机能影象正电子发射CT(PET)所提供的脑局部循环代谢量与该部脑组织的活动状态相平行,故可用其作为研究包括小脑的脑局部活动的手段。 脑组织活动与脑循环代谢 在生理情况下,脑局部的代谢量和血流量随脑组织的活动状态而改变。因此,平均单位脑组织的循环代谢量反映该部脑的活动状态。PET相当于自体放射显影,对人体脑血流代射量可进行立体测定、颇适用于研究脑的局 Functional imaging positron emission tomography (PET) provides a local circulation of brain metabolism parallel to the activity of the brain tissue, so it can be used as a means to study the cerebellar brain activity. Brain Tissue Activity and Cerebral Circulation Metabolism In physiological conditions, the amount of brain metabolism and blood flow varies with the activity of brain tissue. Therefore, the average unit of brain tissue circulating metabolism reflects the Department of brain activity. PET is equivalent to autoradiography, on the human body cerebral blood flow volume can be measured three-dimensional, quite suitable for the study of the brain Bureau