A comparison study of regularization techniques on the theoretical design of phased array RF coils in MRI.
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.
Li
Yu
Y
School of Information Technology and Electrical Engineering, University of Queensland, QLD 4072, Australia. yuli@itee.uq.edu.au
Wang
Hua
H
Liu
Feng
F
Li
Bing Keong
BK
Shou
Guofa
G
Weber
Ewald
E
Crozier
Stuart
S
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