A source storage device, a source guiding system and a source guiding method

Abstract

The present disclosure relates to a source storage device, which includes a source storage tank and a shielding plug. An opening and a receiving cavity are provided on the source storage tank. The receiving cavity is used to accommodate a cobalt source cassette, and the shielding plug is used to close the opening of the receiving cavity. Wherein, a first connection structure is provided on the cobalt source cassette; a second connection structure is provided on the outer side of the shielding plug, and a picking structure is provided on the inner side. The first connection structure and the picking structure are detachably connected. Through the above-mentioned radioactive source guiding system and method, the structure of the guiding tooling is simplified, the installation operation process is simple, the operation requirements are reduced, time and labor are saved, and the cost of the guiding tooling is also greatly reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of radiotherapy technology, and in particular, to a source storage device, a source guiding system, and a source guiding method. Background Art

[0002] Currently, for radiotherapy equipment that uses a radioactive source cassette, such as a cobalt source cassette, a common source replacement method is usually to assemble a source guiding tool outside the radiotherapy equipment for loading the radioactive source.

[0003] Since the radioactive source is radioactive, it is stored in a source storage tank during transportation, and the source storage tank is used to shield it. When loading the source, it is necessary to use a tool to first remove the shielding plug of the source storage tank, and at the same time, ensure the shielding of the source storage tank, and then remove the radioactive source in a shielding environment. Since in this process, it is necessary to perform comprehensive ray shielding, the current source guiding tool has a complex structure, resulting in a complex installation operation process, high operation requirements, and time-consuming and laborious. Therefore, it is necessary to provide a new technical solution to improve one or more problems existing in the above solution.

[0004] It should be noted that this part is intended to provide background or context for the embodiments of the present disclosure 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

[0005] The purpose of the present disclosure is to provide a source storage device, a source guiding system, and a source guiding method, so as to at least overcome one or more problems caused by the limitations and defects of related technologies to a certain extent.

[0006] According to the first aspect of the embodiments of the present disclosure, a source storage device is provided, including: a source storage tank and a shielding plug. An opening and a receiving cavity are provided on the source storage tank. The receiving cavity is used to accommodate a cobalt source cassette, and the shielding plug is used to close the opening of the receiving cavity; wherein,

[0007] A first connection structure is provided on the cobalt source cassette;

[0008] A second connection structure is provided on the outer side of the shielding plug, and a picking structure is provided on the inner side. The first connection structure and the picking structure are detachably connected.

[0009] The present application also provides a source guiding system for guiding a cobalt source cassette from a first source storage device to a second source storage device, wherein the first source storage device or the second source storage device is the source storage device provided by the present application; the cobalt source cassette further includes a third connection structure;

[0010] The system includes: a source guiding tank, which includes a tank body, a first pull rod and a first opening, and a second pull rod and a second opening. Among them, the tank body includes a source carrying cavity. The first pull rod and the first opening are located on opposite sides of the source carrying cavity along a first direction, and the second pull rod and the second opening are located on opposite sides of the source carrying cavity along a second direction. The first pull rod moves along the first direction and can be connected to a second connection structure of the shielding plug of the first source storage device; the second pull rod moves along the second direction and can be connected to a third connection mechanism of the cobalt source cassette.

[0011] This application also provides a source guiding method, which is applied to any of the source guiding systems provided in this application and is used to introduce the cobalt source cassette from the source storage device into the radiotherapy device. The method includes:

[0012] Connect the first connection structure of the cobalt source cassette to the picking structure of the shielding plug of the source storage device;

[0013] Drive the first pull rod to connect it to the second connection structure of the shielding plug of the source storage device and lift the shielding plug to the source carrying cavity of the source guiding tank;

[0014] Drive the second pull rod to connect it to the third connection structure of the cobalt source cassette;

[0015] Drive the first pull rod and the second pull rod to cooperate so that the first connection structure of the cobalt source cassette is separated from the picking structure;

[0016] Drive the second pull rod to send the cobalt source cassette into the radiotherapy device and fix it to the radiotherapy device.

