中文摘要：

随着影像技术的不断发展，出现了正电子发射断层显像（PET）／磁共振成像（MRI），其将解剖和功能成像有机地结合起来，使显像更加清楚。作为一种无创的检查手段，PET／MRI在癫痫发病机制、诊断以及术前评估过程中发挥着重要的作用。本文主要介绍PET／MR／的相关概念以及与其他影像学方法的比较，并叙述PET／MRI在难治性癫痫术前评估中的应用。

英文摘要：

Epilepsy is a common disease in central nervous system; most patients with epilepsy ai%r regular anti-epilepsy drug treatment can be controlled, but drug treatment in about 20%-30% of patients is invalid, known as refractory epilepsy. With the development of imaging techniques, PET/MRI emerge and they combine anatomical and functional imaging, which makes the imaging more clear, enjoying more accurate anatomical structure. Thus, PET/MRI play important roles in the process of pathogenesis, diagnosis and preoperative assessment of epilepsy. We mainly introduce the concepts of PET/MRI and the comparison with other imaging technology, and describe the application of PET/MRI in preoperative assessment of refractory epilepsy.