CN110339492A - Dual intensity power spectrum CBCT image acquisition system - Google Patents
Dual intensity power spectrum CBCT image acquisition system Download PDFInfo
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- 238000003384 imaging method Methods 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims description 24
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/103—Treatment planning systems
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1048—Monitoring, verifying, controlling systems and methods
- A61N5/1049—Monitoring, verifying, controlling systems and methods for verifying the position of the patient with respect to the radiation beam
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1048—Monitoring, verifying, controlling systems and methods
- A61N5/1049—Monitoring, verifying, controlling systems and methods for verifying the position of the patient with respect to the radiation beam
- A61N2005/1054—Monitoring, verifying, controlling systems and methods for verifying the position of the patient with respect to the radiation beam using a portal imaging system
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1048—Monitoring, verifying, controlling systems and methods
- A61N5/1049—Monitoring, verifying, controlling systems and methods for verifying the position of the patient with respect to the radiation beam
- A61N2005/1061—Monitoring, verifying, controlling systems and methods for verifying the position of the patient with respect to the radiation beam using an x-ray imaging system having a separate imaging source
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Abstract
The application discloses a kind of dual intensity power spectrum CBCT image acquisition system, comprising: angular transducer is configured to the rotation angle information of detection rotary frame；Dual intensity power spectrum CBCT timing synchronization controller is configured to generate trigger signal according to rotation angle information；X-ray machine sequence controller is configured to generate the energy switch-over control signal for controlling X-ray machine switching energy state according to trigger signal；Dual intensity X-ray machine is configured to switch between upper state and low-energy state according at least to energy switch-over control signal；Flat panel detector is configured to obtain dual intensity X-ray machine according to trigger signal in the exposure image under upper state or obtains exposure image of the dual intensity X-ray machine under low-energy state.The application is by way of introducing dual intensity power spectrum CBCT timing synchronization controller and X-ray machine sequence controller, it controls the timesharing of dual intensity X-ray machine and generates high energy and low power beam, dual-energy imaging technology is realized using a set of X-ray machine and flat panel detector, that is, ensures image quality, also reduces cost.
Description
Technical Field
The application relates to the technical field of medical equipment, in particular to a dual-energy-spectrum CBCT image acquisition system.
Background
Radiotherapy is used as a means for treating cancer, the technology is more and more mature, the requirement on precision of a new treatment means is higher and higher, and radiotherapy gradually enters a 'three-essence' era of precise positioning, precise planning and precise treatment. Three-dimensional image registration based on CBCT images is increasingly used for positioning of patients and target areas for radiotherapy. Image-guided radiotherapy based on CBCT mainly comprises three steps: image acquisition, image reconstruction and image registration. Image acquisition is the basis of whole image-guided radiotherapy, and the quality of acquired images directly influences the reconstruction and registration of the images.
In order to improve the image acquisition quality, a dual-energy imaging system (dual-energy spectrum CBCT can effectively improve the image quality, and since human tissues have different attenuation effects on rays with different energies, the dual-energy spectrum CBCT can set different tube voltages for different tissues so as to achieve a better contrast effect of a shot image) is provided in the prior art, and two independent X-ray sources capable of generating high and low two different energies and two sets of detectors responding to different energy spectrums are adopted (for example, the following patent application: patent application No. 201710491286.1, named as a turntable mechanism for CBCT medical three-dimensional imaging). However, since two X-ray sources and two detectors are required, the cost of the image acquisition system is greatly increased, and the volume of the apparatus is also increased.
Disclosure of Invention
The embodiment of the present application provides a dual-energy spectrum CBCT image acquisition system, which is used to solve at least one of the above technical problems.
The embodiment of the application provides a dual-energy spectrum CBCT image acquisition system, including:
an angle sensor configured to detect rotation angle information of the rotating gantry;
the dual-energy spectrum CBCT timing synchronization controller is configured to generate a trigger signal according to the rotation angle information; the dual-energy-spectrum CBCT timing synchronization controller can be realized by relying on a processor device in the prior art (for example, a processor for controlling an X-ray machine to generate light beams in the prior CBCT device) and assisting a software control algorithm, so that additional hardware does not need to be introduced.
