Particle radiotherapy beam blocking system and method

Abstract

The invention provides a particle radiotherapy beam blocking system and method, and the system comprises a particle beam generation device, and also comprises a blocking device which is disposed on a beam transmission path of the particle beam generation device and is used for blocking the beam transmission path of the particle beam; the dose monitoring device is arranged behind the blocking device and is used for monitoring the beam dose in real time and generating a beam dose signal; the control module is used for receiving the beam dose signal of the dose monitoring device, judging whether the beam dose is greater than or equal to a preset beam dose, and judging whether to send an instruction of stopping beam output to the particle beam generation device and / or send an instruction of blocking a beam transmission path to the blocking device according to a judgment result; according to the invention, the beam dose is monitored in real time, and beam outgoing is stopped and the beam is blocked in time when the preset beam dose is reached, so that the safety and accuracy of particle radiotherapy are further improved, and the injury to a patient caused by excessive irradiation is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of particle radiotherapy beam blocking, and in particular to a particle radiotherapy beam blocking system and method. Background Art

[0002] In particle radiotherapy, an accelerator accelerates charged particles or electrons to high energies, which are then transported to the treatment room via a beam delivery system for precise irradiation of the patient's tumor target. In exceptional circumstances, such as equipment failure or patient discomfort, the beam must be immediately shut off to prevent the particle beam from exceeding a safe dose. Existing technologies typically rely on a dose monitoring device to monitor the beam dose in real time and communicate with the treatment control system (TCS). When the dose monitoring device detects that the cumulative dose has reached the set value in the radiotherapy plan, the TCS controls the PLC to control the particle beam generator to stop generating particles, thereby shutting off the beam.

[0003] However, this approach has several drawbacks: existing technologies achieve dose termination solely by controlling the output of the particle beam generator, lacking physical redundant blocking mechanisms. If the particle beam generator has a response delay or the control system communicates abnormally, the beam may not be shut off in time, resulting in the patient's normal tissue receiving an unsafe dose. FLASH radiotherapy requires high-dose irradiation of tens of Gy within milliseconds. Existing dose feedback control is limited by the particle beam generator's shutdown speed and signal transmission delays, making it difficult to achieve precise beam cessation in a very short period of time. This poses a serious safety hazard. Furthermore, in the event of a sudden equipment failure or urgent patient movement, there is a lack of an independent, rapid physical blocking mechanism, making it impossible to provide backup protection in the event of system failure.

[0004] Therefore, the existing technology needs to be further developed. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above technical deficiencies and provide a particle radiotherapy beam blocking system and method to solve the problems existing in the prior art.

[0006] To achieve the above technical objectives, according to a first aspect of the present invention, the present invention provides a particle radiotherapy beam blocking system, comprising a particle beam generating device, and further comprising: a blocking device, provided on a beam transmission path of the particle beam generating device, for blocking the beam transmission path of the particle beam; a dose monitoring device, arranged after the blocking device, for monitoring the beam dose in real time and generating a beam dose signal; A control module is communicatively connected to the dose monitoring device, the particle beam generating device, and the blocking device, and is used to receive a beam dose signal from the dose monitoring device, determine whether the beam dose is greater than or equal to a preset beam dose, and determine, based on the determination result, whether to send an instruction to the particle beam generating device to stop beam emission and / or send an instruction to the blocking device to block the beam transmission path.

[0007] Specifically, the control module includes a timer, which is used to monitor the beam emission time of the particle beam. The control module determines whether to send an instruction to the particle beam generating device to stop beam emission and / or send an instruction to the blocking device to block the beam transmission path based on the beam emission time of the particle beam.

[0008] Specifically, the particle radiotherapy beam blocking system further includes a treatment control system, which is in communication with both the control module and the particle beam generating device, and is configured to send a start instruction to the particle beam generating device and synchronously trigger the timer to start timing.

[0009] Specifically, the blocking device includes a power element and a blocking member, and the power element is used to drive the blocking member to move to physically block or open the beam path.

