Signal transmission device, radiotherapy equipment and radiotherapy system

Abstract

The present disclosure relates to a signal transmission device, a radiotherapy device and a radiotherapy system. In one aspect, a signal transmission device for bidirectional signal transmission between a radiotherapy device and a host computer is provided, comprising: a fixed part; a power ring rotatable relative to the fixed part; a first communication channel comprising a first antenna and a first signal receiving module, the first antenna being arranged on the power ring, and the first signal receiving module being arranged on the fixed part and in communication with the first antenna, the first communication channel being configured to transmit signals of the radiotherapy device to the host computer; and a second communication channel comprising a second antenna and a second signal receiving module, the second antenna being arranged on the fixed part, and the second signal receiving module being arranged on the power ring and in communication with the second antenna, the second communication channel being configured to transmit signals of the host computer to the radiotherapy device. Thus, the service life is improved, the data transmission bandwidth is increased, and signal shielding caused by physical shielding can be avoided.

Description

Technical Field

[0001] This disclosure relates to the field of medical device technology, and in particular to signal transmission devices, radiotherapy equipment, and radiotherapy systems. Background Technology

[0002] Radiation therapy equipment (such as linear accelerators and gamma knives) is a medical device used for tumor treatment. It typically consists of a fixed gantry and a rotating drum (or rotating gantry). The drum needs to rotate around the patient during radiation therapy to achieve precise multi-angle radiation.

[0003] During rotation, the device located on the drum (as the rotating end) needs to exchange data in real time with the host computer located on the fixed gantry or in the radiotherapy control room (as the fixed end), for example, transmitting image data and treatment parameters.

[0004] Currently, brush-contact slip ring assemblies are commonly used as signal transmission devices between the rotating and fixed ends. These assemblies transmit power and signals through the physical contact between the brush and the slip ring. However, this approach has several drawbacks. First, mechanical friction exists between the brush and the slip ring, leading to wear, short lifespan, and high maintenance costs. Second, the bandwidth of this data transmission is very limited, supporting only low-speed data communication (e.g., RS485), which cannot meet the high-speed transmission requirements of modern radiotherapy equipment, such as the real-time transmission needs for high-resolution imaging data (e.g., computed tomography (CT) images, magnetic resonance imaging (MRI) images) and complex treatment parameters.

[0005] To address this, related technologies employ wireless transmission techniques such as 5G communication. For example, a signal transmitting module is mounted on a drum so that it rotates with the drum, while the signal receiving module is fixed in place. While this approach increases bandwidth, the complex metal structure of radiotherapy equipment can easily cause physical obstruction, leading to signal shielding. Utility Model Content

[0006] This section provides a general overview of this disclosure, rather than a full disclosure of the entire scope or all features of this disclosure.

[0007] According to one aspect of this disclosure, a signal transmission device is provided for bidirectional signal transmission between a radiotherapy device and a host computer. The signal transmission device includes a fixing member, a dynamic ring, a first communication channel, and a second communication channel. The dynamic ring is rotatable relative to the fixing member. The first communication channel includes a first antenna and a first signal receiving module. The first antenna is disposed on the dynamic ring, and the first signal receiving module is disposed on the fixing member and communicates with the first antenna. The first communication channel is used to transmit signals from the radiotherapy device to the host computer. The second communication channel includes a second antenna and a second signal receiving module. The second antenna is disposed on the fixing member, and the second signal receiving module is disposed on the dynamic ring and communicates with the second antenna. The second communication channel is used to transmit signals from the host computer to the radiotherapy device.

[0008] According to another aspect of this disclosure, a radiotherapy device is also provided. This radiotherapy device includes a gantry, a roller, and a signal transmission device according to the above embodiment. The roller is rotatably mounted on the gantry. The fixing element of the signal transmission device is connected to the gantry.

[0009] According to another aspect of this disclosure, a radiotherapy system is also provided. The radiotherapy system includes a radiotherapy device according to the above embodiments, a host computer, and a slave computer. The slave computer receives and executes instructions from the host computer via a signal transmission device, and sends signals from the radiotherapy device to the host computer; the host computer sends instructions to the slave computer via the signal transmission device and receives signals from the radiotherapy device sent by the slave computer.

