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A time-harmonic target-field method for designing shielded RF coils in MRI

Citation

While, PT and Forbes, LK and Crozier, S, A time-harmonic target-field method for designing shielded RF coils in MRI, Measurement Science and Technology, 16, (6) pp. 1381-1393. ISSN 0957-0233 (2005) [Refereed Article]

DOI: doi:10.1088/0957-0233/16/6/021

Abstract

An inverse method for designing shielded, high-frequency RF coil systems is presented. A time-harmonic target-field approach is taken to find current densities on primary and shield RF coils. The correspondingly induced magnetic field is required to be homogeneous upon an asymmetrically located target region within the scanner and to be zero over an exterior target region. The finite length of the coil system is represented via a Fourier series expansion for the current density. Some new regularization penalty functions are considered in the solution process. A technique is given for creating coil winding patterns from complex, time-dependent current densities. To demonstrate the power of this design method, several coil windings are displayed for the primary and shield coils along with the corresponding fields. © 2005 IOP Publishing Ltd.

Item Details

Item Type:Refereed Article
Research Division:Physical Sciences
Research Group:Condensed Matter Physics
Research Field:Electronic and Magnetic Properties of Condensed Matter; Superconductivity
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Mathematical Sciences
Author:While, PT (Dr Peter While)
Author:Forbes, LK (Professor Larry Forbes)
ID Code:36459
Year Published:2005
Funding Support:Australian Research Council (DP0343350)
Web of Science® Times Cited:7
Deposited By:Mathematics
Deposited On:2005-08-01
Last Modified:2006-03-28
Downloads:0

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