Obtaining accurate and calibrated coil models for transcranial magnetic stimulation using magnetic field measurements.
Currently, simulations of the induced currents in the brain produced by transcranial magnetic stimulation (TMS) are used to elucidate the regions reached by stimuli. However, models commonly found in the literature are too general and neglect imperfections in the windings. Aiming to predict the stim...
| Publicado en: | Medical & Biological Engineering & Computing Vol. 58; no. 7; pp. 1499 - 1515 |
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| Autores principales: | , , , , , |
| Formato: | Journal Article |
| Publicado: |
Springer Nature
Jul2020
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=143819682&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 143819682 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 01400118 PO0 jtl: Medical & Biological Engineering & Computing issn: 01400118 maglogo: N pubinfo: dt: Jul2020 vid: 58 iid: 7 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 143819682 143819682 144055979 NLM32385790 10.1007/s11517-020-02156-2 NLM32385790 143819682 ppf: 1499 ppct: 16 formats: fmt: @attributes: type: P tig: atl: Obtaining accurate and calibrated coil models for transcranial magnetic stimulation using magnetic field measurements. aug: au: Mancino, A. V. Milano, F. E. Bertuzzi, F. Martin Yampolsky, C. G. Ritacco, L. E. Risk, M. R. affil: Departamento de Bioingenieria, Instituto Tecnológico de Buenos Aires, AR 1106, Buenos Aires, Argentina sug: subj: Transcranial Magnetic Stimulation Methods Therapy, Computer Assisted Methods Calibration Brain Transcranial Magnetic Stimulation Equipment and Supplies Models, Biological Algorithms Clinical Assessment Tools Questionnaires ab: Currently, simulations of the induced currents in the brain produced by transcranial magnetic stimulation (TMS) are used to elucidate the regions reached by stimuli. However, models commonly found in the literature are too general and neglect imperfections in the windings. Aiming to predict the stimulation sites in patients requires precise modeling of the electric field (E-field), and a proper calibration to adequate to the empirical data of the particular coil employed. Furthermore, most fabricators do not provide precise information about the coil geometries, and even using X-ray images may lead to subjective interpretations. We measured the three components of the vector magnetic field induced by a TMS figure-8 coil with spatial resolutions of up to 1 mm. Starting from a computerized tomography-based coil model, we applied a multivariate optimization algorithm to automatically modify the original model and obtain one that optimally fits the measurements. Differences between models were assessed in a human brain mesh using the finite-elements method showing up to 6% variations in the E-field magnitude. Our calibrated model could increase the precision of the estimated E-field induced in the brain during TMS, enhance the accuracy of delivered stimulation during functional brain mapping, and improve dosimetry for repetitive TMS. Graphical Abstract Geometrical model of TMS coil based on TAC images is optimally deformed to match magnetic field measurements. The calibrated model's induced electric field in the brain differs from the original. pubtype: Academic Journal doctype: Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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