[0010] According to a second aspect of the present invention, a particle radiotherapy beam blocking method is provided, comprising: S100, using a dose monitoring device to monitor in real time the beam dose of the particle beam emitted by the particle beam generating device, and generating a beam dose signal; S200, receiving a beam dose signal from the dose monitoring device, and comparing the beam dose with a preset beam dose; S300, judging whether the beam dose is greater than or equal to a preset beam dose, and determining whether to send a command to the particle beam generating device to stop beam emission and / or send a command to the blocking device to block the beam transmission path according to the judgment result.

[0011] Specifically, the method of determining whether to send an instruction to stop beam generation to the particle beam generating device and / or send an instruction to block the beam transmission path to the blocking device according to the judgment result includes: If the beam dose is greater than or equal to the preset beam dose, an instruction to stop beam emission is sent to the particle beam generating device and / or an instruction to block the beam transmission path is sent to the blocking device.

[0012] Specifically, the method of determining whether to send an instruction to the particle beam generating device to stop beam generation and / or send an instruction to the blocking device to block the beam transmission path according to the judgment result further includes: If the beam dose is less than the preset beam dose, no instruction to stop beam emission is sent to the particle beam generating device, and no instruction to block the beam transmission path is sent to the blocking device.

[0013] Specifically, the method further includes: Determining whether the beam emission time of the particle beam reaches a preset beam emission time, and if so, sending an instruction to the particle beam generating device to stop beam emission and / or sending an instruction to the blocking device to block the beam transmission path; If not, no instruction to stop beam generation is sent to the particle beam generating device, and no instruction to block the beam transmission path is sent to the blocking device.

[0014] Specifically, the preset beam emission time is equal to the beam emission time of the preset beam dose minus the action time of the blocking device.

[0015] Beneficial effects: The present invention provides a particle radiotherapy beam blocking system and method. By real-time monitoring of the beam dose and beam emission time, the beam emission and beam blocking system can be stopped and the beam can be blocked in time when a preset beam dose or a preset beam emission time is reached. This solves the problem of a single beam stopping control method in existing radiotherapy equipment and increases the safety of the radiotherapy process by providing multiple beam cutting mechanisms. A dose monitoring device is arranged behind the blocking device. Whether the cumulative dose monitored by the dose monitoring device changes can effectively monitor whether the blocking component has been successfully actuated, thereby reducing the risk of damage to the patient's normal tissues during radiotherapy and greatly improving the safety and accuracy of radiotherapy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 1 is a schematic diagram of the system composition of a particle radiotherapy beam blocking system provided in a specific embodiment of the present invention; Figure 2 is a flow chart of a particle radiotherapy beam blocking method provided in a specific embodiment of the present invention; Figure 3 This is a flowchart of a particle radiotherapy beam blocking system provided in a specific embodiment of the present invention; Figure 4 is a schematic structural diagram of a blocking device provided in a specific embodiment of the present invention; Figure 5 2 is a schematic structural diagram of a mounting base of a blocking device provided in a specific embodiment of the present invention; Figure 6 Schematic diagram of the composition of an electronic radiotherapy device provided in a specific embodiment of the present invention; Figure 7 Schematic diagram of the composition of an X-ray radiotherapy device provided in a specific embodiment of the present invention; Figure 8This is a circuit simulation diagram of a solenoid valve using simulation software provided in a specific embodiment of the present invention; The reference numerals of the above drawings are as follows: 100. Particle beam generating device; 200. Blocking device; 300. Dose monitoring device; 400. Control module; 1. Blocking member; 2. Mounting seat; 3. Air inlet; 4. Air outlet; 5. Left position detector; 6. Right position detector; 7. Cylinder; 8. Push rod; 9. Electron gun; 10. Accelerating tube; 11. Deflection magnet; 12. Target; 13. Beam window. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is clearly and completely described below in conjunction with the drawings of the present invention. Based on the embodiments in this application, other similar embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of this application. In addition, the directional words mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only reference to the directions of the drawings. Therefore, the directional words used are used to illustrate rather than limit the invention.

