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Induced Current Electrical Impedance Tomography
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219 b
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In Electrical Impedance Tomography (EIT), the §electrical properties of the various tissue types §form the basis for monitoring or imaging §physiological and pathological processes. The §technique requires the applying of small magnitude §electrical current into the object under §investigation, measurement of the developing §potentials on the surface, and solving the §mathematically ill-posed, non-linear inverse §problem, relating the measurements to the electrical §properties of interest. This book describes the §induced-current EIT (ICEIT) approach, in which §current is applied into the object by magnetic §induction using excitation coils rather than by §direct injection via surface electrodes as in §conventional EIT. The physical and mathematical §models of ICEIT are established and numerical §approaches to solve the forward and inverse problems §are detailed. The technique's applicability to §several medical applications, including thoracic §imaging, monitoring cryosurgery procedure in the §brain and monitoring lung fluid volume, is discussed.
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