Electromagnetic Modeling of Rat’s Head: Comparison of Formulations and Models

Abstract

Reliable inverse imaging of source currents in rat's brain requires sufficiently accurate and CPU-time moderate forward models of fields to calibrate inverse solvers. In this paper, we compare different mathematical formulations of the electromagnetic problem related to the analysis of brain waves (static, quasi-static, full-wave) and various meshes differing in the density, the type and the geometrical accuracy. A sufficiently accurate model of brain waves is then completed by the cerebrospinal fluid and the skull. The resultant composite model of rat's head with properly set electrical parameters has to be calibrated by the outputs of measurements. That way, a realistic electromagnetic model of the head of a live rat can be obtained. Keywords Forward brain model, rat's head, numerical analysis, Maxwell equations Vlastimil KOUDELKA was born in Usti nad Labem on April 1985. He received the M.Sc. and Ph.D. from Brno University of Technology, Brno, Czech Republic, in 2009 and 2014, respectively. He is currently a junior researcher at the National Institute of Mental Health in Klecany. Dr. Koudelka is involved in multimodal neuro-imaging techniques in human and EEG pre-clinical research in rats.