Designing shielded radio-frequency phased-array coils for magnetic resonance imaging |
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| Authors: | Xu Wen-Long a Zhang Ju-Cheng a Li Xia ab Xu Bing-Qiao a and Tao Gui-Sheng |
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| Affiliation: | a)b) a) Department of Biomedical Engineering, China Jiliang University, Hangzhou 310018, China b) Department of Biomedical Engineering, Zhejiang University, Hangzhou 310027, China |
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| 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. |
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| Keywords: | active shield phased-array coil radio-frequency coil magnetic resonance imaging |
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