Digital reconstruction of radiological image acquisition system and method

Abstract

The present application is about a collection system and method for digitally reconstructing radiological images, and relates to the field of medical technology. The system includes a computer device, a programmable logic controller PLC device, a signal conversion printed circuit board PCB, a first high voltage generator, a second high voltage generator, a third high voltage generator, a first flat panel detector, a second flat panel detector, and a third flat panel detector. The computer device is connected to the PLC device for communication, and the PLC device is connected to the signal conversion PCB for communication, and the signal conversion PCB is respectively connected to the first high voltage generator, the second high voltage generator, the third high voltage generator, the first flat panel detector, the second flat panel detector, and the third flat panel detector. During the operation of the collection device, by using the combination of three groups of equipment, under the control of the PLC device and the redundant signal output of the signal conversion PCB, each group of equipment can be simultaneously exposed and collected to meet the different needs of determining the location of the lesion during the treatment process, and improve the accuracy of lesion positioning.

Description

Technical Field

[0001] The present application relates to the field of medical technology, and in particular to a system and method for collecting digitally reconstructed radiological images. Background Art

[0002] In the field of radiotherapy, in the process of treatment for the purpose of eliminating tumors, an accelerator is usually used to emit high-energy rays, which rotate spherically around the lesion to achieve the purpose of eliminating the tumor. This treatment method requires intermittent positioning of the lesion during the treatment process. During the positioning process, the Digital Reconstructed Radiograph (DRR) technology is used to accurately locate the lesion.

[0003] In the related art, a flat panel detector is usually used as a device for lesion detection to detect the area where the lesion exists. The flat panel detector can display an image based on the plane it detects when connected to a computer device through software, thereby reflecting the location of the lesion in the form of a plane image.

[0004] However, in the related art, only a single or double flat panel detector is used to determine the location of the lesion, and the computer device and the flat panel detector are connected to each other through software connection, which easily leads to a delay in the transmission of the control signal. In this case, the accuracy of the flat panel detector in determining the location of the lesion is poor. Summary of the invention

[0005] This application is about a digital reconstruction radiological image acquisition system and method, which can improve the accuracy of flat panel detectors in determining the location of lesions. The technical solution is as follows:

[0006] On the one hand, a digitally reconstructed radiological image acquisition system is provided, the digitally reconstructed radiological image acquisition system comprising a computer device, a programmable logic controller (PLC) device, a signal conversion printed circuit board (PCB), a first high voltage generator, a second high voltage generator, a third high voltage generator, a first flat panel detector, a second flat panel detector and a third flat panel detector;

[0007] The computer device is communicatively connected with the PLC device, the PLC device is communicatively connected with the signal conversion PCB, and the signal conversion PCB is communicatively connected with the first high voltage generator, the second high voltage generator, the third high voltage generator, the first flat panel detector, the second flat panel detector and the third flat panel detector respectively;

[0008] A computer device, used for sending control data to the PLC device, the control data is used for instructing a target high voltage generator and a target flat panel detector corresponding to the target high voltage generator to work synchronously, the number of the target high voltage generator and the number of the target flat panel detector are the same, the target high voltage generator is selected from the first high voltage generator, the second high voltage generator and the third high voltage generator, and the target flat panel detector is selected from the first flat panel detector, the second flat panel detector and the third flat panel detector;

[0009] A PLC device is used to receive control data; generate control instructions based on control signals, the control instructions are used to directly control a target high voltage generator and a target flat panel detector; and send control instructions to a signal conversion PCB;

[0010] A signal conversion PCB is used to receive control instructions; generate redundant control signals based on the control instructions; and synchronously send redundant control signals to a target high voltage generator and a target flat panel detector;

[0011] The target high voltage generator and the target flat panel detector are used to synchronously receive the redundant control signal and determine their own working states according to the redundant control signal.

[0012] On the other hand, a method for collecting digitally reconstructed radiographic images is provided. The method is applied to a PLC device in a system for collecting digitally reconstructed radiographic images as described in the above embodiment. The method comprises:

[0013] receiving control data sent by the computer device, the control data being used to instruct the target high voltage generator and the target flat panel detector corresponding to the target high voltage generator to work synchronously;

[0014] generating a control instruction based on the control signal, the control instruction being used to directly control a target high voltage generator and a target flat panel detector;

[0015] Send control instructions to the signal conversion PCB.