The X-ray machine time schedule controller is configured to generate an energy switching control signal for controlling the X-ray machine to switch the energy state according to the trigger signal; the X-ray machine timing controller can be realized by relying on a processor device in the prior art (for example, a processor for controlling the X-ray machine to generate light beams in the existing CBCT device) and assisting a software control algorithm, so that additional hardware does not need to be introduced.
A dual-energy X-ray machine configured to switch between a high-energy state and a low-energy state at least according to the energy switching control signal;
and the flat panel detector is configured to acquire an exposure image of the dual-energy X-ray machine in a high-energy state or acquire an exposure image of the dual-energy X-ray machine in a low-energy state according to the trigger signal.
According to the embodiment of the application, the dual-energy spectrum CBCT timing sequence synchronous controller and the X-ray machine timing sequence controller are introduced to control the dual-energy X-ray machine to generate high-energy and low-energy light beams in a time-sharing mode, and only one flat panel detector is used for detecting and imaging an X-ray beam signal, so that the dual-energy imaging technology is realized by only one set of X-ray machine and the flat panel detector, the imaging quality is ensured, and the imaging cost is also reduced.
In some embodiments, the generating a trigger signal according to the rotation angle information comprises: and the double-energy spectrum CBCT time sequence synchronous controller generates a trigger signal every time the rotating rack rotates by a set angle. In the embodiment of the application, 10 images are acquired every second, the accelerator rotates for one circle for 600 frames, and one image is acquired every 0.6 degrees. So the trigger period is 0.1 second and the trigger angle is acquired one sheet per 0.6 degrees.
In some embodiments, said switching between a high energy state and a low energy state in accordance with at least said energy switching control signal comprises: and switching between a high-energy state and a low-energy state according to the rotation angle information and the energy switching control signal.
In some embodiments, the switching between the high energy state and the low energy state according to the rotation angle information and the energy switching control signal comprises:
judging whether the rotating rack rotates by a set angle according to the rotating angle information, and taking the judgment result as a first judgment result;
judging the type of the energy switching control signal, wherein the type comprises a high-energy state type and a low-energy state type;
when the first judgment result is positive and the type is a high-energy state type, the dual-energy X-ray machine is switched to a high-energy state to work;
and when the first judgment result is positive and the type is a low-energy state type, switching the dual-energy X-ray machine to a low-energy state for working.
In the embodiment of the application, when the X-ray machine is controlled to switch between the high-energy state and the low-energy state to realize dual-energy imaging, not only the energy switching control signal generated by the X-ray machine time schedule controller is considered, but also the original signal rotation angle information is considered, so that the time for switching the states at each time can be ensured to be reliable and effective.
Because, the inventor finds in the process of implementing the present application that the triggering mechanism of the energy switching control signal is only the rising edge of the high level for triggering, and since the system itself is easily affected by electromagnetic interference or short-time peak current or voltage, the rising edge of the abnormal high level may temporarily appear, and if it is only based on this, it may cause the X-ray machine to switch between the high and low energy states erroneously, so as to affect the final imaging quality.
In some embodiments, the acquiring an exposure image of the dual-energy X-ray machine in a high-energy state or acquiring an exposure image of the dual-energy X-ray machine in a low-energy state according to the trigger signal includes:
the flat panel detector enters an integral state according to the trigger signal and scans and images the detected light beam signal irradiated by the dual-energy X-ray machine;
when the beam signal is a high-energy beam signal, scanning and imaging to obtain an exposure image of the dual-energy X-ray machine in a high-energy state;
and when the beam signal is a low-energy beam signal, the exposure image of the dual-energy X-ray machine in a low-energy state is obtained by scanning and imaging.
In some embodiments, the time for each integration is greater than the time for each irradiation of a high energy beam or a low energy beam by the dual energy X-ray machine.
