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  Transcranial magnetic stimulation: An automated procedure to obtain coil-specific models for field calculations

Madsen, K., Ewald, L., Siebner, H., & Thielscher, A. (2015). Transcranial magnetic stimulation: An automated procedure to obtain coil-specific models for field calculations. Brain Stimulation, 8(6), 1205-1208. doi:10.1016/j.brs.2015.07.035.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-43BB-1 Version Permalink: http://hdl.handle.net/21.11116/0000-0000-B4BC-1
Genre: Journal Article

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 Creators:
Madsen, KH, Author
Ewald, L, Author
Siebner, HR, Author
Thielscher, A1, Author              
Affiliations:
1Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497796              

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 Abstract: Background Field calculations for transcranial magnetic stimulation (TMS) are increasingly implemented online in neuronavigation systems and in more realistic offline approaches based on finite-element methods. They are often based on simplified and/or non-validated models of the magnetic vector potential of the TMS coils. Objective To develop an approach to reconstruct the magnetic vector potential based on automated measurements. Methods We implemented a setup that simultaneously measures the three components of the magnetic field with high spatial resolution. This is complemented by a novel approach to determine the magnetic vector potential via volume integration of the measured field. Results The integration approach reproduces the vector potential with very good accuracy. The vector potential distribution of a standard figure-of-eight shaped coil determined with our setup corresponds well with that calculated using a model reconstructed from x-ray images. Conclusion The setup can supply validated models for existing and newly appearing TMS coils.

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 Dates: 2015-11
 Publication Status: Published in print
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 Rev. Method: -
 Identifiers: DOI: 10.1016/j.brs.2015.07.035
BibTex Citekey: MadsenEST2015
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Title: Brain Stimulation
Source Genre: Journal
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Pages: - Volume / Issue: 8 (6) Sequence Number: - Start / End Page: 1205 - 1208 Identifier: -