Chinese Journal of Magnetic Resonance ›› 2007, Vol. 24 ›› Issue (4): 433-438.

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A Self-riggering Gradient Waveform Generator for MRI Scanner

LIU Yan, NING Rui-peng, LI Geng-ying*   

  1. Shanghai Key Laboratory of Functional Magnetic Resonance Imaging, Department of Physics, East China Normal University, Shanghai 200062, China
  • Received:2007-08-28 Online:2007-12-05 Published:2007-12-05
  • About author:*Corresponding author: Li Geng-ying, Tel:021-62233286,E-mail:gyli@phy.ecnu.edu.cn.
  • Supported by:

    上海市科委项目(06DZ22014, 06DZ22922)资助.

Abstract:

A design of a gradient waveform generator with self-triggering function for magnetic resonance imaging (MRI) is proposed. In the present design, a high precision DAC (24-bit) chip having a relatively large group delay is used. With this design and the proposed self-triggering technique, the group delay of gradient waveforms can be eliminated. As a result, high precision DAC can be applied to MRI scanner.

Key words: MRI, group delay, gradient waveform generator

CLC Number: