title: Spatial dependence of the phase in localized bioelectrical impedance analysis.
abstract: The variety of phase functions, theta(z) = arctan X(z)/R(z), observed earlier on the thighs of healthy and seriously ill subjects via localized bioelectrical impedance analysis, can be represented by a model which combines realistic thigh shapes with homogeneous, axially symmetric conductivity tensors. While quantitative results depend sensitively on the way current is injected, it appears to be generally true that d theta/d(z) < 0 whenever phi(r) > phi(z) (and vice versa), where phi(r) and phi(z) are the phases of the radial and longitudinal conductivity components.
authors.affiliation: Department of Physics, Northeastern University, Boston, MA 02115, USA.
authors.forename: C A
authors.initials: CA
authors.lastname: Shiffman
authors.forename: R
authors.initials: R
authors.lastname: Aaron
authors.forename: A
authors.initials: A
authors.lastname: Altman
mesh_terms: D000328:Adult; D001823:Body Composition; D017097:Electric Impedance; D006801:Humans; D015233:Models, Statistical; D008962:Models, Theoretical; D012984:Software