CN210119575U - Medical equipment, dose monitoring device and dose control system of electronic linear accelerator - Google Patents
Medical equipment, dose monitoring device and dose control system of electronic linear accelerator Download PDFInfo
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- CN210119575U CN210119575U CN201920255873.5U CN201920255873U CN210119575U CN 210119575 U CN210119575 U CN 210119575U CN 201920255873 U CN201920255873 U CN 201920255873U CN 210119575 U CN210119575 U CN 210119575U
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Abstract
The utility model relates to an accelerator technical field especially discloses a medical equipment, dose monitoring device and medical electron linear accelerator dosage control system, and wherein, medical equipment includes: the particle accelerator comprises an accelerating tube and a beam pipeline connected with the outlet of the accelerating tube; the sensor is arranged at the periphery of the beam pipeline and generates a signal for reacting the charge of the particle beam in real time through inductive or capacitive coupling; and the processor acquires corresponding dose according to the parameters of the current pulse signals. Therefore, utilize the utility model discloses the scheme can carry out real-time supervision to the dose of the beam pulse of accelerator output to can control and get into the internal dose of patient and guarantee patient's safety when reaching treatment.
Description
Technical Field
The utility model relates to a medical accelerator technical field, concretely relates to medical equipment, dose monitoring device and medical electron linear accelerator dosage control system.
Background
According to the requirements of the regulation GB9706.5-2008, a dose monitoring system must be included in the medical electron linear accelerator. The dose monitoring system used by the traditional medical accelerator consists of an ionization chamber detector and an auxiliary circuit thereof. The ionization chamber is positioned in the radiation system, is arranged between the homogenizing filter or the scattering foil and the secondary collimator of the photon line, and consists of a plurality of pole pieces, wherein two pairs of pole pieces are used for monitoring the homogenization degree of two mutually vertical directions in the radiation field, one pole piece is used for monitoring the energy change of radiation, and the other two pole pieces are used for detecting the absorption dose of the radiation. The dose monitoring system of the traditional medical accelerator mostly uses a flat ionization chamber, the size of the flat ionization chamber is required to cover the whole treatment radiation field, and the number of the flat ionization chambers is limited. The function of the dose monitoring system is to monitor the X-ray, the dose rate of the electron beam, the integrated dose and the symmetry and flatness of the field.
The utility model discloses a utility model people is realizing the utility model discloses an in-process discovers: in the existing dose monitoring system, X rays or electron beams need to directly pass through an ionization chamber in the dose monitoring process, and a part of beam lines can be lost in the process, so that the dose transmission efficiency is reduced; on the other hand, with the new electron beam afterloading device, the electron beam is transported in a stainless steel (or other material) tube all the way from the accelerator tube to the tumor, and cannot directly pass through the ionization chamber, so the ionization chamber is not suitable for such a device.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention has been made to provide a medical device that overcomes or at least partially solves the above problems, including:
the particle accelerator comprises an accelerating tube and a beam pipeline connected with the outlet of the accelerating tube;
the sensor is arranged at the periphery of the beam pipeline and generates a signal for reacting the charge of the particle beam in real time through inductive or capacitive coupling;
and the processor acquires corresponding dosage according to the signal of the charge of the reaction particle beam.
In one embodiment, the particle accelerator is one of a medical electron linear accelerator, a medical proton accelerator, and a medical heavy ion accelerator.
In one embodiment, the sensor is a current transformer, the sensor is sleeved on the beam pipeline, and the signal reflecting the charge of the particle beam is a current pulse signal.
In one embodiment, the medical device further comprises a pulse collection circuit for collecting the current pulse signal from the inductor; the processor calculates the real-time dose according to the corresponding relation between the dose and the parameters of the current pulse signal.
In one embodiment, the number of the inductors is two, the first inductor and the second inductor are respectively provided, the first inductor is sleeved on the beam pipeline, the second inductor is sleeved on the first inductor, the processor obtains a first real-time dose according to the corresponding relation between the dose and the signal of the reaction particle beam charge of the first inductor, and the processor calculates a second real-time dose according to the corresponding relation between the dose and the signal of the reaction particle beam charge of the second inductor.
