Integrated Multi-Channel Subsystem for MR Signal Acquisition

摘要：

A multi-channel digital subsystem for MR signal acquisition was designed to achieve parallel acquisition. The subsystem is based on FPGA. DSP and Power PC. Sample the multi-channel magnetic resonance signals at a high speed simultaneously and demodulate them directly. A digital down conversion (DDC) chip (AD6636) demodulate and decimate multi-channel signal under the DSP control. Power PC reads out the I/Q data of each channel at the same time with the signal sampling frequency up to 100 MSPS. The subsystem can be applied to magnetic field of 1T. Experiments show that four channels work well, and filter parameters can be changed easily by user. It is optimized for compact with high sampling rate and rich flexible filter design. It provides a high-performance signal acquisition design for parallel imaging.

关键词： Magnetic Resonance Imaging (MRI) Multi-Channel Digital Down Conversion (DDC) FPGA

作者: Yang Wenhui Yan Zheng

作者单位: Electromagnetic Imaging Research Group Institute of Electrical Engineering, CAS Beijing, China Graduate School Chinese Academy of Science Beijing, China

会议类型: 国际会议

会议名称: 2011 4th International Congress on Image and Signal Processing(第四届图像与信号处理国际学术会议 CISP 2011)

会议地点: 上海

会议语种:英文

页码: 2214-2216

在线出版日期: 2011-10-15（万方平台首次上网日期，不代表论文的发表时间）