Simple Method for Improving the Sensitivity of Functional Near-Infrared Spectroscopy

在使用近红外分光法的脑功能测定中，为了提高测定精度，分离测定信号中包含的皮肤血流的影响是重要的。 研究了一种简单的方法，利用两种抵消信号抵消皮肤血流。 首先，通过仿真和体模实验验证了所提出的校正方法的有效性。此外，我们还提出了照射光的调制和接收信号的解调方法，构建了生物信号测量系统。 在生物功能信号测量中，确认了可以通过使用校正信号来检测包括在测量信号中的扰动。

In the brain function measurement using near-infrared spectroscopy, it is important to separate the effects of skin blood flow contained in the measurement signal for improving measurement accuracy. We research on a simple method to cancel the skin blood flow by using two kinds of cancellation signal. First of all, the validity of the proposed correction method was confirmed by simulation and phantom experiment. Furthermore, we propose the way of the modulation of irradiating light and the demodulation of receiving signals, to construct the system of the biological signal measurement. In the biological function signal measurement, it was confirmed that the disturbance included in the measurement signal can be detected by using the correction signal.