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Abstract #0638

Imaging electric conductivity and conductivity anisotropy via eddy currents induced by pulsed field gradients

Chunlei Liu 1,2 , Wei Li 1 , and Ioannis Argyridis 1

1 Brain Imaging and Analysis Center, Duke University, Durham, NC, United States, 2 Radiology, Duke University, Durham, NC, United States

A method was proposed and demonstrated to measure electric conductivity using eddy currents induced by pulsed field gradients. The relationship between conductivity tensor and eddy currents was derived based on Maxwells equations. Simulation, phantom and in vivo brain experiments were conducted to demonstrate that tissue conductivity is measurable by pulsed gradients using standard MRI equipments. By changing gradient orientations, different components of the conductivity tensor can also be assessed. This method provides a new means for MRI to image tissue conductivity and conductivity anisotropy in vivo and non-invasively.

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