永磁开放式MR系统中梯度线圈性能参数优化方案  

Optimized scheme of performance parameters of gradient coils for permanent magnetic open architecture MR system

作　　者：黄清明[1,2,3] 陈珊珊[2] 汪红志[1,2,3] 徐小萍[1,2,3] 杨培强 张学龙[1,2,3] 

机构地区：[1]上海医疗器械高等专科学校医学影像设备系,上海200093 [2]上海理工大学医学影像工程研究所,上海200093 [3]纽迈-上海医疗器械高等专科学校MR分析测试中心,上海200093 [4]上海纽迈电子科技有限公司,上海200333

出　　处：《中国医学影像技术》2011年第9期1913-1917,共5页Chinese Journal of Medical Imaging Technology

基　　金：上海市教育委员会和上海市教育发展基金会第四届"晨光计划"项目(2010CGB02);上海高校选拔培养优秀青年教师科研专项基金(2010slgl0046)

摘　　要：针对MRI系统中梯度线圈对图像质量和高端应用领域要求的直接决定因素,在对梯度线圈性能指标优化理论的基础上,构建了通过Matlab实现反演计算、Ansoft模拟仿真电磁场分布,设计永磁开放式平板梯度线圈(x、y、z)几何结构、电感等参数,以满足梯度场强度、梯度线性度、切换率、梯度电感等梯度线圈性能参数系统优化方案和参数检测平台。实验结果表明此方案具有一定的工程实用价值。In view of MRI gradient coils is one the directly determining factors of imaging quality and high-end application field requirements.Based on optimization theory about gradient coils performance index,construction of the optimized scheme of magnetic resonance gradient coils performance parameters and performance index testing platform was performed,including back-stepping design by Matlab and the simulation of electromagnetic field distribution with Ansoft,and the design of geometric structure and electric inductance,etc.,as well as performance parameters for permanent magnetism open architecture plate gradient coils（x,y,z）,in order to satisfy with gradient field intensity,functionally gradient linearity,slew rate,gradient variation of inductance,etc.,as well as performance parameters for gradient coils.Experiment results showed that the scheme has some practical value in engineering.

关 键 词：磁共振成像 梯度线圈 Matlab/Ansoft 梯度磁场 涡流 

分 类 号：R445.2[医药卫生—影像医学与核医学]