WO2019090830A1

WO2019090830A1 - Wireless transmission ct system, and wireless transmission method for ct system

Info

Publication number: WO2019090830A1
Application number: PCT/CN2017/112335
Authority: WO
Inventors: 牛明; 刘彤; 顾树国; 华越轩; 谢庆国
Original assignee: 苏州瑞派宁科技有限公司
Priority date: 2017-11-10
Filing date: 2017-11-22
Publication date: 2019-05-16
Also published as: CN107669290A

Abstract

A wireless transmission CT system, comprising an industrial control computer module (20), a sliding ring and mechanical control module (30) and a main server module (40), wherein the industrial control computer module (20) comprises an industrial control computer (21) and a wireless sending module (22), the industrial control computer (21) is in communication connection with an X-ray detector (13), and the wireless sending module (22) is in communication connection with the industrial control computer (21); and the sliding ring (31) is electrically connected to an X-ray generator (11), a collimator (12), the X-ray detector (13) and the industrial control computer module (20), a main server (41) is in communication connection with the sliding ring (31), and the main server (41) is also in communication connection with the industrial control computer module (20) by means of a wireless receiving module (42) matching the wireless sending module (22). The wireless transmission method comprises: connecting an X-ray detector (13) to an industrial control computer (21), and testing whether the connection is normal (S1); connecting a wireless sending module (22) of the industrial control computer (21) to a wireless receiving module (42) of a main server (41), and testing whether the connection is normal (S2); testing the connection between the main server (41) and a sliding ring (31) (S3); starting to scan a detected body (S4); and carrying out image reconstruction and display (S5). The wireless transmission CT system can complete data transmission of a CT system at high quality, and reduce the cost.

Description

Wireless transmission CT system and wireless transmission method of CT system

Technical field

The present invention relates to the field of medical devices, and more particularly to a wireless transmission CT system and a wireless transmission method of a CT system.

Background technique

CT (Computerized Tomography) is a projection of a certain physical quantity (such as wave speed, X-ray intensity, electron beam intensity, etc.) acquired according to the periphery of the detected object without destroying the structure of the detected object. Data, using a certain mathematical method, through computer processing, reconstructing a two-dimensional image on a specific level of the detected object and a technique of constructing a three-dimensional image based on a series of the above two-dimensional images. The CT device mainly includes the following three parts: a scanning part, which includes an X-ray source, a detector and a gantry, and the X-ray source emits an X-ray beam to scan a layer of a certain thickness of a specific part of the object to be detected, and the detector receives and transmits The X-ray of the layer is converted into visible light, and further, the photoelectric converter converts visible light into an electrical signal, and the electrical signal is converted into a digital signal by an analog/digital converter; 2 a computer system that collects the collected portion Signal information data is calculated and stored; 3 image display and storage system displays images processed and reconstructed by a computer system on a television screen or images taken by multiple cameras or laser cameras (Jing Chi, Caiming Zhang.Optimization) Of Medical CT Data with High Precision [J]. Computer-Aided Design and Applications, 2013).

In addition, due to the large amount of information data involved in the CT processing, the data transmission system is also an important part of CT. For the existing medical CT or micro-CT, the data transmission mainly adopts the following methods:

First, most of the existing CT designs still use the slip ring technology to transmit power signals and data signals. The transmission of power signals only needs to consider voltage and power, while the transmission of data signals requires higher bandwidth for optical fibers. With the gradual maturity of CT technology and the popularization of multi-row CT and other technologies, the amount of CT data has increased sharply, which has increased the requirements for the bandwidth of the slip ring. For example, for a certain number of animal CT and industrial micro-CT, the slip ring diameter Larger, due to the increase in the amount of data, The bandwidth requirements for data transmission are gradually increasing. For large-diameter fiber-optic slip rings of more than 150 mm, more than 10 channels are required, and the fiber-optic path with a total bandwidth of more than 1 KMB has relatively high technical manufacturing cost and maintenance cost. In addition, in the slip ring technology, the neatness of the optical path is very high, and fine particles, dust, and the like may have a great influence on signal transmission. (Li Zhengxiang, Ge Jianxin, Discussion on Data Transmission Mode in the Development of CT Technology [J], China Medical Equipment, 2011).

Second, some CT products use a closed-loop small slip ring, which uses a small slip ring to set the instrument in the form of no through hole, thereby reducing the difficulty of data transmission of the slip ring under large diameter and high bandwidth, and avoiding The high-tech cost caused by the large-diameter slip ring, but due to the popularity of composite instruments such as PET/CT for animals, the closed-hole CT design will impose certain restrictions on PET dynamic scanning and gas-analysis.

