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Proceedings Paper

Ultrasound-modulated laser tomography
Author(s): Lihong V. Wang; Gang Yao
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Paper Abstract

An ultrasonic beam was focused into a biological tissue sample to modulate the laser light passing through the ultrasonic beam inside the tissue. The speckle field formed by the transmitted laser light was detected by a CCD camera with the source-synchronous-illumination lock-in technique. The ultrasound-modulated laser light reflects the local optical and mechanical properties within the ultrasonic beam and can be used for tomographic imaging of the tissue. Spatial resolution along the ultrasonic axis was achieved by sweeping the ultrasonic frequency. Two-dimensional images of biological tissue were successfully obtained with both single frequency modulation and frequency-swept modulation. Three-dimensional images could be acquired as well in principle.

Paper Details

Date Published: 4 May 2001
PDF: 5 pages
Proc. SPIE 4241, Saratov Fall Meeting 2000: Optical Technologies in Biophysics and Medicine II, (4 May 2001); doi: 10.1117/12.431526
Show Author Affiliations
Lihong V. Wang, Texas A&M Univ. (United States)
Gang Yao, Texas A&M Univ. (United States)


Published in SPIE Proceedings Vol. 4241:
Saratov Fall Meeting 2000: Optical Technologies in Biophysics and Medicine II
Valery V. Tuchin, Editor(s)

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