In one embodiment, the processor obtains the real-time dose by performing an accumulation calculation based on a predetermined dose corresponding to a signal parameter of the charge of the reactive particle beam.
In one embodiment, the medical apparatus further comprises a dose controller that stops outputting the particle beam when the real-time dose is greater than or equal to a preset threshold.
In one embodiment, the medical device further comprises a particle extraction structure, wherein a beam needle is arranged on the particle extraction structure, and the particles are emitted from the beam needle which is directly inserted into the patient body or extends into the patient body through a sleeve to ablate the bad tissues.
The utility model also provides a dose monitoring devices is applied to the medical electron linear accelerator dose of real-time supervision, and electron linear accelerator has the accelerating tube, and the export of accelerating tube is provided with the line pipeline, and dose monitoring devices includes:
the inductor is sleeved on the beam pipeline and generates a signal for reflecting the electron beam charge in real time through inductive or capacitive coupling;
and the processor acquires corresponding dosage according to the signal reflecting the electron beam charge.
In one embodiment, the sensor is a current transformer, the sensor is sleeved on the beam current pipeline, and the signal reflecting the electron beam charge is a current pulse signal.
In one embodiment, the number of the sensors is two, and the sensors are respectively a first sensor and a second sensor, the first sensor is sleeved on the beam pipeline, the second sensor is sleeved on the first sensor, the processor obtains a first real-time dose according to the corresponding relation between the dose and the signal of the first sensor for reflecting the electron beam charges, and the processor obtains a second real-time dose according to the corresponding relation between the dose and the signal of the second sensor for reflecting the electron beam charges.
In one embodiment, the processor obtains the real-time dose by accumulating according to a preset dose-to-current pulse signal parameter correspondence.
In one embodiment, the processor is connected to the dose controller, and when the real-time dose is greater than or equal to a preset threshold, the processor instructs the dose controller to stop outputting the electron beam.
In one embodiment, the device further comprises an electron extraction structure, wherein a beam current needle is arranged on the electron extraction structure, and electrons are emitted from the beam current needle which is directly inserted into the patient or extends into the patient through a sleeve to ablate the bad tissues.
The utility model also provides a dose monitoring device is applied to the medical particle accelerator dose of real-time supervision, and the particle accelerator has the accelerating tube, and dose monitoring device includes:
the sensor is arranged at the outlet of the accelerating tube and generates a corresponding current pulse signal according to the electron beam at the outlet of the accelerating tube;
and the processor is used for acquiring real-time dose according to the parameters of the current pulse signals.
In one embodiment, the processor obtains the real-time dose by accumulating according to a preset dose-to-current pulse signal parameter correspondence.
In one embodiment, the number of the inductors is two, and the inductors are respectively a first inductor and a second inductor, the first inductor is sleeved on the beam pipeline at the outlet of the accelerating tube, the second inductor is sleeved on the first inductor, the processor obtains a first real-time dose according to the dose and parameters of current pulse signals of the first inductor, and the processor obtains a second real-time dose according to the dose and parameters of current pulse signals of the second inductor.
In one embodiment, the processor is connected to the dose controller, and when the real-time dose is greater than or equal to a preset threshold, the processor instructs the dose controller to stop outputting the particle beam.
The utility model also provides a medical electron linear accelerator dosage control system, electron linear accelerator include accelerating tube, and the system includes:
a dose controller for controlling the output of the electron beam of the electron linear accelerator;
the inductor is arranged at the outlet of the accelerating tube and used for generating a signal for reflecting electron beam charges in real time through inductive or capacitive coupling;
a processor for obtaining a real-time dose from a parameter of the signal reflecting the electron beam charge;
and when the real-time dose is greater than or equal to a preset threshold value, the dose controller controls the electron linear accelerator to stop outputting the electron beam.
