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  • Title: A study of composite electrode-tissue impedance.
    Author: Robinson RL, Davidson JL, Wright P, Pomfrett CJ, McCann H.
    Journal: Annu Int Conf IEEE Eng Med Biol Soc; 2008; 2008():1171-4. PubMed ID: 19162873.
    Abstract:
    Electrical impedance tomography has been used in the medical environment for many years. Recently it has been used for brain function imaging. This type of technology uses a large number of electrodes on the scalp, examples in the literature ranging from 8 to 64. In this paper, the composite impedance of the electrode in contact with tissue is investigated. An experimental method has been developed to enable the use of a commercial impedance analyzer in compliance with medical safety standards. The magnitude and long-term stability of the composite impedance of the electrode-tissue system is found to be greatly dependent on the type of electrodes used.
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