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

Fernando Seoane (Institutionen för signaler och system, Medicinska signaler och system) ; Mai Lu (Institutionen för signaler och system, Bioeffekter) ; Mikael Persson (Institutionen för signaler och system, Bioeffekter) ; Kaj Lindecrantz (Institutionen för signaler och system, Medicinska signaler och system)
Proceedings of the 3rd IEEE-EMBS International Conference on Neural Engineering p. 256 - 260. (2007)
[Konferensbidrag, refereegranskat]

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.



Denna post skapades 2007-12-20.
CPL Pubid: 63623

 

Institutioner (Chalmers)

Institutionen för signaler och system, Medicinska signaler och system
Institutionen för signaler och system, Bioeffekter (2005-2010)

Ämnesområden

Medicinsk teknik

Chalmers infrastruktur