[0017] This application also provides a source guiding method, which is applied to the source guiding system provided in this application and is used to introduce the cobalt source cassette from the radiotherapy device into the source storage device. The method includes:

[0018] Drive the first pull rod to connect it to the second connection structure of the shielding plug of the source storage device and lift the shielding plug to the source carrying cavity of the source guiding tank;

[0019] Drive the second pull rod to connect it to the third connection structure of the cobalt source cassette and pull the cobalt source cassette to the source carrying cavity of the source guiding tank;

[0020] Drive the first pull rod and the second pull rod to cooperate so that the first connection structure of the cobalt source cassette is connected to the picking structure;

[0021] Drive the second pull rod to separate it from the cobalt source cassette;

[0022] Drive the first pull rod to send the cobalt source cassette into the source storage device.

[0023] The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects:

[0024] A source storage device, a source guiding system and a source guiding method provided by the present disclosure. The source storage device includes: a source storage tank and a shielding plug. A picking structure is arranged on the shielding plug, and a first connection structure is arranged on the cobalt source cassette. Thus, the cobalt source cassette can be connected to the shielding plug through the first connection structure and the picking structure, so that during the process of replacing the source, the shielding plug and the cobalt source cassette can be taken out at one time, simplifying the operating device and operating steps and improving the operating safety. Through the above-mentioned radioactive source guiding system and method, the structure of the source guiding tooling is simplified, the installation operation process is simple, the operation requirements are reduced, time and labor are saved, and the cost of the source guiding tooling is also greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 FIG. is a schematic diagram of a source storage device according to the present disclosure;

[0026] Figure 2 FIG. is a schematic structural diagram of a picking device according to the present disclosure;

[0027] Figure 3 FIG. is a schematic diagram of a connection structure of a cobalt source cassette according to the present disclosure;

[0028] Figure 4 FIG. is a schematic diagram of the connection between a picking structure and a cobalt source cassette according to the present disclosure;

[0029] Figure 5 FIG. is a schematic diagram of a connection structure of a cobalt source cassette according to the present disclosure;

[0030] Figure 6 FIG. is a schematic diagram of a source guiding system according to the present disclosure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] 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 disclosure will be more complete and comprehensive, and will fully convey the concept of the example embodiments to those skilled in the art. The described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0032] In addition, the drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus repeated descriptions thereof 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.

[0033] The present application discloses a source storage device 10. By way of example, with reference to Figure 1As shown in the figure, it includes a source storage tank 11 and a shielding plug 12. An opening and a receiving cavity 14 are provided on the source storage tank 11. The receiving cavity 14 is used to accommodate the cobalt source cassette 15, and the shielding plug 12 is used to close the opening of the receiving cavity 14. Among them, a first connection structure 151 is provided on the cobalt source cassette 15; a second connection structure 121 is provided on the outer side of the shielding plug 12, and a picking structure 122 is provided on the inner side. The first connection structure 151 and the picking structure 122 are detachably connected.

[0034] Exemplarily, in the present application, the first connection structure and the picking structure are detachably connected, which can be through threaded connection or through snap connection. The present application does not limit its specific structure and connection method. In the present application, a second connection structure is provided on the outer side of the shielding plug, and the second connection structure can be connected to the pull rod of the source guiding system, so that the shielding plug and the cobalt source cassette can be taken out simultaneously through the pull rod of the source guiding system. The present application does not limit the connection method between the second connection structure and the pull rod. For example, it can also be threaded connection or snap connection.

[0035] For a source storage device provided by the present application, a picking structure is provided on the shielding plug, and a first connection structure is provided on the cobalt source cassette. Then, the cobalt source cassette can be connected to the shielding plug through the first connection structure and the picking structure, so that during the source replacement process, the shielding plug and the cobalt source cassette can be taken out at one time, simplifying the operation device and operation steps and improving operation safety. The source storage device of the present application can be, for example, a source storage tank.