In some embodiments, further comprising: the accelerator is configured to drive the rotating rack to rotate, and the angle sensor, the double-energy spectrum CBCT time sequence synchronous controller, the X-ray machine time sequence controller, the double-energy X-ray machine and the flat panel detector are installed on the rotating bracket and rotate along with the rotation of the rotating bracket.
In some embodiments, further comprising: and the PC is configured to receive the exposure image acquired by the flat panel detector and process the exposure image.
In some embodiments, further comprising: and the accelerator keyboard is configured to control the accelerator to work according to the operation of a user so as to drive the rotating bracket to rotate.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic block diagram of an embodiment of a dual-energy spectrum CBCT image acquisition system of the present application;
FIG. 2 is a schematic block diagram of another embodiment of a dual-energy spectrum CBCT image acquisition system of the present application;
FIG. 3 is a schematic diagram illustrating an embodiment of an operation process of the dual-energy spectrum CBCT image acquisition system according to the present disclosure;
fig. 4 is a timing diagram illustrating key components of the dual-energy spectrum CBCT image acquisition system according to the present disclosure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
In this application, "system," "device," "module," and the like refer to a computer-related entity, either hardware, a combination of hardware and software, or software in execution. In particular, for example, an element may be, but is not limited to being, a process running on a processor, an object, an executable, a thread of execution, a program, and/or a computer. Also, an application or script running on a server, or a server, may be an element. One or more elements may be in a process and/or thread of execution and an element may be localized on one computer and/or distributed between two or more computers and may be operated by various computer-readable media. The elements may also communicate by way of local and/or remote processes based on a signal having one or more data packets, e.g., from a data packet interacting with another element in a local system, distributed system, and/or across a network in the internet with other systems by way of the signal.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
As shown in fig. 1, an embodiment of the present application provides a dual-energy spectrum CBCT image acquisition system, including:
an angle sensor 01 configured to detect rotation angle information of the rotating gantry;
the dual-energy spectrum CBCT timing synchronization controller 02 is configured to generate a trigger signal according to the rotation angle information; the dual-energy-spectrum CBCT timing synchronization controller can be realized by relying on a processor device in the prior art (for example, a processor for controlling an X-ray machine to generate light beams in the prior CBCT device) and assisting a software control algorithm, so that additional hardware does not need to be introduced.
The X-ray machine time schedule controller 03 is configured to generate an energy switching control signal for controlling the X-ray machine to switch the energy state according to the trigger signal; the X-ray machine timing controller can be realized by relying on a processor device in the prior art (for example, a processor for controlling the X-ray machine to generate light beams in the existing CBCT device) and assisting a software control algorithm, so that additional hardware does not need to be introduced.
The dual-energy X-ray machine 04 is configured to switch between a high-energy state and a low-energy state at least according to the energy switching control signal;
the flat panel detector 05 is configured to acquire an exposure image of the dual-energy X-ray machine in a high-energy state or acquire an exposure image of the dual-energy X-ray machine in a low-energy state according to the trigger signal.
According to the embodiment of the application, the dual-energy spectrum CBCT timing sequence synchronous controller and the X-ray machine timing sequence controller are introduced to control the dual-energy X-ray machine to generate high-energy and low-energy light beams in a time-sharing mode, and only one flat panel detector is used for detecting and imaging an X-ray beam signal, so that the dual-energy imaging technology is realized by only one set of X-ray machine and the flat panel detector, the imaging quality is ensured, and the imaging cost is also reduced.
In some embodiments, the generating a trigger signal according to the rotation angle information comprises: and the double-energy spectrum CBCT time sequence synchronous controller generates a trigger signal every time the rotating rack rotates by a set angle. In the embodiment of the application, 10 images are acquired every second, the accelerator rotates for one circle for 600 frames, and one image is acquired every 0.6 degrees. So the trigger period is 0.1 second and the trigger angle is acquired one sheet per 0.6 degrees.
In some embodiments, said switching between a high energy state and a low energy state in accordance with at least said energy switching control signal comprises: and switching between a high-energy state and a low-energy state according to the rotation angle information and the energy switching control signal.
