Activation detection in fNIRS by wavelet coherence

	Activation detection in fNIRS by wavelet coherence
	Zhang, Xin; Niu, Haijing; Song, Yan; Fan, Yong; Tianzi Jiang
	2012
会议名称	MEDICAL IMAGING 2012: BIOMEDICAL APPLICATIONS IN MOLECULAR, STRUCTURAL, AND FUNCTIONAL IMAGING
会议录名称	SPIE Medical Imaging
会议日期	2012
会议地点	San Diego
摘要	Functional near infrared spectroscopy (fNIRS) is an optical technique measuring hemoglobin oxygenation and deoxygenation concentrations of brain cortex with higher temporal resolution than current alternative techniques. The high temporal resolution enables collecting abundant brain functional information. However, the information measured is correlated and mixed with a variety of physiological signals. Due to the mixture effect, activation detection is one of challenges of analyzing functional activity in fNIRS. To achieve a better detection of activated area from the complicated information, the paper presents a multi-scale analysis method based on the cross wavelet coherence. In the method, the paradigm of an experiment is used as the reference signal. The coherence of the signal with data measured by fNIRS at each channel is calculated. Then the coherence power is summated to evaluate the activation level. Experiments on simulated and real data demonstrate that the method is efficient to detect activated area covered by the fNIRS probe.
关键词	Fnirs
收录类别	SCI
文献类型	会议论文
条目标识符	http://ir.ia.ac.cn/handle/173211/5275
专题	脑图谱与类脑智能实验室_脑网络组研究
通讯作者	Tianzi Jiang
推荐引用方式 GB/T 7714	Zhang, Xin,Niu, Haijing,Song, Yan,et al. Activation detection in fNIRS by wavelet coherence[C],2012.

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