In one embodiment, the number of the inductors is two, and the inductors are respectively a first inductor and a second inductor, the first inductor is sleeved on the beam pipeline at the outlet of the accelerating tube, and the second inductor is sleeved on the first inductor; the processor obtains a first real-time dose according to the corresponding relation between the dose and the signal of the first sensor for reflecting the electron beam charge; the processor obtains a second real-time dose according to the corresponding relation between the dose and the signal of the second sensor for reflecting the electron beam charge; and when the first real-time dose or the second real-time dose is greater than or equal to a preset threshold, the dose controller controls the electron linear accelerator to stop outputting the electron beam.
In one embodiment, the sensor is a current transformer, the sensor is sleeved on the beam current pipeline, and the signal reflecting the electron beam charge is a current pulse signal.
In one embodiment, the control system further comprises a pulse collection circuit for collecting a current pulse signal from the inductor; the processor obtains the real-time dose according to the corresponding relation between the dose and the parameters of the signals reflecting the electron beam charges.
The utility model discloses an exit at medical accelerator sets up the inductor, gathers current pulse signal, according to current pulse signal's parameter and the corresponding relation of dose, acquires real-time dose to can control and ensure patient's safety when getting into patient's internal dose and reaching treatment.
The above description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the present invention is given.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 shows a block diagram of a medical device according to an embodiment of the present invention;
fig. 2 shows a schematic structural view of a medical device according to an embodiment of the present invention;
fig. 3 shows a block diagram of a medical device according to an embodiment of the present invention;
fig. 4 shows a block diagram of a dose real-time monitoring device of a medical electronic linear accelerator according to an embodiment of the present invention;
fig. 5 shows a block diagram of a dose real-time monitoring device of a medical electronic linear accelerator according to an embodiment of the present invention;
fig. 6 shows a block diagram of a device for monitoring dosage of a medical particle accelerator in real time according to an embodiment of the present invention;
fig. 7 shows a block diagram of a device for monitoring dosage of a medical particle accelerator in real time according to an embodiment of the present invention;
fig. 8 shows a block diagram of a dose control system of a medical electron linear accelerator according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Fig. 1 shows a block diagram of a medical device according to an embodiment of the present invention. As shown in fig. 1, the apparatus includes a particle accelerator 101, a sensor 102, and a processor 103.
The particle accelerator 101 comprises an accelerating tube and a beam pipeline connected with the outlet of the accelerating tube.
A particle accelerator, or accelerator for short, is a device for accelerating charged particles, and is commonly used in nuclear experiments, radiology, radiochemistry, radioisotope fabrication, non-destructive inspection, and the like. In the acceleration mode, the accelerator includes a linear accelerator and a cyclotron. Accelerators include electron accelerators, proton accelerators and heavy ion accelerators, depending on the type of particle being accelerated.
Medical electron linear accelerators, medical proton accelerators, and medical heavy ion accelerators are commonly used for tumor therapy. The medical electronic linear accelerator comprises an accelerating tube, a microwave source, a waveguide system, a control system, a ray leveling and protecting system and the like.
In an embodiment of the present invention, the particle accelerator 101 is a medical electron linear accelerator. In some embodiments, the particle accelerator 101 may also be a medical proton accelerator or a medical heavy ion accelerator.
The inductor 102 is disposed at the periphery of the beam channel, and generates a signal reflecting the charge of the particle beam in real time through inductive or capacitive coupling. Preferably, the inductor is provided within the vacuum chamber.
In the embodiment of the present invention, the inductor 102 is a current transformer, and is sleeved on the beam pipeline at the outlet of the accelerating tube of the particle accelerator 101. The inductor 102 may be a Fast Beam Current Transformer (FBCT) that measures charge by integrating beam current or wall image current inductively or capacitively coupled to the measurement device by combining AC means with an electrostatic pickup, Wall Current Monitor (WCM). The inductor 102 may also be a DC current transformer (DCCT) that provides charge information based on magnetic feedback established with the light beam.
