标题：Analysis of Stray Field of Actively Shielded MRI magnet
作者：Liang, Zhenguang; Wang, Zexiong; Li, Peiyong
作者机构：[Liang, Zhenguang; Wang, Zexiong] Shandong Univ, Sch Elect Engn, Jinan, Shandong, Peoples R China.; [Li, Peiyong] Weifang Xinli Superconducting Magn 更多
会议名称：5th IEEE International Symposium on Electromagnetic Compatibility (EMC-Beijing)
会议日期：OCT 28-31, 2017
来源：2017 IEEE 5TH INTERNATIONAL SYMPOSIUM ON ELECTROMAGNETIC COMPATIBILITY (EMC-BEIJING)
关键词：magnetic resonance imaging; superconducting magnet; stray field; active; shielding
摘要：Stray field outside of magnetic resonance imaging (MRI) magnet must be confined to five gauss in a limited region. It's hard to high field MRI system. In the paper, calculation of magnetic field of MRI magnet is studied. Approximate expression of stray field outside of MRI magnet is deduced. Influence of shielding coil position on stray field is analyzed and an expression determining shielding coil position is given to cancel stray field of negative five orders.