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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