The processor 103 derives the corresponding particle dose from the parameters of the signal reflecting the charge of the particle beam. In one embodiment, the processor obtains the real-time dose by performing an accumulation calculation based on a predetermined dose corresponding to a signal parameter of the charge of the reactive particle beam.
For safety, to avoid the sensor failure, in one embodiment, the number of the sensors is two, i.e. a first sensor and a second sensor, the first sensor is sleeved on the beam current pipeline, and the second sensor is sleeved on the first sensor. The processor obtains a first real-time dose according to the corresponding relation between the dose and the signal of the reaction particle beam charge of the first sensor. The processor calculates a second real-time dose according to the corresponding relation between the dose and the signal of the reaction particle beam charge of the second sensor.
In one embodiment, the signal reflecting the charge of the particle beam is a current pulse signal, the medical apparatus further comprising a pulse collection circuit for collecting the current pulse signal from the inductor; the processor calculates the real-time dose according to the corresponding relation between the dose and the parameters of the current pulse signal.
When the electron beam pulse passes through the beam current pipeline, a current pulse signal is induced and generated in the current transformer.
Parameters of the current pulse signal include, but are not limited to: pulse amplitude Um, pulse repetition period T, pulse width tw.
The dose may be an integrated dose, for example, a dose accumulated from the moment the particle accelerator 101 starts to output.
In the embodiment of the present invention, the dose rate, i.e. the dose in unit time, is directly proportional to the current intensity of the electron beam under the condition of certain energy. As described above, the magnitude of the amplitude of the current pulse signal induced in the current transformer is proportional to the intensity of the electron beam pulse, which can be obtained from the parameters of the current pulse signal. Thus, the correspondence of the dose rate of the electron beam to the parameters of the induced signal reflecting the charge of the particle beam can be obtained by calibrating the scale.
The faraday cup provides a direct current measurement and serves as an absolute calibration standard that can be used to cross-calibrate other measurement equipment. A cup made of conductive material is inserted into the beam path. When the beam is flowing, all the collected charge is discharged by the current-to-voltage converter. The detected signal is processed by an integrator to estimate the beam charge.
Calibration can also be performed as follows: fixing the energy of the electron beam; the output electron beam is emitted into a water tank, and a probe is placed in the water tank and used for measuring dosage; simultaneously reading parameters of a current pulse signal induced in the current transformer; the dose of a single electron beam pulse is obtained in relation to the parameters of the corresponding current pulse signal.
According to the corresponding relation obtained by the calibration scale, the dosage of each electron beam pulse can be obtained from the parameters of the current pulse signal corresponding to the electron beam pulse. The total dose can be obtained by adding up the calculation. The embodiment of the utility model provides an in, current pulse signal draws forth a pulse collection circuit through pulse signal outlet port, has FPGA to calculate the dosage according to current pulse signal in the pulse collection circuit.
In some embodiments, inductor 102 may also be an Integrating Current Transformer (ICT). The electron beam pulses of a medical accelerator consist of a number of micro-pulses. For example, if the accelerator tube has an operating frequency of 3GHz and the microwave pulse width is 4 μ s, 12000 micro-pulses are contained in one microwave pulse. When using an integrating current transformer, the measured reading is the amount of charge per micropulse. The proportionality coefficient of the dose of each electron beam pulse to the corresponding charge amount can be obtained by calibrating the scale. The pulse collecting circuit collects current pulse signals, the electric charge amount is accumulated and calculated, and the total dose can be obtained through conversion according to a proportionality coefficient.
The current pulse signal parameters include an amplitude, a pulse width, and a repetition frequency of the current pulse signal.
Fig. 2 shows a schematic structural diagram of the medical device. As shown in fig. 2, the medical apparatus includes an electron gun 201, an acceleration tube 202, a beam line 203, an electron extracting structure 204, a current transformer 206, and a pulse collecting circuit 207. The electron extraction structure 204 is provided with a beam current needle 205, and the beam current needle 205 can be directly inserted into the bad tissue of the patient and directly contacts with the bad tissue; the beam needle 205 may also be extended into the patient through a cannula inserted into the patient without direct contact with the patient's tissue. Electrons are emitted from the beam needle 205 to ablate the defective tissue.
