CN115999077B - Radiation safety interlocking method and system for multi-chamber Flash proton therapy - Google Patents
Radiation safety interlocking method and system for multi-chamber Flash proton therapy Download PDFInfo
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Abstract
The application provides a radiation safety interlocking method and a radiation safety interlocking system for multi-chamber Flash proton therapy, comprising a Flash treatment chamber for selecting Flash proton therapy by a Therapy Control System (TCS); 2 adjacent treatment rooms of the Flash treatment room and the Flash treatment room are subjected to clearance treatment; when all the 3 treatment rooms meet the starting conditions, starting FLASH proton treatment until the treatment is finished; according to the application, the Flash treatment room for Flash proton treatment is selected and correspondingly controlled in a linkage manner through the treatment control system, the control and the upgrading and transformation of linkage logic can be performed on the basis of the control and the safety linkage of the existing proton treatment center, and the safety linkage requirement required by the FLASH treatment with extremely high dosage rate can be met without additional hardware or building cost.
Description
Technical Field
The application belongs to the technical field of proton therapy, and particularly relates to a radiation safety interlocking method and system for multi-chamber Flash proton therapy.
Background
Proton therapy is a big leading edge hot spot in the current medical physical world, and is a new qualitative leap of radiotherapy method based on the twenty-century electron linear accelerator tumor radiotherapy. Proton therapy has been a long-felt development route since the suggestion of proton therapy was made by Robert Wilson, university of Harvard, U.S. as early as 1946, although its principle was known as early as fifty in the twentieth century, and advanced breast cancer patients were treated for the first time with proton radiation in Lawrence national laboratory (Lawrence BerkeleyNationalLaboratory, LBL), university of California, U.S. as early as 1954, and this has led to the development of a human's introduction of high energy particles for the treatment of malignant tumors. However, due to the engineering reasons at that time, the positioning accuracy of proton radiotherapy is far higher than the requirements of conventional radiotherapy, the technical indexes of accelerators for producing protons, the positioning diagnosis accuracy of tumors, the accuracy of isocenter of a rotating frame, the rapid data transmission of a computer, the processing and the medical imaging are required to be very high, and the engineering skill at that time cannot be achieved, so that the accelerator application technology, the computer technology, the CT image diagnosis technology and other high-tech technologies developed after the eighties of the last century can be developed and popularized gradually until the beginning of the twenty-first century. Until 1990, the university of LomaLinda medical center (llomc) of the united states was developed and put into clinical use with the first dedicated medical proton synchrotron in the world. After that, due to the progress of medical imaging technology, radiation control technology and computer radiotherapy planning systems, proton radiotherapy becomes controllable and accurate, and the medical proton accelerator market is rapidly developing. Therefore, the proton treatment apparatus is a product of innovation of multidisciplinary engineering technology, and is a product of high-tech interdigitation and integral integration of nuclear technology, computer technology, precision machinery, image processing, data communication, automatic control and medical imaging, medical methods, advanced management, and the like, and is a high-tech engineering of medical and nuclear technology, and has quite high complexity. The application of various innovative technologies greatly advances the development of proton radiotherapy and also applies accelerator technology from the laboratory to medical clinics.
Proton therapy can precisely irradiate tumors and reduce damage to normal tissues, reduce the occurrence risk of side effects, and improve the life quality of patients. To further enhance the understanding of clinical benefits and applications of proton therapy, the medical community is also continually breaking down the clinical trials of proton therapy. Through clinical statistical analysis, proton treatment has the advantages of increasing survival rate and reducing concurrence rate of different degrees in head and neck tumor, lung cancer, breast cancer, esophageal cancer, prostate cancer, liver cancer, bile duct cancer, rectal cancer and the like. Compared with Intensity Modulated Radiation Therapy (IMRT), the total heart dose of proton therapy is reduced by 8-18 times, the clinically significant irradiation dose of heart is reduced by 50%, and the relative risk of heart disease or other coronary events of patients of different ages is reduced by 50-83%. After 5 years of treatment, 97% of patients with partial breast irradiation have no breast cancer recurrence, and 90% of patients have ideal breast remodeling effect. Overall, the incidence of secondary malignancy by proton treatment was relatively reduced by 31%.
