A method and device for synchronizing exposure timing of an X-ray digital imaging system

Abstract

The present invention discloses a method and device for synchronizing the exposure timing of an X-ray digital imaging system. The level change of each I / O interface will notify the image acquisition workstation through the first communication interface, the image detector communicates with the image acquisition workstation, and the CPU detects whether the image acquisition workstation is in the exposure interface and has selected the patient shooting position and whether the photography frame and the beam limiter window move to the required position through the communication of the first communication interface and the second communication interface, and finally decides whether to control the high-voltage generator exposure through the I / O interface. The present invention realizes the synchronization of the exposure timing of each component in the entire X-ray digital imaging system.

Description

Technical Field

[0001] The present invention relates to medical device technology, in particular to the field of X-ray digital imaging technology, and in particular to a device for coordinating the working sequence of various components of an X-ray digital imaging system and ultimately controlling an X-ray high voltage generator for synchronous exposure. Background Art

[0002] X-ray digital imaging systems are usually composed of an X-ray tube, an X-ray high voltage generator, an X-ray beam limiter, an X-ray image detector, an image acquisition workstation, and a photography frame that carries the tube, beam limiter, and detector. Existing X-ray digital imaging system synchronous exposure is based on the inherent synchronization signal interface between the X-ray high voltage generator and the image detector. This makes the synchronization of the system limited to the high voltage generator and the image detector, and the timing of other components in the system is ignored, making it impossible for the image workstation to control the working timing of the entire system. The components are not ready for exposure, which not only reduces the image quality, but also increases the radiation dose of the patient, and it is impossible to develop advanced system functions (such as whole body stitching and dual-energy subtraction). Due to the large number of high voltage generators and image detectors on the market, after permutations and combinations, the system synchronization method is complicated. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a method and a device for realizing the exposure timing synchronization of each component in an X-ray digital imaging system, so as to solve the shortcoming that only the high voltage generator and the image detector are synchronized in the current exposure timing of the imaging chain, and realize the exposure timing synchronization of each component in the entire X-ray digital imaging system.

[0004] To solve the above technical problems, the present invention adopts the following technical solution: an exposure timing synchronization device for an X-ray digital imaging system, comprising a CPU, a first communication interface connected to the CPU, a second communication interface, an I / O synchronization interface, and a power supply for the synchronization device, wherein the first communication interface communicates with an image acquisition workstation, the second communication interface communicates with a photographic frame component, the CPU is respectively connected to a high-voltage generator, an image detector, a filter grid, and a human electrocardiogram component through an I / O synchronization interface and detects whether the high-voltage generator, the image detector, the filter grid, and the human electrocardiogram are ready, the level change of each I / O interface will be notified to the image acquisition workstation through the first communication interface, the image detector communicates with the image acquisition workstation, the CPU detects whether the image acquisition workstation is in an exposure interface and a patient shooting position has been selected and whether the photographic frame and the beam limiter window have moved to the required position through the communication between the first communication interface and the second communication interface, and finally decides whether to control the high-voltage generator to expose through the I / O interface.

[0005] Optionally, the first communication interface is an RS232 communication interface.

[0006] Optionally, the second communication interface is a RS485 / CAN2.0A communication interface.

[0007] Optionally, the CPU converts the RS232 communication standard data of the image acquisition workstation into RS485 or CAN2.0A communication standard data of the photography frame, so that the motion parameters of the photography frame and the image acquisition workstation data interact with each other.

[0008] Optionally, the CPU adopts LPC1752 with ARM CORTEX-M3 core, and uses its P1 and P2 port pins as logic level output and edge interrupt input detection ports; uses its TXD0 and RXD0 pins to perform RS232 electrical specification data communication through RS232 communication interface and external components, and uses its TXD1 and RXD1 pins to perform RS485 electrical specification data communication through RS485 / CAN2.0A communication interface and external components; uses its TD1 and RD1 pins to perform CAN2.0A electrical specification data communication through RS485 / CAN2.0A communication interface and external components.