As shown in fig. 3, the medical device may further comprise a dose controller 104. When the real-time dose is greater than or equal to a predetermined threshold, the dose controller 104 stops outputting the particle beam. In some embodiments, there are multiple sensors and processors, and the dose controller 104 stops outputting the particle beam when the real-time dose of any one of the paths is greater than or equal to a predetermined threshold.
For safety reasons, to avoid the malfunction of the current transformer 206, in one embodiment, the number of the current transformers 206 is two, and the current transformers are respectively a first current transformer and a second current transformer, the first current transformer is sleeved on the beam current pipeline, and the second current transformer is sleeved on the first current transformer. The processor obtains a first real-time dose according to the dose and parameters of a current pulse signal of the first current transformer. And the processor acquires a second real-time dose according to the dose and the parameters of the current pulse signal of the second current transformer. When the first real-time dose or the second real-time dose is larger than or equal to a preset threshold value, the dose controller controls the electronic linear accelerator to stop outputting the electron beams, so that the damage to a patient caused by the fact that the accumulated dose cannot be obtained in time due to the failure of one current transformer can be avoided.
The embodiment of the utility model provides an in, current transformer cover is outside the line of restrainting pipeline to do not influence the passing through of line of restrainting, can not cause the loss of line of restrainting, consequently compare and help improving dosage transmission efficiency in traditional mode. The whole process that the electron beam leaves the accelerating tube and reaches the tumor is transmitted in the pipeline without passing through the ionization chamber, so the electron beam irradiation device is suitable for novel electron beam after-loading equipment, and can realize real-time dose monitoring in the beam process.
Fig. 4 shows a block diagram of a dose real-time monitoring device for a medical electronic linear accelerator according to an embodiment of the present invention. As shown in fig. 4, the device for monitoring dosage of a medical electron linear accelerator in real time comprises a sensor 402 and a processor 403.
The medical electron linear accelerator 401 has an accelerating tube, and a beam pipeline is arranged at an outlet of the accelerating tube.
And the inductor 402 is sleeved on the beam pipeline and generates a signal for reflecting the electron beam charge in real time through inductive or capacitive coupling.
The processor 403 obtains the corresponding dose according to the signal reflecting the charge of the electron beam.
For safety, to avoid the sensor 402 from malfunctioning, in an embodiment, the number of the sensors 402 is two, and the sensors are respectively a first sensor and a second sensor, the first sensor is sleeved on the beam pipeline, the second sensor is sleeved on the first sensor, the processor obtains a first real-time dose according to a corresponding relationship between the dose and a signal of the first sensor, which reflects the electron beam charge, and the processor obtains a second real-time dose according to a corresponding relationship between the dose and a signal of the second sensor, which reflects the electron beam charge.
In one embodiment, the sensor is a current transformer, the signal reflecting the electron beam charge is a current pulse signal, and the processor obtains the real-time dose by accumulation calculation according to the preset corresponding relationship between the dose and the parameter of the current pulse signal.
The processor is connected with the dose controller, and when the real-time dose is greater than or equal to a preset threshold value, the processor sends an instruction for stopping outputting the electron beam to the dose controller.
As shown in fig. 5, the real-time dose monitoring device for a medical electron linear accelerator may further include a dose controller 404. When the real-time dose is greater than or equal to a preset threshold, the processor 403 instructs the dose controller 404 to stop outputting the particle beam.
The device for monitoring the dose of the medical electron linear accelerator in real time can further comprise an electron leading-out structure, wherein a beam needle is arranged on the electron leading-out structure, and can be directly inserted into the bad tissue of a patient and directly contacted with the bad tissue; the beam needle may also extend into the patient through a cannula inserted into the patient without making direct contact with the patient's tissue. Electrons are emitted by the beam needle to ablate bad tissues. .
