sentence: For patients with medically refractory epilepsy , resective surgery is the best treatment to gain seizure freedom.1 To be successful , epilepsy surgery requires the presurgical delineation of the epileptogenic zone ( EZ ) , that is , the brain area indispensable for generating seizures.2 High ‐ frequency oscillations ( HFOs ; ripples : >80 Hz ; fast ‐ ripples : > 250 Hz ) are promising interictal biomarkers of the EZ ,3 , 4 , 5 , 6 independently of conventional interictal spikes.7 , 8, 9 Due to their low amplitude , HFOs are typically investigated using intracranial Electroencephalography ( icEEG ) .