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Multifrequency methods for Electrical Impedance Tomography

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Figure

Figure 2.2: The movement of current through cells at low and high frequencies [46].
Figure 2.5: Conductivity spectrum of normal brain tissue, ischaemic brain tissue and blood, adapted from [52].
Figure 3.2: Conductivity values of test tissues obtained from sample measurements at 16 output frequencies of the UCLH Mk 2.5 multifrequency EIT system in the range 640 Hz – 1.29 M Hz.
Figure 3.4: Numerical validation results: perturbation fraction images of positions 1 and 2
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