Fig. 6 shows a block diagram of a device for monitoring dosage of a medical particle accelerator in real time according to an embodiment of the present invention. As shown in fig. 6, the device for monitoring the dose of a medical particle accelerator in real time comprises a sensor 602 and a processor 603.
The medical particle accelerator 601 has an acceleration tube.
The sensor 602 is disposed at the exit of the accelerating tube, and generates a corresponding current pulse signal according to the particle beam at the exit of the accelerating tube.
The processor 603 is configured to obtain real-time doses based on parameters of the current pulse signal.
In one embodiment, the processor 603 obtains the real-time dose by performing an accumulation calculation according to a preset dose-to-current pulse signal parameter correspondence. As shown in fig. 7, the real-time dose monitoring device for a medical particle accelerator may further include a dose controller 604. When the real-time dose is greater than or equal to a preset threshold, the processor 603 instructs the dose controller 604 to stop outputting the particle beam.
To avoid failure of the sensors 602 for safety, in one embodiment, the number of the sensors 602 is two, i.e., a first sensor and a second sensor, the first sensor is sleeved on the beam line, and the second sensor is sleeved on the first sensor. The processor obtains a first real-time dose according to the dose and the parameters of the current pulse signal of the first sensor. The processor obtains a second real-time dose according to the dose and the parameters of the current pulse signal of the second sensor. When the first real-time dose or the second real-time dose is larger than or equal to a preset threshold value, the dose controller controls the medical particle accelerator to stop outputting the electron beams, so that the injury to a patient caused by the fact that accumulated doses cannot be obtained in time due to failure of one sensor can be avoided.
Fig. 8 shows a block diagram of a dose control system of a medical electron linear accelerator according to an embodiment of the present invention. The medical electron linear accelerator 901 includes an acceleration tube. As shown in fig. 8, the medical electron linear accelerator dose control system includes a dose controller 904, a sensor 902, and a processor 903.
The dose controller 904 is used to control the output of the electron beam of the medical electron linac 901.
The sensor 902 is disposed at the exit of the acceleration tube and inductively or capacitively couples the signal reflecting the electron beam charge generated in real time.
The inductor 902 may be a current transformer or an integrating current transformer, and is sleeved on the beam pipeline at the outlet of the acceleration tube.
The processor 903 is used to obtain the real-time dose from parameters of the signal that reflect the electron beam charge.
In one embodiment, the signal reflecting the electron beam charge is a current pulse signal. The medical electron linac dose control system may include a pulse collection circuit for collecting the current pulse signal from the sensor 902 and calculating the real-time dose from the current pulse signal.
When the real-time dose is greater than or equal to a preset threshold, the dose controller 904 controls the medical electron linear accelerator 901 to stop outputting the electron beam.
For safety, to avoid the failure of the sensors 902, in one embodiment, the number of the sensors 902 is two, and the sensors are a first sensor and a second sensor, respectively, the first sensor is sleeved on the beam line at the outlet of the acceleration tube, and the second sensor is sleeved on the first sensor; the processor obtains a first real-time dose according to the corresponding relation between the dose and the signal of the first sensor for reflecting the electron beam charge; the processor obtains a second real-time dose according to the corresponding relation between the dose and the signal of the second sensor for reflecting the electron beam charge; when the first real-time dose or the second real-time dose is larger than or equal to a preset threshold value, the dose controller controls the electron linear accelerator to stop outputting the electron beams, so that the injury to a patient caused by the fact that accumulated doses cannot be obtained in time due to failure of one sensor can be avoided.
It is understood that in the embodiments of the medical device, the "sensor is provided in the vacuum chamber", the type and operation of the sensor, and the calibration of the dose to parameter response of the signal of the charge of the particle beam are also suitable for other embodiments, and will not be repeated here.
Claims (22)
1. A medical device, comprising:
the particle accelerator comprises an accelerating tube and a beam pipeline connected with the outlet of the accelerating tube;
the inductor is arranged at the periphery of the beam pipeline and generates a signal for reacting the charge of the particle beam in real time through inductive or capacitive coupling;
a processor for obtaining a corresponding dose according to the signal of the charge of the reactive particle beam.