[0036] For the source storage device provided by the present application, exemplarily, refer to Figure 2 As shown in the figure, the picking structure 122 includes an elastic member 1221, and the elastic member 1221 is snap-connected inside the first connection structure to realize the connection between the cobalt source cassette and the shielding plug. The picking structure includes an elastic member, so that by applying an external force, the elastic member can be snap-connected, facilitating the connection operation between the picking structure and the first connection structure. The present application does not limit the specific structure of the elastic member, and only takes the one shown in Figure 2 As an example for illustration. And multiple elastic members can be provided, for example, three or four.

[0037] Exemplarily, for the source storage device provided by the present application, the picking structure 122 is directly fixedly connected to the shielding plug 12. Or, the picking structure 122 is connected to the shielding plug 12 through a connecting rod. When the picking structure is directly fixed on the shielding plug, the space of the picking structure can be reduced. The connection between the picking structure and the shielding plug can be determined according to the specific setting of the source storage device, and the present application does not limit it.

[0038] For a source storage device provided by the present application, refer to Figure 3 As shown in the figure, the first connection structure 151 is a connection groove. Refer to Figure 4 As shown in the figure, the picking structure 122 can be snap-connected inside the connection groove 151. Specifically, the elastic member 1221 can be snap-connected inside the connection groove.

[0039] Schematic diagram of a cobalt source cassette provided by the present application. The connection slot of the cobalt source cassette includes a first opening and a second opening that are communicated. The first opening is located in a first direction (such as the X direction), and the second opening is located in a second direction (such as the Y direction). Refer to Figure 5 As shown, the first opening can be the top opening of the cobalt source cassette, and the second opening is the opening on the side of the cobalt source cassette. Then the picking structure can extend into the connection slot from the first opening and be snap-connected to the connection slot, and disengage from the connection slot from the second opening. It should be noted that Figure 5 only the connection slot of the cobalt source cassette is illustrated, and other structures of the cobalt source cassette are not shown.

[0040] The source storage device provided by the present application, refer to Figure 3 As shown, the connection slot 151 includes a card slot 1511 and a compression slot 1512. The maximum dimension of the card slot 1511 is greater than the first opening. The picking structure is an elastic member, and the dimension of the card slot can be greater than or equal to the maximum dimension of the elastic member when it is not compressed, so that the elastic member can be snapped into the card slot.

[0041] Exemplarily, when the picking structure includes an elastic member, the first opening is greater than the minimum compression dimension of the elastic member and less than the maximum extension dimension of the elastic member. So that the elastic member can enter the connection slot from the first opening and prevent the elastic member from disengaging from the first opening. Exemplarily, the maximum dimension of the card slot is greater than the maximum extension dimension of the elastic member, so as to more advantageously achieve snap connection. Exemplarily, the maximum dimension of the compression slot is less than the maximum extension dimension of the elastic member, so that the elastic member can be compressed at the compression slot position and disengage from the second opening.

[0042] In the present application, in order to prevent the picking device from disengaging from the cobalt source cassette, the bottom dimension of the second opening is greater than the top dimension of the second opening, and the maximum opening dimension of the second opening is not less than the minimum compression dimension of the picking structure.

[0043] In order to more advantageously compress the elastic member at the second opening so that the picking device can disengage, in the present application, the dimension of the second opening at the position corresponding to the compression slot is not less than the minimum compression dimension of the picking structure.

[0044] The present application provides a source guiding system for guiding a cobalt source cassette from a first source storage device to a second source storage device. Among them, the first source storage device or the second source storage device is the source storage device provided by the present application; among them, the first source storage device can be the source storage device provided by the present application, and the second source storage device can be a radiotherapy device. Then, guiding the cobalt source cassette from the first source storage device to the second source storage device means loading the radiation source into the radiotherapy device; or, the first source storage device is a radiotherapy device, and the second source storage device is the source storage device provided by the present application. Then, guiding the cobalt source cassette from the first source storage device to the second source storage device means taking out the radiation source from the radiotherapy device and loading it into the source storage tank. The present application takes the first source storage device as the source storage device provided by the present application, such as a source storage tank, and the second source storage device as a radiotherapy device as an example for illustration.