[0010] In the technical solution provided by this disclosure, by setting up a signal transmission device that uses an antenna and a signal receiving module for non-contact communication, wear and tear on the signal transmission device can be avoided, thereby increasing its service life and reducing maintenance costs. Furthermore, by designing two independent communication channels for signal uploading from the radiotherapy equipment and signal transmission from the host computer, a complete high-speed bidirectional communication link can be provided between the radiotherapy equipment and the host computer, thus simultaneously meeting the high-speed transmission requirements of modern radiotherapy equipment for both the rotating and fixed ends. In addition, by introducing a dedicated fixing component and a power ring as the communication carrier, and placing the antenna or signal receiving module on the power ring, the antenna or signal receiving module can be positioned on a regular annular structure, thereby avoiding signal shielding problems caused by the drum rotating to a recessed area and being blocked by certain devices on the drum. Attached Figure Description

[0011] The features and advantages of embodiments of the present disclosure will become more readily understood from the following description with reference to the accompanying drawings. The drawings are not drawn to scale and some features may be enlarged or reduced to show details of specific components. In the drawings: Figure 1 This is a schematic diagram of radiotherapy equipment in related technologies.

[0012] Figure 2 This is a schematic diagram of the structure of a signal transmission device according to an embodiment of the present disclosure.

[0013] Figure 3 for Figure 2 An exploded view of the signal transmission device shown.

[0014] Figure 4 for Figure 2 The diagram shows the principle block diagram of the signal transmission device.

[0015] Figure 5 for Figure 2 The front view of the signal transmission device shown.

[0016] Figure 6 For along Figure 5 A cross-sectional view of line A-A' in the diagram.

[0017] Figure 7 This is a schematic diagram of a radiotherapy device according to an embodiment of the present disclosure.

[0018] Figure 8 This is a schematic diagram of one installation method for a signal transmission device in a radiotherapy device.

[0019] Figure 9 This is a schematic diagram of a radiotherapy system according to an embodiment of the present disclosure.

[0020] In the accompanying drawings, the same or corresponding technical features or components are represented by the same or corresponding reference numerals. Detailed Implementation

[0021] The present disclosure will now be described in detail with reference to the accompanying drawings and exemplary embodiments. It should be noted that the following detailed description of the present disclosure is for illustrative purposes only and is not intended to limit the scope of the disclosure.

[0022] It should be noted that, for clarity, not all features of a particular embodiment are described or shown in the specification and drawings. Furthermore, to avoid unnecessary details obscuring the technical solutions of interest in this disclosure, only the device structure closely related to the technical solutions of this disclosure is described and shown in the specification and drawings, while other details that are not closely related to the technical content of this disclosure and are known to those skilled in the art are omitted.

[0023] To facilitate understanding of this disclosure, firstly, refer to... Figure 1 A brief description of the radiotherapy system 1' based on the relevant technology is provided.

[0024] The radiotherapy system 1' can be a complete system for performing radiotherapy on a subject to be radiotherapy, such as a treatment system based on radiotherapy equipment such as a linear accelerator or gamma knife.

[0025] The radiotherapy system 1' includes a radiotherapy device 10', a host computer 20', and a slave computer 30'. The host computer 20' sends commands to the slave computer 30' via a signal transmission device 200' and receives signals from the radiotherapy device via the slave computer 30'. The slave computer 30' receives and executes commands from the host computer 20' via the signal transmission device 200' and sends signals from the radiotherapy device 10' to the host computer 20'. The host computer 20' can be a host, server, or console used to control the operation of the radiotherapy device 10', formulate treatment plans, and process and display image data.

[0026] As mentioned earlier, the radiotherapy equipment 10' includes a fixed frame 120', a roller 140', and a signal transmission device 200' integrated between the fixed frame 120' and the roller 140'. The lower unit 30' can generally be installed on the fixed frame 120' of the radiotherapy equipment 10'.

[0027] The fixed gantry 120' is the fixed base of the radiotherapy device 10', typically connected to the floor of the treatment room, and provides support for the roller 140'. The roller 140' is rotatably mounted on the fixed gantry 120' to allow rotation about a (typically horizontal) axis of rotation. The roller 140' carries a treatment head, which includes a source assembly for generating radiation and a collimating assembly for beam shaping of the radiation emitted from the source assembly. It may also carry an imaging system for guiding the radiotherapy procedure.

