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Improved separability of dipole sources by tripolar versus conventional disk electrodes: A modeling study using independent component analysis

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4 Author(s)
Cao, H. ; BME, Louisiana Tech Univ., Ruston, LA ; Besio, W. ; Jones, S. ; Medvedev, A.

Tripolar electrodes have been shown to have less mutual information and higher spatial resolution than disc electrodes. In this work, a four-layer anisotropic concentric spherical head computer model was programmed, then four configurations of time-varying dipole signals were used to generate the scalp surface signals that would be obtained with tripolar and disc electrodes. Finally, a fast fixed-point algorithm was used for signal independent component analysis (ICA). The results show that signals from tripolar electrodes generated better ICA separation results than from disc electrodes.

Published in:

Bioengineering Conference, 2009 IEEE 35th Annual Northeast

Date of Conference:

3-5 April 2009