[0018] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0019] Example 1 See also Figure 1 This embodiment provides a particle radiotherapy beam blocking system, comprising a particle beam generator 100, a blocking device 200, a dose monitoring device 300, and a control module 400. The particle beam generator 100 is used to generate a particle beam for radiotherapy. The blocking device 200 is disposed in the beam transmission path of the particle beam generator 100 and is used to block the beam transmission path of the particle beam when necessary. The dose monitoring device 300 is disposed after the blocking device 200 and is used to monitor the beam dose in real time and generate a beam dose signal. The control module 400 is communicatively connected to the dose monitoring device 300, the particle beam generating device 100 and the blocking device 200, and is used to receive the beam dose signal from the dose monitoring device 300, and determine whether the beam dose is greater than or equal to the preset beam dose, and determine whether to send an instruction to the particle beam generating device 100 to stop beam emission and / or send an instruction to the blocking device 200 to block the beam transmission path based on the judgment result. By integrating the particle beam generating device 100, the blocking device 200, the dose monitoring device 300 and the control module 400, the present invention constructs an intelligent control system with high-precision dose monitoring and real-time response capabilities, thereby achieving precise control of the particle beam dose, rapid response and multiple safety guarantees, and further improving treatment safety.

[0020] See also Figure 6In this embodiment, the particle radiotherapy beam blocking system is set on the electronic radiotherapy device, which includes a particle beam generating device 100, wherein Figure 6 Figure 1 is a schematic diagram of an electron radiotherapy device, which primarily includes key components such as an electron gun 9, an accelerator tube 10, and a deflection magnet 11. In some embodiments, the particle beam generator 100 may not include the deflection magnet 11. These components work together to generate and control a high-energy electron beam. The electron gun 9 generates an electron stream under the action of a high-voltage electric field, which is further accelerated by the accelerator tube 10 to form a high-energy electron beam. The high-energy electron beam is guided by the deflection magnet 11 and transmitted along a predetermined path to the blocking device 200. The control module 400 determines whether the current dose has reached a preset value based on real-time monitoring data from the dose monitoring device 300. If the dose meets the target or an abnormality occurs, the control module 400 issues a command to stop the particle beam generator 100 and / or activate the blocking device 200 to interrupt the electron beam transmission. The precisely controlled electron beam ultimately irradiates the target area in the patient's body, thereby killing or inhibiting tumor cells.

[0021] See also Figure 7 In this embodiment, a particle radiotherapy beam blocking system is provided on an X-ray radiotherapy device, which includes a particle beam generating device 100. Figure 7 Schematic diagram of an X-ray radiotherapy device, which mainly includes key components such as an electron gun 9, an accelerator tube 10, and a deflection magnet 11. Unlike electronic radiotherapy equipment, the X-ray radiotherapy device includes a target 12, which is installed behind the deflection magnet 11 and is used to convert a high-speed electron beam into X-rays. When the high-energy electron beam hits the target material (such as tungsten), a large amount of X-rays are generated, and X-rays can be used to treat tumors. Its main working process includes: the electron gun 9 generates an electron flow under the action of a high-voltage electric field, and further accelerates it through the accelerator tube 10 to form a high-energy electron beam. The high-energy electron beam is guided by the deflection magnet 11 and transmitted to the target 12 along a predetermined path. The control module 400 determines whether the current dose reaches the preset value based on the real-time monitoring data of the dose monitoring device 300. If the dose meets the standard or an abnormality occurs, the control module 400 will issue an instruction to the particle beam generating device 100 to stop the beam and / or the blocking device 200 to operate, thereby blocking the electron beam transmission.

[0022] In this embodiment, the blocking device 200 is positioned along the beam transmission path of the particle beam generator 100. Specifically, it can be located at an appropriate location within the beam transmission system, such as before the beam enters the treatment room. The blocking device 200 comprises a power element and a blocking member 1. The power element, which can be a cylinder, spring, or other similar device, is capable of rapidly responding to control signals and driving the blocking member 1 to move. The blocking member 1 can be made of a low-atomic-number material (such as plexiglass) to effectively block electrons, and the blocking member completely covers the beam exit window of the particle beam generator 100. Driven by the power element, the blocking member 1 can move perpendicular to the beam direction. When the beam needs to be blocked, the blocking member 1 moves into the beam path; when the beam needs to be released, the blocking member 1 moves out of the beam path. The blocking device 200 has a response time of less than 100 milliseconds, ensuring rapid beam blocking in emergency situations.