[0016] The beneficial effects of the technical solution provided by this application include at least:

[0017] Three independent sets of high-voltage generators and corresponding flat-panel detectors are set up in the acquisition device, and corresponding to the high-voltage generators and flat-panel detectors, signal conversion PCBs and PLC devices that can uniformly control the device through hardware are arranged. During the operation of the acquisition device, by using the combination of three sets of equipment, under the control of the PLC device and the redundant signal output of the signal conversion PCB, each set of equipment can be exposed and collected synchronously to meet the different needs of determining the location of the lesion during the treatment process, and improve the accuracy of lesion positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A structural block diagram of a digitally reconstructed radiological image acquisition system provided by an exemplary embodiment of the present application is shown.

[0020] Figure 2 A schematic structural diagram of a signal conversion PCB provided by an exemplary embodiment of the present application is shown.

[0021] Figure 3 A schematic diagram of a digitally reconstructed radiological image acquisition device provided by an exemplary embodiment of the present application is shown.

[0022] Figure 4 A schematic diagram showing the working principle of a signal conversion PCB provided by an exemplary embodiment of the present application is shown. DETAILED DESCRIPTION

[0023] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0024] Figure 1 FIG. 1 shows a structural block diagram of a digital reconstruction radiological image acquisition system provided by an exemplary embodiment of the present application. Figure 1 The digital reconstruction radiological image acquisition system includes a computer device 110, a programmable logic controller PLC device 120, a signal conversion printed circuit board PCB130, a first high voltage generator 141, a second high voltage generator 142, a third high voltage generator 143, a first flat panel detector 151, a second flat panel detector 152, and a third flat panel detector 153. The computer device 110 is connected to the PLC device 120 for communication, the PLC device 120 is connected to the signal conversion PCB130 for communication, and the signal conversion PCB130 is connected to the first high voltage generator 141, the second high voltage generator 142, the third high voltage generator 143, the first flat panel detector 151, the second flat panel detector 152, and the third flat panel detector 153 for communication.

[0025] In an embodiment of the present application, the computer device is implemented as a personal computer, and the PLC device is implemented as a modular PLC controller. There is a communication connection relationship between the personal computer and the PLC controller, and they are implemented as the upper computer and the lower computer of the same control system.

[0026] Figure 2 A schematic diagram of the structure of a signal conversion PCB provided by an exemplary embodiment of the present application is shown, and the signal conversion PCB includes a power input module 201, a filter circuit module 202, an isolation circuit module 203, a level conversion module 204, an STMicroelectronics 205, a communication chip 206, a signal isolation module 207, a clock and reset circuit 208, a logic chip 209, an input and output interface 210, and a safety input interface 211. Optionally, the model of STMicroelectronics is STM32F407VET6, the model of the communication chip is MAX232, and the model of the logic chip is CMC693PR144-L. It should be noted that the above modules are actually implemented as circuit components or a combination of circuit components. Optionally, the signal conversion PCB is directly connected to the high voltage generator and the flat panel detector through a connector.

[0027] Optionally, in an embodiment of the present application, the computer device has an independent power supply; the first high-voltage generator, the second high-voltage generator and the third high-voltage generator are also configured with independent power supplies, and a dedicated power supply module is also provided in the system for supplying power to the PLC device, the signal conversion PCB, the first flat-panel detector, the second flat-panel detector and the third flat-panel detector.

[0028] In the embodiment of the present application, three groups of high-voltage generators and flat-panel detectors are combined as detection equipment in the device. The flat-panel detector is used to directly perform searchlight detection on the lesion. The high-voltage generator is mainly used to generate a stable high-frequency inverted DC high voltage with sufficient power, and provide a rotating anode drive circuit voltage to generate a stable tube current. The combination of the high-voltage generator and the flat-panel detector is the digital radiography (DR) device in the embodiment of the present application, that is, the acquisition device for digital reconstruction of radiological images described in the embodiment of the present application corresponds to 3 groups of DR devices. Optionally, the models of the three high-voltage generators and the corresponding flat-panel detectors are the same; or, the models of the three high-voltage generators and the corresponding flat-panel detectors are different, but the rated voltages during operation are the same. This application does not limit the specific models of the high-voltage generator and the flat-panel detector. It is determined that their rated operating voltages are all 220V AC.

