Figure 5

(a) Illustration of the measurement session (drawn by author SS). (b) Position of the probe on the subject’s head. (c) Histogram of source-detector separations used in the imaging. (d) The relative sensitivity map thresholded at 0.1 (white line), 0.01 (light gray line) and 0.001 (dark gray line) superimposed on an axial slice. (e) Relative positions of the sources (black crosses) and detectors (gray circles) with color-coding of the interconnecting lines indicating source-detector distances (SDS) up to 45 mm.