用软件无线电方法实现MRI回波信号接收

波谱学杂志

• 磁共振谱仪研制技术进展专栏 • 上一篇下一篇

用软件无线电方法实现MRI回波信号接收

胡曾千^1*, 金涛¹, 章新明²

1. 深圳清华大学研究院，广东深圳 518057； 
2. Analog Device Inc.深圳代表处，广东深圳 518031

收稿日期:2012-04-20 修回日期:2012-09-18 出版日期:2013-03-05 发布日期:2013-03-05
通讯作者: 胡曾千,huzq@leaguerdtv.com E-mail:huzq@leaguerdtv.com
作者简介:胡曾千(1957-)，男，江苏人，博士，高级工程师，主要从事电子系统研究、设计和应用工作. 电话：075586023889，E-mail: huzq@leaguerdtv.com.

Receiving MRI Echo with Software-Defined Radio Approach

HU Zeng-qian^1*, JIN Tao¹, ZHANG Xin-ming²

1. Research Institute of Tsinghua University in Shenzhen, Shenzhen 518057, China;
2. Shenzhen Office of Analog Device Inc., Shenzhen 518031, China

Received:2012-04-20 Revised:2012-09-18 Online:2013-03-05 Published:2013-03-05
Contact: HU Zeng-qian，huzq@leaguerdtv.com E-mail:huzq@leaguerdtv.com
About author:胡曾千(1957-)，男，江苏人，博士，高级工程师，主要从事电子系统研究、设计和应用工作. 电话：075586023889，E-mail: huzq@leaguerdtv.com.

摘要/Abstract

摘要：

该文首先简要介绍了软件无线电的基本原理和基于软件无线电的射频接收系统的3种结构形式：射频全宽开低通采样结构，射频直接带通采样结构和宽带中频带通采样结构；并介绍了磁共振成像（MRI）回波信号接收的基本原理和将软件无线电方法应用于MRI回波信号接收的意义. 然后该文重点介绍了采用3种软件无线电结构实现MRI回波信号接收系统的具体设计方案，包括接收系统方框图、工作原理、设计参数的选择和分析、部分功能模块的实现方法、设计和实现中需要注意的问题. 最后以一个低场通用MRI回波接收系统为实例，分析比较了3种设计方案并给出了实际系统的测试结果.

关键词: 磁共振成像(MRI), 回波信号接收, 软件无线电, 中频采样, 射频采样, 带通采样

Abstract:

This paper briefly introduces software-defined radio, as well as three types of radio frequency (RF) receiving system based on the method of softwaredefined radio: RF sampling with low-pass filtering for fully bandwidth; RF directly sampling with band-pass filtering for narrow band signal and IF sampling with band-pass filtering for broad band signal. Then basic principles of receiving MRI echo with the method of software-defined radio are explained. The actual design of RF receiving system for MRI echo with the software-defined radio was presented, including receiving system diagram, working principle, selection and analysis of design parameters, implementation of some function module, and issues that should be considered during design and implementation. Analysis and comparison of three types of RF receiving system based on software-defined radio for low field MRI spectrometer were given.

Key words: MRI, echo, software-defined radio, IF sampling, RF sampling, band-pass sampling

中图分类号:

R445.2

胡曾千*, 金涛, 章新明. 用软件无线电方法实现MRI回波信号接收[J]. 波谱学杂志.

HU Zeng-qian*, JIN Tao, ZHANG Xin-ming. Receiving MRI Echo with Software-Defined Radio Approach[J]. Chinese Journal of Magnetic Resonance.

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用软件无线电方法实现MRI回波信号接收

Receiving MRI Echo with Software-Defined Radio Approach

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