TY - GEN
T1 - A 3D model of magnetohydrodynamic voltages
T2 - Computers in Cardiology 2007, CAR 2007
AU - Nijm, G. M.
AU - Swiryn, S.
AU - Larson, A. C.
AU - Sahakian, A. V.
PY - 2007
Y1 - 2007
N2 - 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.
AB - 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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U2 - 10.1109/CIC.2007.4745417
DO - 10.1109/CIC.2007.4745417
M3 - Conference contribution
AN - SCOPUS:62249159016
SN - 9781424425334
T3 - Computers in Cardiology
SP - 45
EP - 48
BT - Computers in Cardiology 2007, CAR 2007
Y2 - 30 September 2007 through 3 October 2007
ER -