2. The medical apparatus of claim 1, wherein the particle accelerator is one of a medical electron linear accelerator, a medical proton accelerator, and a medical heavy ion accelerator.
3. The medical device of claim 2, wherein the sensor is a current transformer, the sensor is sleeved on the beam conduit, and the signal reflecting the charge of the particle beam is a current pulse signal.
4. The medical device of claim 3, further comprising a pulse collection circuit for collecting a current pulse signal from the inductor; and the processor calculates the real-time dose according to the corresponding relation between the dose and the parameters of the current pulse signal.
5. The medical device of claim 1, wherein the number of the sensors is two, and the sensors are a first sensor and a second sensor, the first sensor is sleeved on the beam conduit, the second sensor is sleeved on the first sensor, the processor obtains a first real-time dose according to a corresponding relationship between a dose and a signal of the charge of the reactive particle beam of the first sensor, and the processor calculates a second real-time dose according to a corresponding relationship between a dose and a signal of the charge of the reactive particle beam of the second sensor.
6. The medical apparatus of any one of claims 1 to 5, wherein the processor obtains the real-time dose by an accumulation calculation according to a preset dose corresponding to a signal parameter of the charge of the reactive particle beam.
7. The medical apparatus of claim 6, further comprising a dose controller that stops outputting the particle beam when the real-time dose is greater than or equal to a preset threshold.
8. The medical device of claim 1, further comprising a particle extraction structure having a beam needle, wherein the particles are ejected from the beam needle directly into the patient or through a cannula into the patient to ablate the unwanted tissue.
9. The utility model provides a dose monitoring device, is applied to real-time supervision medical electron linear accelerator dose, electron linear accelerator has the accelerating tube, the export of accelerating tube is provided with the beam pipeline, its characterized in that, dose monitoring device includes:
the inductor is sleeved on the beam pipeline and generates a signal for reflecting the electron beam charge in real time through inductive or capacitive coupling;
a processor for obtaining a corresponding dose from the signal reflecting the electron beam charge.
10. The apparatus of claim 9, wherein the sensor is a current transformer, the sensor is sleeved on the beam conduit, and the signal reflecting the charge of the electron beam is a current pulse signal.
11. The apparatus according to claim 9, wherein the number of the sensors is two, and the sensors are a first sensor and a second sensor, respectively, the first sensor is sleeved on the beam conduit, the second sensor is sleeved on the first sensor, the processor obtains a first real-time dose according to a correspondence between a dose and a signal of the first sensor reflecting electron beam charges, and the processor obtains a second real-time dose according to a correspondence between a dose and a signal of the second sensor reflecting electron beam charges.
12. The device of claim 10, wherein the processor obtains the real-time dose by an accumulation calculation according to a preset dose corresponding to a parameter of the current pulse signal.
13. The apparatus of claim 12, wherein the processor is coupled to the dose controller, and the processor instructs the dose controller to stop outputting the electron beam when the real-time dose is greater than or equal to a predetermined threshold.
14. The device of claim 9, further comprising an electron extraction structure having a beam needle, wherein electrons are emitted from the beam needle directly inserted into the patient or through a cannula extending into the patient to ablate the unwanted tissue.
15. A dose monitoring device for use in monitoring the dose of a medical particle accelerator in real time, the particle accelerator having an accelerator tube, the dose monitoring device comprising:
the inductor is arranged at the outlet of the accelerating tube and generates a corresponding current pulse signal according to the electron beam at the outlet of the accelerating tube;
and the processor is used for acquiring real-time dose according to the parameters of the current pulse signals.
16. The device of claim 15, wherein the processor obtains the real-time dose by an accumulation calculation according to a preset dose corresponding to a parameter of the current pulse signal.
