title: An efficient BiCGstab solved impedance method for induced field evaluation with a hyperthermia applicator.
abstract: This paper presents a stabilized Bi-conjugate gradient algorithm that can significantly improve the performance of the impedance method, which has been widely applied to model low-frequency field induction phenomena in voxel phantoms. The improved quasi-static impedance method offers remarkable computational advantages in terms of convergence performance and memory consumption over the conventional, stationary iterative method-based algorithm. The scheme has been validated against other numerical/analytical solutions on a lossy, multilayered sphere phantom with an ideal coil loop excitation. To further demonstrate the computational performance and application capability of the developed algorithm, the induced fields inside a whole body human phantom responding to hyperthermia device was evaluated. The simulation results show the numerical accuracy and superior performance of the method.
authors.affiliation: ITEE, The University of Queensland, Australia.
authors.forename: H
authors.initials: H
authors.lastname: Wang
authors.forename: F
authors.initials: F
authors.lastname: Liu
authors.forename: L
authors.initials: L
authors.lastname: Xia
authors.forename: B K
authors.initials: BK
authors.lastname: Li
authors.forename: S
authors.initials: S
authors.lastname: Crozier
mesh_terms: D000465:Algorithms; D001822:Body Burden; D003198:Computer Simulation; D006801:Humans; D006979:Hyperthermia, Induced / Q000295:instrumentation* / Q000379:methods*; D008954:Models, Biological; D010992:Plethysmography, Impedance / Q000379:methods*; D012062:Relative Biological Effectiveness; D013813:Therapy, Computer-Assisted / Q000379:methods*; D014915:Whole-Body Counting / Q000379:methods*