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Adopting reciprocity theorem in deep transcranial magnetic stimulation problem to design an efficient single source coil array based on nerve cell direction.

Deep transcranial magnetic stimulation (dTMS) plays an important role in the treatment of many diseases. Previous designs rarely considered the direction of the induced electric field (E) with respect to nerve fibers. However, it can be observed from related formulae that the tangential component of...

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Published in:Medical & Biological Engineering & Computing Vol. 56; no. 1; pp. 13 - 24
Main Authors: Mohtadi Jafari, Ali, Abdolali, Ali
Format: Journal Article
Published: Springer Nature Jan2018
Online Access:View this record in EBSCOhost
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      pub: Springer Nature
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        atl: Adopting reciprocity theorem in deep transcranial magnetic stimulation problem to design an efficient single source coil array based on nerve cell direction.
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        au:
          Mohtadi Jafari, Ali
          Abdolali, Ali
        affil: BioElectromagnetic Group, Applied Electromagnetics Laboratory, Department of Electrical Engineering, Iran University of Science and Technology, 16846-13114, Tehran, Iran
      sug:
        subj:
          Transcranial Magnetic Stimulation Equipment and Supplies
          Algorithms
          Neurons Physiology
          Electromagnetic Fields
          Brain Physiology
          Electricity
      ab: Deep transcranial magnetic stimulation (dTMS) plays an important role in the treatment of many diseases. Previous designs rarely considered the direction of the induced electric field (E) with respect to nerve fibers. However, it can be observed from related formulae that the tangential component of E (E effective) has a more significant role in the stimulation of nerve cells. In this paper, a new approach is proposed for designing a single-source coil array (CA) by combining tractography and the reciprocity theorem (RT). This method is a non-iterative procedure that can directly design CAs for the stimulation of each desired target zone without any complicated and slow iterative algorithm. Specifications of CA such as the optimum spatial angle and the best placement of coils are important because the location of the coil around the head and its spatial angle have been shown to have a major effect on induced E. Adoption of the RT yields the optimum specifications of CA and maximum E effective at the stimulation zone. This novel technique can introduce a new approach for the application of CA since it entails a high flexibility, high speed, and good accuracy.
      pubtype: Academic Journal
      doctype: Journal Article
      ougenre: Article
    language: English
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