[0028] When the radiotherapy equipment 10' is operating, the roller 140' needs to rotate to irradiate the target area of ​​the patient from different angles. During this process, the lower-level computer 30' needs to continuously receive and execute instructions from the upper-level computer 20' to realize the treatment process. Simultaneously, the lower-level computer 30' is also responsible for sending real-time parameters of the radiotherapy equipment to the upper-level computer 20', allowing control personnel to understand the equipment's operating status or update instructions in real time. For example, data collected by the imaging device on the roller 140' of the radiotherapy equipment 10' or real-time parameters of the treatment head (e.g., high-resolution images) need to be sent from the lower-level computer 30' to the upper-level computer 20' via the signal transmission device 200'. At the same time, the upper-level computer 20' also needs to send control instructions (e.g., treatment parameters, roller rotation instructions, etc.) to the lower-level computer 30' in real time. The lower-level computer 30' receives and executes these instructions to control the operating status of the radiotherapy equipment. The signal transmission device 200' is used to realize this bidirectional data exchange between the radiotherapy equipment 10' and the upper-level computer 20'.

[0029] As mentioned earlier, brush-contact slip ring assemblies are commonly used as signal transmission devices 200' for data transmission between the rotating and fixed ends. However, mechanical friction exists between the brush 202' and the slip ring 204', leading to easy wear, short service life, and high maintenance costs. Moreover, the data transmission bandwidth of brush-contact slip ring assemblies is very limited and cannot meet the high-speed transmission requirements of modern radiotherapy equipment.

[0030] Furthermore, for wireless transmission solutions in related technologies, attempts are made to achieve data transmission via wireless communication by setting a signal transmitting module (i.e., an antenna) on the drum 140' and fixing the signal receiving module (e.g., on a fixed frame 120'). The carrier of this solution is the existing mechanical or metal structure of the radiotherapy device 10'. However, the drum 140' itself is a complex structure with irregular geometry, carrying various devices such as treatment heads and imaging devices. During the rotation of the drum 140', the distance between the signal transmitting module and the signal receiving module constantly changes. When the drum rotates the signal transmitting module to a recessed area (i.e., a specific angle), some devices carried on the drum 140' may be located between the signal transmitting module and the signal receiving module, causing physical obstruction of the signal transmitting module and resulting in signal shielding. This makes it difficult to achieve highly stable signal transmission on the radiotherapy device 10'.

[0031] In response, according to embodiments of this disclosure, a signal transmission device is provided. The signal transmission device is used for bidirectional signal transmission between a radiotherapy device and a host computer.

[0032] Below, refer to Figures 2 to 6 The signal transmission apparatus 200 according to embodiments of the present disclosure will be described in detail.

[0033] First, refer to Figures 2 to 4 The signal transmission device 200 includes a fixing member 220, a power ring 240, a first communication channel 260, and a second communication channel 280.

[0034] The fixed component 220 is a stationary component in the signal transmission device 200; while the dynamic ring 240 is rotatable relative to the fixed component 220 and is a rotating component in the signal transmission device 200.

[0035] When installed in the radiotherapy device 10, the fixture 220 can be connected to the fixture frame (not shown) of the radiotherapy device 10, while the power ring 240 can be connected to the rotatable roller 140. For example... Figure 2 and Figure 3 As shown, the fastener 220 can be fixed to the bracket 210, and the bracket 210 can be fixed to the fixed frame, or the fastener 220 can be directly fixed to the fixed frame.

[0036] However, the fastener 220 may not be connected to the fixed frame; for example, it may be fixed to the treatment room floor. Furthermore, the power ring 240 may not be connected to the roller (as described below).

[0037] If possible Figure 4 As can be clearly observed, the first communication channel 260 and the second communication channel 280 are two independent communication channels with opposite directions. The first communication channel 260 includes a first antenna 262 and a first signal receiving module 264. The first antenna 262 is disposed on the power ring 240, while the first signal receiving module 264 is disposed on the fixture 220. The first signal receiving module 264 communicates with the first antenna 262 to receive signals from the first antenna 262. In this way, the first communication channel 260 can realize the transmission of signals from the rotating end (drum) to the fixed end (fixed frame), that is, as an uplink, it is used to transmit signals from the radiotherapy device 10 to the host computer 20. These signals may include high-resolution image data from the imaging device on the drum 140, status parameters from the treatment head, real-time data from various sensors, etc.

[0038] The second communication channel 280 includes a second antenna 282 and a second signal receiving module 284. The second antenna 282 is disposed on the fixture 220, while the second signal receiving module 284 is disposed on the power ring 240. The second signal receiving module 284 communicates with the second antenna 282 to receive signals from the second antenna 282. In this manner, the second communication channel 280 enables signal transmission from the fixed end (fixed frame) to the rotating end (drum), that is, as a downlink, it is used to transmit signals from the host computer 20 to the radiotherapy device 10. These signals may include treatment control commands, drum rotation commands, etc., from the host computer 20.

