• 文献检索
  • 文档翻译
  • 深度研究
  • 学术资讯
  • Suppr Zotero 插件Zotero 插件
  • 邀请有礼
  • 套餐&价格
  • 历史记录
应用&插件
Suppr Zotero 插件Zotero 插件浏览器插件Mac 客户端Windows 客户端微信小程序
定价
高级版会员购买积分包购买API积分包
服务
文献检索文档翻译深度研究API 文档MCP 服务
关于我们
关于 Suppr公司介绍联系我们用户协议隐私条款
关注我们

Suppr 超能文献

核心技术专利:CN118964589B侵权必究
粤ICP备2023148730 号-1Suppr @ 2026

文献检索

告别复杂PubMed语法,用中文像聊天一样搜索,搜遍4000万医学文献。AI智能推荐,让科研检索更轻松。

立即免费搜索

文件翻译

保留排版,准确专业,支持PDF/Word/PPT等文件格式,支持 12+语言互译。

免费翻译文档

深度研究

AI帮你快速写综述,25分钟生成高质量综述,智能提取关键信息,辅助科研写作。

立即免费体验

磁共振成像射频线圈中样本上的磁感应表面电荷:对电场、样本损耗和线圈共振的影响。

Magnetically induced surface charges on samples in magnetic resonance imaging radio-frequency coils: effect on electric fields, sample losses, and coil resonance.

作者信息

Harpen M D

机构信息

University of South Alabama, Department of Radiology, Mobile 36617.

出版信息

Med Phys. 1990 May-Jun;17(3):362-8. doi: 10.1118/1.596516.

DOI:10.1118/1.596516
PMID:2385193
Abstract

We present a solution to Maxwell's equations which describe the inductive interaction between an irregularly shaped sample in a magnetic resonance imaging rf coil. It is demonstrated that the inductive interaction between the coil and sample can induce charge densities on the sample surface and that these charge densities lead to observable changes in coil Q, resonant frequency offset and sample power dissipation.

摘要

我们提出了一种麦克斯韦方程组的解决方案,该方程组描述了磁共振成像射频线圈中不规则形状样本之间的感应相互作用。结果表明,线圈与样本之间的感应相互作用会在样本表面感应出电荷密度,并且这些电荷密度会导致线圈品质因数、共振频率偏移和样本功率耗散出现可观测的变化。

相似文献

1
Magnetically induced surface charges on samples in magnetic resonance imaging radio-frequency coils: effect on electric fields, sample losses, and coil resonance.磁共振成像射频线圈中样本上的磁感应表面电荷:对电场、样本损耗和线圈共振的影响。
Med Phys. 1990 May-Jun;17(3):362-8. doi: 10.1118/1.596516.
2
Method for nonlinear characterization of radio frequency coils made of high temperature superconducting material in view of magnetic resonance imaging applications.考虑到磁共振成像应用,对由高温超导材料制成的射频线圈进行非线性表征的方法。
Rev Sci Instrum. 2007 Dec;78(12):124703. doi: 10.1063/1.2825241.
3
Analysis of the interaction between an MRI coil and a heterogeneous sample.磁共振成像(MRI)线圈与异质样本之间相互作用的分析
Phys Med Biol. 1991 Jan;36(1):133-41. doi: 10.1088/0031-9155/36/1/012.
4
Analysis of capacitive coupling and associated loss for a solenoidal magnetic resonance imaging radio-frequency coil.螺线管磁共振成像射频线圈的电容耦合及相关损耗分析。
Med Phys. 1989 Mar-Apr;16(2):234-8. doi: 10.1118/1.596374.
5
Radio frequency coil technology for small-animal MRI.用于小动物磁共振成像的射频线圈技术
NMR Biomed. 2007 May;20(3):304-25. doi: 10.1002/nbm.1149.
6
A PIN diode controlled dual-tuned MRI RF coil and phased array for multi nuclear imaging.一种 PIN 二极管控制的双调谐 MRI 射频线圈和相控阵,用于多核成像。
Phys Med Biol. 2010 May 7;55(9):2589-600. doi: 10.1088/0031-9155/55/9/011. Epub 2010 Apr 14.
7
Towards a complete coil array.迈向完整的线圈阵列。
Magn Reson Imaging. 2008 Nov;26(9):1310-5. doi: 10.1016/j.mri.2008.02.002. Epub 2008 Apr 28.
8
Slotted resonator: principles and applications for high-frequency imaging and spectroscopy on electrically conducting samples.开槽谐振器:用于导电样品高频成像和光谱分析的原理及应用
Magn Reson Imaging. 1990;8(3):345-9. doi: 10.1016/0730-725x(90)90109-f.
9
A time-harmonic inverse methodology for the design of RF coils in MRI.一种用于磁共振成像中射频线圈设计的时谐逆方法。
IEEE Trans Biomed Eng. 2002 Jan;49(1):64-71. doi: 10.1109/10.972841.
10
Analysis of sample power loss in MRI gradient fields.磁共振成像梯度场中样本功率损耗分析
Med Phys. 1991 Mar-Apr;18(2):313-5. doi: 10.1118/1.596677.