波谱学杂志2012，Vol.29Issue(2)：239-247,9.
基于单片FPGA的多通道磁共振成像接收模块
An FPGA-Based Multi-Channel Receiver Module for Magnetic Resonance Imaging
摘要
Abstract
A field programmable gate array (FPGA)-based multi-channel receiver module was developed for magnetic resonance imaging (MRI), with its performance evaluated by MRI experiments. Based on a single FPGA, this apparatus operates direct sampling, digital down conversion and data flow control for multi-channel MR signals. The system-level digital signal processing (DSP) development tools offered by Xilinx company-System Generator was used for FPGA function modeling, simulation and automatic code generation of HDL. The sampling rate of this module is 80 MSPS and the receiver bandwidth can be varied between 1 kHz and 1 MHz, thus the module is suitable for an MRI system with a magnetic field lower than 1 T. Inside the FPGA, digital quadrature demodulation, decimation filtering and data stream processing of one to four channels of sampled signals are performed, and the module is expandable to 8 channels. This module has features of small size, highly integrated and reconfigurable and low cost, providing a high-performance digital solution for multi-channel reception system of an MRI spectrometer.关键词
磁共振成像(MRI)/数字化接收模块/数字下变频/现场可编程门阵列(FPGA)Key words
MRI/ digital receiver/ digital down conversion/ field programmable gate array分类
数理科学引用本文复制引用
王洪,孙宏宇,汤伟男,林先钗,王为民..基于单片FPGA的多通道磁共振成像接收模块[J].波谱学杂志,2012,29(2):239-247,9.基金项目
国家科技重大专项资助项目(2011ZX05008-004). （2011ZX05008-004）
