite sides of the radioactive source cartridge. For example, referring to Figure 1 shown, the first limiting groove 104 can be provided on both sides of the radioactive source cartridge along the width direction, and the second limiting groove 103 can be provided on both sides of the radioactive source cartridge along the length direction. Of course, it can also be as Figure 2 shown, the first limiting groove 104 and the second limiting groove 103 are provided on the same side of the radioactive source cartridge.

[0059] Specifically, the first limiting groove 104 is provided on the two side walls of the radioactive source cartridge along the width direction and is symmetrically arranged; and the second limiting groove 103 is also provided on the two side walls of the radioactive source cartridge along the width direction and is symmetrically arranged. That is, both the first limiting groove 104 and the second limiting groove 103 are provided on any one side wall of the radioactive source cartridge along the width direction.

[0060] In this embodiment, as Figures 1-3 shown, the radioactive source cartridge includes a housing 102 and a cover plate 101. The radioactive source is fixed on the housing 102, and the cover plate 101 is fixed to the housing 102 for encapsulating the radioactive source.

[0061] In another embodiment, as Figures 5-10 shown, the first fixing structure 106 includes at least one first limiting member 302, and the first limiting member 302 is used for assembling with the radioactive source cartridge fixing device to prevent the radioactive source cartridge from moving in the first direction.

[0062] Specifically, the first direction is the direction shown by the Y-axis in the figure; at least one first limiting member 302 is provided on the side wall of the radiation source cassette in the width direction. In this embodiment, it can be specifically set to 4 first limiting members 302, that is, 2 first limiting members 302 are provided on one side wall in the width direction. The first limiting member 302 is used for when the radiation source cassette moves downward into the hollow part 207 of the following radiation source cassette fixing device, to be clamped with the first limiting groove 402 provided in the following radiation source cassette fixing device, thereby effectively preventing the radiation source cassette from moving in the first direction, that is, preventing the radiation source cassette from moving in the Y-axis direction.

[0063] In this embodiment, as Figures 5-7 shown, the first fixing structure 106 further includes at least one second limiting member 301. The second limiting member 301 is used for assembling with the radiation source cassette fixing device to prevent the radiation source cassette from moving in the second direction, wherein the first direction intersects with the second direction.

[0064] Specifically, the second direction is the direction shown by the X-axis in the figure; at least one second limiting member 301 is provided on the side wall of the radiation source cassette in the width direction. In this embodiment, it can be specifically set to 4 second limiting members 301, that is, 2 second limiting members 301 are provided on one side wall in the width direction. The second limiting member 301 is used for when the radiation source cassette moves downward into the hollow part 207 of the following radiation source cassette fixing device, to enter the second limiting groove 401 provided in the following radiation source cassette fixing device, thereby effectively preventing the radiation source cassette from moving in the second direction, that is, preventing the radiation source cassette from moving in the X-axis direction. And the first direction intersects with the second direction, that is, the above-mentioned Y-axis intersects with the X-axis.

[0065] In this embodiment, the first limiting member 302 is an elastic member. The second limiting member 301 is a non-elastic member.

[0066] Specifically, the first limiting member 302 is an elastic member. The purpose is that when the first limiting member 302 moves downward with the radiation source cassette into the hollow part 207 of the following radiation source cassette fixing device, the first limiting member 302 needs to first pass through the side wall where the first limiting groove 402 provided in the following radiation source cassette fixing device is located. At this time, the first limiting member 302 can be contracted through the spring provided inside it. When reaching the position where the first limiting groove 402 is located, the first limiting member 302 returns to its original length, thereby being clamped with the first limiting groove 402. The second limiting member 301 needs to enter the second limiting groove 401 through the notch of the second limiting groove 401 provided in the following radiation source cassette fixing device. Therefore, in order to enable the first limiting member 302 to accurately enter the second limiting groove 401, the first limiting member 302 is set as a non-elastic member.