The energy deposition at the interaction of the proton beam with the material has the property of releasing less energy at the early stage of the range and not much, called plateau, releasing a lot of energy near the end of the range, forming a peak called bragg peak, after which the energy deposition drops rapidly to 0, the energy deposition curve being shown in the figure. By utilizing the characteristic, the Bragg peak can be placed at the position of the tumor by selecting proper proton energy, so that the dosage of normal tissues before and after the tumor is effectively reduced, and the normal tissues are better protected. The proton has larger mass relative to the electron outside the nucleus, is not easy to scatter, and can effectively reduce the irradiation penumbra.
Flash radiotherapy is a novel noninvasive external irradiation radiotherapy technology, and ultra-high dose rays are delivered through ultra-high dose rate (about not less than 40 Gy/s), so that the treatment window of a patient can be widened, and the patterns of radiotherapy and tumor treatment are obviously changed. Compared with the conventional radiotherapy with the dosage rate of 1-7 cGy/s, the Flash treatment can deliver the irradiation dosage higher than 8Gy in a very short time (less than 1 s), and the dosage rate exceeds 50Gy/s. Researchers believe that high dose rate irradiation leads to oxygen depletion in the tissue, which renders healthy tissue radiation resistant, and thus enables the performance of dose escalation treatments that destroy tumor tissue under conditions of high hypoxia. In other words, healthy tissue is better able to withstand this irradiation regime, whereas tumors are as sensitive to Flash irradiation as traditional therapies. Flash effects were first observed in 1959.
Proton therapy control systems (treatmentcontrol systems) are the primary systems in proton therapy systems where physicians perform therapy related interactions. From an implementation point of view, a TCS (treatment control system) is a set of software that provides the main function of integrating the proton treatment related devices to perform controlled irradiation of a patient according to the planning of a Treatment Plan (TPS) and the guidance of images. The primary systems associated with TCS include: accelerator systems, beam delivery systems, dose delivery systems, patient positioning systems, imaging systems, and the like. The therapy control system can also interact with the tumor information system, schedule treatment for patients requiring treatment each day, retrieve treatment indications (treatment plans), and provide progress information to form a treatment report. These functions are performed by the treatment control system.
Proton beam energy provided by current proton therapy systems can be up to 250MeV, neutrons and gamma rays can be generated during therapy and commissioning by the bombardment of the accelerator and transport means by the proton beam, and gamma radiation fields generated by activation can still be generated after shutdown. In order to ensure that operators and the public of proton treatment apparatus are protected from potentially ionizing radiation. Most proton therapy devices currently employ a multiple treatment chamber arrangement, with a more classical multi-chamber arrangement of 4 treatment chambers. Standard proton therapy is based on treatment plans with radiation doses of around 10CGE per treatment, whereas FLASH proton therapy requires high dose rates in a short time because of the extremely high dose rate. Dose shielding requirements for the region are high. The thickness of the shielding wall in the treatment room is increased to meet the requirements of regional dose shielding and safety interlocking, but the thick shielding wall can greatly increase the construction cost, and the shielding wall is difficult to be modified again by thickening for separate FLASH treatment for the established multi-room proton treatment center.
Disclosure of Invention
To overcome the above-mentioned deficiencies of the prior art, the present application proposes a radiation safety interlock method for multi-chamber Flash proton therapy, comprising:
the treatment control system selects a Flash treatment room for Flash proton treatment;
2 adjacent treatment rooms of the Flash treatment room and the Flash treatment room are subjected to clearance treatment;
when all 3 treatment rooms meet the starting conditions, FLASH proton treatment is started until the treatment is finished.
Preferably, the treatment control system selects a Flash treatment room for Flash proton treatment according to a set condition, and the Flash treatment room comprises:
the treatment control system selects a treatment room with other treatment rooms on two sides as a Flash treatment room for Flash proton treatment.
Further, the clearing treatment is performed on 2 adjacent treatment rooms and the Flash treatment room, including:
carrying out clearance treatment on 2 adjacent treatment rooms of the Flash treatment room;
after a patient for Flash proton treatment is ready, carrying out clearance treatment on the Flash treatment room;
when 2 adjacent treatment rooms of the Flash treatment room and the Flash treatment room simultaneously meet the safety linkage system, the field cleaning treatment is completed.
Further, the starting conditions include:
no sudden stop or overdose threshold alarm exists, and the safety interlocking unlocking and the interlocking signals of the accelerator and the beam line and the treatment head are normal.
