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Proceedings Paper

Coherent detection imaging of absorption and scattering in tissues and tissuelike phantoms
Author(s): Kin Pui Chan; Makoto Yamada; Balasigamani Devaraj; Keisuke Fukuchi; Humio Inaba
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Paper Abstract

This paper presents measurement results of absorption and scattering in tissues and tissuelike phantoms by using coherent detection imaging (CDI) technique. CDI measurements are carried out in 0.8 - 1.3 micrometer wavelength region by using several continuous wave, single frequency lasers, including a tunable Ti:sapphire laser and laser diode-pumped Nd:YAG lasers. A 120 dB dynamic range achieved with less than 10 mW incident power and a detection time of 0.1 msec enables spectroscopic measurements through attenuation of as much as exp(-27). Measurement results using cw lasers are also compared to the temporal scattering profiles of coherent photon migration in highly scattering media. For this purpose, a modified CDI system using low-coherence super luminescent diodes has been developed. The results from the laser and low coherence CDI measurements are found to be consistent.

Paper Details

Date Published: 18 December 1995
PDF: 7 pages
Proc. SPIE 2626, Photon Propagation in Tissues, (18 December 1995); doi: 10.1117/12.228673
Show Author Affiliations
Kin Pui Chan, Biophotonics Information Labs. (Japan)
Makoto Yamada, Biophotonics Information Labs. (Japan)
Balasigamani Devaraj, Biophotonics Information Labs. (Japan)
Keisuke Fukuchi, Biophotonics Information Labs. (Japan)
Humio Inaba, Tohoku Institute of Technology (Japan)

Published in SPIE Proceedings Vol. 2626:
Photon Propagation in Tissues
Britton Chance; David T. Delpy; Gerhard J. Mueller, Editor(s)

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