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术前明确复杂性局部发作（ＣＰＳ）病因及准确定位致癫痫灶对手术实施非常重要。近代四大无创性影像技术对ＣＰＳ显示出了各自的优势：ＸＣＴ及ＭＲＩ可良好地显示病灶形态结构改变，但对微小的结构或功能异常可被疏漏，其探测灵敏度分别为＜３０％及４０～５０％；ＰＥＴ及ＳＰＥＣＴ可良好显示病灶的生理、生化、代谢异常，ＣＰＳ的发作间期癫痫灶血流减少，代谢降低，其探测灵敏度为６０％～７０％，而发作期癫痫区血流增加，代谢增加，其探测灵敏度可达９２％～１００％。
Preoperative clear complexity of the cause of stroke (CPS) and accurate positioning of epileptic foci for the implementation of surgery is very important. The four noninvasive imaging techniques in modern times showed their own advantages for CPS: XCT and MRI can show the morphological changes of the lesion well, but they can be neglected for small structures or dysfunctions with detection sensitivity of <30% and 40% respectively ~ 50%; PET and SPECT can well show the physiological, biochemical and metabolic abnormalities of the lesion. The blood flow of epileptic foci of CPS is reduced and the metabolism is decreased. The detection sensitivity is 60% -70%, while the blood flow of epilepsy Increased, increased metabolism, the detection sensitivity of up to 92% to 100%.