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Volume 24 Issue 6
Jun.  2002
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Li Jun, Zhu Hongyi, Sailing He. Genetic algorithm combined with local optimization in MEG\s inverse solution[J]. Journal of Electronics & Information Technology, 2002, 24(6): 800-804.
Citation: Li Jun, Zhu Hongyi, Sailing He. Genetic algorithm combined with local optimization in MEG\s inverse solution[J]. Journal of Electronics & Information Technology, 2002, 24(6): 800-804.

Genetic algorithm combined with local optimization in MEG\s inverse solution

  • Received Date: 2000-08-04
  • Rev Recd Date: 2001-02-19
  • Publish Date: 2002-06-19
  • MEGs inversion is an important aspect in MEG studies. Generally, global optimization methods are usually used on estimating parameters of multidipole source, but these methods are of low convergence speed. To increase the computing speed, a strategy based on genetic algorithm combined with local optimization is adopted. This method has the ability of overcoming the problem of local minima, and has fast convergence speed. Computer simulation with real brain-shaped head model demonstrated the efficiency of the proposed strategy.
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  • M. Hamalainen, R. Hari, et al., Magnetoencephalography theory, instrumentation, and applications to noninvasive studies of the working human brain, Rev. Mod. Phys, 1993, 65(2), 413-497.[2]R. Hari, O. V. Lounasmaa, Recording and interpretation of cerebral magnetic fields.[J]. Science.1989,244:432-[3]N. Forss, Magnetoencephalography..(MEG) in epilepsy surgery , ActaNeurochur, [suppl], 1997,58, 81-84.[4]B.N. Cuffin, Effects of fissures in the brain on electroencephalograms and magnetoencephalograms, J. Appl. Phys, 1985, 57(1), 146-153.[5]K. Uutela, M. Hamalainen, R. Salmelin,Global optimization in the localization of neuromagnetic sources, IEEE Trans. on Biomed. Eng., 1998, 45(6), 716-723.[6]M. Hamalainen, J. Sarvas, Feasibility of the homogeneous head model in the interpretation of neuromagnetic fields, Phys. Med. Biol., 1987, 32(1), 91-97.[7]J.C. Mosher, R. M. Leahy, P. S. Lewis, EEG and MEG: Forward solutions for inverse methods.IEEE Trans. on Biomed. Eng., 1999, 46(3), 245-259.
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