中国物理B ›› 2013, Vol. 22 ›› Issue (1): 10203-010203.doi: 10.1088/1674-1056/22/1/010203

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Designing shielded radio-frequency phased-array coils for magnetic resonance imaging

徐文龙a, 张鞠成a, 李霞a b, 徐冰俏a, 陶贵生a b   

  1. a Department of Biomedical Engineering, China Jiliang University, Hangzhou 310018, China;
    b Department of Biomedical Engineering, Zhejiang University, Hangzhou 310027, China
  • 收稿日期:2012-05-26 修回日期:2012-10-24 出版日期:2013-01-01 发布日期:2012-12-01
  • 基金资助:
    Project supported by the National Nature Science Foundation of China (Grant No. 30900332), Grant of General Administration of Quality Supervision Inspection and Quarantine of China (Grant No. 201210079), the Program for Science and Technology Department of Zhejiang Province, China (Grant Nos. 2010C14010 and 2010C33172), and the Natural Science Foundation of Zhejiang Province, China (Grant No. Y2090966).

Designing shielded radio-frequency phased-array coils for magnetic resonance imaging

Xu Wen-Long (徐文龙)a, Zhang Ju-Cheng (张鞠成)a, Li Xia (李霞)a b, Xu Bing-Qiao (徐冰俏)a, Tao Gui-Sheng(陶贵生)ab   

  1. a Department of Biomedical Engineering, China Jiliang University, Hangzhou 310018, China;
    b Department of Biomedical Engineering, Zhejiang University, Hangzhou 310027, China
  • Received:2012-05-26 Revised:2012-10-24 Online:2013-01-01 Published:2012-12-01
  • Contact: Xu Wen-Long E-mail:wenlongxu@sina.com
  • Supported by:
    Project supported by the National Nature Science Foundation of China (Grant No. 30900332), Grant of General Administration of Quality Supervision Inspection and Quarantine of China (Grant No. 201210079), the Program for Science and Technology Department of Zhejiang Province, China (Grant Nos. 2010C14010 and 2010C33172), and the Natural Science Foundation of Zhejiang Province, China (Grant No. Y2090966).

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摘要： In this paper, an approach to the design of shielded radio-frequency (RF) phased-array coil for magnetic resonance imaging (MRI) is proposed. The target field method is used to find current densities distributed on primary and shield coils. The stream function technique is used to discretize current densities and to obtain the winding patterns of the coils. The corresponding highly ill-conditioned integral equation is solved by the Tikhonov regularization with a penalty function related to the minimum curvature. To balance the simplicity and smoothness with the homogeneity of magnetic field of the coil's winding pattern, the selection of penalty factor is discussed in detail.

关键词: active shield, phased-array coil, radio-frequency coil, magnetic resonance imaging

Abstract: In this paper, an approach to the design of shielded radio-frequency (RF) phased-array coil for magnetic resonance imaging (MRI) is proposed. The target field method is used to find current densities distributed on primary and shield coils. The stream function technique is used to discretize current densities and to obtain the winding patterns of the coils. The corresponding highly ill-conditioned integral equation is solved by the Tikhonov regularization with a penalty function related to the minimum curvature. To balance the simplicity and smoothness with the homogeneity of magnetic field of the coil's winding pattern, the selection of penalty factor is discussed in detail.

Key words: active shield, phased-array coil, radio-frequency coil, magnetic resonance imaging

中图分类号:  (Inverse problems)

  • 02.30.Zz
41.20.-q (Applied classical electromagnetism) 41.20.Gz (Magnetostatics; magnetic shielding, magnetic induction, boundary-value problems) 84.32.Hh (Inductors and coils; wiring)