[0023] See also Figure 4 and Figure 5 In some specific embodiments, the power element adopts a cylinder 7 structure, such as Figure 4 As shown, the cylinder 7 is a power part, the blocking member 1 is movably arranged on the push rod 8 of the cylinder 7, and the entire cylinder structure is arranged on the mounting base 2, as shown in FIG. Figure 5 As shown, a beam window 13 is provided on the mounting base 2, through which the electron beam passes. The blocking member 1, driven by the cylinder 7, can block or open the beam window, thereby interrupting the beam transmission path. Preferably, the beam window 13 is normally closed and is opened only when the radiotherapy device is activated and in the beam delivery preparation state.

[0024] For further information, see Figure 4 The blocking device 200 also includes a position detector, which is arranged on the mounting base 2 and is used to detect the real-time position of the blocking member 1 and feed it back to the control module 400. The control module 400 calculates the actual action time (t1) of the blocking device 200 based on the position signal. The position detector can be a capacitive or inductive proximity switch. When the blocking member 1 approaches the position detector, the position detector detects the change in capacitance or inductance, thereby triggering a signal. The position detector includes a left position detector 5 and a right position detector 6, which are respectively arranged on the left and right sides of the blocking member 1, corresponding to the initial position and blocking position of the blocking member 1, respectively. The control module 400 determines whether the blocking member 1 is in place based on the trigger signal. That is, when the blocking member 1 is on the left, the left position detector 5 receives the trigger signal, and the control module 400 records the time point T start When the blocking member 1 is on the right side, the right position detector 6 receives the trigger signal, and the control module 400 records the time point T end The control module 400 calculates the time t1 required for the blocking device 200 to move from the left to the right, ie, t1 = T start -T end.

[0025] Furthermore, in this embodiment, the cylinder 7 can be connected to a valve, with the two chambers of the valve correspondingly connected to the two chambers of the cylinder 7. When the valve is open, air is discharged from the right side of the cylinder 7 and air is taken in from the left side of the cylinder 7. The interior of the cylinder 7 pushes the push rod 8 to move. The left side of the push rod 8 is provided with an air inlet 3 and an air outlet 4. The push rod 8 drives the blocking member 1 to slide, thereby blocking the beam window 13. Similarly, when the valve is closed, the push rod 8 returns to its original position, and the blocking member 1 returns to its initial position, and the beam window is not blocked. The valve can preferably be a solenoid valve, and its response time (tn) is determined by circuit simulation, as shown in FIG. Figure 8 As shown in the figure, the circuit simulation of the solenoid valve is carried out through simulation software. Figure 8 The horizontal axis is time T, and the vertical axis is current I. Figure 8 Where tn is the action time of the solenoid valve closing, Figure 8 It can be seen that the closing time of the solenoid valve is about 10ms. In radiotherapy equipment and accelerator systems, phase-locked loop (PLL) technology is used to achieve clock synchronization. PLL can lock a reference clock signal and generate multiple phase-synchronized clock outputs to ensure that all components of the accelerator operate on the same clock.

[0026] When formulating a radiotherapy plan, the preset beam delivery time t2 can be obtained by subtracting the action time of the blocking device 200 from the beam delivery time t0 calculated based on the planned radiotherapy dose, that is, the preset beam dose. The action time of the blocking device 200 includes the action time t1 of the blocking member 1 and the action time tn of the solenoid valve closing, that is, the preset beam delivery time t2=t0-tn-t1. Therefore, it is only necessary to ensure that the blocking device 200 is actuated after the timer starts counting to the time length t2, so as to eliminate the delay error caused by the action time of the solenoid valve and the action time of the blocking device 200.

