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Optimization of magnetic neurostimulation waveforms for minimum power loss.

Publication ,  Journal Article
Goetz, SM; Truong, NC; Gerhofer, MG; Peterchev, AV; Herzog, H-G; Weyh, T
Published in: Annu Int Conf IEEE Eng Med Biol Soc
2012

Magnetic stimulation is a key tool in experimental brain research and several clinical applications. Whereas coil designs and the spatial field properties have been intensively studied in the literature, the temporal dynamics of the field has received little attention. The available pulse shapes are typically determined by the relatively limited capabilities of commercial stimulation devices instead of efficiency or optimality. Furthermore, magnetic stimulation is relatively inefficient with respect to the required energy compared to other neurostimulation techniques. We therefore analyze and optimize the waveform dynamics with a nonlinear model of a mammalian motor axon for the first time, without any pre-definition of waveform candidates. We implemented an unbiased and stable numerical algorithm using variational calculus in combination with a global optimization method. This approach yields very stable results with comprehensible characteristic properties, such as a first phase which reduces ohmic losses in the subsequent pulse phase. We compare the energy loss of these optimal waveforms with the waveforms generated by existing magnetic stimulation devices.

Duke Scholars

Published In

Annu Int Conf IEEE Eng Med Biol Soc

DOI

EISSN

2694-0604

Publication Date

2012

Volume

2012

Start / End Page

4652 / 4655

Location

United States

Related Subject Headings

  • Radiation Dosage
  • Motor Neurons
  • Models, Neurological
  • Magnetic Fields
  • Magnetic Field Therapy
  • Humans
  • Energy Transfer
  • Computer Simulation
  • Axons
  • Animals
 

Citation

APA
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ICMJE
MLA
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Goetz, S. M., Truong, N. C., Gerhofer, M. G., Peterchev, A. V., Herzog, H.-G., & Weyh, T. (2012). Optimization of magnetic neurostimulation waveforms for minimum power loss. Annu Int Conf IEEE Eng Med Biol Soc, 2012, 4652–4655. https://doi.org/10.1109/EMBC.2012.6347004
Goetz, S. M., N. C. Truong, M. G. Gerhofer, A. V. Peterchev, H. -. G. Herzog, and T. Weyh. “Optimization of magnetic neurostimulation waveforms for minimum power loss.Annu Int Conf IEEE Eng Med Biol Soc 2012 (2012): 4652–55. https://doi.org/10.1109/EMBC.2012.6347004.
Goetz SM, Truong NC, Gerhofer MG, Peterchev AV, Herzog H-G, Weyh T. Optimization of magnetic neurostimulation waveforms for minimum power loss. Annu Int Conf IEEE Eng Med Biol Soc. 2012;2012:4652–5.
Goetz, S. M., et al. “Optimization of magnetic neurostimulation waveforms for minimum power loss.Annu Int Conf IEEE Eng Med Biol Soc, vol. 2012, 2012, pp. 4652–55. Pubmed, doi:10.1109/EMBC.2012.6347004.
Goetz SM, Truong NC, Gerhofer MG, Peterchev AV, Herzog H-G, Weyh T. Optimization of magnetic neurostimulation waveforms for minimum power loss. Annu Int Conf IEEE Eng Med Biol Soc. 2012;2012:4652–4655.

Published In

Annu Int Conf IEEE Eng Med Biol Soc

DOI

EISSN

2694-0604

Publication Date

2012

Volume

2012

Start / End Page

4652 / 4655

Location

United States

Related Subject Headings

  • Radiation Dosage
  • Motor Neurons
  • Models, Neurological
  • Magnetic Fields
  • Magnetic Field Therapy
  • Humans
  • Energy Transfer
  • Computer Simulation
  • Axons
  • Animals