A finite element model of needle electrode spatial sensitivity.
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.
Høyum
P
P
Department of Physics, University of Oslo, Norway. per@hoyum.net
Kalvøy
H
H
Martinsen
Ø G
ØG
Grimnes
S
S
D004553:Electric Conductivity; D004566:Electrodes; D020342:Finite Element Analysis; D008954:Models, Biological; D009339:Needles