Third, for some micro-CTs, instead of using a rotating disc, the motor is used to drive the sample to rotate, and the rotation of the sample is used to replace the rotation of the CT disc in the conventional CT, and the fixed disc is used to reduce the rotation. A slip ring is required for high-bandwidth data transmission, but there is still a certain degree of winding in the method, which interferes with signal transmission, reduces the signal-to-noise ratio, and reduces the life of data transmission and power transmission lines (Yanye, Lu Kun, Qiushi, Ren, An integrated quad-modality molecular imaging system for small animals [J], Journal of nuclear medicine: official publication, Society of Nuclear Medicine, 2014).

In summary, it can be seen that there are two trends in today's animal CT and industrial micro-CT design, one is to continue to use large-diameter, high-bandwidth slip ring for power signal and data signal transmission, but because Large-caliber fiber-optic slip rings are costly and difficult to maintain, which greatly increases product development costs. The other is to abandon the use of large-diameter, high-bandwidth fiber-optic slip rings with small-diameter slip rings or The method of rotating the sample, which can reduce the cost of the CT machine in the slip ring part, but the design of the non-through hole will lead to certain animal experiments and industrial detection limitations, and the method of rotating the sample will transmit data in the aspect of winding and the like. Bring interference and reduce data signal to noise ratio. Therefore, it is necessary to develop a CT data transmission system that combines data transmission quality and low cost.

Summary of the invention

An object of the present invention is to provide a wireless transmission CT system and a wireless transmission method of a CT system, thereby solving the problem that the CT system cannot balance data transmission quality and cost in the prior art.

In order to solve the above technical problem, the technical solution of the present invention is to provide a wireless transmission CT system, the CT system includes a scanning module, and the scanning module includes an X-ray generator and a collimator. And an X-ray detector matched with the X-ray generator, the CT system further comprising: an industrial computer module, the industrial computer module comprising an industrial computer and a wireless transmission module, wherein the industrial computer is in communication with the X-ray detector The wireless transmitting module is communicably connected to the industrial computer; the slip ring and the mechanical control module, the slip ring and the mechanical control module comprise a slip ring and a mechanical control device, and the slip ring and the mechanical control device respectively An X-ray generator, the collimator, the X-ray detector, and the industrial computer module are electrically connected; and a main server module, the main server module including a main server and a wireless receiving module, the main server and The slip ring is communicatively connected, and the main server is communicably connected to the industrial computer module through the wireless receiving module that is matched with the wireless sending module.

According to an embodiment of the invention, the industrial computer is communicably connected to the X-ray detector by a Camera Link method.

According to an embodiment of the invention, the wireless transmitting module is integrated with the industrial computer.

According to an embodiment of the invention, the wireless transmitting module performs wireless transmission using WiFi, WIDI, WHDI, WIGig or ZigBee technology.

According to an embodiment of the invention, the industrial computer is a computer, a single chip microcomputer, an ARM or an FPGA.

The invention also provides a wireless transmission method of a CT system, the wireless transmission method comprising:

Step S1: connecting the X-ray detector to the industrial computer, testing whether the industrial computer can obtain the data signal sent by the X-ray detector, and if so, proceeding to the next step;

Step S2: connecting the wireless transmitting module of the industrial computer to the wireless receiving module of the primary server, and testing whether the connection is normal, detecting whether the primary server can obtain the data signal sent by the industrial computer, and if so, proceeding to the next step. ;

Step S3: testing the connection between the primary server and the slip ring, and testing whether the slip ring can normally send a power signal, and if so, proceeding to the next step;

Step S4: starting scanning the subject, the main server controls the disc motion of the CT system by using the slip ring and collects a data signal through the X-ray detector;

Step S5: The scanning is completed, and the main server performs image reconstruction and display on the data signal.

According to an embodiment of the invention, in the step S1, the X-ray detector and the industrial computer are connected by a Camera Link method.

According to an embodiment of the present invention, in the step S2, the wireless transmitting module of the industrial computer is connected to the wireless receiving module of the primary server in the same local area network.

