A 3D model of magnetohydrodynamic voltages: Comparison with voltages observed on the surface ECG during cardiac MRI

G. M. Nijm, S. Swiryn, Andrew Christian Larson, Alan Varteres Sahakian

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

The magnetohydrodynamic (MHD) effect generates voltages which distort the ECG obtained during cardiac MRI. Consequently, MHD voltages result in triggering problems for MR image acquisition. In addition, since the MHD effect is related to blood flow, analysis of it not only as interference, but also as a signal may provide useful blood flow information. Comsol Multiphysics modeling software was used to compute and model the MHD voltages in 3D. These voltages were compared with MHD voltages obtained experimentally from the subtraction of ECGs taken outside the MRI magnet from ECGs taken inside the magnet. The maximum MHD voltage magnitude for the experimental data was 0.2 mV and was 3.04 mV for the modeled data when calculated on the surface of the uniform volume conductor. By modeling MHD voltages in 3D, we can learn about their effect on the ECG during cardiac MRI.

Original languageEnglish (US)
Title of host publicationComputers in Cardiology 2007, CAR 2007
Pages45-48
Number of pages4
Volume34
DOIs
StatePublished - Dec 1 2007
EventComputers in Cardiology 2007, CAR 2007 - Durham, NC, United States
Duration: Sep 30 2007Oct 3 2007

Other

OtherComputers in Cardiology 2007, CAR 2007
CountryUnited States
CityDurham, NC
Period9/30/0710/3/07

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ASJC Scopus subject areas

  • Computer Science Applications
  • Cardiology and Cardiovascular Medicine

Cite this

Nijm, G. M., Swiryn, S., Larson, A. C., & Sahakian, A. V. (2007). A 3D model of magnetohydrodynamic voltages: Comparison with voltages observed on the surface ECG during cardiac MRI. In Computers in Cardiology 2007, CAR 2007 (Vol. 34, pp. 45-48). [4745417] https://doi.org/10.1109/CIC.2007.4745417