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Proceedings Paper

Dual-wavelength multichannel system for time-resolved oximetry
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Paper Abstract

We developed a dual-wavelength multichannel system for near infrared tissue oximetry based on the time-correlated single-photon counting (TSCPC) technique. The light sources are two pulsed laser diodes (672 nm and 818 nm, 1 mW average power, 100 ps pulse duration, 80 MHz repetition rate). The time-resolved reflectance photons are detected by a multi- anode photomultiplier and the output signals are redirected by a router to different memory blocks of a TCSPC PC board (25 ps temporal resolution, 1 MHz acquisition frequency). The system accuracy in determining the absorption and reduced scattering coefficients were tested on phantoms. Preliminary in vivo tissue oxygenation measurements were performed on healthy volunteers in different physiological conditions.

Paper Details

Date Published: 30 December 1998
PDF: 9 pages
Proc. SPIE 3566, Photon Propagation in Tissues IV, (30 December 1998);
Show Author Affiliations
Alessandro Torricelli, Politecnico di Milano (Italy)
Rinaldo Cubeddu, Politecnico di Milano (Italy)
Antonio Pifferi, Politecnico di Milano (Italy)
Paola Taroni, Politecnico di Milano (Italy)
Gianluca Valentini, Politecnico di Milano (Italy)

Published in SPIE Proceedings Vol. 3566:
Photon Propagation in Tissues IV
David A. Benaron M.D.; Britton Chance; Marco Ferrari; Matthias Kohl-Bareis, Editor(s)

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