Projecte realitzat en col.laboració amb el centre University of Borås

Research results from several investigations worldwide suggest that Measurements of Electrical Bioimpedance of the brain might be useful to monitor the health of the brain. The path selected by the electrical current injected to perform the Bioimpedance measurements is an important factor to evaluate the applicability of any bioimpedance-based method for brain monitoring. The pathways and its impact in the bioimpedance measurement can be studied through the current density distributions and the voltage lead field associated with and impedance measurement. In this work, the current density distribution and the impedance sensitivity maps for several frequencies and arrangements of electrode have been calculated and analyzed with Matlab®. The obtained results have been analyzed with a special focus on the dependency of the electrode arrangements as well as the measurement frequency. The obtained results provide us with interesting and relevant information supporting that there is a strong dependency between the measured bioimpedance and the arrangement of electrode as well as the frequency that should be considered when evaluating the implementation of Electrical Bioimpedance Cerebral Monitoring systems as a tool for diagnosis support. The results suggest that further investigations must be done in order to reach a higer level of understanding