[0045] The system includes: a source guiding tank 20. Refer to Figure 6 As shown, the source guiding tank 20 includes a tank body 21, a first pull rod 31 and a first opening 211, a second pull rod 32 and a second opening 212. Among them, the tank body 21 includes a source loading cavity 213. The first pull rod 31 and the first opening 211 are located on opposite sides of the source loading cavity 213 along a first direction (i.e., Figure 6 the X direction shown), and the second pull rod 31 and the second opening 212 are located on opposite sides of the source loading cavity 213 along a second direction (i.e., Figure 6 the Z direction shown). The first pull rod 31 moves along the first direction and can be connected to a second connection structure of the shielding plug 12 of the first source storage device 10. For the source guiding system provided by the present application, the cobalt source cassette further includes a third connection structure; the second pull rod 31 moves along the second direction and can be connected to a third connection mechanism of the cobalt source cassette 15.

[0046] For the source guiding system provided by the present application, if the first opening corresponds to the position of the first source storage device, the shielding plug can be connected through the first pull rod. The shielding plug can be connected to the cobalt source cassette. Then, pulling up the first pull rod can pull out the shielding plug and the cobalt source cassette together so that they are located in the source loading cavity of the source guiding tank. The second opening corresponds to the source loading port of the radiotherapy device. After connecting the second pull rod to the cobalt source cassette and then disconnecting the shielding plug from the cobalt source cassette, the cobalt source cassette is sent into the radiotherapy device by using the second pull rod, thereby completing the source loading process.

[0047] Similarly, when it is necessary to take out the cobalt source cassette from the radiotherapy device, it can be that after connecting the second pull rod to the cobalt source cassette first, the cobalt source cassette is located in the source loading cavity of the source guiding tank, then the cobalt source cassette is connected to the shielding plug, and it is loaded into the first source storage device through the first pull rod, and then the first pull rod is disconnected from the shielding plug to complete the source removal process.

[0048] Exemplarily, the connection between the cobalt source cassette and the shielding plug can be disconnected. Reference can be made to the source storage device provided in this application, which can be provided with a pickup device on the shielding plug. The pickup device includes an elastic member that is snap-fitted with the connection groove on the cobalt source cassette. Specifically, reference can be made to Figure 5 , Figure 6 As shown, when driving the first pull rod to move the shielding plug downward in the X direction, the elastic member snaps into the connection groove of the cobalt source cassette, thereby realizing the connection between the shielding plug and the cobalt source cassette. Connect the second pull rod to the cobalt source cassette. When the shielding plug continues to move downward in the X direction, the elastic member is compressed at the compression groove position. At this time, by driving the second pull rod to move outward, the elastic member can be separated from the cobalt source cassette through the second opening, and then the cobalt source cassette can be sent into the radiotherapy device through the second pull rod. The principle of the source removal process is the same as that of the source loading process and will not be elaborated here.

[0049] The source guiding system provided in this application includes the source storage device provided in this application. It can cooperate with the source guiding tank to realize the disassembly and assembly of the radiation source, and no other shielding devices are required during the disassembly and assembly process, simplifying the disassembly and assembly process of the radiation source and improving the safety of the disassembly and assembly of the radiation source.

[0050] Exemplarily, in this application, the first direction is perpendicular to the second direction.

[0051] The source guiding system provided in this application further includes a first shielding door for opening and closing the first opening; and / or, the source guiding system further includes a second shielding door for opening and closing the second opening.

[0052] Specifically, the source guiding system can only include the first shielding door, or the source guiding system can only include the second shielding door, or the source guiding system can also include both the first shielding door and the second shielding door. The source guiding system including the shielding door can further improve the shielding safety of the source guiding system.

