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Proceedings Paper

Near-infrared time-resolved spectroscopy system for tissue oxygenation monitor
Author(s): Motoki Oda; Yutaka Yamashita; Tetsuhisa Nakano; Akihiro Suzuki; Keiji Shimizu; Isuke Hirano; Fumihiko Shimomura; Etsuko Ohmae; Toshihiko Suzuki; Yutaka Tsuchiya
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Paper Abstract

We developed a three wavelength time-resolved spectroscopy system called the TRS-10 for use as a tissue oxygenation monitor. The TRS-10 achieved a higher data acquisition rate and a system miniaturization maintaining high sensitivity and time resolution. The TRS-10 consists of a three wavelength picosecond light pulser (PLP) with auto power control as a pulsed light source, a photomultiplier tube (PMT) having high speed and high sensitivity and miniaturized signal processing circuits for time-resolved measurement (CFD, TAC, A/D converter and histogram memory). The TRS-10 system was used to measure the time course of oxygen metabolism in a human forearm with a pneumatic cuff attached to occlude blood flow. Our system succeeded in accurately measuring concentrations of Oxy- (HbO2) and deoxyhemoglobin (Hb) in the human forearm based on diffusion theory by means of TRS data observation having an accumulation time of one second per point.

Paper Details

Date Published: 15 July 1999
PDF: 7 pages
Proc. SPIE 3597, Optical Tomography and Spectroscopy of Tissue III, (15 July 1999); doi: 10.1117/12.356809
Show Author Affiliations
Motoki Oda, Hamamatsu Photonics KK (Japan)
Yutaka Yamashita, Hamamatsu Photonics KK (Japan)
Tetsuhisa Nakano, Hamamatsu Photonics KK (Japan)
Akihiro Suzuki, Hamamatsu Photonics KK (Japan)
Keiji Shimizu, Hamamatsu Photonics KK (Japan)
Isuke Hirano, Hamamatsu Photonics KK (Japan)
Fumihiko Shimomura, Hamamatsu Photonics KK (Japan)
Etsuko Ohmae, Hamamatsu Photonics KK (Japan)
Toshihiko Suzuki, Hamamatsu Photonics KK (Japan)
Yutaka Tsuchiya, Hamamatsu Photonics KK (Japan)


Published in SPIE Proceedings Vol. 3597:
Optical Tomography and Spectroscopy of Tissue III
Britton Chance; Robert R. Alfano; Bruce J. Tromberg, Editor(s)

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