Abstract：Hemodynamics has always been an important method of studying the brain. In recent years, functional near-infrared
spectroscopy (fNIRS) has been utilized for examining functional brain activity by measuring the changes in the concentrations of
oxygenated hemoglobin and deoxyhemoglobin. fNIRS is a noninvasive detection technology. It has many characteristics, such as
fast measurement speed, simple operation, and good compromise in both spatial and temporal resolution. Thus, it has been widely
used in various studies. However, recent fNIRS is still non-wearable and non-portable, and the the experimenter is not free to move
during the experiment. In this work, we designed a low-cost, low power, wearable and wireless fNIRS system. This system detected
the changes of brain activity by measuring the concentration of oxygenated hemoglobin and deoxyhemoglobin in the blood using
two different wavelengths of near-infrared light (760 nm and 850 nm). Meanwhile, we designed a plastic housing for the optical fiber
by 3D printing technology. The system can work continuously for several hours under the lithium battery power supply. The results
showed that the system can effectively detect the concentration changes of oxygenated hemoglobin and deoxyhemoglobin and can
reflect the activity of the brain.
陈娇. 一种基于近红外光谱成像的可穿戴式设备的设计[J]. 中国医疗设备, 2018, 33(12): 46-49.
CHEN Jiao. Design of a Wearable Device Based on Near Infrared Spectrum Imaging. China Medical Devices, 2018, 33(12): 46-49.