Further, after the initiation of the FLASH proton treatment, the method further comprises:
and if the safety linkage of 2 adjacent treatment rooms of the Flash treatment room and any one of the Flash treatment rooms is broken, triggering the safety linkage and stopping the beam current.
Further, the condition that the safety chain is broken includes at least one or more of the following:
the Flash treatment room is adjacent to 2 treatment rooms and any one of the Flash treatment rooms is opened, the scram button is pressed, or any one room dose monitoring exceeds a threshold.
Based on the same inventive concept, the present application also provides a radiation safety interlock system for multi-chamber Flash proton therapy, comprising: a treatment room selection module, a clearance processing module and a treatment module;
the treatment room selection module is used for selecting a Flash treatment room for Flash proton treatment by adopting a treatment control system;
the clearing field processing module is used for clearing field treatment on 2 adjacent treatment rooms of the Flash treatment room and the Flash treatment room;
and the treatment module is used for starting FLASH proton treatment until the treatment is finished when the starting condition is met.
Further, the treatment room selection module is specifically configured to:
the treatment room with other treatment rooms on both sides is selected as a Flash treatment room for Flash proton treatment by the treatment control system.
Further, the cleaning field processing module is specifically configured to:
carrying out clearance treatment on 2 adjacent treatment rooms of the Flash treatment room;
after a patient for Flash proton treatment is ready, carrying out clearance treatment on the Flash treatment room;
when 2 adjacent treatment rooms of the Flash treatment room and the Flash treatment room simultaneously meet the safety linkage system, the field cleaning treatment is completed.
Further, the starting conditions in the treatment module include:
no sudden stop or overdose threshold alarm exists, and the safety interlocking unlocking and the interlocking signals of the accelerator and the beam line and the treatment head are normal.
Further, the system also comprises a suspension module, wherein the suspension module is used for:
and if the safety linkage of 2 adjacent treatment rooms of the Flash treatment room and any one of the Flash treatment rooms is broken, triggering the safety linkage and stopping the beam current.
Further, the condition that the safety chain in the suspension module is broken includes at least one or more of the following:
the treatment room surrounding the Flash treatment room and any one of the Flash treatment rooms may have a treatment room door opened, a scram button pressed, or any one of the room dose monitoring super-thresholds.
Compared with the closest prior art, the application has the following beneficial effects:
the application provides a radiation safety interlocking method and a radiation safety interlocking system for multi-chamber Flash proton treatment, wherein the radiation safety interlocking method comprises the steps that a treatment control system selects a Flash treatment chamber for Flash proton treatment; 2 adjacent treatment rooms of the Flash treatment room and the Flash treatment room are subjected to clearance treatment; when all the 3 treatment rooms meet the starting conditions, starting FLASH proton treatment until the treatment is finished; according to the application, the Flash treatment room for Flash proton treatment is selected and correspondingly controlled in a linkage manner through the treatment control system, the control and the upgrading and transformation of linkage logic can be performed on the basis of the control and the safety linkage of the existing proton treatment center, and the safety linkage requirement required by the FLASH treatment with extremely high dosage rate can be met without additional hardware or building cost.
Drawings
FIG. 1 is a schematic flow diagram of a radiation safety interlock method for multi-chamber Flash proton therapy provided by the present application;
FIG. 2 is a schematic diagram of a standard radiation dose safety interlock system in accordance with the present application;
FIG. 3 is a schematic layout diagram in a multi-chamber proton therapy related to the present application;
FIG. 4 is a schematic diagram of a radiation safety interlock system for multi-chamber Flash proton therapy according to the present application.
Detailed Description
The application provides a radiation safety interlocking method and a radiation safety interlocking system for multi-chamber Flash proton treatment, which are characterized in that due to the design of multi-chamber proton treatment chambers, a standard multi-chamber proton treatment chamber is provided with 4 treatment chambers which are arranged side by side, when one treatment chamber needs to carry out FLASH treatment according to a treatment plan, a case needing FLASH proton treatment can be arranged in one of a middle No. 2 treatment chamber or a middle No. 3 treatment chamber, and two treatments which are close to each other are also subjected to clearance treatment, for example, the No. 2 treatment chamber is arranged to carry out FLASH proton treatment, and meanwhile, the No. 1 treatment chamber and the No. 3 treatment chamber are subjected to clearance treatment, so that no personnel are in the No. 1 treatment chamber and the No. 3 treatment chamber. The closed space in the treatment chambers No. 2 and No. 3 can be equivalent to a shielding wall, so that the safety of additional dosage in the FLASH treatment process is ensured, and the FLASH proton treatment with extremely high dosage can be performed under the conditions of not changing the layout of the existing multi-chamber proton treatment center and not additionally thickening the partial shielding wall. The FLASH proton treatment with extremely high dosage rate can be satisfied only by modifying and upgrading case scheduling and safety-linked clearance logic in the existing proton treatment control system, and the construction cost of newly-built or thickened shielding walls is reduced.