[0053] In the source guiding system provided in this application, limiting grooves are provided on the first pull rod and / or the second pull rod. The source guiding system further includes a fixing member that can be fixed to the limiting grooves to prevent the first pull rod and / or the second pull rod from rotating. For example, a limiting groove is provided on the first pull rod. After the first pull rod lifts the shielding plug and the cobalt source cassette to the source loading cavity, the fixing member is inserted into the limiting groove to prevent the shielding plug and the cobalt source cassette from rotating in the source loading cavity, facilitating the connection of the second pull rod to the cobalt source cassette.

[0054] In the source guiding system provided in this application, a glass window is provided on the source guiding tank; or, a camera and / or a detection lamp are further provided in the source loading cavity of the source guiding tank. This is to facilitate the operator to see the inside of the source loading cavity from the outside, so as to adjust the position of the pull rod to achieve connection or disassembly, etc.

[0055] Exemplarily, in the source guiding system of this application, the source guiding tank includes multiple components that are fixedly connected. For example, the source guiding tank includes a source guiding shielding body and a shielding cover, which is beneficial to the processing and transportation of the source guiding tank.

[0056] A source guiding method provided in this application is applied to the source guiding system provided in this application and is used to import a cobalt source cassette from a source storage device into a radiotherapy device. That is, the first source storage device is the source storage device provided in this application, and the second source storage device is the radiotherapy device. That is, the cobalt source cassette is imported from the first source storage device into the second source storage device, that is, the radiation source is loaded into the radiotherapy device. The method includes:

[0057] Step 101: Connect the first connection structure of the cobalt source cassette to the pickup structure of the shielding plug of the source storage device. Among them, step 101 can be implemented by other means, such as connecting through a hot cell, or can be implemented by the source storage device of this application. The following takes the connection through the source storage device of this application as an example for illustration.

[0058] Refer to Figure 6 As shown, it can be to use the first pull rod to fixedly connect it to the shielding plug 12, and then use the pull rod to move the shielding plug 12 downward, so that the elastic member on the shielding plug 12 is clamped with the connection groove on the cobalt source cassette 15, that is, the connection between the first connection structure of the cobalt source cassette and the pickup structure of the shielding plug of the source storage device is realized.

[0059] Step 102: Drive the first pull rod to connect it to the second connection structure of the shielding plug of the source storage device and lift the shielding plug to the source loading cavity of the source guiding tank. Driving the first pull rod can be driven by a motor or manually pulled, and this application does not limit it.

[0060] Step 103: Drive the second pull rod to connect it to the third connection structure of the cobalt source cassette. By way of example, the second pull rod can be threadedly connected to the cobalt source cassette, then drive the second pull rod to rotate, so that the thread of the second pull rod is connected to the threaded hole on the cobalt source cassette. Of course, the specific connection method between the second pull rod and the third connection mechanism is not limited in this application, and only the above is taken as an example for illustration.

[0061] Step 104: Drive the first pull rod and the second pull rod to cooperate so that the first connection structure of the cobalt source cassette is separated from the pickup structure.

[0062] By way of example, step 104 specifically includes: driving the first pull rod to move in the first direction so that the elastic member is located in the compression groove; driving the second pull rod to move in the second direction so that the pickup device is disengaged from the connection groove from the second opening.

[0063] Specifically, it can be referred to Figure 5 、 Figure 6As shown in the figure, when driving the first pull rod to move the shielding plug downward along the X direction, the elastic member is snapped into the connection groove of the cobalt source cassette, thereby realizing the connection between the shielding plug and the cobalt source cassette. Connect the second pull rod to the cobalt source cassette. When the shielding plug continues to move downward along the X direction, the elastic member is compressed at the position of the compression groove. At this time, by driving the second pull rod to move outward, the elastic member can be separated from the second opening and the cobalt source cassette.

[0064] Step 105: Drive the second pull rod to send the cobalt source cassette into the radiotherapy device and fix it to the radiotherapy device.

