Electrical tissue property imaging at low frequency using MREIT

Jin Keun Seo, Eung Je Woo

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

The tomographic imaging of tissue's electrical properties (e.g., conductivity and permittivity) has been greatly improved by recent developments in magnetic resonance (MR) imaging techniques, which include MR electrical impedance tomography (MREIT) and electrical property tomography. When the biological material is subjected to an external electric field, local changes in its electrical properties become sources of magnetic field perturbations, which are detectable by the MR signals. Controlling the external excitation and measuring the responses using an MRI scanner, we can formulate the imaging problem as an inverse problem in which unknown tissue properties are recovered from the acquired MR signals. This inverse problem is nonlinear; it involves the incorporation of Maxwell's equations and Bloch equations during data acquisition. Each method for visualizing internal conductivity and permittivity distributions has its own methodological limitations, and is restricted to imaging only a part of the ensemble or mean tissue structures or states. Therefore, imaging methods can be improved by developing complementary methods that can employ the beneficial aspects of various existing techniques. This paper focuses on recent progress in MREIT and discusses its distinct features in comparison with other imaging methods.

Original languageEnglish
Article number6705619
Pages (from-to)1390-1399
Number of pages10
JournalIEEE Transactions on Biomedical Engineering
Volume61
Issue number5
DOIs
Publication statusPublished - 2014 Jan 1

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Acoustic impedance
Tomography
Magnetic resonance
Tissue
Imaging techniques
Electric properties
Inverse problems
Permittivity
Maxwell equations
Biological materials
Magnetic resonance imaging
Data acquisition
Electric fields
Magnetic fields

All Science Journal Classification (ASJC) codes

  • Biomedical Engineering

Cite this

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Electrical tissue property imaging at low frequency using MREIT. / Seo, Jin Keun; Woo, Eung Je.

In: IEEE Transactions on Biomedical Engineering, Vol. 61, No. 5, 6705619, 01.01.2014, p. 1390-1399.

Research output: Contribution to journalArticle

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