[0027] See also Figure 3 In this embodiment, the dose monitoring device 300 is arranged after the blocking device 200, and is used to monitor the beam dose in real time and generate a beam dose signal. The dose monitoring device can include dose monitors of the type of scintillator, diamond, calorimeter, ionization chamber, etc. In this embodiment, an ionization chamber is used as the dose monitoring device. The ionization chamber is a commonly used beam monitoring device that determines the beam dose by measuring the charge generated by the ionized gas of the particle beam. The ionization chamber includes a cavity filled with a specific gas and an electrode system. When the particle beam passes through the cavity, it ionizes the gas to produce electrons and ions. These charged particles are collected on the electrodes under the action of the electric field, forming a measurable current signal. The ionization chamber has high sensitivity and fast response time, and can monitor changes in the beam dose in real time. In this embodiment, the ionization chamber can adopt a parallel plate ionization chamber structure. The ionization chamber converts the measured current signal into a digital signal through a signal processing circuit and transmits it to the control module 400.

[0028] See also Figure 3 In this embodiment, the control module 400 is communicatively connected to the dose monitoring device 300, the particle beam generating device 100, and the blocking device 200, and is configured to receive the beam dose signal from the dose monitoring device 300, determine whether the beam dose is greater than or equal to a preset beam dose, and, based on the determination result, determine whether to send a command to the particle beam generating device 100 to stop beam emission and / or send a command to the blocking device 200 to block the beam transmission path. The control module 400 can be a dedicated controller or an industrial computer with data acquisition, signal processing, and control output functions. The control module 400 includes a timer, which is configured to monitor the beam emission time of the particle beam. The control module 400 determines, based on the beam emission time of the particle beam, whether to send a command to the particle beam generating device 100 to stop beam emission and / or send a command to the blocking device 200 to block the beam transmission path.

[0029] In some specific embodiments, the control module 400 is one or more programmable logic controllers (PLCs), each of which is equipped with a timer. The PLCs are highly reliable and real-time, making them suitable for safe control of particle radiotherapy systems. The PLCs employ a modular design, including a CPU module, an input / output module, a communication module, and a power module. The CPU module is responsible for executing the control program, processing the beam dose signal from the dose monitoring device 300, and generating control instructions based on preset control logic. The input / output module is used to receive external signals and output control signals, and the communication module is used to exchange data with other devices. The PLC's timer function is used to monitor the beam emission time of the particle beam, and multiple timers can be set for different time control tasks.

[0030] Furthermore, in this embodiment, the PLC programmable logic controller is configured as follows: (1) receiving a beam dose signal from the dose monitoring device 300 and comparing it with a preset beam dose, and when the monitored beam dose reaches the preset beam dose, sending a stop signal to the particle beam generating device 100 and / or sending a blocking signal to the blocking component; (2) When the particle beam generating device 100 is started, a timer is started. When the accumulated time of the timer reaches the preset beam emission time, a stop signal is sent to the particle beam generating device 100 and / or a blocking signal is sent to the blocking component.

[0031] See also Figure 3In this embodiment, the particle radiotherapy beam blocking system also includes a treatment control system, which is in communication with both the control module 400 and the particle beam generating device 100, and is used to send a start instruction to the particle beam generating device 100 and synchronously trigger the timer to start timing. The treatment control system is the upper-level control unit of the entire radiotherapy system, responsible for the execution and supervision of the treatment plan. The treatment control system receives the treatment plan formulated by the doctor, including parameters such as the target dose, irradiation field shape, and energy selection, and converts these parameters into control instructions and sends them to related equipment. The treatment control system is connected to the control module 400 and the particle beam generating device 100 via a network or a dedicated communication interface to achieve data exchange and control signal transmission.

