Figure 1
From: Functional near-infrared spectroscopy studies in children
NIRS apparatus, Hitachi Optical topography system ETG-4000 (Hitachi Medical Corp., Tokyo, Japan). The NIRS apparatus and ultrasound scanner were the same size. A head splint equipped with NIRS probes was attached (upper). Typical hemoglobin (Hb) response during a task (lower). The Hb concentrations are shown in red (oxy-Hb), yellow (total-Hb), and blue (deoxy-Hb). The blue and green vertical lines indicate the starting and ending times of a task, respectively.