The following describes the embodiments of the present application in further detail with reference to the drawings.
Example 1:
the application provides a radiation safety interlocking method for multi-chamber Flash proton therapy, which is shown in figure 1 and comprises the following steps:
step 1: a Treatment Control System (TCS) selects a Flash treatment room for Flash proton treatment;
step 2:2 adjacent treatment rooms of the Flash treatment room and the Flash treatment room are subjected to clearance treatment;
step 3: when all 3 treatment rooms meet the starting conditions, FLASH proton treatment is started until the treatment is finished.
The method provided by the application is based on a standard radiation dose safety interlocking system as shown in fig. 2, the energy of proton beam current provided by the proton treatment system can reach 250MeV at most, neutrons and gamma rays can be generated during treatment and debugging because the proton beam bombards an accelerator and a conveying component, and a gamma radiation field generated by activation can still be generated after shutdown. In order to ensure that operators and the public of the proton treatment device are protected from the potential ionizing radiation, a radiation safety interlocking system is designed, the system comprises radiation monitoring and safety interlocking equipment, and a safety procedure is embedded into the operation and maintenance process of the proton treatment device through a whole set of interlocking equipment and corresponding software programs, so that the purpose of protecting the personal safety of the operators is achieved. The design of the safety interlocking system of the proton treatment system follows the principles of 'failure safety', 'deep defense' and 'optimal cut-off', not only the key safety equipment of important places adopts multiple 'redundant' designs, but also the core control equipment is 'failure safety'. The radiation safety interlocking system comprises a safety interlocking subsystem and a radiation monitoring subsystem, and the two systems are mutually matched and connected through a communication cable to realize dose interlocking.
Standard radiation dose safety interlock systems consist essentially of a safety controller, field devices, and a network communication section. And the system is matched with systems such as dose monitoring, factory building safety doors and the like to form a typical three-layer monitoring system. The system core component is a Programmable Logic Controller (PLC), and the signals of the input and output modules are directly connected with the safety component and the system interlocking hard wire. The input module is mainly responsible for sending the states of safety components such as emergency stop buttons, a threshold switch, key control and the like to the controller. The output module is mainly responsible for sending control signals of the controller to corresponding output equipment such as accelerator safety equipment and the like. The main control computer in the control room communicates with the main controller of the safety interlocking system through the field bus to obtain the real-time state of the field device of the safety interlocking system. The safety interlocking equipment of the user site proton treatment system comprises key control, a threshold switch, a moving part, an emergency stop button, a cleaning field searching button, state monitoring and the like. The scram button and the clear-field search button are visual, easy to identify and easy to reach. Setting a monitoring device at an important position; the radiation area is provided with a warning and voice prompt device before the machine operates, and the console is provided with an electronic display screen for displaying the working condition of the interlocking device in the radiation area.
The layout in a multi-chamber proton therapy employing the method provided by the present application is shown in fig. 3. In general, a multi-chamber proton therapy apparatus has at least 3 or more treatment rooms, and the patients to be treated with FLASH protons can be arranged in treatment room No. 2 or 3 by a Treatment Control System (TCS) or a patient scheduling tool of a proton treatment center. I.e. treatment room No. 2 or No. 3 is the Flash treatment room selected in step 1.
For example, when the case schedule schedules a patient undergoing FLASH treatment to treatment room No. 2, the patient needs to be cleaned simultaneously after the patient is ready to complete treatment rooms No. 1 and No. 3 and treatment room No. 2, and when the cleaning is completed, the radiation safety linkage system can give a signal to the treatment control system that the safety linkage has been satisfied, allowing beam-out treatment.
