10 Gigabit Ethernet Transmission System for Positron Emission Computed Tomography

Abstract

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, in particular to a high-speed and large-capacity backplane of a data acquisition system that applies 10G Ethernet transmission technology to positron emission computed tomography equipment System data transmission 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 function, metabolism and receptor imaging. It is non-invasive The characteristics are one of the best methods for diagnosis and treatment of tumors in clinical practice. This technology relies on the detection of a pair of concurrent events (simultaneous events) of photons, and photons that do not arrive at the detector at the same time will be discarded as background events. This technology needs ...

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Problems solved by technology

[0005] 1. The paper "Development of PET using 4x4 Array of Large Size Geiger-mode Avalanche Photodiode" published at the 2009 IEEE Nuclear Science Symposium Conference discloses a data transmission scheme for PET equipment. The data transmission scheme adopts PCI interface, and the data of the front-end data acquisition system is directly transmitted to the computer by the cPCI interface of Nutaq data , the disadvantage of this transmission scheme is that the front-end data acquisition and data transmission are concentrated on one circuit board, which requires careful design of the analog circuit board signals entering the circuit board. At the same time, the front-end data acquisition system is limited by its data conversion channel. Multi-channel data acquisition requires the design of multi-channel address decoders, which increases the difficulty of circuit system design and implementation

[0006] 2. The paper "High-speed Data Acquisition and Digital Signal Processing System for PET Imaging Techniques Applied to Mammography" published in IEEE Transactions on Nuclear Science, Volume 5, Issue 3, discloses a data acquisition and transmission system for PET equipment for breast cancer detection. In this system, high-performance DSP is used to realize the converted data transmission , there are two EMIFs on the DSP, which can ensure the high-speed DMA (DirectMemoryAccess) between the DSP and the computer, and ensure the high-speed transmission of the collected data. This scheme increases the complexity of the system and increases the data acquisition and data The cost of the transmission system

[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 and SoftIP are used to realize high-performance data acquisition of FPGA. The data is transmitted to the computer through the USB or PCI hardware interface. This method has high requirements for the IP core customized by the FPGA, and the corresponding development cost also increases.

[0008] 4. The paper "Waveform-sampling Electronics / DAQforTOFPETScanner" 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 the FPGA passes Gigabit Ethernet The interface transmits the collected data to the computer. 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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