Optical tomography with amplitude-modulation ultrasound

Yong Yao; Da Xing

doi:10.1117/12.434525

29 June 2001 Optical tomography with amplitude-modulation ultrasound

Yong Yao, Da Xing

Proceedings Volume 4250, Optical Tomography and Spectroscopy of Tissue IV; (2001) https://doi.org/10.1117/12.434525
Event: BiOS 2001 The International Symposium on Biomedical Optics, 2001, San Jose, CA, United States

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.

Citation Download Citation

Yong Yao and Da Xing "Optical tomography with amplitude-modulation ultrasound", Proc. SPIE 4250, Optical Tomography and Spectroscopy of Tissue IV, (29 June 2001); https://doi.org/10.1117/12.434525

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