Chinese Journal of Magnetic Resonance ›› 2015, Vol. 32 ›› Issue (4): 596-605.doi: 10.11938/cjmr20150405

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Retrospective Motion Correction in GABA-Editing Magnetic Resonance Spectroscopy Using the Residual Water Signals

ZHANG Zhu-wei1CHEN Lu-guang2PEI Meng-chao3LI Jian-qi1*   

  1. 1. Shanghai Key Laboratory of Magnetic Resonance, Department of Physics, East China Normal University, Shanghai 200062, China
    2. Department of Radiology, Changhai Hospital of Shanghai, The Second Military Medical University, Shanghai 200433, China.
    3. Shanghai Colorful Magnetic Resonance Co. Ltd., Shanghai 201614, China

  • Received:2014-12-02 Revised:2015-10-23 Online:2015-12-05 Published:2015-12-05
  • About author:*Corresponding author: LI Jian-qi, Tel: +86-21-62223871, E-mail: jqli@phy.ecnu.edu.cn.
  • Supported by:

    国家自然科学基金资助项目(81271533)

Abstract:

Motions occurring during in vivo magnetic resonance spectroscopy acquisition limit the quality of the spectra and their diagnostic value. Subtraction-based spectral editing techniques, such as J-difference editing, are especially prone to motion artifacts, causing false peaks or incomplete elimination of the background. In this study, a retrospective motion correction post-processing method was introduced to analyze GABA-edited spectra acquired by a MEGA point-resolved spectroscopy (MEGA-PRESS) sequence. Head motion during each acquisition was detected and recorded by the residual water signal; the motion-corrupted data were identified and excluded prior to averaging. The gain in spectral quality by using the proposed method was analyzed using the LCModel program. The results showed that the proposed method is an effective way to discard acquisitions corrupted by motion, and to improve spectral quality.

Key words: magnetic resonance spectroscopy, motion correction, GABA

CLC Number: