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

In this paper, an approach to the design of shielded radio-frequency （RF） phased-array coils 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 curren...

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Bibliographic Details
Published inChinese physics B Vol. 22; no. 1; pp. 46 - 53
Main Author 徐文龙 张鞠成 李霞 徐冰俏 陶贵生
Format Journal Article
LanguageEnglish
Published 2013
Subjects
Coils
Coils (windings)
Current density
Homogeneity
Magnetic fields
Magnetic resonance imaging
Mathematical analysis
Shields
Winding
射频
屏蔽
无线电频率
电流密度分布
相控阵列
磁共振成像
线圈设计
设计方法
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ISSN1674-1056
2058-3834
1741-4199
DOI10.1088/1674-1056/22/1/010203

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Summary:In this paper, an approach to the design of shielded radio-frequency （RF） phased-array coils 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 the magnetic field of the coll＇s winding pattern, the selection of a penalty factor is discussed in detail.
Bibliography:active shield, phased-array coil, radio-frequency coil, magnetic resonance imaging
11-5639/O4
In this paper, an approach to the design of shielded radio-frequency （RF） phased-array coils 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 the magnetic field of the coll＇s winding pattern, the selection of a penalty factor is discussed in detail.
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ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/22/1/010203