17. The device of claim 16, wherein the number of the sensors is two, and the sensors are a first sensor and a second sensor, the first sensor is sleeved on the beam pipeline at the outlet of the accelerating tube, the second sensor is sleeved on the first sensor, the processor obtains a first real-time dose according to the dose and parameters of current pulse signals of the first sensor, and the processor obtains a second real-time dose according to the dose and parameters of current pulse signals of the second sensor.
18. The apparatus of any one of claims 15 to 17, wherein the processor is connected to a dose controller, and when the real-time dose is greater than or equal to a predetermined threshold, the processor instructs the dose controller to stop outputting the particle beam.
19. A dose control system for a medical electron linear accelerator, the electron linear accelerator comprising an accelerator tube, the system comprising:
a dose controller for controlling the output of the electron beam of the electron linear accelerator;
the inductor is arranged at the outlet of the accelerating tube and used for generating a signal for reflecting electron beam charges in real time through inductive or capacitive coupling;
the processor is used for acquiring real-time dosage according to the parameters of the signal reflecting the electron beam charge;
and when the real-time dose is greater than or equal to a preset threshold value, the dose controller controls the electron linear accelerator to stop outputting the electron beams.
20. The control system of claim 19, wherein the number of the inductors is two, and the two inductors are respectively a first inductor and a second inductor, the first inductor is sleeved on the beam current pipeline at the outlet of the accelerating tube, and the second inductor is sleeved on the first inductor; the processor obtains a first real-time dose according to the corresponding relation between the dose and the signal of the reaction electron beam charge of the first sensor; the processor obtains a second real-time dose according to the corresponding relation between the dose and the signal of the reaction electron beam charge of the second sensor; and when the first real-time dose or the second real-time dose is larger than or equal to a preset threshold, the dose controller controls the electron linear accelerator to stop outputting the electron beam.
21. The control system of claim 20, wherein the sensor is a current transformer, the sensor is sleeved on the beam conduit, and the signal reflecting the charge of the electron beam is a current pulse signal.
22. The control system of claim 21, further comprising a pulse collection circuit for collecting a current pulse signal from the inductor; and the processor acquires the real-time dose according to the corresponding relation between the dose and the parameters of the signals reflecting the electron beam charges.
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| CN201920255873.5U CN210119575U (en) | 2019-02-28 | 2019-02-28 | Medical equipment, dose monitoring device and dose control system of electronic linear accelerator |
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| CN114721027A (en) * | 2022-06-09 | 2022-07-08 | 中国科学院近代物理研究所 | High-precision ultrahigh irradiation dose rapid measuring device |
| WO2022166629A1 (en) * | 2021-02-02 | 2022-08-11 | 湖州超群电子科技有限公司 | Electron beam irradiation beam detection system and use method therefor |
| CN115220080A (en) * | 2022-06-29 | 2022-10-21 | 华中科技大学 | Online dose monitoring method and system in particle therapy |
| CN115645761A (en) * | 2022-12-28 | 2023-01-31 | 广东省新兴激光等离子体技术研究院 | Tumor radiotherapy equipment and control method thereof |
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| WO2022166629A1 (en) * | 2021-02-02 | 2022-08-11 | 湖州超群电子科技有限公司 | Electron beam irradiation beam detection system and use method therefor |
| CN114721027A (en) * | 2022-06-09 | 2022-07-08 | 中国科学院近代物理研究所 | High-precision ultrahigh irradiation dose rapid measuring device |
| CN114721027B (en) * | 2022-06-09 | 2022-08-23 | 中国科学院近代物理研究所 | High-precision ultrahigh irradiation dose rapid measuring device |
| CN115220080A (en) * | 2022-06-29 | 2022-10-21 | 华中科技大学 | Online dose monitoring method and system in particle therapy |
| CN115220080B (en) * | 2022-06-29 | 2023-03-28 | 华中科技大学 | Online dose monitoring method and system in particle therapy |
| CN115645761A (en) * | 2022-12-28 | 2023-01-31 | 广东省新兴激光等离子体技术研究院 | Tumor radiotherapy equipment and control method thereof |
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