Koessler L, Maillard L, Benhadid A, Vignal J-P, Braun M, Vespignani H
Inserm ERI13, University Henri Poincaré, 54000 Nancy, France.
Neurophysiol Clin. 2007 Apr-May;37(2):97-102. doi: 10.1016/j.neucli.2007.03.002. Epub 2007 Apr 3.
An important goal for EEG-based functional brain studies is to estimate the location of brain sources that produce the scalp-recorded signals. Such source localization requires locating precisely the position of the EEG sensors. This review describes and compares different methods that are used for localizing EEG sensors.
Five different methods have been described in literature. Manual methods consist in manual measurements to calculate the 3D coordinates of the sensors. Electromagnetic and ultrasound digitization permit localization by using trade devices. The photogrammetry system consists in taking pictures of the patient's head with the sensors. The last method consists in directly localizing the EEG sensors in the MRI volume.
The spatial localization of EEG sensors is an important step in performing source localization. This method should be accurate, fast, reproducible, and cheap. Currently, electromagnetic digitization is the most currently used method but MRI localization could be an interesting way because no additional method or device needs to be used to locate the EEG sensors.
基于脑电图的功能性脑研究的一个重要目标是估计产生头皮记录信号的脑源位置。这种源定位需要精确确定脑电图传感器的位置。本综述描述并比较了用于定位脑电图传感器的不同方法。
文献中描述了五种不同的方法。手动方法包括通过手动测量来计算传感器的三维坐标。电磁和超声数字化允许使用商业设备进行定位。摄影测量系统包括用传感器拍摄患者头部的照片。最后一种方法是直接在磁共振成像容积中定位脑电图传感器。
脑电图传感器的空间定位是进行源定位的重要一步。该方法应准确、快速、可重复且成本低廉。目前，电磁数字化是最常用的方法，但磁共振成像定位可能是一种有趣的方式，因为无需使用额外的方法或设备来定位脑电图传感器。
