波谱学杂志2018，Vol.35Issue(1)：52-59,8.DOI:10.11938/cjmr20172593
一种永磁磁共振中磁体涡流场的测量方法
A Method for Eddy Current Field Measurement in Permanent Magnet Magnetic Resonance Imaging Systems
宋瑞 1何砚发 1张波2
作者信息
- 1. 东北大学理学院,辽宁沈阳110004
- 2. 东北大学中荷生物医学与信息工程学院,辽宁沈阳110169
- 折叠
摘要
Abstract
Magnetic resonance imaging (MRI) is a widely used medical imaging technique.In MRI system,gradient magnetic fields are used to code spatial information.However,the fast-switching electric currents in the gradients coils used to generate gradient fields also induce vortex electric field,often referred as eddy current,in the surrounding metal conductors.In this paper,a method for eddy current field measurement was proposed.Based on the Faraday law of electromagnetic induction,an eddy current field measuring device was designed.Combining hardware acquisition and software processing,the eddy current field was obtained by subtracting the ideal gradient field from the magnetic field measured experimentally,whose waveform could be displayed in real time.The proposed method was verified by experimental results.关键词
磁共振成像(MRI)/梯度线圈/涡流场/测量Key words
magnetic resonance imaging (MRI)/gradient coil/eddy current field/measurement分类
数理科学引用本文复制引用
宋瑞,何砚发,张波..一种永磁磁共振中磁体涡流场的测量方法[J].波谱学杂志,2018,35(1):52-59,8.
