一种高场强磁共振兼容心电采集与处理系统的设计与实现  

A Kind of High-field MRI Compatible ECG Acquisition and Processing System Design

作　　者：杨威[1,2] 喻罡[1] 王德峰[2] 

机构地区：[1]中南大学地球科学与信息物理学院,长沙410083 [2]香港中文大学深圳研究院,深圳418054

出　　处：《生命科学仪器》2015年第2期30-34,47,共6页Life Science Instruments

基　　金：General Research Fund(GRF)-Fast 3D Cardiac Magnetic Resonance Imaging Based on Compressed Sensing and Parallel Imaging;CUHK 414712;01/01/2013-31/12/2015;HK;700;000

摘　　要：为应对高场强磁共振成像时产生的电磁干扰,提出了一种磁共振兼容的心电采集和处理系统的设计方案。基于集成电路模拟前端和微控制器的采集方案极大地减小了系统回路面积,从而有效地减小了梯度磁场的干扰。为避免使用金属导线,采用碳纤维设计心电导联线并且设计了一种串口信号的光传输方案,心电数据通过光纤传送到控制室的PC进行实时处理。心电信号经小波滤波后输出的参考信号能够稳定地检测出R波。1.5T磁共振成像环境下的测试表明,该系统可用于心率监护和心电门控成像。In response to electromagnetic interference generated in the process of magnetic resonance imaging, we propose a kind of MRI-compatible ECG acquisition and processing system design, which based on analog front-end IC and MCU greatly reduces the system loop area, thus effectively reducing gradient noise. To avoid the use of metal wires, ECG leads was made of carbon fiber and a kind of serial port signal optic transmission scheme was proposed, ECG data transmit through optical fiber to the control room PC for real-time processing, Reference signal output from the wavelet filters can stably detect the R-waves. The test results in 1.5T MR/environment showed that the system can be used for ECG heart rate monitoring and ECG-Gating imaging.

关 键 词：磁共振兼容 心电 碳纤维导联线 光纤 小波分析 心电门控 

分 类 号：TH77[机械工程—仪器科学与技术]