The radiation safety interlocking method for multi-chamber Flash proton therapy comprises the following specific procedures:
step 1: a Treatment Control System (TCS) selects a Flash treatment room for Flash proton treatment; i.e. the treatment control system arranges the FLASH treatment case in treatment room No. 2.
Step 2:2 adjacent treatment rooms of the Flash treatment room and the Flash treatment room are subjected to clearance treatment; the method specifically comprises the following steps:
2-1: the treatment room 1 and the treatment room 3 are subjected to clearance treatment
2-2: after the patient in treatment room No. 2 is ready, the physician performs a clearance
2-3: the safety interlocking system judges that the treatment rooms No. 1, no. 2 and No. 3 simultaneously meet the safety interlocking system, and the cleaning of the treatment room is completed.
Step 3: when all the 3 treatment rooms meet the starting conditions, starting FLASH proton treatment until the treatment is finished; in particular to
3-1: there is no scram, or overdose threshold alarm. Safety interlock unlocking, accelerator and restraint line, and therapy head interlock signal. And running the proton beam to flow out of the beam, prompting a treatment room control system, meeting the safety interlocking condition, and allowing the beam-out treatment to be performed.
3-2: and carrying out FLASH proton treatment until the treatment is finished.
After the FLASH proton treatment is started, if the safety linkage of any one of the treatment rooms 1, 2 and 3 is broken, for example, the treatment room door is opened, the scram button is pressed, or the dose monitoring of any room exceeds a threshold value, the safety linkage is triggered, the accelerator linkage signal is disconnected, and the beam stops. Thereby ensuring the safety of radiation dose in the FLASH proton treatment process.
The embodiment can complete the control and the upgrading and the transformation of the linkage logic on the basis of the control and the safety linkage of the existing proton treatment center, thereby meeting the safety linkage requirement required by FLASH treatment with extremely high dosage rate without adding additional hardware or building cost.
Example 2:
based on the same inventive concept, the application also provides a radiation safety interlocking system for multi-chamber Flash proton therapy, the system structure is shown in fig. 4, and the radiation safety interlocking system comprises: comprising the following steps: a treatment room selection module, a clearance processing module and a treatment module;
the treatment room selection module is used for selecting a Flash treatment room for Flash proton treatment by adopting a Treatment Control System (TCS);
the clearing field processing module is used for clearing field treatment on 2 adjacent treatment rooms of the Flash treatment room and the Flash treatment room;
and the treatment module is used for starting FLASH proton treatment until the treatment is finished when the starting condition is met.
Preferably, the treatment room selection module is specifically configured to:
a treatment room with other treatment rooms on both sides is selected as a Flash treatment room for Flash proton treatment by a Treatment Control System (TCS).
Preferably, the cleaning field processing module is specifically configured to:
carrying out clearance treatment on 2 adjacent treatment rooms of the Flash treatment room;
after a patient for Flash proton treatment is ready, carrying out clearance treatment on the Flash treatment room;
when 2 adjacent treatment rooms of the Flash treatment room and the Flash treatment room simultaneously meet the safety linkage system, the field cleaning treatment is completed.
Preferably, the starting conditions in the treatment module include:
no sudden stop or overdose threshold alarm exists, and the safety interlocking unlocking and the interlocking signals of the accelerator and the beam line and the treatment head are normal.
Preferably, the system further comprises a suspension module for:
and if the safety linkage of 2 adjacent treatment rooms of the Flash treatment room and any one of the Flash treatment rooms is broken, triggering the safety linkage and stopping the beam current.
Preferably, the condition that the safety chain in the suspension module is broken includes at least one or more of the following:
the treatment room surrounding the Flash treatment room and any one of the Flash treatment rooms may have a treatment room door opened, a scram button pressed, or any one of the room dose monitoring super-thresholds.
Example 3:
based on the same inventive concept, the application also provides a computer device comprising a processor and a memory for storing a computer program comprising program instructions, the processor for executing the program instructions stored by the computer storage medium. The processor may be a central processing unit (CentralProcessing Unit, CPU), but may also be other general purpose processors, digital signal processors (DigitalSignalProcessor, DSP), application specific integrated circuits (ApplicationSpecificIntegratedCircuit, ASIC), off-the-shelf programmable gate arrays (Field-ProgrammableGateArray, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc., which are the computational core and control core of the terminal adapted to implement one or more instructions, particularly adapted to load and execute one or more instructions within a computer storage medium to implement the corresponding method flow or corresponding functions to implement the steps of a radiation safety interlock method for multi-chambered Flash proton therapy in the above embodiments.
