Electrical Bioimpedance Cerebral Monitoring. A Study of the Current Density Distribution and Impedance Sensitivity Maps on a 3D Realistic Head Model
Paper i proceeding, 2007

There have been several studies of the application of electrical bioimpedance technology for brain monitoring in the past years. They have targeted a variety of events and injuries e.g. epilepsy or stroke. The current density distribution and the voltage lead field associated with an impedance measurement setup is of critical importance for the proper analysis of any dynamics in the impedance measurement or for an accurate reconstruction of an EIT image, specially a dynamic type. In this work for the first time, the current density distribution is calculated in a human head with anatomical accuracy and resolution down to 1 mm, containing up to 24 tissues and considering the frequency dependency of the conductivity of each tissue. The obtained current densities and the subsequent sensitivity maps are analyzed with a special focus on the dependency of the electrode arrangement and also the measurement frequency. The obtained results provide us with interesting and relevant information to consider in the design of any tool for electrical bioimpedance cerebral monitoring.

Författare

Fernando Seoane Martinez

Signaler och system, Signalbehandling och medicinsk teknik, Medicinska signaler och system

Mai Lu

Bioeffekter

Mikael Persson

Bioeffekter

Kaj Lindecrantz

Signaler och system, Signalbehandling och medicinsk teknik, Medicinska signaler och system

Proceedings of the 3rd IEEE-EMBS International Conference on Neural Engineering

256 - 260

Ämneskategorier

Medicinsk laboratorie- och mätteknik

ISBN

1-4244-0792-3