[0065] The source guiding method provided by the present application can realize the disassembly and assembly of the source only by using the source guiding tank, without the need for other shielding devices, simplifying the source guiding process and improving the safety of source guiding.

[0066] For the source guiding method provided by the present application, after the cobalt source cassette is sent into the radiotherapy device, the method further includes: driving the radiotherapy device to perform source off shielding on the radiation source, that is, directly using the radiotherapy device to turn off the source, and then it is convenient for the operator to remove the source guiding tank, etc.

[0067] Of course, the source guiding method provided by the present application further includes the process of taking out the radiation source from the radiotherapy device and storing it in the source storage device, and its process principle is similar to the above.

[0068] A source guiding method is applied to the source guiding system of the present application and is used to guide the cobalt source cassette from the radiotherapy device into the source storage device. The method includes:

[0069] Step 201: Drive the first pull rod to connect it to the second connection structure of the shielding plug of the source storage device and lift the shielding plug to the source loading cavity of the source guiding tank.

[0070] Step 202: Drive the second pull rod to connect it to the third connection structure of the cobalt source cassette and pull the cobalt source cassette to the source loading cavity of the source guiding tank.

[0071] Step 203: Drive the first pull rod and the second pull rod to cooperate so that the first connection structure of the cobalt source cassette is connected to the picking structure.

[0072] Step 204: Drive the second pull rod to separate it from the cobalt source cassette.

[0073] Step 205: Drive the first pull rod to send the cobalt source cassette into the source storage device.

Claims

1. A source guiding system, characterized in that, it is used to guide a cobalt source cassette from a first source storage device to a second source storage device, wherein, one of the first source storage device and the second source storage device is a source storage device, and the source storage device includes: a source storage tank and a shielding plug. An opening and a receiving cavity are provided on the source storage tank, the receiving cavity is used to accommodate the cobalt source cassette, and the shielding plug is used to close the opening of the receiving cavity; wherein, a first connection structure is provided on the cobalt source cassette; a second connection structure is provided on the outer side of the shielding plug, and a picking structure is provided on the inner side, and the first connection structure and the picking structure are detachably connected; the cobalt source cassette further includes a third connection structure; the system includes: a source guiding tank, the source guiding tank includes a tank body, a first pull rod and a first opening, a second pull rod and a second opening. Wherein, the tank body includes a source carrying cavity, the first pull rod and the first opening are located on opposite sides of the source carrying cavity along a first direction, the second pull rod and the second opening are located on opposite sides of the source carrying cavity along a second direction, the first pull rod moves along the first direction and can be connected to the second connection structure of the shielding plug of the first source storage device; the second pull rod moves along the second direction and can be connected to the third connection mechanism of the cobalt source cassette.

2. The source guiding system according to claim 1, characterized in that, the source guiding system further includes a first shielding door for opening and closing the first opening; and / or, the source guiding system further includes a second shielding door for opening and closing the second opening.

3. The source guiding system according to claim 1, characterized in that, the first direction is perpendicular to the second direction.

4. The source guiding system according to claim 1, characterized in that, limiting grooves are provided on the first pull rod and / or the second pull rod, and the source guiding system further includes a fixing member that can be fixed to the limiting grooves to prevent the first pull rod and / or the second pull rod from rotating.

5. The source guiding system according to claim 1, characterized in that, a glass window is provided on the source guiding tank; or, a camera and / or a detection lamp are further provided in the source carrying cavity of the source guiding tank.

6. The source guiding system according to claim 1, characterized in that, the source guiding tank includes a plurality of components, and the plurality of components are fixedly connected.

7. The source guiding system according to claim 1, characterized in that, the picking structure includes an elastic member, and the elastic member is clamped in the first connection structure to realize the connection between the cobalt source cassette and the shielding plug.

8. The source guiding system according to claim 1, characterized in that, the picking structure is directly fixedly connected to the shielding plug; or, the picking structure is connected to the shielding plug through a connecting rod.

