title: A finite element model of needle electrode spatial sensitivity.
abstract: We used the finite element (FE) method to estimate the spatial sensitivity of a needle electrode for bioimpedance measurements. This current conducting needle with an insulated shaft was inserted in a saline solution and the current was measured at the neutral electrode. Model resistance and reactance were calculated and successfully compared with measurements on a laboratory model. The sensitivity field was described graphically based on these FE simulations.
authors.affiliation: Department of Physics, University of Oslo, Norway. per@hoyum.net
authors.forename: P
authors.initials: P
authors.lastname: Høyum
authors.forename: H
authors.initials: H
authors.lastname: Kalvøy
authors.forename: Ø G
authors.initials: ØG
authors.lastname: Martinsen
authors.forename: S
authors.initials: S
authors.lastname: Grimnes
mesh_terms: D004553:Electric Conductivity; D004566:Electrodes; D020342:Finite Element Analysis; D008954:Models, Biological; D009339:Needles