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Abstract #5049

Compensation of lead-wire magnetic field contributions in MREIT experiment using image segmentation: a phantom study

Saurav Zaman Khan Sajib1, Munish Chauhan1, Guita Banan2, Sulagna Sahu1, Luning Wang3, Thomas H. Mareci4, and Rosalind J Sadleir1

1School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ, United States, 2Department of Physics, University of Florida, Gainesville, FL, United States, 3Philips Research, Huston, TX, United States, 4Department of Biochemistry and Molecular Biology, University of Florida, Gainesville, FL, United States

For the measurement of current-induced phase using MRI, the effect of stray magnetic fields caused by the current carrying wire on images must be minimized prior to reconstruction of the current density. In this study, we report a method which can effectively remove the effect of lead wire magnetic fields interference during MREIT measurements. Results from phantom experiments and numerical simulations demonstrate the feasibility of the method, which can be used to correct for lead effects when measuring current density in human transcranial direct current stimulation (tDCS) measurements using magnetic resonance electrical impedance tomography (MREIT).

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