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

doi:10.1109/CIC.2007.4745417

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 proceeding › Conference 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 language	English (US)
Title of host publication	Computers in Cardiology 2007, CAR 2007
Pages	45-48
Number of pages	4
Volume	34
DOIs	https://doi.org/10.1109/CIC.2007.4745417
State	Published - Dec 1 2007
Event	Computers in Cardiology 2007, CAR 2007 - Durham, NC, United States Duration: Sep 30 2007 → Oct 3 2007

Other

Other	Computers in Cardiology 2007, CAR 2007
Country	United States
City	Durham, NC
Period	9/30/07 → 10/3/07

ASJC Scopus subject areas

Computer Science Applications
Cardiology and Cardiovascular Medicine

Access to Document

10.1109/CIC.2007.4745417

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Cite this

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

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.",

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