[0029] A computer device is used to send control data to a PLC device, the control data is used to instruct a target high-voltage generator and a target flat-panel detector corresponding to the target high-voltage generator to work synchronously, the number of the target high-voltage generator and the target flat-panel detector are consistent, the target high-voltage generator is selected from a first high-voltage generator, a second high-voltage generator and a third high-voltage generator, and the target flat-panel detector is selected from a first flat-panel detector, a second flat-panel detector and a third flat-panel detector.

[0030] In one example, when the control data indicates that the first high-voltage generator is working, the first flat-panel detector works synchronously with the first high-voltage generator; when the control data indicates that the second high-voltage generator is working, the second flat-panel detector works synchronously with the second high-voltage generator; when the control data indicates that the third high-voltage generator is working, the third flat-panel detector works synchronously with the third high-voltage generator. Optionally, during the system installation process, a linkage relationship is established between the flat-panel detector and the high-voltage generator, and the computer device simultaneously determines the linkage relationship to send a corresponding control instruction.

[0031] The PLC device is used to receive control data; generate control instructions based on the control signal, the control instructions are used to directly control the target high voltage generator and the target flat panel detector; and send the control instructions to the signal conversion PCB.

[0032] The signal conversion PCB is used for receiving control instructions; generating redundant control signals based on the control instructions; and synchronously sending the redundant control signals to the target high voltage generator and the target flat panel detector.

[0033] In an embodiment of the present application, after receiving the control instruction, the signal conversion PCB will generate a dual-path redundant control signal after the control instruction passes through the signal acquisition interface, and send the redundant control signal to ensure the accuracy of the signal received by the high-voltage generator and the flat-panel detector.

[0034] The target high voltage generator and the target flat panel detector are used to synchronously receive the redundant control signal and determine their own working states according to the redundant control signal.

[0035] Optionally, the working state of the target flat panel detector includes at least one of a start working state, a stop working state, and a switching of working states. Corresponding to the state of the target flat panel detector, the target high voltage generator will also adjust its state to meet the working requirements affecting sampling. In the embodiment of the present application, the flat panel detector mainly performs the functions of image acquisition, integration, and image output, and the high voltage generator mainly performs the function of exposure.

[0036] In summary, the system provided in the embodiment of the present application has three independent groups of high-voltage generators and corresponding flat-panel detectors set up in the acquisition device, and corresponding to the high-voltage generators and flat-panel detectors, a signal conversion PCB and a PLC device that can uniformly control the device through hardware are arranged. During the operation of the acquisition device, by using the combination of three groups of equipment, under the control of the PLC device and the redundant signal output of the signal conversion PCB, each group of equipment can be exposed and collected synchronously to meet the different needs of determining the location of the lesion during the treatment process, and improve the accuracy of lesion positioning.

[0037] Figure 3A schematic diagram of a digitally reconstructed radiographic image acquisition device provided by an exemplary embodiment of the present application is shown. The process is described by taking the application of the process to a PLC device in a digitally reconstructed radiographic image acquisition system as an example. The method includes:

[0038] Step 301: receiving control data sent by a computer device.

[0039] This process is the process in which the PLC device as a lower computer device directly obtains control data from the upper computer. In the embodiment of the present application, the computer device is connected to the PLC device via a control protocol network (Controller Area Network, CAN) bus. Optionally, the computer device sends control data in response to the input command received by itself.

[0040] It should be noted that, in one example, the number of target high voltage generators and target flat panel detectors indicated by the control data is at least two, so as to adapt to a more complex image acquisition environment.

[0041] Step 302, matching the identification code data with its own device identification code.

[0042] In an embodiment of the present application, the computer device will store the machine identification registration code corresponding to the PLC device, and send the machine identification registration code to the PLC device as a matching credential when sending control data. When the PLC device receives the control data, during the process of decoding the control data, it obtains the identification code data and matches the identification code data with its own device identification code to determine whether the data should be received by itself.

[0043] Step 303: In response to the matching being successful, a control instruction is generated based on the control signal.

[0044] In the embodiment of the present application, when the identification code data matches its own device identification code, the PLC device executes the subsequent process accordingly, that is, generates a control instruction to be sent to the signal conversion PCB.

[0045] Step 304, receiving interlocking data.

[0046] The interlocking data is used to indicate the operation status of the equipment in the acquisition environment. In an embodiment of the present application, the interlocking data indicates the safety status of the equipment in the medical environment where the high-voltage generator and the flat-panel detector are located. In one example, since the high-voltage generator has the risk of emitting radiation when in operation, a shielding door is provided in the medical environment. For the case where there is a shielding door, the interlocking data includes shielding door data, which is used to indicate the opening and closing status of the shielding door in the acquisition environment.

[0047] Step 305, determining the safety level based on the interlocking data.

[0048] In the embodiment of the present application, the interlocking data can directly correspond to the safety level indicating whether the DR device is working. Optionally, in one example, when the shielding door data indicates that the shielding door is not closed, the safety level is adjusted to the non-working safety level, that is, indicating that the current environment is not ready for the DR device to collect data.

[0049] Step 306, in response to the safety level reaching the working safety level, sending a control instruction to the signal conversion PCB.

[0050] When the security level reaches the working security level, the computer device will execute the subsequent control instruction sending process accordingly.

[0051] In the embodiment of the present application, the PLC device is connected to the signal conversion PCB via a bus. When the safety level reaches the working safety level, the PLC device will send the control instruction to the signal conversion PCB.

[0052] After the signal conversion PCB receives the control instruction, it will generate redundant control signals according to the control instruction, and directly control the target high-voltage generator and the target flat-panel detector through the redundant control signals. When the target high-voltage generator and the target flat-panel detector perform the corresponding work, or determine that they are faulty and cannot perform the work, they will send a work feedback signal to the signal conversion PCB. The signal conversion PCB will generate a bidirectional redundant signal accordingly, and generate a feedback instruction to send to the PLC device.

[0053] In conjunction with the above instructions, please refer to Figure 4 In the signal conversion PCB 410, when the signal acquisition interface 401 is used to interact with the PLC device 420, the signal conversion PCB 410 can directly interact with the high voltage generator 430 and the flat panel detector 440. When data processing is performed inside the signal conversion PCB 410, the first control instruction 451 transmitted by the PLC device will be processed into a dual-path redundant form, and converted into a first control signal 452 in a dual-path redundant form, and then sent to the high voltage generator and the flat panel detector; correspondingly, the second control signal 453 fed back by the high voltage generator 430 and the flat panel detector 440 will be processed into a dual-path redundant form, and converted into a second control instruction 454 in a dual-path redundant form, and then sent to the PLC device 420.

[0054] Step 307: receiving a feedback instruction.

[0055] This process is the process in which the PLC device receives a feedback instruction sent in the form of dual-path redundancy.

[0056] In one example, the feedback signal includes a working feedback signal indicating the working result of the target high voltage generator and / or the target flat panel detector and an abnormal feedback signal indicating that the target high voltage generator and / or the target flat panel detector is in an abnormal state.

[0057] Step 308: Generate feedback data based on the feedback instruction.

[0058] Step 309: Send feedback data to the computer device.

[0059] Steps 308 to 309 are the process of generating and sending feedback data. Optionally, after receiving the feedback data, the computer device will record the working conditions and abnormal conditions in the feedback data and execute subsequent response processing processes.

[0060] In summary, the method provided in the embodiment of the present application sets up three independent groups of high-voltage generators and corresponding flat-panel detectors in the acquisition device, and arranges a signal conversion PCB and a PLC device that can uniformly control the device through hardware corresponding to the high-voltage generator and the flat-panel detector. During the operation of the acquisition device, by using the combination of three groups of equipment, under the control of the PLC device and the redundant signal output of the signal conversion PCB, each group of equipment can be exposed and collected synchronously to meet the different needs of determining the location of the lesion during the treatment process, and improve the accuracy of lesion positioning.

