Enhancing Induced Current Magnetic Resonance Electrical Impedance Tomography (ICMREIT) Image Reconstruction

Nashwan A. Naji, Hasan H. Eroğlu, Kemal Sümser, Mehdi Sadighi, and Murat Eyüboğlu

Keywords

Impedance Imaging, MRI, ICMREIT, Conductivity reconstruction

Abstract

Induced Current Magnetic Resonance Electrical Impedance Tomography (ICMREIT) is an emerging imaging methodology that utilizes Magnetic Resonance Imaging (MRI) techniques to visualize the electrical conductivity as a new contrast. In ICMREIT, by fast switching of gradient fields of Magnetic Resonance (MR) system eddy currents are induced in the imaging volume. The secondary magnetic field generated by the induced eddy currents can be extracted from the MR phase images. Image reconstruction algorithms then use this secondary field map to recover the conductivity distribution. In this paper, a novel approach is proposed to enhance the quality of the reconstructed conductivity maps, from the perspectives of edge preservation and noise sensitivity. Simulated measurements are used to demonstrate the improvements introduced by the proposed method.

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