Radio Frequency Measurements for Electrical Impedance Tomography

Abstract

Electrical Impedance Tomography (EIT) is a medical imaging technique that employs small alternating currents to produce tomographic images. Usually, a single current frequency is used and the out-of-phase component of the signals is discarded. Here, we present a Radio Frequency (RF) approach based on a Vector Network Analyzer (VNA) for EIT for the first time. This approach allows the simultaneous acquisition of electrical complex signals over a broad frequency range between 10kHz and 1GHz. The results show that the real part of the signals gives the best-reconstructed images and images performed at frequencies higher than 10MHz are unreliable.