[0039] Since the signal transmission device 200 uses an antenna and a signal receiving module for non-contact communication, there is no mechanical friction, so it is not prone to wear, thereby increasing its service life and reducing maintenance costs.

[0040] Furthermore, the communication channel formed by the antenna and signal receiving module enables higher-speed data transmission. Moreover, by setting up two independent communication channels, both the uplink for transmitting signals from the radiotherapy equipment and the downlink for transmitting signals from the host computer can carry higher-speed data transmission, thus providing a complete high-speed bidirectional communication link between the radiotherapy equipment and the host computer. This simultaneously meets the high-speed transmission requirements of modern radiotherapy equipment for both the rotating and fixed ends.

[0041] Furthermore, by introducing a dedicated fastener 220 and a dynamic ring 240 as a communication carrier, and by placing the antenna or signal receiving module on the dynamic ring 240, the antenna or signal receiving module can be positioned on a regular ring structure, thereby avoiding the signal shielding problem caused by the roller rotating to a recessed area and being blocked by certain devices on the roller.

[0042] It is conceivable that the first communication channel 260 may include multiple sets of first antennas 262 and first signal receiving modules 264. That is, multiple first antennas 262 can be set on the power ring 240, and the same number of second signal receiving modules 264 can be set on the fixing member 220 to form multiple sets of first antennas 262 and first signal receiving modules 264.

[0043] It is understood that the second communication channel 280 may also include multiple sets of second antennas 282 and second signal receiving modules 284. Alternatively, both the first communication channel 260 and the second communication channel 280 may include multiple sets of corresponding antennas and signal receiving modules.

[0044] In this way, bandwidth can be further increased, thereby increasing signal transmission speed; moreover, it also allows for improved fault tolerance of the entire system through redundant backups, thus enhancing the reliability of signal transmission.

[0045] It is conceivable that, in conjunction with reference Figure 5 The 240 power ring can be a slip ring.

[0046] A slip ring is a standard component designed specifically for transmitting power or signals between a rotating end and a fixed end. By making the power ring 240 a slip ring, mature slip ring manufacturing processes and standards can be utilized to ensure that the power ring 240 is a regular ring shape, thereby better achieving consistency in the signal transmission path and reducing the possibility of signal interference.

[0047] In this embodiment, it is conceivable that, in addition to the contactless first communication channel 260 and second communication channel 280, conventional contact transmission functionality can also be integrated. For this purpose, as... Figure 5 As shown, the signal transmission device 200 may also include a brush 230 (e.g., made of a material such as graphite or metal), which is disposed on the fixing member 220 and contacts the slip ring 240.

[0048] The contactless first communication channel 260 and second communication channel 280 can be dedicated to carrying high-speed, high-bandwidth data, such as 5G video data. The contact channel formed by the brush 230 and the slip ring 240 can be used to carry other signals and / or energy, such as transmitting conventional low-speed control signals (such as RS485 signals) and powering the roller 140.

[0049] This approach provides an integrated signal transmission method that combines high-bandwidth, high-reliability wireless and high-reliability wired signals. This method combines high- and low-speed signal transmission, ensuring concurrent transmission and physical isolation of high-resolution images and power control signals, thus meeting the dual requirements of medical devices for high performance and high security.

[0050] like Figure 3 and Figure 5 As shown, it is conceivable that the first antenna 262 can be disposed on the inner circumferential wall and / or the outer circumferential wall of the power ring 240. Figure 3 and Figure 5 The first antenna 262 is exemplarily shown to be disposed on the outer peripheral wall of the power ring 240.

[0051] In this way, the first antenna 262 does not occupy space on the side of the power ring 240. Specifically, when the power ring 240 is a slip ring, multiple conductive tracks are provided on the side of the slip ring for contact with the ends of the brushes to achieve signal and power transmission. By placing the first antenna 262 on the inner and / or outer circumferential walls of the slip ring, the slip ring can maintain its normal signal and power transmission function without being affected by the first antenna 262.

[0052] It is conceivable that, for example Figure 3 and Figure 5 As shown, the first antenna 262 can be a loop antenna, which is continuously arranged along the circumferential direction of the inner and / or outer circumferential walls of the power ring 240.

