CN209966403U

CN209966403U - Exposure time sequence synchronizer of X-ray digital imaging system

Info

Publication number: CN209966403U
Application number: CN201920493628.8U
Authority: CN
Inventors: 黄松正
Original assignee: ZHEJIANG KANGYUAN MEDICAL DEVICE CO Ltd
Current assignee: ZHEJIANG KANGYUAN MEDICAL DEVICE CO Ltd
Priority date: 2019-04-12
Filing date: 2019-04-12
Publication date: 2020-01-21
Anticipated expiration: 2029-04-12

Abstract

The utility model discloses an exposure time sequence synchronizer of an X-ray digital imaging system, which comprises a CPU, a first communication interface, a second communication interface, an I/O synchronous interface and a power supply for supplying power to the synchronizer, the first communication interface is communicated with the image acquisition workstation, the second communication interface is communicated with the camera frame assembly, the CPU is respectively connected with the high voltage generator, the image detector, the grid and the human body electrocardio assembly through an I/O synchronous interface and detects the levels, the level change of each I/O interface informs the image acquisition workstation through the first communication interface, the CPU detects whether the image acquisition workstation is positioned at an exposure interface and selects a patient shooting position and whether the camera frame and the beam limiter window move to a required position through the communication of the first communication interface and the second communication interface, and the CPU controls the exposure of the high voltage generator through the I/O interface. The utility model discloses a communication and the control signal transmission of each relevant part among the X ray digital imaging system.

Description

Exposure time sequence synchronizer of X-ray digital imaging system

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to X ray digital imaging technique especially indicates a coordinate each subassembly work chronogenesis of X ray digital imaging system, and the device that final control X ray high voltage generator carries out the synchronous exposure.

Background

An X-ray digital imaging system generally consists of an X-ray bulb, an X-ray high voltage generator, an X-ray beam limiter, an X-ray image detector, an image acquisition workstation, and a camera stand carrying the bulb, the beam limiter and the detector. The synchronous exposure of the existing X-ray digital imaging system is realized based on an inherent synchronous signal interface between an X-ray high-voltage generator and an image detector. This makes the synchronization of the system only limited between the high voltage generator and the image detector, and the timing sequence of other components in the system is neglected, so that the image workstation can not control the working timing sequence of the whole system, and each component is not ready to be exposed, which not only reduces the imaging quality, but also increases the radiation dose of the patient, and can not develop the advanced functions of the system (such as whole body splicing and dual-energy subtraction). The high-voltage generators and image detectors with various models exist in the current market, and the system synchronization method is complicated through arrangement and combination.

In order to solve the defect that only a high-voltage generator and an image detector are synchronized in the exposure time sequence of the current image chain, the synchronization of the exposure time sequence of each component in the whole X-ray digital imaging system is realized, the information of each part of the X-ray digital imaging system needs to be acquired, and the signal transmission and control are realized.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that an X ray digital imaging system exposure chronogenesis synchronizer is provided, the communication and the control signal transmission of each relevant part among the realization X ray digital imaging system.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the exposure time sequence synchronizer of the X-ray digital imaging system comprises a CPU, a first communication interface, a second communication interface, an I/O synchronous interface and a power supply for supplying power to the synchronizer, the first communication interface is communicated with the image acquisition workstation, the second communication interface is communicated with the camera frame assembly, the CPU is respectively connected with the high voltage generator, the image detector, the grid and the human body electrocardio assembly through an I/O synchronous interface, the level change of each I/O interface informs the image acquisition workstation through the first communication interface, the CPU detects whether the image acquisition workstation is positioned at an exposure interface and a selected patient shooting position and whether the camera frame and the beam limiter window move to a required position through the communication of the first communication interface and the second communication interface, and the CPU controls the exposure of the high voltage generator through the I/O interface.

Optionally, the first communication interface is an RS232 communication interface.

Optionally, the second communication interface is an RS485/can2.0a communication interface.

Optionally, the CPU converts the RS232 communication standard data of the image capturing workstation into data of RS485 or can2.0a communication standard with the camera rig, so that the motion parameters of the camera rig and the data of the image capturing workstation interact.

Optionally, the CPU adopts an LPC1752 of an ARM cutex-M3 core, and pins of P1 and P2 ports of the CPU are used as a detection port for logic level output and edge interrupt input; the TXD0 and RXD0 pins of the antenna are used for carrying out data communication of RS232 electrical specification through an RS232 communication interface and an external component, and the TXD1 and RXD1 pins of the antenna are used for carrying out data communication of RS485 electrical specification through an RS485/CAN2.0A communication interface and an external component; data communication of the CAN2.0A electrical specification is performed with external components through an RS485/CAN2.0A communication interface by using TD1 and RD1 pins thereof.

The utility model adopts the above technical scheme, realize the communication and the control signal transmission of each relevant part among the X ray digital imaging system. Has the following beneficial effects: for a user, the control of an exposure time sequence can be fully automatically completed only by selecting a corresponding exposure body position at an image acquisition workstation and then pressing a hand brake in the high-voltage generation assembly, so that the working efficiency is high, the image noise is low, and the false exposure rate is low. Therefore, the defect that only the high-voltage generator and the image detector are synchronized in the exposure time sequence of the current image chain is overcome (whether the body position is selected or not, the exposure is carried out as long as the exposure hand brake is pressed, so that the exposure error is caused), and the synchronization of the exposure time sequence of each component in the whole X-ray digital imaging system is realized.

The specific technical solution and the advantages of the present invention will be described in detail in the following detailed description with reference to the accompanying drawings.

