Signal

Definition: Signal is the variation of a form of energy over space or time. In fNIRS, the term can be used interchangeably for the raw intensity, optical density or hemoglobin concentration changes in time.Definition: Signal is the variation of a form of energy over space or time. In fNIRS, the term can be used interchangeably for the raw intensity, optical density or hemoglobin concentration changes in time.

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Related terms: hemodynamic response