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Proceedings Paper

Detection of an object inside a phantom tissue using a spatial filter
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Paper Abstract

We report the detection of an object inside a phantom tissue using a spatial filter and a 5-mW He-Ne Laser. The phantom tissue is composed of 8% scattering polystyrene spheres and is diluted to different concentrations in water. The solution is placed inside of a cuvette of length 5 cm and width 5 cm. The spatial filter, composed of a 4-cm plano-convex lens and a 10-micrometers pinhole, is able to extract ballistic and quasi-ballistic photons from the transmitted light. A photomultiplier tube is used for detection, and a lock-in amplifier is used to reduce the amount of noise in the signal. We are able to detect the object in a phantom tissue of 20 mean free paths [mfp] with a contrast of 99.0%. The contrast in a tissue with 30 mfp is 22.7%.

Paper Details

Date Published: 19 May 1994
PDF: 9 pages
Proc. SPIE 2135, Advances in Laser and Light Spectroscopy to Diagnose Cancer and Other Diseases, (19 May 1994); doi: 10.1117/12.175994
Show Author Affiliations
Dawn V. Stephens, Clark Atlanta Univ. (United States)
Frank K. Tittel, Rice Univ. (United States)
Lihong V. Wang, Univ. of Texas M.D. Anderson Cancer Ctr. (United States)
Andreas H. Hielscher, Univ. of Texas M.D. Anderson Cancer Ctr. (United States)
Steven L. Jacques, Univ. of Texas M.D. Anderson Cancer Ctr. (United States)


Published in SPIE Proceedings Vol. 2135:
Advances in Laser and Light Spectroscopy to Diagnose Cancer and Other Diseases
Robert R. Alfano, Editor(s)

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