Burgess Richard C
Epilepsy Center, Neurological Institute, The Cleveland Clinic Foundation, 9500 Euclid Avenue, Cleveland, OH 44195, USA.
Neuroimaging Clin N Am. 2020 May;30(2):145-158. doi: 10.1016/j.nic.2020.02.004.
Magnetoencephalography is the noninvasive measurement of miniscule magnetic fields produced by brain electrical currents, and is used most fruitfully to evaluate epilepsy patients. While other modalities infer brain function indirectly by measuring changes in blood flow, metabolism, and oxygenation, magnetoencephalography measures neuronal and synaptic function directly with submillisecond temporal resolution. The brain's magnetic field is recorded by neuromagnetometers surrounding the head in a helmet-shaped sensor array. Because magnetic signals are not distorted by anatomy, magnetoencephalography allows for a more accurate measurement and localization of brain activities than electroencephalography. Magnetoencephalography has become an indispensable part of the armamentarium at epilepsy centers.
脑磁图是对脑电流产生的微小磁场进行的无创测量，在评估癫痫患者方面应用最为有效。其他方式通过测量血流、代谢和氧合作用的变化来间接推断脑功能，而脑磁图则以亚毫秒级的时间分辨率直接测量神经元和突触功能。大脑的磁场由头盔形状的传感器阵列中环绕头部的神经磁强计记录。由于磁信号不会因解剖结构而失真，与脑电图相比，脑磁图能够更准确地测量和定位脑活动。脑磁图已成为癫痫中心不可或缺的检查手段。