The wireless transmission CT system provided by the invention directly connects the X-ray detector to the industrial computer, and then wirelessly transmits the digital signal to the main server through the industrial computer for image reconstruction, and rejects the traditional technology using a large-diameter high-bandwidth optical fiber slip ring. In the case of data transmission, only the slip ring is used for power signal transmission. Compared with the traditional animal CT and the industrial micro-CT, the slip ring part requires more than ten channels to transmit detector data larger than 1KMB bandwidth, which greatly reduces the cost and Technical difficulty, and reduce the complexity of maintenance, the use of wireless technology in signal transmission, to ensure the integrity and effectiveness of data in the case of large data volumes. At the same time, the wireless transmission method of the CT system provided by the invention passes the industrial computer as an intermediate step of data signal transmission, so that the slip ring only needs to transmit the power signal to the main server, compared with the sliding of the traditional animal CT and the industrial micro CT. The ring part requires more than ten channels to transmit detector data larger than 1KMB bandwidth, which greatly reduces the cost and technical difficulty, and reduces the maintenance complexity. The use of wireless technology in the data signal transmission part ensures the integrity and validity of the data in the case of large data volumes.

DRAWINGS

1 is a schematic view showing the arrangement of a CT machine according to the prior art;

2 is a schematic diagram showing the arrangement of a wireless transmission CT system according to an embodiment of the present invention;

3 is a block diagram showing the structure of a wireless transmission CT system according to an embodiment of the present invention;

4 is a schematic diagram of connection and data transfer of an industrial computer of a wireless transmission CT system according to an embodiment of the present invention;

FIG. 5 is a schematic diagram showing the steps of a wireless transmission method of a CT system according to an embodiment of the present invention.

Detailed ways

The invention will be further described below in conjunction with specific embodiments. It is to be understood that the following examples are merely illustrative of the invention and are not intended to limit the scope of the invention.

1 is a schematic view showing the arrangement of a CT machine according to the prior art. As can be seen from FIG. 1, a conventional CT machine generally includes two parts, a stationary part and a rotating part. The stationary part is provided with a control system and an image reconstruction system, and the rotating part is provided with X-ray generation. The device, the collimator, the corresponding detector and the data acquisition module, the X-rays emitted by the X-ray generator are received by the detector after passing through the imaging space, and the data acquisition module amplifies and converts the analog signal detected by the detector into a digital signal. The main server performs operations such as image reconstruction on digital signals. In the traditional medical CT or industrial micro-CT, the data transmission module usually uses a high-bandwidth fiber slip ring for data transmission, and the power signal and the data signal are transmitted to the main server and processed by means of radio frequency coupling and infrared coupling.

The present invention discards the conventional manner of using the optical fiber slip ring for data signal transmission. As shown in FIG. 2 and FIG. 3, the CT system provided by the present invention includes a scanning module 10, an industrial computer module 20, a slip ring and a mechanical control module 30, and a main The server module 40, wherein the scanning module 10 includes an X-ray generator 11, a collimator 12, an X-ray detector 13, and other arrangements, and the X-ray generator 11, the collimator 12, and the X-ray detector 13 are all mounted on the CT. The structure and arrangement of the rotating part of the system are basically the same as those in the prior art, and will not be described here. The industrial computer module 20 includes the industrial computer 21 and the wireless transmitting module 22. The industrial computer 21 is installed in the rotating part of the CT system, specifically The industrial computer 21 can be installed in the CT ring of the rotating part of the CT system, and the industrial computer 21 is connected to the X-ray detector 13 to receive X through the Camera Link (Camera link standard is customized, modified, issued by the American Society of Automation Industry AIA). The detector signal detected by the ray detector 13 is connected to the industrial computer 21 by the wireless transmitting module 22. Preferably, the wireless transmitting module 22 is integrated with the industrial computer 21; the slip ring and the mechanical mechanism The system module 30 includes a slip ring 31 and a mechanical control device. The diameter of the hole of the slip ring 31 can be determined by those skilled in the art according to the requirements of the CT system architecture, and is not limited herein. The mechanical control device includes a transmission device and a motor, and the motor can be based on the CT system. A component such as a stepping motor or a servo motor is required. The transmission device can be determined by a person skilled in the art according to the requirements of the CT system architecture, and is not limited herein. The main server module 40 includes a main server 41 and a wireless receiving module 42, and the wireless receiving module 42 and the wireless device. The sending module 22 is matched to receive the detector signal, and the main server 41 is communicably connected with the wireless receiving module 42 to connect with the slip ring and the mechanical control module 30 to receive the power signal according to the received detector signal. The main server 41 Image reconstruction, storage, display, output, and CT scan parameter settings and monitoring based on detector signals and power signals.

More specifically, since the industrial computer module 20 is installed in the CT ring, it is necessary to add a corresponding weight design to the CT ring to ensure the stability of the rotation, which is a technical means easily realized by those skilled in the art. No longer.

