磁刺激八字线圈变形对空间磁场与感应电场分布的影响

doi:10.3969/j.issn.0258-8021. 2014. 04.06

Abstract
Figure/Table
References (0)
Related Citation (4)

Download: PDF (2297 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Although the focality of conventional figureofeight (fo8) coil is superior to that of round coil in transcranial magnetic stimulation, there still exists higher magnetic fields and induced electric fields near the outer rim of double wings of fo8 coil. In this paper, we presented a deformed figureofeight coil (Dfo8) by bending its two wings from the surface of the coil. The distribution of magnetic fields and the induced electric fields were calculated numerically, and the results were compared with those of conventional fo8. Results show that when the bending angle for Dfo8 was between 45 degree and 60 degree, the magnetic fields and the induced electric fields over the centre position of Dfo8 were about 90% of that of fo8, while the magnetic fields and the induced electric fields over the outer rim of Dfo8 were about 30% of that of fo8. It is indicated that the focality of the magnetic fields and the induced electric fields has been improved by Dfo8 coil, which provided a new method for designing the new transcranial magnetic stimulation coil.

Key words： transcranial magnetic stimulation figureofeight coil bending deformation focality numerical simulation

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	WEI Kong Bing¹LU Mai^2*DONG Xu Wei²CHEN Xiao Qiang¹PAN Qiang Qiang^2

Cite this article:

WEI Kong Bing¹LU Mai^2*DONG Xu Wei²CHEN Xiao Qiang¹PAN Qiang Qiang^2. Effects of Shape Deformation of Figure\|Eight Coil on the Distribution of Space Mangnetic Fields and Induced Electric Fields in Magnetic Stimulation#br#[J]. journal1, 2014, 33(4): 425-431.

URL:

http://cjbme.csbme.org/EN/ 10.3969/j.issn.0258-8021. 2014. 04.06 OR http://cjbme.csbme.org/EN/Y2014/V33/I4/425

［1］Barker AT, Jalinous R, Freeston IL. Noninvasive simulation of the human motor cortex ［J］. The Lancet, 1985, 1(8437): 1106-1107.
［2］Berardelli A, Suppa A. Recent advances in the pathophysiology of parkinson’s disease:Evidence from fMRI and TMS studies ［J］. Experimental Neurology, 2011, 227(1): 10-12.［3］Sampson SM, Solvason HB, Husain MM. Envisioning transcranial magnetic stimulation(TMS) as a clinical treatment option for depression ［J］. Psychiatric Annals, 2007, 37(3): 189-196.
［4］Levkovitz Y, Sheer A, Harel EV, et al. Differential effects of deep TMS of the prefrontal cortex on apathy and depression ［J］. Brain Stimulation, 2011, 23(6): 529-536.
［5］Ueno S, Tashiro T, Harada K. Localized stimulation of neural tissues in the brain by means of a paired configuration of timevarying magnetic fields ［J］. J Appl Phys, 1988, 64(10): 5862-5864.
［6］殷涛，刘志朋. 脑磁刺激空间感应电场分布的数学模型与计算机仿真［J］.中国生物医学工程学报, 2004, 19(1): 62-66.
［7］刘国强，霍小林. 三层球模型经颅磁刺激感应电场研究［J］. 中国生物医学工程学报, 2004, 23(1): 83-86.
［8］陈勇，徐桂芝，杨硕, 等. 经颅磁刺激线圈设计及分析［J］. 华北电力大学学报，2005, 32(S1): 98-101.
［9］王品，郑小林. 磁刺激中脑内感应电场的计算［J］. 中国生物医学工程学报, 2006, 25(1):74-78.
［10］蒲丽娜，殷涛，安好，等. 提高脑神经磁刺激感应电场聚焦性能的线圈参数优化方法的研究［J］. 生物医学工程研究, 2008, 27(2): 74-78.
［11］刘翠，刘冀成. 经颅磁刺激下二维头部模型的磁场分布［J］. 成都信息学院学报，2010, 25(5): 481-484.
［12］Lu M, Ueno S, Thorlin T, et al. Calculating the current density and electric field in human head by multichannel transcranial magnetic stimulation ［J］. IEEE Trans Magnetics, 2009, 45(3): 1662-1665.
［13］Lu M, Ueno S, Thorlin T, et al. Calculating the activating function in the human brain by transcranial magnetic stimulation ［J］. IEEE Transactions on Magnetics, 2008, 44(6): 1438-1441.
［14］冯慈璋，马西奎. 工程电磁场导论［M］. 北京：高等教育出版社，2000, 92-94.
［15］Gershon AA, Dannon PB, Grunhaus L. Transcranial magnetic stimulation in the treatment of depression ［J］. American Journal of Psychiatry, 2003, 160(5): 835-845. 
［16］Orcutt N, Gandhi OP. A3D impedance method to calculation power deposition in biological bodies subjected to timevarying magneticfields ［J］. IEEE Trans Biomedical Engineering, 1988, 35(8): 577-583.
［17］Lontis ER, Voigt M, Struijk JJ. Focality assessment in transcranial magnetic stimulation with double and cone coils ［J］. Journal of Clinical Neurophysiology, 2006, 23(5): 462-471.
［18］Roth Y, Amir A, Levkovitz Y, et al. Threedimensional distribution of the electric field induced in the brain by transcranial magnetic stimulation using figure8 and deep Hcoils ［J］. Journal of Clinical Neurophysiology, 2007, 24(1): 31-38.
［19］Ren C, Tarjan PP, Popovic DB. A novel electric design for electromagnetic stimulation—the Slinky coil ［J］. IEEE Trans Biomedical Engineering, 1995, 42(9): 918-925.
［20］Ruohonen J, Ilmoniemi RJ. Focusing and targeting of magnetic brain stimulation using multiple coils ［J］. Medical & Biological Engineering & Computing, 1998, 36(3): 297-301.［21］刘志朋，殷涛，关晓光. 一种抑制反向感应电场的磁刺激线圈设计方法探讨［J］. 生物医学工程学杂志, 2003, 20(1):45-48.