Beamforming applied to surface EEG improves ripple visibility

Epilepsy surgery is a treatment option that can be considered in patients with refractory focal epilepsy. Presurgical identification of the epileptogenic zone, defined as the minimum area of cortex that has to be resected to achieve seizure freedom (Lüders et al., 2006), is essential for a good surgery outcome. Currently 52% to 62% of patients are reported to be seizure free five years after surgery (de Tisi et al., 2011; Hauptman et al., 2012; Jobst and Cascino 2015), suggesting limitations in the presurgical identification of the epileptogenic zone.

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