The industrial computer 21 in the present invention is preferably an industrial computer with superior performance. Similar to a common computer, the industrial computer 21 needs to be equipped with a high-performance arithmetic processor, such as an intel I7-7700k or the like, and also needs to be equipped. High-speed solid-state drives, such as the SAMSUNG 850PRO SATA3 or high-speed SSDs of the same type, to ensure the speed and stability of data storage. The industrial computer 21 can also be a computer, a single chip microcomputer, an ARM (Acorn RISC Machine) or an FPGA (Field-Programmable Gate Array). The wireless transmitting module 22 can also be connected to the X-ray detector 13 through a common interface such as a Gige (Gigabit Ethernet) interface and a USB interface. The wireless transmitting module 22 can directly adopt the wireless network routing module of the industrial computer 21, using the wifi technology and the primary server. The wireless receiving module 42 on 41 matches the connection to complete high-speed and high-quality data transmission; the wireless transmitting module 22 can also adopt WIDI (Intel Wireless Display), WHDI (Wireless Home Digital Interface), WIGig (Wireless Gigabit) or ZigBee (a short-range wireless communication technology) technology for wireless transmission.

Further, the slip ring 31 of the present invention should be equipped with 3-6 power signal paths satisfying the requirements of 220-240V, 5-10A, 50-60Hz parameters, and the slip ring can also adopt a large-diameter fiber slip ring, and the slip ring only The power supply partial data is transmitted to the main server 41.

The main server 41 and the wireless receiving module 42 in the present invention may be integrated into one, and the wireless receiving module 42 may use the wifi module to receive the probe data transmitted by the industrial computer 21.

More specifically, as shown in FIG. 4, the connection and data transmission manner of the wireless transmission device of the CT system provided by the present invention is as follows. In the imaging process of the CT system, the X-ray generator (FIG. 2) disposed on the rotating portion is emitted. X-rays, X-rays pass through the imaging space or the subject placed in the imaging space, and the corresponding X-ray detector 13 disposed in the rotating portion also detects X-rays and forms a detection signal, and the X-ray detector 13 passes through the Camera Link interface. The industrial computer 21 is connected, and the industrial computer 21 includes a wireless transmitting module 22, a processor 23, a solid state hard disk storage 24, a graphics card 25, and other devices 26. The processor 23 receives the detection signal from the X-ray detector 13 and performs the detection signal. A series of processing such as amplification, integration, analog-to-digital conversion, etc. to convert the detection signal into a digital signal, the solid-state hard disk storage 24 is used to store the digital signal processed by the processor 23, and the graphics card 25 is used to undertake the task of outputting the display graphic, and the digital signal is passed. Matched wireless transmitting module 22 and wireless connection The receiving module is sent to the main server 41. On the other hand, the slip ring 31 is connected to the main server 41 through a plurality of power signal paths satisfying the parameter requirements, and the power data of the components of the rotating portion is transmitted to the main server 41 through the power signal path, and the main server 41 is based on the received digital signal. And power signal for image reconstruction, storage, display, output, and CT scan parameter settings and monitoring.

The wireless transmission CT system provided by the invention directly connects the X-ray detector to the industrial computer, and then wirelessly transmits the digital signal to the main server through the industrial computer for image reconstruction, and rejects the traditional technology using a large-diameter high-bandwidth optical fiber slip ring. In the case of data transmission, only the slip ring is used for power signal transmission. Compared with the traditional animal CT and the industrial micro-CT, the slip ring part requires more than ten channels to transmit detector data larger than 1KMB bandwidth, which greatly reduces the cost and Technical difficulty, and reduce the complexity of maintenance, the use of wireless technology in signal transmission, to ensure the integrity and effectiveness of data in the case of large data volumes. At the same time, the invention mainly uses industrial computer technology in the data transmission and reconstruction stage, which is faster than the traditional slip ring mechanical technology, and will be more conducive to improving the data transmission speed and quality. According to Moore's Law, the computer develops at a high speed. Will give CT hardware more space and be able to reduce costs more effectively.

The wireless transmission method of the CT system provided by the present invention comprises the following steps:

Step S1: connecting the X-ray detector to the industrial computer to test whether the industrial computer can obtain the data signal sent by the X-ray detector, and if so, proceed to the next step;

Step S2: connecting the wireless transmitting module of the industrial computer to the wireless receiving module of the primary server, and testing whether the connection is normal, detecting whether the primary server can obtain the data signal sent by the industrial computer, and if so, proceeding to the next step;

Step S4: starting to scan the subject, the main server controls the disc motion of the CT system by using the slip ring and collects the data signal through the X-ray detector;

More specifically, in the above step S1, the industrial computer can be connected to the display or remote control for operation, the X-ray detector and the industrial computer are connected by the Camera-Link method, and the industrial computer uses the matching image capturing software for testing, if normal When the data signal of the X-ray detector is collected, the X-ray detector is normally connected to the industrial computer.

