Abstract: ObjectiveTo study the values of EEG and [18F]2-deoxyglucose(FDG) positron emission tomography in localizing the epiletogenic cortex,and evaluate their relation.MethodsVideo-EEG(VEEG) and FDG-PET scans were performed in 44 patients with refractory epilepsy.Electrocorticography(ECoG) in surgery and patholopy were performed in 38 patients who had undergone neurosurgical therapy.Congruence among them were studied.Results43 patients(98%) had FDG-PET hypometabolism.42 patients(95%) had epileptiform wave.There were 22 patients(50%) whose PET and EEG were in complete congruence,whereas 10 patients(23%) in part congruence.12 patients who had undergone operation had controversial results in PET and EEG,8 cases had agreement between ECoG and PET,and 2 cases had agreement between ECoG and VEEG. ConclusionFDG-PET is a effective,sensitive and non-invasive investigation.It can provide valuable supplemental data in patients with unlocalized surface EEG.

Key words: positron emission tomography(PET), Video-EEG, epilepsy, neurosurgery