title: The ACE1 thoracic Electrical Impedance Tomography system for ventilation and perfusion.
abstract: 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.
authors.forename: Michelle M
authors.initials: MM
authors.lastname: Mellenthin
authors.forename: Jennifer L
authors.initials: JL
authors.lastname: Mueller
authors.forename: Erick Dario León
authors.initials: ED
authors.lastname: Bueno de Camargo
authors.forename: Fernando
authors.initials: F
authors.lastname: Silva de Moura
authors.forename: Sarah J
authors.initials: SJ
authors.lastname: Hamilton
authors.forename: Raul
authors.initials: R
authors.lastname: Gonzalez Lima
mesh_terms: D002648:Child; D004553:Electric Conductivity; D017097:Electric Impedance; D004566:Electrodes; D004867:Equipment Design; D006801:Humans; D007090:Image Interpretation, Computer-Assisted; D010477:Perfusion; D056152:Respiratory Rate; D059629:Signal-To-Noise Ratio; D014054:Tomography / Q000295:instrumentation* / Q000379:methods