In the above step S2, the main server and the industrial computer are connected in the same local area network by using the wireless transmitting module of the industrial computer, and the main server uses the data transmission software to test the transmission speed of the data signal. And the packet loss rate ensures the high-speed and efficient transmission of the CT scan data signal from the industrial computer to the main server.

In the above step S3, the main server is connected to the main server by using a slip ring, and the main server tests whether a power signal is transmitted from the slip ring, and the power signal is transmitted normally, and then step S4 and step S5 are performed.

It is to be noted that the components used in the wireless transmission method of the CT system provided by the present invention are the same as those of the wireless transmission CT system provided by the present invention, and are not described herein again.

The wireless transmission method of the CT system provided by the invention passes the industrial computer as an intermediate step of data signal transmission, so that the slip ring only needs to transmit the power signal to the main server, compared with the slip ring part of the traditional animal CT and industrial micro CT. More than ten channels are required to transmit detector data larger than 1KMB bandwidth, which greatly reduces the cost and technical difficulty, and reduces the maintenance complexity. The use of wireless technology in the data signal transmission part ensures the integrity and validity of the data in the case of large data volumes.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and various modifications may be made to the above-described embodiments of the present invention. That is, the simple and equivalent changes and modifications made in the claims and the contents of the specification of the present invention fall within the scope of the claims of the present invention. What has not been described in detail in the present invention are all conventional technical contents.

Claims

A wireless transmission CT system, the wireless transmission CT system comprising a scanning module, the scanning module comprising an X-ray generator, a collimator, and an X-ray detector matched with the X-ray generator, wherein the wireless The transmission CT system also includes:

The industrial computer module includes an industrial computer and a wireless transmission module, and the industrial computer is communicably connected to the X-ray detector, and the wireless transmission module is communicably connected with the industrial computer;

a slip ring and a mechanical control module, the slip ring and the mechanical control module comprising a slip ring and a mechanical control device, the slip ring and the mechanical control device respectively with the X-ray generator, the collimator, the An X-ray detector and the industrial computer module are electrically connected;

a main server module, the main server module includes a main server and a wireless receiving module, wherein the main server is communicably connected to the slip ring, and the main server simultaneously passes the wireless receiving module and the matching with the wireless sending module The industrial computer module communication connection is described.
The wireless transmission CT system according to claim 1, wherein the industrial computer is communicably connected to the X-ray detector by a Camera Link method.
The wireless transmission CT system according to claim 1, wherein the wireless transmission module is integrated with the industrial computer.
The wireless transmission CT system according to claim 1, wherein the wireless transmission module performs wireless transmission using WiFi, wireless high-definition technology, wireless home digital interface, wireless gigabit or ZigBee technology.
The wireless transmission CT system according to claim 1, wherein the industrial computer is a computer, a single chip microcomputer, an ARM processor or an FPGA.
A wireless transmission method for a CT system, characterized in that the wireless transmission method comprises:

Step S1: connecting the X-ray detector to the industrial computer, testing whether the industrial computer can obtain the data signal sent by the X-ray detector, and if so, proceeding to the next step;

Step S2: connecting the wireless transmitting module of the industrial computer with the wireless receiving module of the primary server And detecting whether the connection is normal, detecting whether the primary server can obtain the data signal sent by the industrial computer, and if so, proceeding to the next step;

Step S3: testing the connection between the primary server and the slip ring, and testing whether the slip ring can normally send a power signal, and if so, proceeding to the next step;

Step S4: starting scanning the subject, the main server controls the disc motion of the CT system by using the slip ring and collects a data signal through the X-ray detector;

Step S5: The scanning is completed, and the main server performs image reconstruction and display on the data signal.
The wireless transmission method of the CT system according to claim 6, wherein in the step S1, the X-ray detector and the industrial computer are connected by a Camera Link method.
The wireless transmission method of the CT system according to claim 6, wherein in the step S2, the wireless transmitting module of the industrial computer is connected to the wireless receiving module of the primary server in the same local area network.
The wireless transmission method of the CT system according to claim 6, wherein the wireless transmission module performs wireless transmission using WiFi, wireless high-definition technology, wireless home digital interface, wireless gigabit or ZigBee technology.
The wireless transmission method of the CT system according to claim 6, wherein the industrial computer is a computer, a single chip microcomputer, an ARM processor or an FPGA.