In some embodiments, the switching between the high energy state and the low energy state according to the rotation angle information and the energy switching control signal comprises:
judging whether the rotating rack rotates by a set angle according to the rotating angle information, and taking the judgment result as a first judgment result;
judging the type of the energy switching control signal, wherein the type comprises a high-energy state type and a low-energy state type;
when the first judgment result is positive and the type is a high-energy state type, the dual-energy X-ray machine is switched to a high-energy state to work;
and when the first judgment result is positive and the type is a low-energy state type, switching the dual-energy X-ray machine to a low-energy state for working.
In the embodiment of the application, when the X-ray machine is controlled to switch between the high-energy state and the low-energy state to realize dual-energy imaging, not only the energy switching control signal generated by the X-ray machine time schedule controller is considered, but also the original signal rotation angle information is considered, so that the time for switching the states at each time can be ensured to be reliable and effective.
Because, the inventor finds in the process of implementing the present application that the triggering mechanism of the energy switching control signal is only the rising edge of the high level for triggering, and since the system itself is easily affected by electromagnetic interference or short-time peak current or voltage, the rising edge of the abnormal high level may temporarily appear, and if it is only based on this, it may cause the X-ray machine to switch between the high and low energy states erroneously, so as to affect the final imaging quality.
In some embodiments, the acquiring an exposure image of the dual-energy X-ray machine in a high-energy state or acquiring an exposure image of the dual-energy X-ray machine in a low-energy state according to the trigger signal includes:
the flat panel detector enters an integral state according to the trigger signal and scans and images the detected light beam signal irradiated by the dual-energy X-ray machine;
when the beam signal is a high-energy beam signal, scanning and imaging to obtain an exposure image of the dual-energy X-ray machine in a high-energy state;
and when the beam signal is a low-energy beam signal, the exposure image of the dual-energy X-ray machine in a low-energy state is obtained by scanning and imaging.
Fig. 2 is a schematic diagram of another embodiment of a dual-energy spectrum CBCT image acquisition system according to the present application, which mainly includes: the system comprises an accelerator, an accelerator angle sensor, a double-energy spectrum CBCT time sequence synchronous controller, an accelerator control keyboard, a double-energy X-ray machine, an X-ray machine time sequence controller, a flat panel detector, a treatment bed and a PC. Wherein:
the accelerator 1, when acquiring a dual-energy spectrum CBCT image, rotates about the gantry rotation axis through the isocenter.
The angle sensor 2 is generally mounted on the accelerator frame, and when the accelerator frame rotates, the angle sensor feeds back the angle information of the accelerator frame.
The dual-energy spectrum CBCT time sequence synchronous controller 3 is generally arranged on an accelerator frame and is connected with an accelerator frame angle sensor, receives an angle signal of the angle sensor, modulates a synchronous signal to an X-ray machine and a flat panel detector, and synchronously acquires and exposes time sequences of the X-ray machine.
The X-ray machine 4 is arranged on the accelerator frame, and the center of the beam, the rotating shaft of the accelerator and the center of the beam of the accelerator are intersected at the same point, namely the treatment isocenter of the accelerator;
the X-ray machine time schedule controller 5 is a component of the X-ray machine and can modulate high-energy and low-energy pulse information so as to control the X-ray machine to be rapidly switched between double-energy rays;
a treatment bed 6, an experimental model body or a patient is placed on the bed;
and the flat panel detector 7 is installed on the frame of the accelerator.
FIG. 3 is a flow chart of a dual-energy spectrum CBCT image acquisition system, wherein the acquisition process is divided into five steps; the method comprises the following steps of starting a double-energy-spectrum CBCT image acquisition system at a PC end to connect all components. And secondly, setting key parameters of the operation of each component. And thirdly, preparing the dual-energy spectrum CBCT system for exposure. And fourthly, exposing and acquiring images by using the dual-energy spectrum CBCT system. And fifthly, finishing the work of the dual-energy spectrum CBCT system.
The first step is as follows:
the dual-energy spectrum CBCT software is started, the system is automatically connected with each component, the connection communication mode is determined according to specific components, the flat panel detector needs to transmit image data, gigabit Ethernet communication is generally used, and the keyboard is connected to the dual-energy spectrum CBCT timing sequence synchronous controller through IO.
