Dual-wavelength multichannel system for time-resolved oximetry

Alessandro Torricelli; Rinaldo Cubeddu; Antonio Pifferi; Paola Taroni; Gianluca Valentini

doi:10.1117/12.334356

30 December 1998 Dual-wavelength multichannel system for time-resolved oximetry

Alessandro Torricelli, Rinaldo Cubeddu, Antonio Pifferi, Paola Taroni, Gianluca Valentini

Proceedings Volume 3566, Photon Propagation in Tissues IV; (1998) https://doi.org/10.1117/12.334356
Event: BiOS Europe '98, 1998, Stockholm, Sweden

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.

Citation Download Citation

Alessandro Torricelli, Rinaldo Cubeddu, Antonio Pifferi, Paola Taroni, and Gianluca Valentini "Dual-wavelength multichannel system for time-resolved oximetry", Proc. SPIE 3566, Photon Propagation in Tissues IV, (30 December 1998); https://doi.org/10.1117/12.334356

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