[0067] In this embodiment, the first limiting member 302 and the second limiting member 301 are arranged on opposite sides of the radiation source cassette. The first limiting member 302 and the second limiting member 301 are arranged on the same side of the radiation source cassette.

[0068] Specifically, the first limiting member 302 is arranged on both side walls of the radiation source cassette along the width direction and is symmetrically arranged; and the second limiting member 301 is also arranged on both side walls of the radiation source cassette along the width direction and is symmetrically arranged. That is, both the first limiting member 302 and the second limiting member 301 are provided on any one side wall of the radiation source cassette along the width direction.

[0069] In this embodiment, as Figure 6 shown, the radiation source cassette includes a housing 102 and a cover plate 101. The radiation source is fixed on the housing 102, and after the cover plate 101 is fixed to the housing 102, it is used to encapsulate the radiation source.

[0070] In this exemplary embodiment, a radiation source cassette fixing device is also provided for fixing any of the above radiation source cassettes. Referring to Figures 1-4 shown in, the radiation source cassette fixing device includes: a hollow portion 207, a connecting portion 202, and a second fixing structure 208. The hollow portion 207 is used to place the above radiation source cassette. A second fixing structure 208 is provided on the connecting portion 202, and the second fixing structure 208 is assembled and connected with the first fixing structure 106 of the radiation source cassette.

[0071] The radiation source cassette fixing device provided by the embodiment of the present invention not only has a simple structure and fast installation, but also can be quickly configured with the above radiation source cassette, saving time for the installation of the cobalt source cassette.

[0072] Specifically, the radiation source cassette fixing device is composed of a hollow portion 207 and a connecting portion 202. By way of example, referring to Figure 3 shown, the hollow portion 207 is located between the connecting portions 202, and the connecting portions 202 are symmetrically arranged left and right; the second fixing structure 208 is provided on the connecting portion 202.

[0073] In this embodiment, as Figure 3 shown, the second fixing structure 208 includes at least one first limiting member 206, and the first limiting member 206 is used to be assembled with the first limiting groove 402 of the radiation source cassette. One end of the first limiting member 206 extends out and is located in the hollow portion 207.

[0074] Specifically, one end of the first limiting member 206 is located inside the connecting portion 202, and the other end extends out and is located in the hollow portion 207. When the above-mentioned radiation source cassette moves towards the hollow portion 207 of the radiation source cassette fixing device through the guiding tooling, the first limiting member 206 first passes through the chamfer on the bottom surface of the radiation source cassette housing 102, compresses the first limiting member 206 through the internally provided spring, then passes through the side wall of the radiation source cassette in the width direction, and finally snaps into the first limiting groove 104 provided on the radiation source cassette, thereby effectively preventing the radiation source cassette from moving in the Y-axis direction. It should be noted that in this example, the first limiting member 206 can be set to 4, that is, 2 are symmetrically arranged on one side of the connecting portion 202.

[0075] In this embodiment, as Figure 3 shown, the second fixing structure 208 further includes at least one second limiting member 205, and the second limiting member 205 is used for assembling with the second limiting groove 103 of the radiation source cassette. One end of the second limiting member 205 extends out and is located in the hollow portion 207.

[0076] Specifically, one end of the second limiting member 205 is located inside the connecting portion 202, and the other end extends out and is located in the hollow portion 207. When the above-mentioned radiation source cassette moves towards the hollow portion 207 of the radiation source cassette fixing device through the guiding tooling, the second limiting member 205 enters the second limiting groove 103 through the buffering of the chamfer on the edge of the second limiting groove 103 on the radiation source cassette, which can effectively prevent the radiation source cassette from moving in the X-axis direction. It should be noted that in this example, the first limiting member 206 can be set to 4, that is, 2 are symmetrically arranged on one side of the connecting portion 202.

[0077] In this embodiment, the first limiting member 206 is an elastic member.

