基于异构双核的磁共振接收机的设计

doi:10.11938/cjmr20170112

波谱学杂志 ›› 2017, Vol. 34 ›› Issue (1): 100-107.doi: 10.11938/cjmr20170112

• 低场磁共振技术与应用专栏 • 上一篇下一篇

基于异构双核的磁共振接收机的设计

刘颖, 张育文, 梁浈, 章浩伟

上海理工大学医疗器械与食品学院, 医学影像工程研究所, 上海 200093

收稿日期:2016-09-13 修回日期:2017-01-09 出版日期:2017-03-05 发布日期:2017-03-05
通讯作者: 刘颖,Tel:18602168660,E-mail:ling2431@163.com E-mail:ling2431@163.com
基金资助:
国家自然科学基金资助项目（61101174）；微创创新基金资助项目（YS30808115）

A Heterogeneous Dual-Core Receiver System for Magnetic Resonance Applications

LIU Ying, ZHANG Yu-wen, LIANG Zhen, ZHANG Hao-wei

School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China

Received:2016-09-13 Revised:2017-01-09 Online:2017-03-05 Published:2017-03-05

摘要/Abstract

摘要： 提出了基于异构双核的低场核磁共振（Low-field Nuclear Magnetic Resonance，low-field NMR）接收机的设计，具有ARM（Adanced RISC Machines）和现场可编程门阵列（Field Programmable Gate Array，FPGA）先进的异构双核结构、高速的模数转换器（Analog to Digital Converter，ADC）采集、增益的可控以及可视化显示等特性，提高了整个系统的性能指标.设计中采用Xilinx公司的系统开发工具System Generator来实现内部信号处理功能.实验结果表明，数字接收机具有结构紧凑、可重构性强、采样速率高和成本低等特点，并且增益的可控使接收机获得了较大的动态范围，提高了重建图像的信噪比（Signal-to-Noise Ratio，SNR）.

关键词: 可变增益, 动态范围, 异构双核, 低场核磁共振(low-field NMR)

Abstract: A heterogeneous dual-core receiver system that combines advanced reduced instruction set computing (RISC) machines (ARM) and field programmable gate array (FPGA) is proposed for low-field nuclear magnetic resonance (NMR) applications. This system has advantages, such as high speed analog to digital converter (ADC) acquisition and variable gain control. In this design, the system generator, a system development tool from the Xilinx Company, can implement internal signal processing functions. Experimental results showed that, compared with the traditional receiver, the digital receiver had compact structure, strong reconstruction, high sampling rate and low cost. In addition, variable gain control enabled the digital receiver to achieve a large dynamic range such that the signal-to-noise ratio (SNR) of the reconstructed image could be improved.

Key words: dynamic range, low-field NMR, heterogeneous dual-core, variable gain

中图分类号:

O482.53

刘颖, 张育文, 梁浈, 章浩伟. 基于异构双核的磁共振接收机的设计[J]. 波谱学杂志, 2017, 34(1): 100-107.

LIU Ying, ZHANG Yu-wen, LIANG Zhen, ZHANG Hao-wei. A Heterogeneous Dual-Core Receiver System for Magnetic Resonance Applications[J]. Chinese Journal of Magnetic Resonance, 2017, 34(1): 100-107.

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基于异构双核的磁共振接收机的设计

A Heterogeneous Dual-Core Receiver System for Magnetic Resonance Applications

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