A 256-channel SPAD detector for time-gated fNIRS and DCS

Jonathan M. Richardson; Tom Y. Cheng; Marco Renna; George Jordy; Matthew S. Stamplis; Ana-Maria Mandrilla Vacca; Michael Bradshaw; Eric Ringdahl; Brian F. Aull; Megan H. Blackwell; Erik K. Duerr; Mitchell B. Robinson; Stefan A. Carp; Maria-Angelica Franceschini

doi:10.1117/12.2666270

15 June 2023 A 256-channel SPAD detector for time-gated fNIRS and DCS

Jonathan M. Richardson, Tom Y. Cheng, Marco Renna, George Jordy, Matthew S. Stamplis, Ana-Maria Mandrilla Vacca, Michael Bradshaw, Eric Ringdahl, Brian F. Aull, Megan H. Blackwell, Erik K. Duerr, Mitchell B. Robinson, Stefan A. Carp, Maria-Angelica Franceschini

Author Affiliations +

Proceedings Volume PC12512, Advanced Photon Counting Techniques XVII; PC1251208 (2023) https://doi.org/10.1117/12.2666270
Event: SPIE Defense + Commercial Sensing, 2023, Orlando, Florida, United States

Abstract

Functional near-infrared spectroscopy (fNIRS) and diffuse correlation spectroscopy (DCS) have shown promise as non-invasive optical methods for cerebral functional imaging. DCS approaches currently have limited sensitivity in adults. fNIRS sensitivity is also limited, particularly in high-detector-density applications. Sensitivity can be improved using temporal discrimination (TD), where the laser excitation is of short (~400ps) duration and the detector rejects early photons that have not penetrated into the brain while maintain high sensitivity to those that have. We report here on the development of a novel 32x32 Single-Photon Avalanche photo-Detector (SPAD) array and Read-Out Integrated Circuit (ROIC) that can operate in either the visible or NIR enabling high-channel-count TD-fNIRS or TD-DCS systems.

Conference Presentation

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Jonathan M. Richardson, Tom Y. Cheng, Marco Renna, George Jordy, Matthew S. Stamplis, Ana-Maria Mandrilla Vacca, Michael Bradshaw, Eric Ringdahl, Brian F. Aull, Megan H. Blackwell, Erik K. Duerr, Mitchell B. Robinson, Stefan A. Carp, and Maria-Angelica Franceschini "A 256-channel SPAD detector for time-gated fNIRS and DCS", Proc. SPIE PC12512, Advanced Photon Counting Techniques XVII, PC1251208 (15 June 2023); https://doi.org/10.1117/12.2666270

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