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Proceedings Paper

Optical tomography with amplitude-modulation ultrasound
Author(s): Yong Yao; Da Xing
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Paper Abstract

In this paper, we demonstrated a novel method to utilize a scattering near infrared light localized by an amplitude-modulated ultrasonic wave to image a buried object in a dense scattering medium through the synchronous scanning of the focused-ultrasound and a NIR laser beam. The frequency of the ultrasound (carrier wave) for localization of scattering light is 1MHz, and its amplitude is modulated by a low frequency sine waveform (modulation wave, 10KHz). The low frequency light signal from the focal zone of the ultrasound demodulated by real-time FFT. This scheme can increase a signal-to-noise ratio (SNR) of the ultrasound-localized-optical-tomography of tissues structure with different optical parameters. A better-quality optical tomography image of buried objects within simulating tissue is reconstructed by the detection and demodulation of the scattering light under the action of amplitude-modulated ultrasonic wave.

Paper Details

Date Published: 29 June 2001
PDF: 6 pages
Proc. SPIE 4250, Optical Tomography and Spectroscopy of Tissue IV, (29 June 2001); doi: 10.1117/12.434525
Show Author Affiliations
Yong Yao, South China Normal Univ. (China)
Da Xing, South China Normal Univ. (China)

Published in SPIE Proceedings Vol. 4250:
Optical Tomography and Spectroscopy of Tissue IV
Britton Chance; Robert R. Alfano; Bruce J. Tromberg; Mamoru Tamura; Eva Marie Sevick-Muraca, Editor(s)

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