Magnetic flux density measurement through phase decomposition using non-interleaved scan in MREIT

Magnetic resonance electrical impedance tomography (MREIT) measures the z-component of magnetic flux density B = (B_x, B_y, B_z) induced by externally injected current through a pair of electrodes. MREIT visualises in-vivo electrical current density and/or conductivity distribution in a three-dimensional imaging object from the measured magnetic flux density B_z. MREIT techniques typically use the phase difference approach in an interleaved encoding scheme by the injection of positive and negative currents to cancel systematic phase artefacts. Developed is a method to measure B_z data using only a single scan by the injection of one current, avoiding the interleaved encoding scheme. The method separates measured multiple k-space lines into acquired k-space lines with and without injection currents and develops an algorithm to measure the magnetic flux density B_z using acquired k-space lines by the injecting current. Results from phantom experiments demonstrate that the method has potential to measure magnetic flux density using only a single scan by the injection of one current.