[0032] In practice, the beam blocking system for particle radiotherapy operates as follows: First, the physician formulates a treatment plan based on the patient's condition, including parameters such as target dose, irradiation field geometry, and energy selection, and enters these parameters into the treatment control system. Based on the treatment plan, the treatment control system sends a start command to the particle beam generator 100, simultaneously triggering a timer in the control module 400 to start timing. Upon receiving the start command, the particle beam generator 100 begins generating a particle beam, which is then transmitted to the treatment room via the beam transmission system. During beam transmission, the dose monitoring device 300 monitors the beam dose in real time and sends a beam dose signal to the control module 400. The control module 400 receives the beam dose signal from the dose monitoring device 300 and compares the beam dose with a preset beam dose. If the beam dose is greater than or equal to the preset beam dose, the control module 400 sends a command to the particle beam generator 100 to stop beam generation and / or sends a command to the blocking device 200 to block the beam transmission path. At the same time, the control module 400 also monitors the beam emission time of the particle beam. If the beam emission time reaches the preset beam emission time, it will also send an instruction to the particle beam generating device 100 to stop beam emission and / or send an instruction to the blocking device 200 to block the beam transmission path.

[0033] It should be noted that this embodiment provides a particle radiotherapy beam blocking system. Through the aforementioned design, the particle radiotherapy beam blocking system enables precise control of the particle beam, ensuring that the patient's dose does not exceed the preset value, thereby improving the safety and accuracy of radiotherapy. Furthermore, the system incorporates a dual protection mechanism, namely, beam control by monitoring both beam dose and beam delivery time, further enhancing system reliability.

[0034] Example 2 See also Figure 2 This embodiment provides a particle radiotherapy beam blocking method, comprising the following steps: S100, using the dose monitoring device 300 to monitor the beam dose of the particle beam emitted by the particle beam generating device 100 in real time, and generate a beam dose signal; S200, receiving a beam dose signal from the dose monitoring device 300, and comparing the beam dose with a preset beam dose; S300 , determining whether the beam dose is greater than or equal to a preset beam dose, and determining whether to send a command to the particle beam generating device 100 to stop beam generation and / or send a command to the blocking device 200 to block the beam transmission path based on the determination result.

[0035] Furthermore, in step S100, the dose monitoring device 300 monitors the beam dose of the particle beam emitted by the particle beam generating device 100 in real time and generates a beam dose signal. The dose monitoring device 300 is a commonly used beam monitoring device that determines the beam dose by measuring the charge generated by the ionized gas of the particle beam. The dose monitoring device 300 includes a cavity filled with a specific gas and an electrode system. When the particle beam passes through the cavity, it ionizes the gas to produce electrons and ions. These charged particles are collected on the electrodes under the action of the electric field to form a measurable current signal. The dose monitoring device 300 has high sensitivity and fast response time, and can monitor changes in the beam dose in real time.

[0036] Furthermore, in step S200, the beam dose signal from the dose monitoring device 300 is received and compared with a preset beam dose. The control module 400 receives the beam dose signal from the dose monitoring device 300 and compares it with a preset beam dose. The preset beam dose is a target dose determined according to the treatment plan, typically determined by the physician based on the patient's condition and treatment needs. The preset beam dose can be the total dose for a single treatment or a single dose for fractionated treatments. In this embodiment, the preset beam dose can be set to 2 Gy, a typical single-fraction radiotherapy dose value. The control module 400 compares the real-time measured beam dose with the preset beam dose to determine whether it has reached or exceeded the preset value.

[0037] In step S300, a determination is made as to whether the beam dose is greater than or equal to a preset beam dose, and based on the determination result, a determination is made as to whether to send a command to the particle beam generator 100 to stop beam emission and / or a command to the blocking device 200 to block the beam transmission path. If the beam dose is greater than or equal to the preset beam dose, a command to stop beam emission is sent to the particle beam generator 100 and / or a command to block the beam transmission path is sent to the blocking device 200. If the beam dose is less than the preset beam dose, no command to stop beam emission is sent to the particle beam generator 100 and no command to block the beam transmission path is sent to the blocking device 200, and the beam dose continues to be monitored. This effectively avoids excessive radiation exposure to the patient, reduces treatment risks, significantly improves the safety, accuracy, and efficiency of particle radiotherapy, and promotes the development of more efficient and safer treatment methods. This mechanism is of great significance for protecting patient health and improving the quality of medical services.

