Ten billion Ethernet transmission system used for positron emission computer tomography
A technology of positron emission and tomography, applied in computerized tomography scanners, transmission systems, electrical components, etc., can solve the problems of low transmission rate, increased development time of PET equipment, development cost and application maintenance cost, and low data transmission rate and other problems, to achieve the effect of large-capacity data transmission, reduce driver and application development, and simple transmission structure
Inactive Publication Date: 2014-01-01
SHANGHAI JIAO TONG UNIV
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[0007] 3. The doctoral dissertation "FPGA based data acquisition and digital pulse processing for PET and SPECT" published by Stockholm University in Sweden in 2007 discloses a PET data acquisition and transmission system based on FPGA. In this system, FPGA is used and Soft IP is used , to achieve high-performance data acquisition of FPGA, and the collected data is transmitted to the computer through the USB or PCI hardware interface. This method has high requirements for the IP core customized by FPGA, and the corresponding development cost also increases
[0008] 4. The paper "Waveform-sampling Electronics / DAQ for TOF PET Scanner" discloses a PET data acquisition and transmission system, which uses DRS4 technology to connect the analog output to the ADC to achieve high-speed data conversion, and then FPGA The collected data is transmitted to the computer through the Gigabit Ethernet interface. This solution is characterized by the use of four Gigabit Ethernet interfaces to transmit data, but the data transmission rate is only 1Gbps, and the data transmission rate is low.
But the defect and the deficiency of this prior art are: 1, adopt PCI interface to transmit data, the data transmission rate meets the PET equipment requirement, needs to write complicated driver program and application program at the computer end, has increased the time of PET equipment research and development, development cost and application maintenance costs; 2. The use of Gigabit Ethernet interface avoids writing complex drivers and applications, but its transmission rate is low, which affects PET data reception
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[0022] Such as figure 1 As shown, the 10 Gigabit Ethernet transmission system used in positron emission tomography in this embodiment includes: gamma photons 1 and 2, LYSO crystal 3, photomultiplier tube 4, analog operation unit 5, analog-to-digital conversion unit 6, logic Control unit 7, GTP interface 8, second to fourth detection modules 9, 10, 11 and main controller 12, optical fiber 11, computer 14, communication data (Rx) line 15, communication data (Tx) line 16 and clock ( Clk) line 17, wherein: the gamma photons 1 and 2 flying along the straight line hit the LYSO crystal 3 respectively, the energy of the gamma photons is absorbed by the LYSO crystal 3, and the photons are introduced into the photomultiplier tube 4, and the photons 1 and 2 act on The photoelectric current is generated on the photomultiplier tube 4. After the photomultiplier tube 4 multiplies the photoelectric current, it is transmitted to the analog operation unit 5. The function of the analog operation...
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The invention relates to the technical field of positron emission computer tomography and discloses a ten billion Ethernet transmission system used for positron emission computer tomography. The ten billion Ethernet transmission system comprises four detection modules. The four detection modules are arranged in a two-to-two opposite mode, and are connected through GTP interfaces to form a loop circuit. A GTP interface between adjacent detection modules is in a uni-direction data transmission mode. A main controller can be in double-direction communication with a computer through a ten billion Ethernet transmission interface to realize PET data transmission and configuration data transmission. According to the ten billion Ethernet transmission system, a ten million Ethernet is used for setting up a backplate system of PET equipment, and the requirement of the backplate system of the PED equipment for high-speed large-volume data transmission can be met through the utilization of the ten billion Ethernet technology. Meanwhile, dedicated drive programs and dedicated application programs do not need writing for the computer, ten billion Ethernet data can be received as long as the universal Ethernet interface technology is utilized, the difficulty of developing hardware and software of the backplate system of the PET equipment is effectively reduced, and the progress of PET equipment development is quickened.
Description
technical field [0001] The present invention relates to a system in the technical field of positron emission computed tomography, specifically a high-speed, large-capacity backplane that applies 10G Ethernet transmission technology to the data acquisition system of positron emission computed tomography equipment System data transfer scheme. Background technique [0002] Positron Emission Tomography (PET) is the most advanced clinical imaging technology in the field of nuclear medicine. PET technology is currently the only technology that uses anatomical morphology to perform functional, metabolic and receptor imaging. The characteristics of trauma are currently one of the best means to diagnose and guide the treatment of tumors clinically. The technique relies on the detection of concurrent events (simultaneous events) of a pair of photons, and photons that do not arrive at the detector at the same time are discarded as background events. This technology needs to detect hi...
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IPC IPC(8): H04L29/10A61B6/03
Inventor 刘华颜国正
Owner SHANGHAI JIAO TONG UNIV