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

图3 不同几何结构的高介电衬垫仿真模型水模中心横断面的发射效率η分布.(a)无衬垫；(b)四等分圆筒状衬垫；(c)四块方形衬垫对称环绕水模；(d)同侧三块方形衬垫；(e) 120°扇环柱状衬垫

Fig.3 The simulated transmit efficiency maps in the central transverse plane of the phantom corresponding to high permittivity pads with different geometrical structures. (a) Without pads; (b) With a quartered cylindrical pad; (c) With four cuboid pads that surround the phantom symmetrically; (d) With three cuboid pads on the same side; (e) With a single annular sector column with a degree of 120°