Electrical Impedance Tomography of Epilepsy

EIT comprises of a box of electronics similar in size to a video recorder, laptop computer and leads which link typically to 16 or 32 external ECG-like electrodes placed around the subject. Images are generated by applying tiny electrical signals through some electrodes and recording the resulting signals at others. The signals applied are completely safe, within established British and EU safety limits and cannot be felt. For intracranial electrode studies, the EIT systems will be linked to the existing EEG video recording systems and EIT will be recorded at the same time using some or all of the available intracranial electrodes.