Scalp-recorded EEG localization in MRI volume data

被引:35
|
作者
Brinkmann, BH
O'Brien, TJ
Dresner, MA
Lagerlund, TD
Sharbrough, W
Robb, RA
机构
[1] Mayo Clin & Mayo Fdn, Biomed Imaging Resource, Rochester, MN 55905 USA
[2] Mayo Clin & Mayo Fdn, Dept Neurol, Rochester, MN 55905 USA
[3] Mayo Clin & Mayo Fdn, MRI Res Lab, Rochester, MN 55905 USA
关键词
electroencephalography (EEG); registration; magnetic resonance imaging (MRI); focal epilepsy;
D O I
10.1023/A:1022266822252
中图分类号
R74 [神经病学与精神病学];
学科分类号
摘要
Scalp-recorded EEG is a noninvasive and widely available tool for studying normal and dysfunctional human neurophysiology with unsurpassed temporal resolution, However, scalp-recorded EEG data is difficult to correlate with anatomy, and most current display and neural source estimation algorithms are based on unrealistic spherical or elliptical models of the head. It is possible to measure the positions of electrodes on the patient's scalp, and to register those electrode positions into the space of a high-resolution MRI volume, and to then use the patient-specific anatomy as the basis for display and estimation of neural sources. We use a surface matching algorithm to register digitized electrode and scalp surface coordinates to a three-dimensional MRI volume. This study uses fiducial markers in phantom and volunteer studies to quantitatively estimate the accuracy of the electrode registration method. Our electrode registration procedure is accurate to 2.21 mm for a realistic head phantom and accurate to 4.16 mm on average for five volunteers. This level of accuracy is considered within acceptable limits for clinical applications.
引用
收藏
页码:245 / 253
页数:9
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