McCubbin J, Robinson S E, Cropp R, Moiseev A, Vrba J, Murphy P, Preissl H, Eswaran H
Department of Obstetrics and Gynecology, University of Arkansas for Medical Sciences, Little Rock 72205, USA.
IEEE Trans Biomed Eng. 2006 Aug;53(8):1720-4. doi: 10.1109/TBME.2006.876619.
Recording fetal magnetoencephalographic (fMEG) signals in-utero is a demanding task due to biological interference, especially maternal and fetal magnetocardiographic (MCG) signals. A method based on orthogonal projection of MCG signal space vectors (OP) was evaluated and compared with independent component analysis (ICA). The evaluation was based on MCG amplitude reduction and signal-to-noise ratio of fetal brain signals using exemplary datasets recorded during ongoing studies related to auditory evoked fields. The results indicate that the OP method is the preferable approach for attenuation of MCG and for preserving the fetal brain signals in fMEG recordings.
由于生物干扰，尤其是母体和胎儿的心磁图（MCG）信号，在子宫内记录胎儿脑磁图（fMEG）信号是一项艰巨的任务。评估了一种基于MCG信号空间向量正交投影（OP）的方法，并将其与独立成分分析（ICA）进行了比较。该评估基于使用正在进行的与听觉诱发电场相关研究中记录的示例性数据集的MCG幅度降低和胎儿脑信号的信噪比。结果表明，OP方法是在fMEG记录中衰减MCG和保留胎儿脑信号的优选方法。