Drawings

The invention will be further described with reference to the accompanying drawings and specific embodiments:

FIG. 1 is a system topology diagram of the present invention;

fig. 2 is a schematic diagram of the synchronization device according to the present invention.

Detailed Description

Example one

As shown in FIG. 2, the exposure timing synchronization device of the X-ray digital imaging system comprises an RS232 communication interface 10, an RS485/CAN2.0A communication interface 11, an I/O synchronization interface 12, a CPU13 and a power supply 14.

The RS485/can2.0a communication interface 11 may select the RS485 circuit and can communicate with the can2.0a circuit. The CPU adopts LPC1752 of ARM CORTEX-M3 core, uses pins of P1 and P2 ports thereof as logic level output and edge interrupt input detection ports, and carries out optical isolation logic level input and output through the I/O interface 12; the TXD0 and RXD0 pins of the antenna are used for carrying out data communication of RS232 electrical specification through the RS232 communication interface 10 and external components, and the TXD1 and RXD1 pins of the antenna are used for carrying out data communication of RS485 electrical specification through the RS485/CAN2.0A communication interface 11 and external components; data communication of the can2.0a electrical specification is performed with an external component through the RS485/can2.0a communication interface 11 using its TD1, RD1 pins. The image detector and the image acquisition workstation communicate through an RJ45 communication interface.

Referring to fig. 1, the CPU is connected to the high voltage generator (i.e. X-ray generating assembly 3), the image detector 2, the grid 6, and the body ecg assembly 7 through an I/O synchronous interface 12, respectively, and detects whether the high voltage generator, the image detector, the grid, and the body ecg are ready, the level change of each I/O interface will be notified to the image acquisition workstation 4 through an RS232 communication interface, and the CPU detects whether the image acquisition workstation 4 is in an exposure interface and the selected patient position and whether the camera frame and the beam limiter window move to the required position through the communication of the RS232 communication interface and the RS485/can2.0a communication interface, and finally determines whether to control the exposure of the high voltage generator through the I/O interface.

The image acquisition workstation, the camera stand assembly, the high voltage generator, the image detector, the grid and the human body electrocardio assembly are all parts on an X-ray digital imaging system, and the prior art can be referred to. The camera stand assembly includes a camera stand and a beam limiter.

Example two

A method for synchronizing exposure time sequence of an X-ray digital imaging system adopts a synchronization device to realize the synchronization of the exposure time sequence, and comprises the following steps:

s1, after the image acquisition workstation 4 enters the exposure acquisition state manually, the image acquisition workstation sends out a logic ready signal to the image detector 2 through the RJ45 communication interface and sends out a logic ready exposure signal to the synchronizer 1 through the RS232 communication interface;

s2, the image detector 2 enters into the exposure waiting state after being prepared, and the synchronizer 1 also enters into the exposure waiting state;

s3, after the hand brake of the X-ray generation assembly 3 is pressed down, a synchronous voltage signal is output to the synchronizer 1, the synchronizer 1 receives the signal and then combines the received voltage synchronous signal of the grid 6, the human body electrocardio assembly 7 and the communication interface signal of the camera bracket assembly 5, and when the three signals are all logic 'ready', a synchronous voltage signal is sent to the image detector 2;

s4, the image detector 2 starts to enter the image acquisition state and simultaneously sends out a synchronous voltage signal to the synchronizer 1, the synchronizer 1 receives the signal and sends out a voltage synchronous signal to the X-ray generating assembly 3, and the X-ray generating assembly 3 is finally exposed.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and 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 which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.

Claims

An exposure time sequence synchronizer of an X-ray digital imaging system is characterized in that: the system comprises a CPU, a first communication interface, a second communication interface, an I/O synchronous interface and a power supply, wherein the first communication interface is connected with the CPU, the second communication interface is connected with a camera frame assembly, the CPU is respectively connected with a high-voltage generator, an image detector, a grid and a human body electrocardio assembly through one I/O synchronous interface, the level change of each I/O interface informs the image acquisition workstation through the first communication interface, the CPU detects whether the image acquisition workstation is in an exposure interface and a selected patient shooting body position and whether the camera frame and a beam limiter window move to a required position through the communication of the first communication interface and the second communication interface, and the CPU controls the exposure of the high-voltage generator through the I/O interface.
2. The exposure timing synchronization apparatus of an X-ray digital imaging system according to claim 1, wherein: the first communication interface is an RS232 communication interface.
3. The exposure timing synchronization apparatus of an X-ray digital imaging system according to claim 2, wherein: the second communication interface is an RS485/CAN2.0A communication interface.
4. The exposure timing synchronization apparatus of an X-ray digital imaging system according to claim 3, wherein: the CPU converts the RS232 communication standard data of the image acquisition workstation into data of RS485 or CAN2.0A communication standard of the photographing frame, so that the motion parameters of the photographing frame and the data of the image acquisition workstation are interacted.
5. The exposure timing synchronization apparatus of an X-ray digital imaging system according to claim 3, wherein: the CPU adopts LPC1752 of ARM CORTEX-M3 core, and uses pins of P1 and P2 ports thereof as a logic level output and edge interrupt input detection port; the TXD0 and RXD0 pins of the antenna are used for carrying out data communication of RS232 electrical specification through an RS232 communication interface and an external component, and the TXD1 and RXD1 pins of the antenna are used for carrying out data communication of RS485 electrical specification through an RS485/CAN2.0A communication interface and an external component; data communication of the CAN2.0A electrical specification is performed with external components through an RS485/CAN2.0A communication interface by using TD1 and RD1 pins thereof.