Measurement Channel

Definition: A channel in fNIRS is typically the combination of a source and a detector that together produce a single stream of measurement data from a circumscribed portion of underlying brain (or other) tissue. A channel’s position is marked mid-way between its source and detector pair in a 3D space, which also indicates the surface projection of the underlying brain area where emitted photons have the highest probability of interacting with brain tissue.

Alternative definition:

Synonym: Channel, Source-detector pair

References: https://doi.org/10.1186/s12938-018-0554-9

Related terms: Short-separation channel