Example 4:
based on the same inventive concept, the present application also provides a storage medium, in particular, a computer readable storage medium (Memory), which is a Memory device in a computer device, for storing programs and data. It is understood that the computer readable storage medium herein may include both built-in storage media in a computer device and extended storage media supported by the computer device. The computer-readable storage medium provides a storage space storing an operating system of the terminal. Also stored in the memory space are one or more instructions, which may be one or more computer programs (including program code), adapted to be loaded and executed by the processor. The computer readable storage medium herein may be a high-speed RAM memory or a non-volatile memory (non-volatile memory), such as at least one magnetic disk memory. One or more instructions stored in a computer-readable storage medium may be loaded and executed by a processor to implement the steps of a radiation safety interlock method for multi-chambered Flash proton therapy in accordance with the above embodiments.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should be noted that the above embodiments are only for illustrating the technical solution of the present application and not for limiting the scope of protection thereof, and although the present application has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that various changes, modifications or equivalents may be made to the specific embodiments of the application after reading the present application, and these changes, modifications or equivalents are within the scope of protection of the claims appended hereto.
Claims (4)
1. A radiation safety interlock method for multi-chamber Flash proton therapy comprising:
the treatment control system selects a Flash treatment room for Flash proton treatment;
2 adjacent treatment rooms of the Flash treatment room and the Flash treatment room are subjected to clearance treatment;
when all the 3 treatment rooms meet the starting conditions, starting FLASH proton treatment until the treatment is finished;
wherein, the treatment control system selects a Flash treatment room for Flash proton treatment, and comprises
The treatment control system selects a treatment room with other treatment rooms on two sides as a Flash treatment room for Flash proton treatment;
carrying out clearance treatment on 2 adjacent treatment rooms of the Flash treatment room and the Flash treatment room, wherein the clearance treatment comprises the following steps:
carrying out clearance treatment on 2 adjacent treatment rooms of the Flash treatment room;
after a patient for Flash proton treatment is ready, carrying out clearance treatment on the Flash treatment room;
when 2 adjacent treatment rooms of the Flash treatment room and the Flash treatment room simultaneously meet a safety linkage system, finishing the field clearing treatment;
the start condition includes:
no sudden stop or overdose threshold alarm exists, and the safety interlocking unlocking and the interlocking signals of the accelerator and the beam line and the treatment head are normal.
2. The method of claim 1, wherein after said initiating of FLASH proton therapy, further comprising:
and if the safety linkage of 2 adjacent treatment rooms of the Flash treatment room and any one of the Flash treatment rooms is broken, triggering the safety linkage and stopping the beam current.
3. The method of claim 2, wherein the condition in which the safety chain is broken comprises at least one or more of:
the Flash treatment room is adjacent to 2 treatment rooms and any one of the Flash treatment rooms is opened, the scram button is pressed, or any one room dose monitoring exceeds a threshold.
4. A radiation safety interlock system for multi-chambered Flash proton therapy comprising: a treatment room selection module, a clearance processing module and a treatment module;
the treatment room selection module is used for selecting a Flash treatment room for Flash proton treatment by adopting a treatment control system;
the clearing field processing module is used for clearing field treatment on 2 adjacent treatment rooms of the Flash treatment room and the Flash treatment room;
the treatment module is used for starting FLASH proton treatment when all 3 treatment rooms meet the starting conditions until the treatment is finished;
wherein, the treatment room selection module is specifically used for:
the treatment room with other treatment rooms on two sides is selected as a Flash treatment room for Flash proton treatment by the treatment control system;
the field cleaning processing module is specifically used for:
carrying out clearance treatment on 2 adjacent treatment rooms of the Flash treatment room;
after a patient for Flash proton treatment is ready, carrying out clearance treatment on the Flash treatment room;
when 2 adjacent treatment rooms of the Flash treatment room and the Flash treatment room simultaneously meet a safety linkage system, finishing the field clearing treatment;
a starting condition in the treatment module comprising:
no sudden stop or overdose threshold alarm exists, and the safety interlocking unlocking and the interlocking signals of the accelerator and the beam line and the treatment head are normal.
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