H. Ammari, Editor RECENT PROGRESS ON FREQUENCY DIFFERENCE ELECTRICAL IMPEDANCE TOMOGRAPHY

Abstract. Although time-dierence EIT(tdEIT) has shown promise as a medical EIT imaging tech-nique such as monitoring lung function, static EIT has suered from forward computational model errors including boundary geometry and electrode positions uncertainty combined with the ill-posed and highly nonlinear nature of the corresponding inverse problem. Since 1980s, there has been great endeavor to create forward computational models with the necessary accuracy required for EIT recon-struction, but these eorts were not successful in clinical environment. This is the main reason why we consider frequency-dierence EIT (fdEIT) where we take advantage of frequency dependance of biological tissue by injecting currents with at least two dierent frequencies. In this article, we review recent progress in fdEIT