A Simulation Study on the Effect of the High Permittivity Materials Geometrical Structure on the Transmit Field B+1 at 1.5 T

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

doi:10.11938/cjmr20212904

Chinese Journal of Magnetic Resonance (Jun 2022)

A Simulation Study on the Effect of the High Permittivity Materials Geometrical Structure on the Transmit Field B+1 at 1.5 T

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

Affiliations

De-gang TANG: 1. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China 2. University of Chinese Academy of Sciences, Beijing 100049, China
Hong-chuang LI: 1. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China 2. University of Chinese Academy of Sciences, Beijing 100049, China
Xiao-ling LIU: 1. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China 2. University of Chinese Academy of Sciences, Beijing 100049, China
Lei SHI: 1. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China 2. University of Chinese Academy of Sciences, Beijing 100049, China
Hai-dong LI: 1. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China 2. University of Chinese Academy of Sciences, Beijing 100049, China
Chao-hui YE: 1. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China 2. University of Chinese Academy of Sciences, Beijing 100049, China
Xin ZHOU: 1. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China 2. University of Chinese Academy of Sciences, Beijing 100049, China

DOI: https://doi.org/10.11938/cjmr20212904
Journal volume & issue: Vol. 39, no. 02
pp. 155 – 162

Abstract

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Recent studies show that high permittivity materials (HPMs) have great application prospects in improving the performance of RF coils and enhancing magnetic resonance image signal to noise ratio (SNR) in high and ultra-high field magnetic resonance imaging (MRI). So far the research about HPMs mainly focuses on its benefit for MRI image SNR, while investigation on how its geometrical structure affects the homogeneity of transmit field (B+1) is insufficient. In this study the effect of the geometrical structure of HPMs on the average transmit efficiency and B+1 inhomogeneity at 1.5 T was quantitatively analyzed through electromagnetic simulation. The results indicated that for the four investigated geometrical structures of HPMs the quartered cylinder is the optimum solution, which would be valuable for the application of HPMs in MRI.

Published in Chinese Journal of Magnetic Resonance

ISSN: 1000-4556 (Print)
Publisher: Science Press
Country of publisher: China
LCC subjects: Science: Physics: Electricity and magnetism
Website: http://121.43.60.238/bpxzz/EN/1000-4556/home.shtml

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