[0009] The present invention also provides a method for synchronizing exposure timing of an X-ray digital imaging system, which uses the synchronization device to achieve exposure timing synchronization, including the following steps:

[0010] S1, after the image acquisition workstation manually enters the exposure acquisition state, it sends a signal to allow the image detector to enter the acquisition state, and at the same time sends a signal to allow the synchronization device to enter the exposure timing synchronization state;

[0011] S2, the image detector and the synchronization device enter the exposure waiting state;

[0012] S3, after the hand switch of the X-ray generating assembly is pressed, a first synchronization voltage signal is output to the synchronization device;

[0013] S4, after receiving the first synchronization voltage signal, the synchronization device combines the received voltage synchronization signal of the filter grid, the human electrocardiogram component and the communication interface signal of the photography frame component, and when these three signals are all logically "ready", sends a second synchronization voltage signal to the image detector;

[0014] S5, the image detector starts to enter the image acquisition state and sends a third synchronization voltage signal to the synchronization device. After receiving the third step voltage signal, the synchronization device sends a fourth voltage synchronization signal to the X-ray generating component, and the X-ray generating component is finally exposed.

[0015] The present invention adopts the above technical solution, and has the following beneficial effects: the user only needs to select the corresponding exposure position on the image acquisition workstation, and then press the hand switch in the high-voltage generating component to automatically complete the control of the exposure timing, with high work efficiency, low image noise, and low false exposure rate. Therefore, the disadvantage of only synchronizing the high-voltage generator and the image detector in the current imaging chain exposure timing is solved (regardless of whether the body position is selected, as long as the exposure hand switch is pressed, exposure occurs, causing false exposure), and the synchronization of the exposure timing of each component in the entire X-ray digital imaging system is realized.

[0016] The specific technical solutions and beneficial effects of the present invention will be described in detail in the following specific embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0018] Figure 1 is a system topology diagram of the present invention;

[0019] Figure 2 It is a schematic diagram of the composition of the synchronization device of the present invention. DETAILED DESCRIPTION

[0020] Embodiment 1

[0021] like Figure 2 As shown, an exposure timing synchronization device for an X-ray digital imaging system includes an RS232 communication interface 10, an RS485 / CAN2.0A communication interface 11, an I / O synchronization interface 12, a CPU 13 and a power supply 14.

[0022] Among them, the RS485 / CAN2.0A communication interface 11 can select RS485 circuit and CAN2.0A circuit for communication. The CPU adopts LPC1752 with ARM CORTEX-M3 core, uses the pins of its P1 and P2 ports as logic level output and edge interrupt input detection ports, and performs optically isolated logic level input and output through the I / O interface 12; uses its TXD0 and RXD0 pins to perform RS232 electrical specification data communication with external components through the RS232 communication interface 10, and uses its TXD1 and RXD1 pins to perform RS485 electrical specification data communication with external components through the RS485 / CAN2.0A communication interface 11; uses its TD1 and RD1 pins to perform CAN2.0A electrical specification data communication with external components through the RS485 / CAN2.0A communication interface 11. The image detector communicates with the image acquisition workstation through the RJ45 communication interface.

[0023] refer to Figure 1As shown, the CPU is connected to the high voltage generator (i.e., the X-ray generating component 3), the image detector 2, the grid 6, and the human ECG component 7 through an I / O synchronization interface 12 respectively, and detects whether the high voltage generator, the image detector, the grid, and the human ECG are ready. The level change of each I / O interface will notify the image acquisition workstation 4 through the RS232 communication interface. The CPU detects whether the image acquisition workstation 4 is in the exposure interface and the patient shooting position has been selected and whether the photography frame and the beam limiter window have moved to the required position through the RS232 communication interface and the RS485 / CAN2.0A communication interface, and finally decides whether to control the high voltage generator to expose through the I / O interface.

[0024] The above-mentioned image acquisition workstation, photography frame assembly, high voltage generator, image detector, filter grid, and human electrocardiogram assembly are all components of the X-ray digital imaging system, and reference may be made to the prior art. The photography frame assembly includes a photography frame and a beam limiter.

