Dense Array EEG Neuroimaging

Patient friendly procedure

For patients suffering from focal epilepsy that cannot be controlled by medication, surgery to resect the epileptic zone can offer relief from symptoms, resulting in a higher quality of life. A comprehensive presurgical evaluation is critical to a positive surgical outcome.

Dense array EEG (dEEG) with 128 or 256 electrodes is attracting interest as an important tool for use in epilepsy presurgical planning. Recent large-scale studies indicate that dEEG compares favorably to other noninvasive methods, such as conventional EEG, PET (positron emission tomography), ictal SPECT (single-photon emission computed tomography), and MRI (magnetic resonance imaging), for identifying the irritative zone in focal epilepsy (see for example Brodbeck et al (2011). Used with specialized software, such as GeoSource 2.0, dEEG data can be used for visualization of human brain function.

Brodbeck, V., Spinelli, L., Lascano, A., Wissmeier, M., Vargas, M., Vulliemoz, S., Pollo, C., Schaller, K., Michel, C., and Seeck, M.I. (2011). Electroencephalographic source imaging: a prospective study of 152 operated epileptic patients. Brain 134 (10). 2887-2897.;doi:10.1093/brain/awr243.

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