Impact Factor:7.4

DOI number:10.1109/TIE.2025.3613643

Affiliation of Author(s):仪器科学与光电工程学院

Teaching and Research Group:大科学装置研究院

Journal:IEEE Transactions on Industrial Electronics

Key Words:Magnetic field measurement; Magnetic shielding; Magnetic fields; Magnetic resonance imaging; Coils; Magnetic noise; Harmonic analysis; Magnetic resonance; Active magnetic disturbance suppression; composite controller; harmonic disturbances suppression; linear extended state observer (LESO); nonlinear gradient coil; Signal to noise ratio; State estimation

Abstract:High-power devices used in hospitals generate harmonic magnetic field disturbances inside magnetic shielding cylinders (MSCs). These disturbances exhibit axial-gradient spatial distributions, which substantially degrade the imaging quality of magnetocardiography (MCG). To address this issue, a high-precision nonlinear spatial gradient disturbance suppression method is proposed for single-open MSCs. First, a nonlinear gradient coil design is developed to generate variable magnetic field gradients, precisely matching the nonlinear gradient distribution induced by external magnetic disturbances i

Co-author:Zhongxiang Jing, Fengwen Zhao, Xiangyang Ye, Suhang Li, Yunyang Lian, Gang Liu

First Author:Haifeng Zhang

Indexed by:Journal paper

Discipline:工学

First-Level Discipline:Instrumentation Science and Technology

Document Type:J

Volume:73

Issue:2

Page Number:3316-3327

ISSN No.:0278-0046, 1557-9948

Translation or Not:no

Date of Publication:2026-02-01