title: A comparison study of regularization techniques on the theoretical design of phased array RF coils in MRI.
abstract: In MRI engineering, regularization techniques can be effectively used to solve ill-posed problems in electromagnetics, such as the inverse design of phased array RF coils. In this work, a comparison on various regularization methods which are employed to numerically reconstruct a divergence-free cylindrical surface of current distribution is investigated. It is found that a coil current pattern is very sensitive to the modes of the basis function describing the current densities on the coil surface; and iterative regularization techniques generally produce better B(1) field profiles compared with direct approaches.
authors.affiliation: School of Information Technology and Electrical Engineering, University of Queensland, QLD 4072, Australia. yuli@itee.uq.edu.au
authors.forename: Yu
authors.initials: Y
authors.lastname: Li
authors.forename: Hua
authors.initials: H
authors.lastname: Wang
authors.forename: Feng
authors.initials: F
authors.lastname: Liu
authors.forename: Bing Keong
authors.initials: BK
authors.lastname: Li
authors.forename: Guofa
authors.initials: G
authors.lastname: Shou
authors.forename: Ewald
authors.initials: E
authors.lastname: Weber
authors.forename: Stuart
authors.initials: S
authors.lastname: Crozier
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008280:Magnetics / Q000295:instrumentation*; D008962:Models, Theoretical; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014159:Transducers