[0078] Specifically, one end of the first limiting member 206 is located inside the connecting portion 202, and the other end extends out and is located in the hollow portion 207. When the above-mentioned radiation source cassette moves towards the hollow portion 207 of the radiation source cassette fixing device through the guiding tooling, the first limiting member 206 first passes through the chamfer on the bottom surface of the radiation source cassette housing 102, compresses the first limiting member 206 through the internally provided spring, then passes through the side wall of the radiation source cassette in the width direction, and finally snaps into the first limiting groove 104 provided on the radiation source cassette. Therefore, the first limiting member 206 must be set as an elastic member to achieve the above purpose.

[0079] In another embodiment, as Figures 5-10 shown, the second fixing structure 208 includes a first limiting groove 402, and the first limiting groove 402 is assembled with the first limiting member 206 of the radiation source cassette.

[0080] Specifically, first limiting grooves 402 are symmetrically arranged on both side walls of the hollow part 207 at the connecting part 202. The axial direction of the first limiting grooves 402 is the X-axis direction. The limiting grooves are used to clamp the first limiting members 302 arranged on the above-mentioned radiation source cartridge to prevent the above-mentioned radiation source cartridge from moving along the Y-axis direction.

[0081] In this embodiment, the second fixing structure 208 of the radiation source cartridge further includes a second limiting groove 401, and the second limiting groove 401 is assembled with the second limiting member 301 of the radiation source cartridge.

[0082] Specifically, second limiting grooves 401 are symmetrically arranged on both side walls of the hollow part 207 at the connecting part 202. One opening of the second limiting grooves 401 communicates with the upper end of the connecting part 202, so that the second limiting members 301 arranged on the above-mentioned radiation source cartridge can enter the second limiting grooves 401. And the axial direction of the second limiting grooves 401 is the Y-axis direction, and part of them coincides with the first limiting grooves 402. The setting of the second limiting grooves 401 effectively prevents the above-mentioned radiation source cartridge from moving along the X-axis direction.

[0083] Another exemplary embodiment also protects a radiotherapy device, which includes any one of the above-mentioned radiation source cartridges and any one of the radiation source cartridge fixing devices.

[0084] In this embodiment, the radiotherapy device further includes a source carrier 502, and a third fixing structure 501 is arranged on the connecting part 202 for assembling and connecting with the source carrier 502.

[0085] Specifically, the source carrier 502 is arranged on the radiotherapy device for placing the above-mentioned radiation source cartridge and the radiation source cartridge fixing device. A third fixing structure 501 is arranged on the connecting part 202. The third fixing structure 501 mainly refers to a threaded hole arranged on the connecting part 202, and the connecting part 202 and the source carrier 502 are fixedly connected by screws.

[0086] A radiation source cartridge, a radiation source cartridge fixing device and a radiotherapy device provided by an embodiment of the present invention, on the one hand, make the structures of the radiation source cartridge and the radiation source cartridge fixing device more concise and the installation more convenient; on the other hand, the radiation source cartridge fixing device can accurately position multiple radiation sources in the radiation source cartridge, avoiding multiple installations, and significantly shortening the installation time of the radiation sources.

[0087] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0088] In addition, the terms "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0089] In the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected", "coupled", "fixed", etc. should be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. 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.

[0090] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "under" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0091] In the description of the present specification, the descriptions referring to terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0092] Other embodiments of the present invention will be readily apparent to those skilled in the art after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present invention, which follow the general principles of the present invention and include known common knowledge or conventional technical means in the technical field not disclosed by the present invention. The specification and examples are only regarded as exemplary, and the true scope and spirit of the present invention are pointed out by the appended claims.

