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斜位电流注入磁共振电阻抗成像(MREIT)与硬件设计 被引量：2

Magnetic Resonance Electrical Impedance Tomography(MREIT) with Currents Injected from an Oblique Plane: Methods and Hardware Design
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摘要 现有的磁共振电阻抗成像(MREIT)方法只适用于主磁场平行水平面的磁共振系统,本文中提出了一种新的MREIT方法即斜位电流注入磁共振电阻抗成像,同时适用于主磁场垂直于水平面的磁共振系统.硬件系统以磁共振主控计算机为控制中心,将MRI与EIT有机结合于一体:(1)能够测量注入电流在成像体内部感应磁场的磁感应强度B(x,y,z);(2)向成像体注入电流;(3)满足时序匹配要求;(4)测量边界电压.文章还展示了利用此装置所得的初步实验结果. The present magnetic resonance electrical impedance tomography （MREIT） method can only be used in MRI systems in which the main magnetic fields are parallel to the horizontal plane. In this paper, a new MREIT method with currents injected from an oblique plane is proposed. It can be used on MRI scanners with either permanent magnet or superconductive magnet. Using computers to control the MRI system and the electrical impedance tomography （EIT） equipment, we showed that it is possible to （1） measure the magnetic flux density B（x, y, z） generated by the currents injected;（2） inject currents to the imaging object; （3） match perfectly the MRI and EIT sequences in time; （4） measure the magnitudes of surface voltages. Some experimental results were presented.
作者 巩玉香 王慧贤 王玉宇 杨文晖
机构地区 中国科学院电工研究所生物工程部
出处 《波谱学杂志》 CAS CSCD 北大核心 2007年第2期183-189,共7页 Chinese Journal of Magnetic Resonance
基金 国家自然科学基金资助项目(50577064)
关键词 磁共振电阻抗成像 硬件设计 斜位电流注入 magnetic resonance electrical design, currents injected from an oblique impedance tomography （MREIT）, hardware plane
分类号 O482.53 [理学—固体物理]
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参考文献8

  • 1Wang Huixian,Wang Yuyu,Song Tao,et al.A new image reconstruction algorithm for magnetic resonance e lectrical impedance tomography using one component of measured magnetic field[C].Shanghai:Proceedings of the 2005 IEEE EMB 27^th Annual Conference,2005.1-4.
  • 2Scott G C,Joy M L G,Armstrong R L,et al.Measurement of nonuniform current density by magnetic resonance[J].IEEE T Med Imaging,1991,10:362-374.
  • 3Seo J K,Yoon J R,Woo E J,et al.Reconstructidn of conductivity and current density images using only one component of magnetic field measurements[J].IEEE T Bio-Med Eng,2003,50:1 121-1124.
  • 4Oh S H,Lee B I,Woo E J,et al.Conductivity and current density image reconstruction in MREIT using har monic Bz algorithm and recessed electrodes[C].Mexico:Proceedings of the 25^th Annual International Conference of the IEEE EMBS Cancun,2003.17-21.
  • 5何永波,宋涛,王慧贤,杨旭.磁共振电阻抗成像技术[J].北京生物医学工程,2006,25(1):99-102. 被引量：5
  • 6Lee B I,Oh S H,Woo E J,et al.Three-dimensional forward solver and its performance analysis in magnetic resonance electrical impedance tomography(MREIT)using recessed electrodes[J].Phys Med Biol,2003,48:1971-1 986.
  • 7Oh S H,Lee B I,Woo E J,et al.Conductivity and current density image reconstruction using harmonic Bz algorithm in magnetic resonance electrical impedance tomography[J].Phys Med Biol,2003,48:3 101-3 116.
  • 8Oh S H,Lee B I,Park T S,et al.Magnetic resonance electrical impedance tomography at 3 Tesla field strength[J].Mag Reson Med,2004,51:1 292-1 296.

