磁共振成像中涡流的补偿方法研究  

Study on eddy current compensation for magnetic resonance imaging system

作　　者：李璟 刘正敏[2] 诸葛斌[2] 武海澄[2] 周荷琴[2] 

机构地区：[1]宁波鑫高益磁材有限公司,余姚市315400 [2]中国科学技术大学自动化系,合肥市230027

出　　处：《医疗卫生装备》2004年第9期9-9,12,共2页Chinese Medical Equipment Journal

摘　　要：在磁共振成像过程中,涡流是影响图像质量的重要因素之一。本文分析了永磁型磁共振仪中涡流产生的原因,介绍了几种常用的涡流补偿方法,并提出一种快速的涡流预增强补偿参数调试方法。通过在XGYOPER-0.3型磁共振仪上进行实验,对涡流进行了有效的补偿,明显提高了图像质量。Eddy current is one of the most important factors that influence image quality during the process of magnetic resonance imaging. This paper analyzes the reason that eddy current appears and introduces several methods to compensate it. A new method to adjust parameters of eddy current compensation is developed, which proves efficient to enhance image quality through XGY OPER-0.3 MRI system.

关 键 词：磁共振成像系统 涡流 梯度电流 

分 类 号：R445.2[医药卫生—影像医学与核医学] TM154.21[医药卫生—诊断学]