Claims

1. A radioactive source cassette, characterized in that, A plurality of radiation sources are fixedly installed in the radiation source cassette, and a connection hole and a first fixing structure are provided on the radiation source cassette. Among them, the connection hole is used for connecting with a radiation source guiding tool; the first fixing structure is used for assembling and connecting with a radiation source cassette fixing device to fix the radiation source cassette on the radiation source cassette fixing device; wherein, the first fixing structure is one of the following two: Alternatively, the first fixing structure includes a first limiting groove provided on the radiation source cassette. The first limiting groove is assembled with the radiation source cassette fixing device to prevent the radiation source cassette from moving in a first direction. The first fixing structure of the radiation source cassette further includes a second limiting groove provided on the radiation source cassette. The second limiting groove is assembled with the radiation source cassette fixing device to prevent the radiation source cassette from moving in a second direction. The second limiting groove communicates with the bottom of the radiation source cassette housing. The first direction intersects with the second direction. When the radiation source cassette moves towards the hollow part of the radiation source cassette fixing device, a second limiting member provided in the radiation source cassette fixing device enters the second limiting groove; Alternatively, the first fixing structure includes at least one first limiting member for assembling with the radiation source cassette fixing device to prevent the radiation source cassette from moving in a first direction. The first fixing structure further includes at least one second limiting member for assembling with the radiation source cassette fixing device to prevent the radiation source cassette from moving in a second direction. The first direction intersects with the second direction. When the radiation source cassette moves towards the hollow part of the radiation source cassette fixing device, the second limiting member enters a second limiting groove provided in the radiation source cassette fixing device.

2. The radioactive source cassette according to claim 1, characterized in that, The first limiting groove or the second limiting groove is provided on opposite sides of the radiation source cassette.

3. The radioactive source cassette according to claim 2, wherein The first limiting groove and the second limiting groove are provided on the same side of the radiation source cassette.

4. The radioactive source cassette according to claim 1, wherein, The first limiting member is an elastic member.

5. The radioactive source cassette according to claim 4, wherein, The second limiting member is a non-elastic member.

6. The radioactive source cassette according to claim 5, characterized in that, The first limiting member or the second limiting member is provided on opposite sides of the radiation source cassette.

7. The radioactive source cassette according to claim 6, wherein, The first limiting member and the second limiting member are provided on the same side of the radiation source cassette.

8. The radioactive source cassette according to claim 1, wherein, The radiation source cassette includes a housing and a cover plate. The radiation source is fixed on the housing, and after the cover plate is fixed to the housing, it is used to encapsulate the radiation source.

9. A fixing device for a radiation source cassette, characterized in that, A fixing device for fixing the radiation source cassette according to any one of claims 1 to 8, the fixing device includes: a hollow part for placing the radiation source cassette and a connecting part. A second fixing structure is provided on the connecting part, and the second fixing structure is assembled and connected with the first fixing structure of the radiation source cassette.

10. The radioactive source cassette fixing device according to claim 9, characterized in that, The second fixing structure includes at least one first limiting member for assembling with the first limiting groove of the radiation source cassette.

11. The radioactive source cassette fixing device according to claim 9, characterized in that, One end of the first limiting member extends out and is located in the hollow part.

12. The radioactive source cassette fixing device according to claim 9, characterized in that, The second fixing structure further includes at least one second limiting member for assembling with the second limiting groove of the radiation source cassette.

13. The radioactive source cassette fixing device according to claim 12, wherein One end of the second limiting member extends out and is located in the hollow part.

14. The radioactive source cassette fixing device according to any one of claims 10 or 12, characterized in that, The first limiting member is an elastic member.

15. The radioactive source cassette fixing device according to claim 9, wherein, The second fixing structure includes a first limiting groove for assembling with the first limiting member of the radiation source cassette.

16. The radioactive source cassette fixing device according to claim 9, wherein The second fixing structure of the radiation source cassette further includes a second limiting groove, and the second limiting groove is assembled with the second limiting member of the radiation source cassette.

17. A radiotherapy device, characterized in that, It includes the radiation source cassette according to any one of claims 1-8 and the radiation source cassette fixing device according to any one of claims 9-16.

18. The radiotherapy device according to claim 17, wherein, The radiotherapy device further includes a source carrier, and a third fixing structure is provided on the connecting portion for assembling and connecting with the source carrier.

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