TISSUE SPECTROSCOPY WITH ELECTRICAL-IMPEDANCE TOMOGRAPHY - COMPUTER-SIMULATIONS

A method is proposed by which bioelectrical spectroscopy could be comb ined with electrical impedance tomography (EIT) to provide noninvasive characterization of tissue. Multifrequency (2-200 kHz) EIT measuremen ts were simulated with a numerical model for a volume of porcine liver immersed in an electrolytic tank. From the reconstructed EIT images t he tissue characterization method was then applied enabling a plot of complex resistivity to be drawn for any selected pixel in the image. S imulations were performed for a small volume of degraded tissue embedd ed in the normal tissue to examine its effect on the derived spectrosc opic parameters, The method could have an application in transplant su rgery for screening organs for tissue degradation.