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  • Title: A six-ring probe for monitoring conductivity changes.
    Author: Wtorek J, Bujnowski A, Polinski A, Nowakowski A.
    Journal: Physiol Meas; 2005 Apr; 26(2):S69-79. PubMed ID: 15798248.
    Abstract:
    This paper presents the construction of a six-ring probe for monitoring immittance changes. The spatial sensitivity of the probe is defined. This is used to examine the uniqueness of the probe in terms of its application to monitoring conductivity changes. A spatial distribution of the sensitivity is presented for isotropic and anisotropic cases. The latter case is restricted only to anisotropy met when measuring muscles, i.e. diagonal anisotropy. Theoretical calculations performed using the finite element method were verified experimentally using a specially developed measuring system. An example of in vivo measurements is included.
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