A method which is accurate and yet relatively simple, rapid and inexpensive for estimating 3-D coordinates of EEG (electroencephalograph) electrode positions on the head. The electrode positions of any number of scalp electrodes placed according to the standard 10/10 electrode position ...http://www.google.de/patents/US5817029?utm_source=gb-gplus-sharePatent US5817029 - Spatial measurement of EEG electrodes
