论文部分内容阅读
这是脑功能磁共振成像（ｆＭＲＩ）的一篇综述文章。广泛使用的血氧水平依赖性磁共振功能成像（ＢＯＬＤｆＭＲＩ）技术在不需要射线或对比照影剂或者放射性同位素示踪的情况下，可以观测大脑皮层血流中合氧和去氧血红蛋白的很小浓度变化，这个浓度变化间接地放映了脑神经的活动程度。ｆＭＲＩ分空间分辨率在毫米量级而时间分辨率在秒的量级。神经科学家可以使用这些成像技术可以无创伤地得到脑激活地图分布和试验他们关于脑功能机制的各种假说。
This is a review of brain functional magnetic resonance imaging (fMRI). The widely used BOLD fMRI technique allows the observation of very small amounts of oxygen and deoxyhemoglobin in the cerebral cortex bloodstream without the need for radiographic or contrast-based imaging or radioisotope tracing Concentration changes, this concentration change indirectly shows the degree of activity of the brain. The fMRI sub-spatial resolution is on the order of millimeters and the temporal resolution is on the order of seconds. Neuroscientists can use these imaging techniques to gain brain activation mapping distributions and test their various hypotheses about brain function mechanisms at a minimum.