The second step is that:
after the software connection is successful, the system needs to set the key parameters of the component. Wherein,
the accelerator 1 needs to set motion parameters which are respectively a starting position, an ending position and a rotating speed, wherein the starting position and the ending position control the rotating range of the accelerator, and an angle in the rotating process is fed back to the double-energy-spectrum CBCT time sequence synchronous controller for processing 3 through the angle sensor 2;
the dual-energy spectrum CBCT timing synchronization controller 3 needs to set the pulse number of the acquired image, and the dual-energy spectrum CBCT timing synchronization controller 3 modulates the pulse frequency by combining the feedback information of the angle sensor 2 so as to serve the subsequent acquisition;
the X-ray machine 4 needs to set two groups of parameters of high energy and low energy, namely voltage kV, current mA and time ms;
the main parameters to be set by the flat panel detector 7 are integration time and resolution.
The third step:
after the second step of setting parameters is completed, the exposure preparation process can be started. Firstly, after the parameters are successfully set, the dual-energy spectrum CBCT image acquisition system can start the X-ray machine 4 to work, and after the X-ray machine 4 is started to work, the components can feed back relevant working state information, such as Prepare, Ready, Exposure, and the like. Then the user presses the Ready button through the accelerator keyboard 9, the DECBCT time sequence synchronous controller 3 receives the Ready information of the key and transmits the Ready information to the X-ray machine 4, the state of the Ready information received by the X-ray machine 4 is changed into the Prepare state, the Prepare state is fed back to the PC machine 8 immediately, and the PC machine 8 starts the flat panel detector 7 to work after receiving the Prepare information. After the state of the X-ray machine 4 is changed into Prepare, the anode of the bulb tube rotates, the filament is preheated, the process needs a certain time for establishment, the general X-ray machine 4 is about 1.5 seconds, then the state of the X-ray machine 4 is changed into the Ready state, the Ready state is fed back to the PC machine 8, and the PC machine 8 displays the Ready state information.
The fourth step:
after observing Ready information of the PC machine 8, a user can press a Beam On button of an accelerator, a DECBCT time sequence synchronous controller sends a command to the accelerator 1 after receiving the key information, the accelerator 1 starts to rotate and sends angle information to the DECBCT time sequence synchronous controller 3 through an angle sensor 2, the DECBCT time sequence synchronous controller 7 modulates synchronous pulse signals to an X-ray machine time sequence controller 5 and a flat panel detector 7, the signals received by the X-ray machine time sequence controller 5 are further processed to modulate high-energy and low-energy working signals triggering the X-ray machine 4, then the X-ray machine 4 switches parameters such as voltage, current and time and sends corresponding high-energy or low-energy X-rays, meanwhile, when the X-ray machine 4 sends back signals to the PC machine 8, and the PC machine 8 displays the Beam output state; the flat panel detector 7 enters an integral state after receiving a synchronous signal of the DECBCT time sequence synchronous controller 3, the integral time is generally more than or equal to the beam-out time of the X-ray machine 4, the flat panel detector 7 starts to scan and read images after the integral is completed, image information is transmitted to the PC 8 after the image information is read, and the PC 8 performs subsequent processing on the images; the process of sending out a synchronization signal from the DECBCT timing synchronization controller 3 to the transfer of the picture to the PC 8 is a cyclic process, and if the user needs to terminate the acquisition process accidentally during this process, the fifth step is performed.
The fifth step:
after receiving the stop signal, the PC 8 controls the resetting of each component of the system, and after the resetting is completed, the acquisition task of the whole system is completed.
