Cross-talk

Definition: By cross-talk we mean to describe the phenomena that a genuine change in one chromophore concentration is also inducing a spurious measured concentration change in another. This phenomena can also apply to cross-talk between changes in the absorption and scattering coefficient. In the context of the hardware, cross-talk can also be applied in the context of physical measurement of light, where a direct measurement between a single source and detector can be contaminated by other sources of light. This is usually mitigated by the use of time multiplexing or frequency multiplexing. When utilizing silicon photomultipliers for photodetection, optical cross-talk may occur when an incident photon hits a microcell. This initial discharge can cause additional discharges in adjacent microcells, leading to an undesired amplification of the signal output.

Alternative definition:

Synonym: Signal crosstalk

References:

https://doi.org/10.1016/j.neuroimage.2004.02.023

https://doi.org/10.1117/1.nph.3.3.031405

Related terms: