Selection of Reference Channels Based on Mutual Information for Frequency-Dependent Subtraction Method Applied to Fetal Biomagnetic Signals.
Selection of Reference Channels Based on Mutual Information for Frequency-Dependent Subtraction Method Applied to Fetal Biomagnetic Signals.
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DOI：
10.1109/tbme.2016.2591443
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发表时间：
2017-05
期刊：
影响因子：
--
通讯作者：
Eswaran H
中科院分区：
文献类型：
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作者：
Escalona-Vargas D;Siegel ER;Murphy P;Lowery CL;Eswaran H
Fetal magnetoencephalography (fMEG) recordings are measured in the presence of maternal (mMCG) and fetal (fMCG) magnetocardiograms, and other biological and environmental interferences. MCG interferences can be attenuated by the frequency dependent subtraction (SUBTR) method which uses a set of reference channels and performs subtraction of interference in the frequency domain. We propose a method that uses minimal redundancy and maximal relevance (mRMR) based on mutual information (MI) as criteria to automatically select references. We measured the performance of SUBTR at removing mMCG and fMCG signals in two steps for different number of references in 38 real datasets. The evaluation was based on MCG amplitude reduction. We compared the performance of the mRMR approach with random selection of references. Significant differences in interference removal were found when a distinct number of references were chosen by mRMR compared to random selection. mRMR provides an effective tool to automatically select a set of featured references.
