波谱学杂志 ›› 2005, Vol. 22 ›› Issue (2): 217-221.

• 研究简报 • 上一篇    下一篇

低场脉冲NMR中静磁场不均匀性的射频场补偿

  

  1. 中国科学院电工研究所,   北京  100080
  • 收稿日期:2004-05-27 出版日期:2005-06-05 发布日期:2005-06-05
  • 基金资助:

    国家自然科学基金资助项目(No.50377043).

RF Compensation for Static Field Inhomogeneity in Low Field Pulsed NMR

  1. Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing  100080, China
  • Received:2004-05-27 Online:2005-06-05 Published:2005-06-05
  • Supported by:

    国家自然科学基金资助项目(No.50377043).

摘要:

在低场脉冲核磁共振实验中为了增大射频激励的带宽,通常采用的方法是提高射频激励磁场的场强. 针对共振区域中静磁场的不均匀性,本文提出了根据共振区域中的静磁场分布设计射频线圈以提高射频激励带宽,并用目标场方法实现了这一构想. 

关键词: 静磁场不均匀性, 射频补偿, 目标场方法, 最小电感

Abstract:

Increasing the magnitude of RF excitation field is a commonly used method to increase excitation bandwidth in low field pulsed NMR experiments. This paper presents a RF compensation method for increasing the RF excitation bandwidth according to the distribution of static magnetic field. The validity of the method is demonstrated with the target field method.

Key words: NMR, field inhomogeneity, RF compensation, target field method, minimum inductance

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