[0025] Embodiment 2

[0026] A method for synchronizing exposure timing of an X-ray digital imaging system, using the synchronization device to achieve exposure timing synchronization, comprises the following steps:

[0027] S1, after the image acquisition workstation 4 manually enters the exposure acquisition state, it sends a logic "please prepare" signal to the image detector 2 through the RJ45 communication interface and sends a logic "prepare for exposure" signal to the synchronization device 1 through the RS232 communication interface;

[0028] S2, the image detector 2 is ready and enters the exposure waiting state, and the synchronization device 1 also enters the exposure waiting state;

[0029] S3, after the hand switch of the X-ray generating assembly 3 is pressed, a synchronous voltage signal is output to the synchronization device 1. After receiving the signal, the synchronization device 1 combines the received voltage synchronization signals of the filter grid 6, the human electrocardiogram assembly 7 and the communication interface signal of the photographic frame assembly 5. When these three signals are all logically "ready", a synchronous voltage signal is sent to the image detector 2;

[0030] S4, the image detector 2 starts to enter the image acquisition state, and at the same time sends a synchronization voltage signal to the synchronization device 1. The synchronization device 1 receives the signal and sends a voltage synchronization signal to the X-ray generating component 3, and the X-ray generating component 3 is finally exposed.

[0031] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. An exposure timing synchronization device for an X-ray digital imaging system, characterized in that: It includes a CPU, a first communication interface connected to the CPU, a second communication interface, an I / O synchronization interface, and a power supply for supplying power to the synchronization device. The first communication interface communicates with the image acquisition workstation, the second communication interface communicates with the photography frame assembly, the CPU is connected to the X-ray generation assembly, the image detector, the filter grid, and the human electrocardiogram assembly respectively through an I / O synchronization interface and detects whether the X-ray generation assembly, the image detector, the filter grid, and the human electrocardiogram assembly are ready, the level change of each I / O synchronization interface will notify the image acquisition workstation through the first communication interface, the image detector communicates with the image acquisition workstation, the CPU detects whether the image acquisition workstation is in the exposure interface and the patient shooting position has been selected and whether the photography frame assembly and the beam limiter window have moved to the required position through the communication between the first communication interface and the second communication interface, and finally decides whether to control the exposure of the X-ray generation assembly through the I / O synchronization interface; The exposure timing synchronization method comprises the following steps: S1, after the image acquisition workstation manually enters the exposure acquisition state, it sends a signal allowing the image detector to enter the acquisition state, and at the same time sends a signal allowing the synchronization device to enter the exposure timing synchronization state; S2, the image detector and the synchronization device enter the exposure waiting state; S3, after the hand switch of the X-ray generating assembly is pressed, a first synchronization voltage signal is output to the synchronization device; S4, after receiving the first synchronization voltage signal, the synchronization device combines the received voltage synchronization signal of the grid, the voltage synchronization signal of the human ECG component and the communication interface signal of the photographic frame component. When the voltage synchronization signal of the grid, the voltage synchronization signal of the human ECG component and the communication interface signal of the photographic frame component are all logically "ready", the synchronization device sends a second synchronization voltage signal to the image detector; S5, the image detector starts to enter the image acquisition state and sends a third synchronization voltage signal to the synchronization device. After receiving the third synchronization voltage signal, the synchronization device sends a fourth voltage synchronization signal to the X-ray generating component, and the X-ray generating component is finally exposed.

2. The exposure timing synchronization device for an X-ray digital imaging system according to claim 1, characterized in that: The first communication interface is an RS232 communication interface.

3. The exposure timing synchronization device for an X-ray digital imaging system according to claim 2, characterized in that: The second communication interface is a RS485 / CAN2.0A communication interface.

4. The exposure timing synchronization device for an X-ray digital imaging system according to claim 3, characterized in that: The CPU adopts LPC1752 with ARM CORTEX-M3 core, uses the pins of its P1 and P2 ports as logic level output and edge interrupt input detection ports; uses its TXD0 and RXD0 pins to perform RS232 electrical specification data communication through an RS232 communication interface and external components, uses its TXD1 and RXD1 pins to perform RS485 electrical specification data communication through an RS485 / CAN2.0A communication interface and external components; and uses its TD1 and RD1 pins to perform CAN2.0A electrical specification data communication through an RS485 / CAN2.0A communication interface and external components.

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