Papers Published

1. Plonsey, R. and Collin, R., Electrode guarding in electrical impedance measurements of physiological systems-a critique, Med. Biol. Eng. Comput. (UK), vol. 15 no. 5 , pp. 519 - 27 .
   (last updated on 2007/04/16)

   Abstract:
   The application of the guard ring has been advanced as a method for focusing the applied current in performing electrical-impedance measurements of volume conductors. The objective is to obtain impedance and/or its variation at localised regions of heterogeneous tissue. The paper discusses the capabilities of limitations of both guarded and unguarded measurements and show that the application of guarding does not, normally, fulfil the capabilities being ascribed to it

   Keywords:
   biomedical measurement;electric impedance measurement;