Abstract
Electromagnetic induction imaging (EMI) allows mapping of the conductivity of target objects and, when combined with appropriate algorithms, the generation of full 3D tomographic images. Despite its tremendous potential, and the wealth of possible applications, the use of EMI has essentially been limited to eddy current testing for monitoring of corrosion and welding in metallic structures. The present work reviews the factors hindering the progress of electromagnetic induction imaging and highlights how the use of atomic magnetometers overcame some of them, opening the path to real world applications of EMI. Perspectives for further developments are discussed.
Highlights
Electromagnetic induction imaging (EMI) allows mapping of the electromagnetic properties of an object
This article is aimed at reviewing the motivations which led to the development of EMI with atomic magnetometers, the key enabling role they played in overcoming important limitations of EMI, and the progress so far
The excess of fluid produces an anomaly in the conductivity of the brain tissue, which can in principle be detected via electromagnetic induction imaging techniques [4,10]
Summary
Electromagnetic induction imaging (EMI) allows mapping of the electromagnetic properties of an object. It is not limited to two-dimensional maps and, when combined with appropriate inversion algorithms, it can produce full three-dimensional images. To highlight such tomographic capabilities, it is often referred to as magnetic induction tomography (MIT) [1]. This article is aimed at reviewing the motivations which led to the development of EMI with atomic magnetometers, the key enabling role they played in overcoming important limitations of EMI, and the progress so far.
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