[0038] In this embodiment, the method further includes determining whether the particle beam emission time has reached a preset emission time. If so, a command to stop beam emission is sent to the particle beam generating device 100 and / or a command to block the beam transmission path is sent to the blocking device 200. If not, no command to stop beam emission is sent to the particle beam generating device 100, and no command to block the beam transmission path is sent to the blocking device 200. The preset emission time is equal to the emission time for the preset beam dose minus the operation time of the blocking device. This design provides an additional safety mechanism, ensuring that over-irradiation is avoided through time control even if the beam dose monitoring system fails.

[0039] In practice, the specific implementation process of the particle radiotherapy beam blocking method is as follows: First, the doctor formulates a treatment plan based on the patient's condition, including parameters such as the target dose, irradiation field shape, and energy selection, and enters these parameters into the treatment control system. Based on the treatment plan, the treatment control system sends a start command to the particle beam generator 100, simultaneously triggering the timer in the control module 400 to start. Upon receiving the start command, the particle beam generator 100 begins generating the particle beam, which is then delivered to the treatment room via the beam delivery system.

[0040] Furthermore, during the beam transmission process, the dose monitoring device 300 monitors the beam dose in real time and sends a beam dose signal to the control module 400. The control module 400 receives the beam dose signal from the dose monitoring device 300 and compares the beam dose with the preset beam dose. If the beam dose is greater than or equal to the preset beam dose, the control module 400 sends an instruction to the particle beam generating device 100 to stop beaming and / or sends an instruction to the blocking device 200 to block the beam transmission path. At the same time, the control module 400 also monitors the beam emission time of the particle beam. If the beam emission time reaches the preset beam emission time, it will also send an instruction to the particle beam generating device 100 to stop beaming and / or send an instruction to the blocking device 200 to block the beam transmission path. By introducing a dual monitoring mechanism of dose and time, the present invention can maximize the protection of surrounding normal tissues, thereby improving the overall treatment effect, significantly enhancing the safety, accuracy and efficiency of particle radiotherapy, and providing patients with a better treatment experience.

[0041] In some specific embodiments, a preset beam delivery time can be set to be greater than the beam delivery time of the preset beam dose. Under normal circumstances, beam dose control is the primary control mechanism, while time control serves as a backup protection mechanism. For example, if the preset beam dose is 2 Gy, it normally takes 60 seconds to reach this dose. The radiotherapy equipment will experience dose deviation at each beam delivery. The industry standard requires a dose deviation of ±1%, i.e., 2 Gy ± 0.02 Gy. Since the dose monitoring device's beam stop mechanism has already prevented dose overshoot (positive deviation), it is only necessary to appropriately extend the beam delivery time to prevent dose undershoot (negative deviation). The present invention establishes a dual dose-time protection mechanism by presetting the beam delivery time. While the dose monitoring device's beam stop system prevents dose overshoot, the preset beam delivery time further prevents both beam dose overshoot and dose undershoot, significantly improving the safety and reliability of the present invention.

[0042] See also Figure 3 The working principle of the present invention is described below through a specific example. The specific implementation steps of this embodiment are as follows: Step 1: Send a start instruction to the particle beam generating device 100 through the treatment control system (TCS) to synchronously start the timer of the control module 400; Step 2: Use the dose monitoring device 300 to monitor the beam dose in real time and feed back the dose signal to the control module 400; Step 3: When the dose signal reaches a preset beam dose, the control module 400 sends a stop signal to the particle beam generating device 100 and / or sends a blocking signal to the blocking component; Step 4: When the accumulated time of the timer reaches the preset beam emission time, the control module 400 triggers the blocking component to block the beam path.

[0043] It should be noted that this embodiment provides a beam blocking method for particle radiotherapy, enabling precise control of the particle beam, ensuring that the patient's dose does not exceed a preset value, and improving the safety and accuracy of radiotherapy. Furthermore, a dual protection mechanism, controlling the beam by monitoring both beam dose and beam delivery time, further enhances system reliability.

