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Development and in-vivo validation of a Continuous Wave (CW) functional Near Infrared Spectroscopy (fNIRS) system is presented. The system is wearable, fiber-less, multi-channel (16×16, 256 channels) and expandable and it relies on silicon photomultipliers (SiPMs) for light detection. SiPMs are inexpensive, low voltage and resilient semiconductor light detectors, whose performances are analogous to photomultiplier tubes (PMTs). The advantage of SiPMs with respect to PMTs is that they allow direct contact with the scalp and avoidance of optical fibers. In fact, the coupling of SiPMs and light emitting diodes (LEDs) allows the transfer of the analog signals to and from the scalp through thin electric cables that greatly increase the system flexibility. Moreover, the optical probes, mechanically resembling electroencephalographic electrodes, are robust against motion artifacts. In order to increase the signal-to-noise …
Publication date: 
23 Jul 2019

AM Chiarelli, D Perpetuini, G Greco, L Mistretta, R Rizzo, V Vinciguerra, MF Romeo, A Merla, PG Fallica, GC Giaconia

Biblio References: 
Pages: 60-66
2019 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)