Model implementation and case study for the lossy, multilayered spherical head phantom in MRI application.
To better simulate RF field behavior in the human head for MRI applications, dyadic Green's function (DGF)/method of moment (DGF/MOM) -based solutions of the electromagnetic field (EMFs) inside a head-sized, stratified sphere in different MRI coils are presented. The lossy, multilayered spherical head phantom has similar radial conductivity and permeability profiles as human head and is loaded in MRI surface and RF volume coils. B1field pattern, SAR distribution, flip angle, signal intensity (SI), and other MRI image parameters are calculated in this study. The results reported herein show the operating characteristics of the field/tissue interactions and safety properties for human head model in different coils.
Xu
Bin
B
Sch. of Inf. Technol. & Electr. Eng., Queensland Univ., Qld.
Keong Li
Bing
B
Crozier
Stuart
S
Wei
Qing
Q
Liu
Feng
F