Physics Graduate Student Seminar with Weihao Fan on Frequency domain high-density diffuse optical tomography for human brain mapping

Functional near-infrared spectroscopy (fNIRS) is a non-invasive imaging technique that measures hemodynamic responses in the brain, similar to functional magnetic resonance imaging (fMRI) but with distinct advantages. By utilizing near-infrared light, fNIRS can penetrate biological tissues and detect changes in oxygenated and deoxygenated hemoglobin.  Additionally, fNIRS is portable, noninvasive and inexpensive.  Within the realm of fNIRS, several measurement techniques exist, including Continuous Wave (CW), Frequency Domain (FD), and Time Domain (TD) methods. In this talk, we would focus on the effects, fundamental principles and applications of FD designs.