Fig. 4 is a timing diagram of key components. The DECBCT timing synchronization controller 3 modulates a high-low level signal after receiving the feedback angle of the angle sensor 2, the low level signal is triggered as shown in the figure, and the X-ray machine timing synchronization controller 5 generates a corresponding high-low level signal after receiving the low level signal, wherein the high level signal represents a high-energy state of the X-ray machine 4, and the low level signal represents a low-energy state of the X-ray machine 4. As shown in the figure, the X-ray machine 4 firstly triggers to rapidly switch to a high-energy state according to the level signals of the above components, and then emits an X-ray beam; when the exposure is triggered next time, the system is triggered to be rapidly switched to a low-energy state, and then an X-ray beam is emitted; high-energy and low-energy exposures are triggered cyclically in sequence. When the flat panel detector 7 triggers the acquisition, a complete period includes an integration time and a scanning reading time, and as shown in the figure, the integration time needs to be greater than or equal to the switching energy and the exposure time of the X-ray machine 4, so that the acquired image is ensured to be complete image information.
It should be noted that, for simplicity of description, the method steps involved in the foregoing embodiments are all described as a series of combined actions, but those skilled in the art should understand that the present application is not limited by the described order of actions, as some steps may be performed in other orders or simultaneously according to the present application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required in this application. In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (9)
1. A dual-energy spectrum CBCT image acquisition system comprises:
an angle sensor configured to detect rotation angle information of the rotating gantry;
the dual-energy spectrum CBCT timing synchronization controller is configured to generate a trigger signal according to the rotation angle information;
the X-ray machine time schedule controller is configured to generate an energy switching control signal for controlling the X-ray machine to switch the energy state according to the trigger signal;
a dual-energy X-ray machine configured to switch between a high-energy state and a low-energy state at least according to the energy switching control signal;
and the flat panel detector is configured to acquire an exposure image of the dual-energy X-ray machine in a high-energy state or acquire an exposure image of the dual-energy X-ray machine in a low-energy state according to the trigger signal.
2. The system of claim 1, wherein the generating a trigger signal according to the rotation angle information comprises:
and the double-energy spectrum CBCT time sequence synchronous controller generates a trigger signal every time the rotating rack rotates by a set angle.
3. The system of claim 1, wherein said switching between a high energy state and a low energy state in accordance with at least said energy switching control signal comprises: and switching between a high-energy state and a low-energy state according to the rotation angle information and the energy switching control signal.
4. The system of claim 3, wherein the switching between a high energy state and a low energy state based on the rotation angle information and the energy switching control signal comprises:
judging whether the rotating rack rotates by a set angle according to the rotating angle information, and taking the judgment result as a first judgment result;
judging the type of the energy switching control signal, wherein the type comprises a high-energy state type and a low-energy state type;
when the first judgment result is positive and the type is a high-energy state type, the dual-energy X-ray machine is switched to a high-energy state to work;
and when the first judgment result is positive and the type is a low-energy state type, switching the dual-energy X-ray machine to a low-energy state for working.
5. The method according to claim 1, wherein the acquiring the exposure image of the dual-energy X-ray machine in a high-energy state or the acquiring the exposure image of the dual-energy X-ray machine in a low-energy state according to the trigger signal comprises:
the flat panel detector enters an integral state according to the trigger signal and scans and images the detected light beam signal irradiated by the dual-energy X-ray machine;
when the beam signal is a high-energy beam signal, scanning and imaging to obtain an exposure image of the dual-energy X-ray machine in a high-energy state;
and when the beam signal is a low-energy beam signal, the exposure image of the dual-energy X-ray machine in a low-energy state is obtained by scanning and imaging.
6. The system of claim 5, wherein the time for each integration is greater than the time for each irradiation of a high energy beam or a low energy beam by the dual energy X-ray machine.
7. The system of any one of claims 1-6, further comprising: the accelerator is configured to drive the rotating rack to rotate, and the angle sensor, the double-energy spectrum CBCT time sequence synchronous controller, the X-ray machine time sequence controller, the double-energy X-ray machine and the flat panel detector are installed on the rotating bracket and rotate along with the rotation of the rotating bracket.
8. The system of claim 7, further comprising: and the PC is configured to receive the exposure image acquired by the flat panel detector and process the exposure image.
9. The system of claim 7, further comprising: and the accelerator keyboard is configured to control the accelerator to work according to the operation of a user so as to drive the rotating bracket to rotate.
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