基于異構(gòu)雙核的磁共振接收機(jī)的設(shè)計(jì)
發(fā)布時間：2018-12-15 07:12
【摘要】：提出了基于異構(gòu)雙核的低場核磁共振(Low-field Nuclear Magnetic Resonance,low-field NMR)接收機(jī)的設(shè)計(jì),具有ARM(Adanced RISC Machines)和現(xiàn)場可編程門陣列(Field Programmable Gate Array,FPGA)先進(jìn)的異構(gòu)雙核結(jié)構(gòu)、高速的模數(shù)轉(zhuǎn)換器(Analog to Digital Converter,ADC)采集、增益的可控以及可視化顯示等特性,提高了整個系統(tǒng)的性能指標(biāo).設(shè)計(jì)中采用Xilinx公司的系統(tǒng)開發(fā)工具System Generator來實(shí)現(xiàn)內(nèi)部信號處理功能.實(shí)驗(yàn)結(jié)果表明,數(shù)字接收機(jī)具有結(jié)構(gòu)緊湊、可重構(gòu)性強(qiáng)、采樣速率高和成本低等特點(diǎn),并且增益的可控使接收機(jī)獲得了較大的動態(tài)范圍,提高了重建圖像的信噪比(Signal-to-Noise Ratio,SNR).
[Abstract]:The design of low field nuclear magnetic resonance (Low-field Nuclear Magnetic Resonance,low-field NMR) receiver based on heterogeneous binuclear is presented. The receiver has advanced heterogeneous dual-core structure with ARM (Adanced RISC Machines) and (Field Programmable Gate Array,FPGA (Field Programmable Gate Array). High speed A / D converter (Analog to Digital Converter,ADC) acquisition, gain control and visual display can improve the performance of the whole system. In the design, the system development tool System Generator of Xilinx Company is used to realize the internal signal processing function. The experimental results show that the digital receiver has the advantages of compact structure, strong reconfiguration, high sampling rate and low cost. The signal-to-noise ratio (Signal-to-Noise Ratio,SNR) of reconstructed image is improved.
【作者單位】： 上海理工大學(xué)醫(yī)療器械與食品學(xué)院醫(yī)學(xué)影像工程研究所;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(61101174) 微創(chuàng)創(chuàng)新基金資助項(xiàng)目(YS30808115)
【分類號】：O482.531
[Abstract]:The design of low field nuclear magnetic resonance (Low-field Nuclear Magnetic Resonance,low-field NMR) receiver based on heterogeneous binuclear is presented. The receiver has advanced heterogeneous dual-core structure with ARM (Adanced RISC Machines) and (Field Programmable Gate Array,FPGA (Field Programmable Gate Array). High speed A / D converter (Analog to Digital Converter,ADC) acquisition, gain control and visual display can improve the performance of the whole system. In the design, the system development tool System Generator of Xilinx Company is used to realize the internal signal processing function. The experimental results show that the digital receiver has the advantages of compact structure, strong reconfiguration, high sampling rate and low cost. The signal-to-noise ratio (Signal-to-Noise Ratio,SNR) of reconstructed image is improved.
【作者單位】： 上海理工大學(xué)醫(yī)療器械與食品學(xué)院醫(yī)學(xué)影像工程研究所;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(61101174) 微創(chuàng)創(chuàng)新基金資助項(xiàng)目(YS30808115)
【分類號】：O482.531
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