[0044] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

[0045] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in a sequence other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0046] The various technical features described above can be combined arbitrarily. Although not all possible combinations of these technical features are described, any combination of these technical features should be considered to be covered by this specification as long as such combination does not conflict.

[0047] The specific embodiments of the present invention described above do not limit the scope of protection of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A particle radiotherapy beam blocking system, comprising a particle beam generating device (100), characterized in that: Also includes: A blocking device (200), arranged on the beam transmission path of the particle beam generating device (100), and used for blocking the beam transmission path of the particle beam; A dose monitoring device (300), arranged after the blocking device (200), is used to monitor the beam dose in real time and generate a beam dose signal; The control module (400) is communicatively connected to the dose monitoring device (300), the particle beam generating device (100) and the blocking device (200), and is used to receive a beam dose signal from the dose monitoring device (300), and to judge whether the beam dose is greater than or equal to a preset beam dose, and to judge whether to send an instruction to the particle beam generating device (100) to stop beam emission and / or to send an instruction to the blocking device (200) to block a beam transmission path according to the judgment result.

2. The particle radiotherapy beam blocking system according to claim 1, characterized in that: The control module (400) comprises a timer, the timer being used to monitor the beam emission time of the particle beam. The control module (400) determines, based on the beam emission time of the particle beam, whether to send an instruction to the particle beam generating device (100) to stop beam emission and / or to send an instruction to the blocking device (200) to block the beam transmission path.

3. The particle radiotherapy beam blocking system according to claim 2, characterized in that: The particle radiotherapy beam blocking system further comprises a treatment control system, which is in communication with both the control module (400) and the particle beam generating device (100), and is used to send a start instruction to the particle beam generating device (100) and synchronously trigger the timer to start timing.

4. The particle radiotherapy beam blocking system according to claim 1, characterized in that: The blocking device (200) comprises a power element and a blocking member (1), wherein the power element is used to drive the blocking member (1) to move so as to physically block or open a beam path.

5. A particle radiotherapy beam blocking method, characterized in that: The particle radiotherapy beam blocking system according to any one of claims 1 to 4 is used, and the particle radiotherapy beam blocking method comprises: S100, using a dose monitoring device (300) to monitor in real time the beam dose of the particle beam emitted by the particle beam generating device (100), and generating a beam dose signal; S200, receiving a beam dose signal from the dose monitoring device (300), and comparing the beam dose with a preset beam dose; S300, judging whether the beam dose is greater than or equal to a preset beam dose, and judging whether to send a command to the particle beam generating device (100) to stop beam emission and / or send a command to the blocking device (200) to block the beam transmission path according to the judgment result.

6. The particle radiotherapy beam blocking method according to claim 5, characterized in that: The method for determining whether to send an instruction to the particle beam generating device (100) to stop beam generation and / or send an instruction to the blocking device (200) to block the beam transmission path according to the judgment result comprises: If the beam dose is greater than or equal to a preset beam dose, an instruction to stop beam emission is sent to the particle beam generating device (100) and / or an instruction to block the beam transmission path is sent to the blocking device (200).

7. The particle radiotherapy beam blocking method according to claim 6, characterized in that: The method of determining whether to send an instruction to the particle beam generating device (100) to stop beam generation and / or to send an instruction to the blocking device (200) to block the beam transmission path based on the judgment result further includes: If the beam dose is less than the preset beam dose, no instruction to stop beam emission is sent to the particle beam generating device (100), and no instruction to block the beam transmission path is sent to the blocking device (200).

8. The particle radiotherapy beam blocking method according to claim 5, characterized in that: The method further comprises: Determining whether the beam emission time of the particle beam reaches a preset beam emission time, and if so, sending an instruction to stop beam emission to the particle beam generating device (100) and / or sending an instruction to block the beam transmission path to the blocking device (200); If not, no instruction to stop beam emission is sent to the particle beam generating device (100), and no instruction to block the beam transmission path is sent to the blocking device (200).

9. The particle radiotherapy beam blocking method according to claim 8, characterized in that: The preset beam emission time is equal to the beam emission time of the preset beam dose minus the action time of the blocking device.

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