波谱学杂志 ›› 2016, Vol. 33 ›› Issue (4): 581-589.doi: 10.11938/cjmr20160407

• 研究论文 • 上一篇    下一篇

基于数据采集卡和GPU的MRI信号接收设计

郭新宇, 肖亮   

  1. 北京化工大学 信息科学与技术学院, 北京 100029
  • 收稿日期:2016-01-25 修回日期:2016-10-24 出版日期:2016-12-05 发布日期:2016-12-05
  • 通讯作者: 肖亮,电话:010-64434931,E-mail:xiaoliang@mail.buct.edu.cn E-mail:xiaoliang@mail.buct.edu.cn
  • 作者简介:郭新宇(1991-),男,北京人,硕士研究生,计算机科学与技术专业
  • 基金资助:
    国家自然科学基金资助项目(81227003).

Design of A Receiver for Magnetic Resonance Imaging Based on Data Acquisition Card and GPU

GUO Xin-yu, XIAO Liang   

  1. College of Information Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2016-01-25 Revised:2016-10-24 Online:2016-12-05 Published:2016-12-05

摘要: 针对磁共振成像(Magnetic Resonance Imaging,MRI)的信号接收,提出一种基于高速数据采集卡和图形处理器(Graphic Processing Unit,GPU)的接收方法.采样每一行数据时,在谱仪输出触发脉冲的控制下,数据采集卡对前置放大器输出的信号进行直接采样.然后,使用GPU并行实现数字混频、多级滤波抽取和图像重建. GPU具有很高的运算速度,信号处理过程中可以根据需要灵活地实现滤波器的组合.同时,数据全部采用双精度浮点类型,保证了很高的运算精度,提高了重建图像的信噪比. MRI实验证明了该信号接收方法的可行性.

关键词: 信号接收, 数据采集卡, 图形处理器(GPU), 磁共振成像(MRI)

Abstract: A receiver for magnetic resonance imaging (MRI) was developed based on data acquisition card and graphic processing unit (GPU). The data acquisition card is controlled by a triggering signal generated from the spectrometer, and samples the output from the pre-amplifier directly. Digital mixing, multi-stage filter decimation and image reconstruction are performed by GPU subsequently. GPU is specialized for high speed computation. When processing signals it can achieve a combination of filters flexibly based on the needs. In addition, double precision floating point format is used in the whole process to ensure a high computation precision. The feasibility of the receiver was demonstrated experimentally.

Key words: signal receiving, graphic processing unit(GPU), magnetic resonance imaging(MRI), data acquisition card

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