[0053] By making the first antenna 262 a continuous ring, the fixed first signal receiving module 264 (see [link to article]) remains constant regardless of the angle to which the power ring 240 rotates. Figure 3 The angular and radial distances between the signal transmission and the first antenna 262 remain constant at all times. This ensures constant signal coupling at any angle during a 360-degree rotation of the first antenna 262, improving signal transmission stability.

[0054] It is also conceivable that, such as Figure 2 and Figure 3 As shown, the first signal receiving module 264 is fixed on the fixing member 220, and the sensing surface of the first signal receiving module 264 is opposite to the first antenna 262 and their relative positions remain unchanged, so as to maintain a constant communication gap between the sensing surface and the first antenna 262 and realize stable signal transmission.

[0055] In this way, the signal transmission path can be located in a tiny gap, which not only improves the signal coupling strength, but also completely avoids signal shielding caused by other structures, greatly enhancing the resistance to external electromagnetic interference and improving the real-time performance and stability of signal transmission.

[0056] Refer again Figure 3 It is conceivable that the fastener 220 includes a retaining ring 222, and the second antenna 282 is disposed on the inner circumferential wall and / or the outer circumferential wall of the retaining ring 222. Figure 3 The example shows a second antenna 282 disposed on the inner circumferential wall of a fixing ring 222.

[0057] It is conceivable that, for example Figure 3 and Figure 5 As shown, the second antenna 282 can be a loop antenna, which is continuously arranged along the circumferential direction of the inner and / or outer circumferential walls of the fixed ring 222.

[0058] By making the second antenna 282 a continuous ring, the angular and radial distances between the second signal receiving module 284 and the second antenna 282 remain constant at all times, regardless of the angle to which the power ring 240 rotates. This ensures constant signal coupling at any angle of 360-degree rotation of the second signal receiving module 284, improving the stability of signal transmission.

[0059] It is also conceivable that, for example Figure 5 and Figure 6 As shown, the second signal receiving module 284 is fixed on the power ring 240, and the sensing surface of the second signal receiving module 284 is opposite to the second antenna 282 and their relative positions remain unchanged, so as to maintain a constant communication gap between the sensing surface and the second antenna 282 and realize stable signal transmission.

[0060] Similarly, this method allows the signal transmission path to be located in a tiny gap, which not only improves the strength of signal coupling but also completely avoids signal shielding caused by other structures, greatly enhancing the resistance to external electromagnetic interference and improving the real-time performance and stability of signal transmission.

[0061] It is conceivable that both the first communication channel 260 and the second communication channel 280 can transmit data based on the 5G communication protocol. This would effectively achieve the high bandwidth required for high-speed signal transmission.

[0062] It is also conceivable that the signal transmission between the first signal receiving module 264 and the first antenna 262, and the signal transmission between the second signal receiving module 284 and the second antenna 282, are achieved through capacitive coupling.

[0063] Capacitive coupling can be achieved, for example, by maintaining a small gap between the antenna and the signal receiving module, as mentioned earlier. This capacitive coupling method is a non-contact signal transmission technology that completely avoids physical contact, thereby fundamentally solving the problems of easy wear and short lifespan of brush contact slip ring assemblies, improving the stability of signal transmission, and reducing maintenance costs.

[0064] On the other hand, referring to Figure 7 According to embodiments of this disclosure, a radiotherapy device 10 is also provided.

[0065] The radiotherapy equipment 10 includes a fixed frame 120, a roller 140, and a signal transmission device 200. The signal transmission device 200 has a fixing component 220 (…). Figure 7 (shown in dashed line) is connected to the fixed frame 120.

[0066] In this embodiment, as mentioned before, for example... Figure 2 As shown, when the power ring 240 is a slip ring, the slip ring can be set on the roller 140 and rotate with the roller 140. In this case, the roller 140 drives the power ring 240 to rotate, while the fixing member 220 remains stationary, thereby realizing communication between the roller 140 and the fixed frame 120.

[0067] It is conceivable that, with reference to Figure 8 When the power ring 240 is a slip ring, the slip ring can also be fixed relative to the fixed frame 120, and the slip ring can be rotated by the drive device 300.

