Methods and apparatus for imaging with diffuse light

Details Methods and apparatus for imaging with diffuse light Methods and apparatus for imaging with diffuse light

1994-03-01

1996-06-18

McGraw, Vincent P.

Optics: measuring and testing

By particle light scattering

With photocell detection

128665, 356 41, G01N 2149, A61B 600

Patent

active

055283659

ABSTRACT:
Methods of imaging objects with diffused light. The methods preferably can comprise the steps of illuminating the object with a source of light which can be scattered by the object, collecting the scattered light with a detector from multiple positions surrounding the object, measuring a mean free path of photons scattered from the object from the collected scattered light, and determining a diffusion constant for the photons scattered from the object as a function of the measured mean free path, and determining in the transmission of the photons between the source and the detector as a function of the diffusion constant, thereby imaging the object. Methods and apparatus described herein efficiently image objects with diffuse light by taking into account source-detector orientation and boundary effects.

REFERENCES:
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patent: 5119815 (1992-06-01), Chance
Oda et al "Non-Invasive hemoglobin oxygenation monitor and computed tomography by NIR spectrophotometry" SPIE vol. 1431 Time-Resolved Spectroscopy and Imaging Tissue (1991) pp. 284-293. Copy 356/41.
K. M. Yoo, F. Lie, R. R. Alfano, Optics Letters, vol. 16, No. 14, p. 1068 (1991).
D. A. Banaron, D. K. Stevenson, Science,vol. 259, p. 1463 (1993).
J. Schotland, J. Haselgrove, J. Leigh, Applied Optics,vol.32, p. 448 (1993).

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