An inhomogeneous head model applied to dipole tracing in the brain is described. Inhomogeneities and real geometry of the head can be taken into account in the present model with the aid of the boundary element method. The transfer matrix connecting the potentials in the presence of inhomogeneities with that in an infinite medium is calculated in advance, and the potentials on the scalp can be evaluated rapidly for an arbitrary given dipole in the brain. Simulation results obtained in a two-dimensional situation show that inhomogeneities as well as real geometry of the head should be involved in the calculation of potentials on the scalp to get more precise inverse dipole solution.
|Original language||English (US)|
|Number of pages||2|
|State||Published - 1987|