The ACE1 Thoracic Electrical Impedance Tomography System for Ventilation and Perfusion
Format of Original
Institute of Electrical and Electronics Engineers (IEEE)
2015 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)
Electrical Impedance Tomography (EIT) is a technique which can image the varying electrical properties of biological tissues. For clinical use of EIT, it can be advantageous to know both tissue conductivity and permittivity. Presented is the hardware design for the pairwise current injection active complex electrode (ACE1) EIT system which measures phasic voltages for conductivity and permittivity image reconstruction. In this system, alternating current is injected on electrodes on the boundary of a domain and single-ended voltage measurements are used in image reconstructions of the domain's interior and in calculating the current applied at the electrodes.