De Reuck J, Leys D, De Keyser J
Department of Neurology, University Hospital of Gent (Belgium).
Acta Neurol Belg. 1997 Sep;97(3):168-71.
Positron emission tomography (PET) has been widely used in the study of stroke and related cerebrovascular diseases. It has shown the various stages leading to cerebral infarction and defined the significance of the ischaemic penumbra. PET scan can predict the clinical outcome of patients with acute ischaemic stroke. Several types of diaschisis can also be demonstrated by PET. They reflect different pathophysiological changes in supratentorial infarcts. Post-apoplectic seizures are shown to increase the ischaemic damage in the affected cerebral hemisphere. PET has contributed also to the concept of multi-infarct dementia, although the significance of chronic ischaemia in the pathogenesis of vascular dementia has not been fully investigated.
正电子发射断层扫描（PET）已广泛应用于中风及相关脑血管疾病的研究。它展示了导致脑梗死的各个阶段，并明确了缺血半暗带的意义。PET扫描能够预测急性缺血性中风患者的临床预后。PET还可显示几种不同类型的交叉性小脑失联络。它们反映了幕上梗死不同的病理生理变化。中风后癫痫发作会加重患侧大脑半球的缺血损伤。PET也有助于多梗死性痴呆概念的形成，尽管血管性痴呆发病机制中慢性缺血的意义尚未得到充分研究。