9. The source guiding system according to any one of claims 1-8, characterized in that, the first connection structure is a connection groove, and the picking structure can be clamped in the connection groove; the connection groove includes a first opening and a second opening that are communicated, wherein the first opening is located in the first direction and the second opening is located in the second direction; the picking structure extends into the connection groove from the first opening to be clamped with the connection groove, and disengages from the connection groove from the second opening.

10. The source guiding system according to claim 9, characterized in that, The connecting groove includes a clamping groove and a compression groove, wherein the maximum dimension of the clamping groove is greater than the first opening.

11. The guiding source system according to claim 10, characterized in that when the picking structure includes an elastic member, the first opening is greater than the minimum compression dimension of the elastic member and less than the maximum extension dimension of the elastic member.

12. The guiding source system according to claim 11, characterized in that the maximum dimension of the clamping groove is greater than the maximum extension dimension of the elastic member.

13. The guiding source system according to claim 11, characterized in that the maximum dimension of the compression groove is less than the maximum extension dimension of the elastic member.

14. The guiding source system according to claim 9, characterized in that the bottom dimension of the second opening is greater than the top dimension of the second opening, and the maximum opening dimension of the second opening is not less than the minimum compression dimension of the picking structure.

15. The guiding source system according to claim 11, characterized in that the dimension of the second opening at the position corresponding to the compression groove is not less than the minimum compression dimension of the picking structure.

16. A guiding source method, characterized in that applied to the guiding source system according to any one of claims 1-15, for guiding a cobalt source cassette from a source storage device into a radiotherapy device, the method comprising: connecting the first connection structure of the cobalt source cassette with the picking structure of the shielding plug of the source storage device; driving the first pull rod to connect it with the second connection structure of the shielding plug of the source storage device and lift the shielding plug to the source loading cavity of the guiding source tank; driving the second pull rod to connect it with the third connection structure of the cobalt source cassette; driving the first pull rod and the second pull rod to cooperate so that the first connection structure of the cobalt source cassette is separated from the picking structure; driving the second pull rod to send the cobalt source cassette into the radiotherapy device and fix it to the radiotherapy device.

17. The method according to claim 16, characterized in that the picking structure of the guiding source system includes an elastic member, and the elastic member is clamped in the first connection structure to realize the connection between the cobalt source cassette and the shielding plug; the first connection structure is a connecting groove, and the picking structure can be clamped in the connecting groove; the connecting groove includes a first opening and a second opening that communicate with each other, wherein the first opening is in the first direction and the second opening is in the second direction, and the picking structure extends into the connecting groove from the first opening and is clamped with the connecting groove, and disengages from the connecting groove from the second opening; the connecting groove includes a clamping groove and a compression groove, wherein the maximum dimension of the clamping groove is greater than the first opening; The driving the first pull rod and the second pull rod to cooperate so that the first connection structure of the cobalt source cassette is separated from the picking structure specifically includes: driving the first pull rod to move in the first direction so that the elastic member is located in the compression groove; driving the second pull rod to move in the second direction so that the picking structure disengages from the connecting groove from the second opening.

18. The method according to claim 17, characterized in that further comprising: driving the radiotherapy device to perform source-off shielding on the radiation source.

19. A guiding source method, characterized in that applied to the guiding source system according to any one of claims 1-15, for guiding a cobalt source cassette from a radiotherapy device into a source storage device, the method comprising: Drive the first pull rod to connect it with the second connection structure of the shielding plug of the source storage device, and lift the shielding plug to the source loading cavity of the source guiding tank; Drive the second pull rod to connect it with the third connection structure of the cobalt source cassette, and pull the cobalt source cassette to the source loading cavity of the source guiding tank; Drive the first pull rod and the second pull rod to cooperate so that the first connection structure of the cobalt source cassette is connected with the picking structure; drive the second pull rod to separate it from the cobalt source cassette; Drive the first pull rod to send the cobalt source cassette into the source storage device.

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