目的 :用皮层脑电(Electroencephalography,ECOG)评估 PET对致痫灶定位诊断的准确性。方法 :36例经CT和MR检查除外脑部肿瘤及脑血管畸形的癫痫病人 ,经正电子发射断层扫描(Positronemissiontomography,PET)检查定位后 ,进行颅骨钻孔 ,放置条状电极片 ,然后进行ECOG描记 ,评估PET对致痫灶定位诊断的准确性。结果 :PET对致痫灶定位诊断的准确率为93 %。结论 :PET是目前准确率较高的无创性致痫灶定位诊断方法 OBJECTIVE: To evaluate the accuracy of PET in detecting the location of focal epileptogenic lesions by Electroencephalography (ECOG). Methods: Thirty-six patients with epilepsy except brain tumors and cerebrovascular malformations were examined by CT and MR. After positron emission tomography (PET) examination and localization, skull holes were drilled, strip electrode strips were placed, and ECOG Tracing and assessing the accuracy of PET in the diagnosis of the location of the epileptogenic focus. Results: The diagnostic accuracy of PET on the location of the epileptogenic zone was 93%. Conclusion: PET is the most accurate noninvasive localization method for the localization of focal epilepsy