二级参考文献19

  • 1Seagar AD,Barber DC,Brown BH.Theoretical limits to sensitivity and resolution in impedance imaging [J].Clin Phys Physiol Meas,1987,8A:13-31
  • 2Mengxing Tang,Wei Wang,James Wheeler,et al.The number of electrodes and basis functions in EIT image reconstruction [ J ].Physiol Mens,2002,23:129-140
  • 3Scott GC,Joy MLG,Armstrong RL,et al.Measurement of nonuniform current density by magnetic resonance [J].IEEE Trans Med Imaging,1991,10:362-374
  • 4Birgul O,Eyuboglu M,Ider YZ.New technique for high-resolution absolute conductivity imaging using magnetic resonance-electrical impedance tomography (MR-EIT) [ R].Proc Of SPIE International Symposium on medical imaging,2001
  • 5Gamba HE,Bayford D,Holder D.Measurement of electrical current density distribution in a simple head phantom with magnetic resonance imaging [J].Phys Med Biol,1999,44:281-291
  • 6Birgul O,Eyuboglu BM,Ider YZ.Experimental results for 2D magnetic resonance electrical impedance tomography (MR-EIT)using magnetic flux density in one direction [ J ].Phys Med Biol 2003,48:3485-3504
  • 7Eyuboglu BM.An interleaved drive electrical impedance tomography image reconstruction algorithm [ J].Physiol Meas,1996,17:A59-A71
  • 8Zhang N.Electrical Impedance tomography based on current density imaging [D].MSc Thesis,Dept of EE,University of Toronto,1992
  • 9Birgul O,Eyuboglu BM,Ider YZ.Magnetic resonance Conductivity Imaging [R].Proc.of IEEE EMBS Conf,1999,1127
  • 10Kwon O,Woo EJ,Yoon JR,et al.Magnetic resonance electrical impedance tomography (MREIT):simulation study of J-substitution algorithm [J].IEEE Trans Biomed Eng,2002,49:160-167

共引文献4

同被引文献38

  • 1董秀珍.生物电阻抗技术研究进展[J].中国医学物理学杂志,2004,21(6):311-317. 被引量：68
  • 2Zhang N.Electrical impedance tomography based on current density imaging.Toronto:Msc Thesis University of Toronto,1992.
  • 3Eyüboglu BM,Reddy R,Leigh JS.Magnetic resonance electrical impedance tomography:21st Annual Conference and the 1999Annual Fall Meeting of the Biomedical Engineering Society.Atlanta:IEEE,1999:1127.
  • 4Kwon O,Lee JY,Yoon JR.Equipotential line method for magnetic resonance electrical impedance tomography.Inverse Problem,2002,18:1089-1100.
  • 5Ozparlak L,Ider YZ.Induced current magnetic resonanceelectrical impedance tomography.Physiol Meas,2005,26(2,SI):S289-S305.
  • 6Park C,Kwon OI.Current density imaging using directly measured harmonic Bz data in MREIT.Comput Math Methods Med,2013,2013:381507.
  • 7Birgül ,Ider YZ.Electrical impedance tomography suing the magnetic field generated by injected currents:18th Annual international conference of the IEEE Engineering in Medicine and Biology Society.Amsterdam:IEEE,1996:784-785.
  • 8Li G,Chen RJ,Hao LL,et al.Three dimensional MREIT for breast cancer detection on open MRI scanners.Information and Automation(ICIA),2012,33(10):446-450.
  • 9Jeon K,Kim HJ,Lee CO,et al.Integration of the denoising,inpainting and local harmonic B(z)algorithm for MREIT imaging of intact animals.Phys Med Biol,2010,55(24):7541-7556.
  • 10Seo JK,Yoon JR,Woo EJ,et al.Reconstruction of conductivity and current density images using only one component of magnetic field measurements.IEEE Trans Biomed Eng,2003,50(9):1121-1124.

引证文献2

二级引证文献6

波谱学杂志
2007年 第2期

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