[0061] The above are only optional embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A digitally reconstructed radiographic image acquisition system, characterized in that: The digital reconstruction radiological image acquisition system includes a computer device, a PLC device, a signal conversion PCB, a first high voltage generator, a second high voltage generator, a third high voltage generator, a first flat panel detector, a second flat panel detector and a third flat panel detector; The computer device is communicatively connected to the PLC device, the PLC device is communicatively connected to the signal conversion PCB, and the signal conversion PCB is communicatively connected to the first high voltage generator, the second high voltage generator, the third high voltage generator, the first flat panel detector, the second flat panel detector, and the third flat panel detector respectively; The computer device is used to send control data to the PLC device, the control data is used to instruct a target high voltage generator and a target flat panel detector corresponding to the target high voltage generator to work synchronously, the number of the target high voltage generator and the number of the target flat panel detectors are the same, the target high voltage generator is selected from the first high voltage generator, the second high voltage generator and the third high voltage generator, and the target flat panel detector is selected from the first flat panel detector, the second flat panel detector and the third flat panel detector; The PLC device is used to receive the control data; generate a control instruction based on the control data, wherein the control instruction is used to directly control the target high voltage generator and the target flat panel detector; and send the control instruction to the signal conversion PCB; The signal conversion PCB is used to receive the control instruction; generate a redundant control signal based on the control instruction; and synchronously send the redundant control signal to the target high voltage generator and the target flat panel detector; The target high voltage generator and the target flat panel detector are used to synchronously receive the redundant control signal and determine their own working states according to the redundant control signal; Wherein, the PLC device is further used to receive interlocking data, the interlocking data is used to indicate the operation status of the equipment in the acquisition environment; determine the safety level based on the interlocking data; in response to the safety level reaching the working safety level, send the control instruction to the signal conversion PCB; The interlocking data includes shielding door data, and the shielding door data is used to indicate the opening and closing status of the shielding door in the acquisition environment; In response to the platform door data indicating that the platform door is not closed, the security level is adjusted to a non-operational security level.

2. The digitally reconstructed radiographic image acquisition system according to claim 1, characterized in that: The control data also includes identification code data, which is used to uniquely indicate the target high voltage generator. The PLC device is further configured to match the identification code data with its own device identification code; in response to successful matching, generate the control instruction based on the control data.

3. The digitally reconstructed radiological image acquisition system according to claim 1, characterized in that: The target high voltage generator and the target flat panel detector are also used to send a working feedback signal to the signal conversion PCB; The signal conversion PCB is used to receive the working feedback signal, generate a redundant feedback signal based on the working feedback signal; generate a feedback instruction based on the redundant feedback signal; and send the feedback instruction to the PLC device; The PLC device is used to receive the feedback instruction; generate feedback data based on the feedback instruction; and send the feedback data to the computer device; The computer device is used to receive the feedback data.

4. The digitally reconstructed radiological image acquisition system according to claim 3, characterized in that: The feedback signal includes a working feedback signal and an abnormal feedback signal; The working feedback signal indicates the working result of the target high voltage generator and / or the target flat panel detector; The abnormal feedback signal indicates that the target high voltage generator and / or the target flat panel detector is in an abnormal state.

5. The digitally reconstructed radiological image acquisition system according to claim 4, characterized in that: The computer device is further configured to, in response to receiving feedback data, wherein the feedback data indicates that the feedback signal includes an abnormal feedback signal, record an abnormal situation corresponding to the abnormal feedback signal.

6. The digitally reconstructed radiological image acquisition system according to claim 1, characterized in that: The number of the target high voltage generators and the target flat panel detectors indicated by the control data is at least two.

7. A method for collecting digitally reconstructed radiological images, characterized in that: The method for collecting digitally reconstructed radiological images is applied to a PLC device in a system for collecting digitally reconstructed radiological images as claimed in any one of claims 1 to 6, and the method comprises: receiving control data sent by a computer device, wherein the control data is used to instruct a target high voltage generator and a target flat panel detector corresponding to the target high voltage generator to work synchronously; generating a control instruction based on the control data, wherein the control instruction is used to directly control the target high voltage generator and the target flat panel detector; The control instruction is sent to the signal conversion PCB.

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