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Proceedings Paper

Speckle in optical coherence tomography: an overview
Author(s): Joseph M. Schmitt; S. H. Xiang; Kin Man Yung
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Paper Abstract

Speckle arises as a natural consequent of the limited spatial-frequency bandwidth of the interference signals measured in optical coherence tomography (OCT). In images of highly scattering biological tissues, speckle has a dual role as a source of noise and as a carrier of information about tissue microstructure. The first half of this paper provides an overview of the origin, statistical properties, and classification of speckle in OCT. The concepts of signal-carrying and signal-degrading speckle are defined in terms of the phase and amplitude disturbances of the sample beam. In the remaining half of the paper, four speckle- reduction methods--polarization diversity, spatial compounding, frequency compounding and digital signal processing--are discussed and the potential effectiveness of each method is analyzed briefly with the aid of examples. Finally, remaining problems that merit further research are suggested.

Paper Details

Date Published: 4 March 1999
PDF: 12 pages
Proc. SPIE 3726, Saratov Fall Meeting '98: Light Scattering Technologies for Mechanics, Biomedicine, and Material Science, (4 March 1999); doi: 10.1117/12.341428
Show Author Affiliations
Joseph M. Schmitt, Hong Kong Univ. of Science and Technology (United States)
S. H. Xiang, Hong Kong Univ. of Science and Technology (Hong Kong)
Kin Man Yung, Hong Kong Univ. of Science and Technology (Hong Kong)


Published in SPIE Proceedings Vol. 3726:
Saratov Fall Meeting '98: Light Scattering Technologies for Mechanics, Biomedicine, and Material Science
Valery V. Tuchin; Vladimir P. Ryabukho; Dmitry A. Zimnyakov, Editor(s)

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