Short-separation channel
Definition: A short separation channel is generated by placing a source and a detector at a short distance, in case of the adult brain, this is typically ~ 1 cm or less, in contrast to regular long-separation channels with ~3 cm source-detector distances. At such distances, channels are mostly sensitive to systemic activity resulting from extra-cerebral tissues (i.e., scalp and skull). The signal from these channels can be used to regress out extra-cerebral contaminations from the long-separation fNIRS signal in order to isolate the cortical functional response.
Category: Hardware
Related terms: Extra-cerebral signal, Source-detector separation, Measurement Channel
Abbreviation or symbol: SSC, SDC
Synonym: short-distance channel, short channel
References: e.g. https://doi.org/10.1016/j.neuroimage.2013.04.070https://doi.org/10.1117/1.NPh.2.2.025005
https://doi.org/10.1117%2F1.NPh.3.3.031405
Alternative definition:
Related terms (alternative definition): multi-distance measurements
References (alternative definition):
English