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Arrangement of the electrodes used in the combined EIT/ultrasound (US) probe. A total of 30 electrodes are arranged in a rectangular pattern and printed on a flexible substrate. This EIT sensing array is applied to the US imaging probe, and the central ‘window’, not covered by electrodes, allows the US scanning element, housed inside the probe, to scan the volume of the prostate with no interference. (a) Electrode layout. (b) FEM model of the probe tip and electrodes.
