Optics: measuring and testing – For light transmission or absorption
Patent
1997-08-12
1999-05-25
Kim, Robert
Optics: measuring and testing
For light transmission or absorption
356445, 600476, G01B 2100
Patent
active
059074060
ABSTRACT:
A device for imaging a turbid medium, for example a breast of a female, includes a holder for receiving the turbid medium, a light source, a photodetector and a processing unit for deriving the image from the intensities measured. The holder is adapted to receive besides the turbid medium also an adaptation medium having substantial identical optical parameters as the optical parameters of the turbid medium. In this way artefacts in the reconstructed image due to the boundary effect between the turbid medium and the holder can be reduced. When a liquid is used as the adaptation medium a perfect match between the holder and the shape of the turbid medium can be obtained. Further, also intensity differences in the image due to different path lengths between light source and photodetector can be equalized.
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"Fundamentals of Image Processing" A.K. Jain, Prentice Hall, 1989, pp. 439-441.
"Monte Carlo Simulations of Photon Migration Path Distributions in Multiple Scattering Media" by Shechao Feng and Fanan Zeng, Spie vol. 1888, pp. 78-89 in Progress in Biomedical Optics, Proceedings of Photon Migration and Imaging in Random Media and Tissues Jan. 1993, Los Angeles, CA.
Colak Sel B.
Papaioannou Dimitrios
t Hooft Gert W.
van der Mark Martinus B.
Kim Robert
Renfrew, Jr. Dwight H.
U.S. Philips Corporation
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