A Design of Array Transcranial Magnetic Stimulation Coil System

This research proposed a new design of helmet-shaped array transcranial magnetic stimulation coil system. It was constructed using several sagittal directional wires and several coronal directional wires. By varying the current direction and strength on each wire, this array coil system could be constructed into the circular coil and figure-eight coil of different size. Also, this proposed coil system can flexibly not only change the stimulation location, range, type and strength, but also change the shape and the channel number of coil dynamically.




References:
[1] S. Ueno, T. Tashiro, K. Harada, "Localized stimulation of neural tissues
in the brain by means of paired configuration of time-varying magnetic
fields," J. Appl. Phys., 64, pp.5862-5864, 1988.
[2] J.T. Cacioppo, L.G. Tassinary, G.G. Berntson, Handbook of
psycho-physiology, 3rd ed., New York, NY: Cambridge Univ. Press. pp.
121, 2007.
[3] D.E. Bohning, Introduction and overview of TMS physics, in M.S.
George, R. H. Belmaker (Editors), Transcranial Magnetic Stimulation in
Neuropsychiatry, pp. 13-44, 2000.
[4] J. Ruohonen, R.J. Ilmoniemi, "Multichannel magnetic stimulation:
improved stimulus targeting," Adv. Occup. Med. & Rehab., 2, 2,
pp.55-64, 1996.
[5] J. Ruohonen, R.J. Ilmoniemi, "Focusing and targeting of magneric brain
stimulation using multiple coils," Med. Biol. Eng. Comput., 36,
pp.297-301, 1998.
[6] J. Ruohonen, P. Ruohonen, F. Grandori, R.J. Ilmoniemi, "Theory of
multichannel magnetic stimulation: toward functional neuromuscular
rehabilitation," IEEE Transactions on Biomedical Engineering, 46, pp.
646-651, 1999.
[7] S.L. Ho, G. Xu, W.N.Fu, Q. Yang, H. Hou, W. Yan, "Optimization of
array magnetic coil design for functional magnetic stimulation based on
improved genetic algorithm," IEEE Transactions on Magnets, 45, 10,
pp.4849-4852, 2009.
[8] B.Y. Han, I.K. Chun, S.C. Lee, S.Y. Lee, "Multichannel magnetic
stimulation system design considering mutual couplings among the
stimulation coils," IEEE Transactions on Biomedical Engineering, 51,
pp.812-817, 2004.
[9] X.M. Wang, Y. Chen, M.X. Guo, M.S. Wang, "Design of multi-channel
brain magnetic stimulator and ANSYS simulation," IJBEM, 7, 1, 2005.
[10] C.H. Im, C. Lee, "Computer-aided performance evaluation of a
multichannel transcranial magnetic stimulation system," IEEE
Transactions on Magnets, 42, 12, pp.3803-3808, 2006.
[11] G.Z. Xu, Y. Chen, S. Yang, M.S. Wang, W.L. Yan, "The optimal design
of magnetic coil in transcranial magnetic stimulation," Proceedings of the
2005 IEEE Engineering in Medicine And Biology 27th Annual
Conference, pp.6221-6224, 2005.
[12] M. Nadeem, M. Persson, O.P. Gandhi, "Computation of Electric and
Magnetic Stimulation in Human Head Using the 3D Impedance
Method, " IEEE Transactions on Biomedical Engineering, 50, pp,
900-907, 2003.