[0068] In other words, the slip ring does not rotate with the roller 140 at this time. In this case, a cable 142 can extend from the roller 140, and a first signal receiving module 264 can be fixed at the end of the cable 142, so that the first signal receiving module 264 can always receive the information transmitted by the first antenna 262 on the rotating slip ring when it rotates with the roller 140. For example, the pointing center of the first signal receiving module 264 can be kept constant, and the straight-line distance of the pointing center relative to the first antenna 262 on the slip ring can remain constant.

[0069] This method allows the power ring 240 to be manufactured in a smaller size, thereby reducing manufacturing costs.

[0070] On the other hand, referring to Figure 9 According to embodiments of the present disclosure, a radiotherapy system 1 is also provided.

[0071] The radiotherapy system 1 includes a radiotherapy device 10, a host computer 20, and a slave computer 30.

[0072] The lower-level machine 30 is similar to the lower-level machine 30' in the related art described above. The lower-level machine 30 receives and executes the instructions issued by the upper-level machine 20 through the signal transmission device 200, and sends the signals of the radiotherapy device 10 to the upper-level machine 20.

[0073] Similarly, the host computer 20 is similar to the host computer 20' in the related art described above. The host computer 20 sends instructions to the slave computer 30 through the signal transmission device 200 and receives signals from the radiotherapy device 10 sent by the slave computer 30.

[0074] In this disclosure, the terms "first," "second," etc., are used merely for descriptive purposes and should not be considered restrictive. Furthermore, although this disclosure has been described with reference to exemplary embodiments, it should be understood that this disclosure is not limited to the specific embodiments described and shown herein. Various changes to the exemplary embodiments can be made by those skilled in the art without departing from the scope defined by the claims of this disclosure.

[0075] The features mentioned and / or shown in the foregoing description of exemplary embodiments of this disclosure may be combined in the same or similar manner with one or more other embodiments, combined with features in other embodiments, or substituted for corresponding features in other embodiments. Such combinations or substitutions should also be considered as including within the scope of protection of this disclosure.

Claims

1. A signal transmission device for bidirectional signal transmission between a radiotherapy device and a host computer, characterized in that, include: Fasteners; The dynamic ring is capable of rotating relative to the fixed member; The first communication channel includes a first antenna and a first signal receiving module. The first antenna is disposed on the power ring, and the first signal receiving module is disposed on the fixing component and communicates with the first antenna. The first communication channel is used to transmit the signal of the radiotherapy device to the host computer. as well as The second communication channel includes a second antenna and a second signal receiving module. The second antenna is disposed on the fixing component, and the second signal receiving module is disposed on the power ring and communicates with the second antenna. The second communication channel is used to transmit the signal from the host computer to the radiotherapy device.

2. The signal transmission device according to claim 1, characterized in that, The first communication channel includes multiple sets of first antennas and a first signal receiving module; and / or, the second communication channel includes multiple sets of second antennas and a second signal receiving module.

3. The signal transmission device according to claim 1, characterized in that, The power ring is a slip ring.

4. The signal transmission device according to claim 3, characterized in that, It also includes a brush, which is disposed on the fixing member and contacts the slip ring to realize signal transmission.

5. The signal transmission device according to claim 1, characterized in that, The first antenna is disposed on the inner circumferential wall and / or the outer circumferential wall of the power ring.

6. The signal transmission device according to claim 1, characterized in that, The fixing member includes a fixing ring, and the second antenna is disposed on the inner circumferential wall and / or the outer circumferential wall of the fixing ring.

7. The signal transmission device according to claim 1, characterized in that, Both the first communication channel and the second communication channel transmit data based on the 5G communication protocol; and / or, the signal transmission between the first signal receiving module and the first antenna, and the signal transmission between the second signal receiving module and the second antenna, are achieved through capacitive coupling.

8. A radiotherapy device, characterized in that, include: Fixed frame; A roller is rotatably mounted on the fixed frame; as well as The signal transmission device according to any one of claims 1 to 7, wherein the fixing member of the signal transmission device is connected to the fixing frame.

9. The radiotherapy device according to claim 8, characterized in that, The power ring is a slip ring, which is disposed on the drum and rotates with the drum; or, the slip ring is fixed relative to the fixed frame and rotates by the drive of the drive device.

10. A radiotherapy system, characterized in that, include: According to claim 8 or 9, the radiotherapy equipment, the host computer, and the slave computer, The lower-level machine receives and executes instructions from the upper-level machine through the signal transmission device, and sends signals from the radiotherapy equipment to the upper-level machine; The host computer sends instructions to the slave computer through the signal transmission device and receives signals from the radiotherapy equipment sent by the slave computer.

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