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. Author manuscript; available in PMC: 2012 Feb 14.
Published in final edited form as: Neuroimage. 2010 Nov 1;54(4):2808–2821. doi: 10.1016/j.neuroimage.2010.10.069

Figure 1.

Figure 1

NIRS measurement configuration. (A) We used two sets of 3×3 measurement patches, one placed over the right frontal cortex, the other over the right parietal cortex. A swimming cap was used to hold the probes against the scalp. Probes (not shown) were plugged in the red or blue holes on the patches. (B) MRI fiducial markers (in white) were affixed to the inner surface of the measurement patch at the locations of the 24 channels (between every emitter-detector pair). The ring-shaped markers allowed us to precisely identify the channel positions. (C) MRI fiducial markers (indicated by arrows) are easily identified in the structural MRI images. (D) A rendering of the skull surface showing the 24 channel markers in one participant, obtained from the T1-weighted image volume. (E) Schematic of the probe/channel configurations on the head. Red circles indicate the photon emitters; blue circles indicate the photon detectors; measurement channels (numbered in square rectangle) are located between emitter/detector pairs.