A harmonic B-z-based conductivity reconstruction method in MREIT with influence of non-transversal current density

作者：Jeon Kiwan^*; Lee Chang Ock; Woo Eung Je

来源：Inverse Problems in Science and Engineering, 2018, 26(6): 811-833.

DOI：10.1080/17415977.2017.1352587

• MREIT
• B-z-based algorithm
• conductivity and current density reconstruction
• non-transversal current density
• phantom experiment

Magnetic resonance electrical impedance tomography (MREIT) is a high-resolution conductivity imaging method utilizing measured magnetic flux density data induced by externally injected currents. Most MREIT image reconstruction methods including the harmonic B-z algorithm adopt iterative schemes to handle the non-linear relation between conductivity and magnetic flux density. Iterative methods, however, may not guarantee a reliable conductivity reconstruction when the measured magnetic flux density data are contaminated with a significant amount of noise. In this paper, we propose a new image reconstruction method which alleviates the technical difficulties of the iterative harmonic B-z algorithm. It effectively reduces the number of iterations by two at most. To improve the image quality, it incorporates the influence of non-transversal current densities. Providing theoretical observations and details of the proposed algorithm, we present results of numerical simulations and phantom experiments for its validation.

• 出版日期2018