This paper surveys some of the work our group has done in electrical impedance tomography.

Electrical impedance tomography (EIT) is a technology developed to image the electrical conductivity distribution of a conductive medium. The technology is of interest because of its low cost and also because the measurement of the electrical conductivity brings direct information about the composition of the conductive medium. Because the ground is conductive to a certain extent, the technolog...

Employment of technical equipment and devices increased intensely in anaesthesiology and intensive care medicine respectively during the last decades. Regarding mechanical ventilation, which is of outstanding clinical value up to date, lots of modes, parameters and features have been developed and technically implemented in modern respirators [1]. Although the ARDS network encouraged scientific...

Electrical impedance tomography extends to the new and new areas of the medical diagnostics: lungs, breast, prostate, etc. The feedback from the doctors who use our breast EIT diagnostic system has induced us to develop the 3D electrical impedance imaging device for diagnostics of the cervix of the uterus gynecologic impedance tomograph (GIT). The device uses the same measuring approach as the ...

INTRODUCTION Traditional Chinese medicine offers several theories to explain the mechanism of acupuncture. One of these theories proposes that acupuncture points and meridians have unique electrical properties and their electrical skin impedance is lower than surrounding areas. The aim of this study was to evaluate the differences in electrical skin impedance between PC4 and the pericardium mer...

A HIGH-RESOLUTION MICROSCOPIC ELECTRICAL IMPEDANCE IMAGING MODALITY: SCANNING IMPEDANCE IMAGING Hongze Liu Department of Electrical and Computer Engineering Doctor of Philosophy Electrical impedance imaging is an imaging technique which has the capability of revealing the spatial distribution of the electrical impedance inside biological tissues. Classical electrical impedance imaging including...

OBJECTIVES The purpose of our study was to estimate skin structure and conductivity distribution in a cross section of local tissue using non-invasive measurement of impedance data. The present study was designed to evaluate the efficiency of skin depth information through computer simulations. The multilayer tissue model was composed of epidermis, dermis tissues, and subcutaneous. METHODS In...

OBJECTIVES A system is being developed for measurement of biologic active points (BAPs) in humans using a modified dry electrode. The BAPs measuring system analyzed the electrical characteristics and searched for the position of BAPs using modified dry electrodes. SUBJECTS Skin electrical resistance at BAPs and non-BAPs was examined with a modified electrode system for healthy male subjects (...

—We analyze the structure of the general solution of the two-dimensional electrical impedance equation in analytic form using Taylor series in formal powers, for the case when the conductivity is a separable-variables function only once derivable, using a quaternionic reformulation that leads us to a special kind of Vekua equation. Finally, we broach its applications in the eld of electrical im...

Piezoelectric transducer (PZT) patches can be attached to structures in order to reduce vibration. The PZT patches essentially convert vibrational mechanical energy to electrical energy. The electrical energy can be dissipated via an electrical impedance. This paper introduces a method of implementing an arbitrary impedance using a current source and digital signal processor (DSP). The \synthet...