Title :
Performance of the electroencephalography inverse problem using electric potential gradient measurements
Author :
von Ellenrieder, N. ; Muravchik, C. ; Spinelli, E. ; Nehorai, A. ; Roitman, J. ; Silva, W. ; Kochen, S.
Author_Institution :
Univ. Nacional de La Plata, Argentina
Abstract :
The EEG inverse problem is traditionally solved with measurements from an array of electric potential sensors. In this work we analyze the expected performance if electric potential gradient measurements were used to solve the inverse problem. We use the Cramer-Rao bound (CRB) to analyze and compare the performance of the two cases. The spatial covariance of the noise is estimated from real EEG measurements.
Keywords :
bioelectric potentials; biomedical measurement; biosensors; electroencephalography; inverse problems; physiological models; Cramer-Rao bound; EEG; electric potential gradient measurements; electric potential sensors; electroencephalography; inverse problem; spatial covariance; Brain modeling; Electric potential; Electric variables measurement; Electrodes; Electroencephalography; Inverse problems; Magnetic sensors; Noise measurement; Performance analysis; Sensor arrays;
Conference_Titel :
Engineering in Medicine and Biology Society, 2003. Proceedings of the 25th Annual International Conference of the IEEE
Print_ISBN :
0-7803-7789-3
DOI :
10.1109/IEMBS.2003.1280503
