1.5 T下高介电材料几何结构对发射场影响的仿真研究

唐德港,李红闯,刘小玲,石磊,李海东,叶朝辉,周欣

A Simulation Study on the Effect of the High Permittivity Materials Geometrical Structure on the Transmit Field $ {B}_{\text{1}}^{\text{+}} $ at 1.5 T

De-gang TANG,Hong-chuang LI,Xiao-ling LIU,Lei SHI,Hai-dong LI,Chao-hui YE,Xin ZHOU

表1 不同几何结构的高介电衬垫仿真模型ROI内的发射效率η均值与$ B_1^ + $不均匀度（CV）

Table 1 The simulated average transmit efficiency η and $ B_1^ + $ inhomogeneity values (CV) in the ROI of different models corresponding to high permittivity pads with different geometrical structures

参数 无HPMs 四等分圆筒状 四方块环绕 同侧三方块 120°扇环柱 发射效率η均值/$ \frac{{{\rm{ \mathsf{ μ} }}{\text{T}}}}{{\sqrt {\text{W}} }} $ 1.52 2.13 2.07 1.59 1.91 CV/% 0.30 1.37 1.23 2.23 9.28